diff --git a/package/kodi-screensaver-rsxs/0001-cross-compile.patch b/package/kodi-screensaver-rsxs/0001-cross-compile.patch
deleted file mode 100644
index a7b2053d76..0000000000
--- a/package/kodi-screensaver-rsxs/0001-cross-compile.patch
+++ /dev/null
@@ -1,37 +0,0 @@
-Fix cross-compilation
-
-Use the cross-compiler and not the host version.
-
-Patch sent upstream:
-https://github.com/notspiff/screensavers.rsxs/pull/5
-
-Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
-
-diff -uNr screensavers.rsxs-195e0ec3fbbcb2ee2012cd560e42d05167f0f259.org/CMakeLists.txt screensavers.rsxs-195e0ec3fbbcb2ee2012cd560e42d05167f0f259/CMakeLists.txt
---- screensavers.rsxs-195e0ec3fbbcb2ee2012cd560e42d05167f0f259.org/CMakeLists.txt	2015-03-19 12:20:23.000000000 +0100
-+++ screensavers.rsxs-195e0ec3fbbcb2ee2012cd560e42d05167f0f259/CMakeLists.txt	2015-07-19 20:26:16.660481032 +0200
-@@ -33,6 +33,11 @@
-                     ${PROJECT_SOURCE_DIR}/${rsxs_dir}/src/skyrocket
-                     ${PROJECT_SOURCE_DIR}/${rsxs_dir}/src/solarwinds)
-                         
-+
-+get_filename_component( COMPILER_FILENAME "${CMAKE_C_COMPILER}" NAME )
-+string( REGEX REPLACE "-[^-]+$" ""
-+        TOOLCHAIN_NAME "${COMPILER_FILENAME}" )
-+
- include(ExternalProject)
- set(update_command "")
- if(BOOTSTRAP_IN_TREE OR NOT DEFINED BOOTSTRAP_IN_TREE)
-@@ -46,8 +51,11 @@
-   endif()
- endif()
- externalproject_add(rsxs SOURCE_DIR ${PROJECT_SOURCE_DIR}/${rsxs_dir}
--                    CONFIGURE_COMMAND ${configure_start}
-+                    CONFIGURE_COMMAND gl_cv_func_gettimeofday_clobber=no ac_cv_type__Bool=yes
-+                                      ac_cv_func_malloc_0_nonnull=yes
-+                                      ${configure_start}
-                                       --prefix=<INSTALL_DIR>
-+                                      --host=${TOOLCHAIN_NAME}
-                                       --without-xscreensaver
-                                       --disable-cyclone
-                                       --disable-euphoria
diff --git a/package/kodi-screensaver-rsxs/0001-various-build-fixes.patch b/package/kodi-screensaver-rsxs/0001-various-build-fixes.patch
new file mode 100644
index 0000000000..4b62d3cb2b
--- /dev/null
+++ b/package/kodi-screensaver-rsxs/0001-various-build-fixes.patch
@@ -0,0 +1,11435 @@
+Various build fixes
+
+Downloaded from upstream PR 21 and rebased.
+
+Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
+
+
+From 40107fae00c39f5d627ecd04047294cda19bd425 Mon Sep 17 00:00:00 2001
+From: Alwin Esch <alwin.esch@web.de>
+Date: Mon, 11 Mar 2019 14:25:01 +0100
+Subject: [PATCH 1/3] update README.md to match right URL's
+
+---
+ README.md | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/README.md b/README.md
+index a0c9d6f..9e12565 100644
+--- a/README.md
++++ b/README.md
+@@ -2,7 +2,7 @@
+ 
+ This is a collection of [Kodi](http://kodi.tv) screensaver addons.
+ 
+-[![Build Status](https://travis-ci.org/notspiff/screensavers.rsxs.svg?branch=master)](https://travis-ci.org/notspiff/screensavers.rsxs)
++[![Build Status](https://travis-ci.org/xbmc/screensavers.rsxs.svg?branch=master)](https://travis-ci.org/xbmc/screensavers.rsxs)
+ 
+ ## Build instructions
+ 
+@@ -16,7 +16,7 @@ The following instructions assume you will have built Kodi already in the `kodi-
+ suggested by the README.
+ 
+ 1. `git clone --branch Leia https://github.com/xbmc/xbmc.git`
+-2. `git clone https://github.com/notspiff/screensavers.rsxs.git`
++2. `git clone https://github.com/xbmc/screensavers.rsxs.git`
+ 3. `cd screensavers.rsxs && mkdir build && cd build`
+ 4. `cmake -DADDONS_TO_BUILD=screensavers.rsxs -DADDON_SRC_PREFIX=../.. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=../../xbmc/kodi-build/addons -DPACKAGE_ZIP=1 ../../xbmc/cmake/addons`
+ 5. `make`
+
+From 7361b8d540a51db20df896b315c2ac1ddded3e64 Mon Sep 17 00:00:00 2001
+From: Alwin Esch <alwin.esch@web.de>
+Date: Tue, 19 Mar 2019 18:32:26 +0100
+Subject: [PATCH 2/3] Cleanup and fix multi OS support
+
+---
+ .gitignore                                    |    2 -
+ .travis.yml                                   |   10 +-
+ CMakeLists.txt                                |   22 +-
+ FindLTDL.cmake                                |   18 -
+ Jenkinsfile                                   |    2 +-
+ debian/changelog                              |    7 -
+ debian/compat                                 |    2 +-
+ debian/control                                |    5 +-
+ depends/common/bz2/CMakeLists.txt             |    3 +-
+ depends/common/glm/glm.sha256                 |    2 +-
+ depends/common/glm/glm.txt                    |    2 +-
+ depends/common/imagemagick/CMakeLists.txt     |   51 -
+ depends/common/imagemagick/deps.txt           |    4 -
+ depends/common/imagemagick/flags.txt          |    1 -
+ depends/common/imagemagick/imagemagick.sha256 |    1 -
+ depends/common/imagemagick/imagemagick.txt    |    1 -
+ depends/common/jpeg-9b/CMakeLists.txt         |   14 -
+ depends/common/jpeg-9b/jpeg-9b.sha256         |    1 -
+ depends/common/jpeg-9b/jpeg-9b.txt            |    1 -
+ depends/common/libtool/CMakeLists.txt         |   14 -
+ depends/common/libtool/libtool.sha256         |    1 -
+ depends/common/libtool/libtool.txt            |    1 -
+ depends/common/png/deps.txt                   |    1 -
+ depends/common/png/flags.txt                  |    1 -
+ depends/common/png/png.sha256                 |    1 -
+ depends/common/png/png.txt                    |    1 -
+ depends/common/tiff/CMakeLists.txt            |   14 -
+ depends/common/tiff/tiff.sha256               |    1 -
+ depends/common/tiff/tiff.txt                  |    1 -
+ depends/common/zlib/01-build-static.patch     |   36 -
+ depends/common/zlib/zlib.sha256               |    1 -
+ depends/common/zlib/zlib.txt                  |    1 -
+ depends/osx/glm/glm.sha256                    |    2 +-
+ depends/osx/glm/glm.txt                       |    2 +-
+ lib/ImageMagick/CMakeLists.txt                |   63 -
+ src/biof/CMakeLists.txt                       |    5 +-
+ src/busyspheres/CMakeLists.txt                |    5 +-
+ src/colorfire/CMakeLists.txt                  |    5 +-
+ src/cyclone/CMakeLists.txt                    |    5 +-
+ src/drempels/CMakeLists.txt                   |   22 +-
+ src/drempels/TexMgr.cpp                       |  102 +-
+ src/drempels/stb_image.h                      | 7547 +++++++++++++++++
+ src/drempels/stb_image_resize.h               | 2630 ++++++
+ src/euphoria/CMakeLists.txt                   |    5 +-
+ src/feedback/CMakeLists.txt                   |    5 +-
+ src/fieldlines/CMakeLists.txt                 |    5 +-
+ src/flocks/CMakeLists.txt                     |    5 +-
+ src/flux/CMakeLists.txt                       |    5 +-
+ src/helios/CMakeLists.txt                     |    5 +-
+ src/hufosmoke/CMakeLists.txt                  |    5 +-
+ src/hufotunnel/CMakeLists.txt                 |    5 +-
+ src/hyperspace/CMakeLists.txt                 |    5 +-
+ src/lattice/CMakeLists.txt                    |    5 +-
+ src/lorenz/CMakeLists.txt                     |    5 +-
+ src/matrixview/CMakeLists.txt                 |    5 +-
+ src/microcosm/CMakeLists.txt                  |    5 +-
+ src/plasma/CMakeLists.txt                     |    5 +-
+ src/skyrocket/CMakeLists.txt                  |    5 +-
+ src/solarwinds/CMakeLists.txt                 |    5 +-
+ src/spirographx/CMakeLists.txt                |    5 +-
+ src/sundancer2/CMakeLists.txt                 |    5 +-
+ 61 files changed, 10268 insertions(+), 433 deletions(-)
+ delete mode 100644 FindLTDL.cmake
+ delete mode 100644 debian/changelog
+ delete mode 100644 depends/common/imagemagick/CMakeLists.txt
+ delete mode 100644 depends/common/imagemagick/deps.txt
+ delete mode 100644 depends/common/imagemagick/flags.txt
+ delete mode 100644 depends/common/imagemagick/imagemagick.sha256
+ delete mode 100644 depends/common/imagemagick/imagemagick.txt
+ delete mode 100644 depends/common/jpeg-9b/CMakeLists.txt
+ delete mode 100644 depends/common/jpeg-9b/jpeg-9b.sha256
+ delete mode 100644 depends/common/jpeg-9b/jpeg-9b.txt
+ delete mode 100644 depends/common/libtool/CMakeLists.txt
+ delete mode 100644 depends/common/libtool/libtool.sha256
+ delete mode 100644 depends/common/libtool/libtool.txt
+ delete mode 100644 depends/common/png/deps.txt
+ delete mode 100644 depends/common/png/flags.txt
+ delete mode 100644 depends/common/png/png.sha256
+ delete mode 100644 depends/common/png/png.txt
+ delete mode 100644 depends/common/tiff/CMakeLists.txt
+ delete mode 100644 depends/common/tiff/tiff.sha256
+ delete mode 100644 depends/common/tiff/tiff.txt
+ delete mode 100644 depends/common/zlib/01-build-static.patch
+ delete mode 100644 depends/common/zlib/zlib.sha256
+ delete mode 100644 depends/common/zlib/zlib.txt
+ delete mode 100644 lib/ImageMagick/CMakeLists.txt
+ create mode 100644 src/drempels/stb_image.h
+ create mode 100644 src/drempels/stb_image_resize.h
+
+diff --git a/.gitignore b/.gitignore
+index 1f8f2fd..07408fa 100644
+--- a/.gitignore
++++ b/.gitignore
+@@ -36,5 +36,3 @@ obj-x86_64-linux-gnu/
+ 
+ # clion
+ .idea/
+-
+-*.patch
+diff --git a/.travis.yml b/.travis.yml
+index 61219bd..09070da 100644
+--- a/.travis.yml
++++ b/.travis.yml
+@@ -1,4 +1,4 @@
+-+language: cpp
++language: cpp
+ 
+ #
+ # Define the build matrix
+@@ -24,15 +24,7 @@ matrix:
+     - os: osx
+       osx_image: xcode9
+ 
+-#
+-# Some of the OS X images don't have cmake, contrary to what people
+-# on the Internet say
+-#
+ before_install:
+-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then which cmake || brew update        ; fi
+-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then which cmake || brew install cmake ; fi
+-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update && brew upgrade cmake libpng libtiff || true; fi
+-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install libtool openjpeg xz ; fi # depends for ImageMagick 7
+   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install -y libgl1-mesa-dev; fi
+ 
+ #
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index a86ccd0..feeff64 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -3,23 +3,11 @@ project(screensavers.rsxs)
+ 
+ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR})
+ 
+-enable_language(CXX)
+-
+ cmake_policy(SET CMP0054 NEW)
+ 
+-option(OWN_IMAGE_MAGICK "Build own reduced ImageMagick" OFF)
+-
+ find_package(Kodi REQUIRED)
+-find_package(ImageMagick COMPONENTS MagickCore)
+-find_package(ImageMagick COMPONENTS MagickWand)
+ find_package(glm REQUIRED)
+ find_package(gli REQUIRED)
+-find_package(JPEG REQUIRED)
+-find_package(TIFF REQUIRED)
+-find_package(PNG REQUIRED)
+-find_package(LTDL)
+-
+-# set(APP_RENDER_SYSTEM "gles") # Leaved here for test purpose only
+ 
+ if(APP_RENDER_SYSTEM STREQUAL "gl" OR NOT APP_RENDER_SYSTEM)
+   find_package(OpenGl REQUIRED)
+@@ -37,18 +25,12 @@ include_directories(${KODI_INCLUDE_DIR}/.. # Hack way with "/..", need bigger Ko
+                     ${GLM_INCLUDE_DIR}
+                     ${GLI_INCLUDE_DIR})
+ 
+-if(ImageMagick_FOUND AND NOT ${OWN_IMAGE_MAGICK})
+-  message(STATUS "ImageMagick found in the system and is used")
+-else()
+-  message(STATUS "ImageMagick not found or forced and add custom created")
+-  add_subdirectory(lib/ImageMagick)
+-endif()
+ add_subdirectory(lib/kodi/gui/gl)
+ add_subdirectory(lib/Implicit)
+ add_subdirectory(lib/Rgbhsl)
+ add_subdirectory(lib/rsMath)
+ 
+-list(APPEND DEPENDS glm gli rsMath kodiOpenGL ImageMagick)
++list(APPEND DEPENDS glm gli rsMath kodiOpenGL)
+ list(APPEND DEPLIBS rsMath kodiOpenGL Implicit Rgbhsl)
+ 
+ if(NOT ${CORE_SYSTEM_NAME} STREQUAL "")
+@@ -63,7 +45,6 @@ if(CMAKE_BUILD_TYPE)
+   message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
+ endif()
+ 
+-
+ set(DUMMY_SOURCES ${PROJECT_SOURCE_DIR}/src/dummy.cpp)
+ 
+ include(src/biof/CMakeLists.txt)
+@@ -91,4 +72,3 @@ include(src/spirographx/CMakeLists.txt)
+ include(src/sundancer2/CMakeLists.txt)
+ 
+ include(CPack)
+-
+diff --git a/FindLTDL.cmake b/FindLTDL.cmake
+deleted file mode 100644
+index 2afc42c..0000000
+--- a/FindLTDL.cmake
++++ /dev/null
+@@ -1,18 +0,0 @@
+-find_path(LTDL_INCLUDE_DIR ltdl.h)
+-if (NOT WIN32)
+-    find_library(LTDL_LIBRARY NAMES libtldl ltdl)
+-endif()
+-
+-include(FindPackageHandleStandardArgs)
+-if (NOT WIN32)
+-    find_package_handle_standard_args(LTDL DEFAULT_MSG
+-                                      LTDL_LIBRARY LTDL_INCLUDE_DIR)
+-else()
+-    find_package_handle_standard_args(LTDL DEFAULT_MSG
+-                                      LTDL_INCLUDE_DIR)
+-endif()
+-
+-mark_as_advanced(LTDL_INCLUDE_DIR LTDL_LIBRARY)
+-
+-set(LTDL_INCLUDE_DIRS ${LTDL_INCLUDE_DIR})
+-set(LTDL_LIBRARIES ${LTDL_LIBRARY})
+diff --git a/Jenkinsfile b/Jenkinsfile
+index a229fa5..43a94b4 100644
+--- a/Jenkinsfile
++++ b/Jenkinsfile
+@@ -1 +1 @@
+-buildPlugin(version: "Leia")
++buildPlugin(platforms: ['android-armv7', 'android-aarch64', 'ios-armv7', 'ios-aarch64', 'osx-x86_64', 'ubuntu-ppa'])
+diff --git a/debian/changelog b/debian/changelog
+deleted file mode 100644
+index c299464..0000000
+--- a/debian/changelog
++++ /dev/null
+@@ -1,7 +0,0 @@
+-kodi-screensavers-rsxs (3.0.0-0~cosmic) cosmic; urgency=low
+-
+-  [ xbmc ]
+-  * autogenerated dummy changelog
+-
+- -- Arne Morten Kvarving <arne.morten.kvarving@sintef.no>  Sat, 01 Jun 2013 00:59:22 +0200
+-
+diff --git a/debian/compat b/debian/compat
+index b4de394..45a4fb7 100644
+--- a/debian/compat
++++ b/debian/compat
+@@ -1 +1 @@
+-11
++8
+diff --git a/debian/control b/debian/control
+index a1a94b0..cfac7f8 100644
+--- a/debian/control
++++ b/debian/control
+@@ -5,10 +5,7 @@ Build-Depends: debhelper (>= 9.0.0), cmake, kodi-addon-dev,
+                libgl1-mesa-dev, libltdl-dev,
+                libglm-dev, opengl-image-dev,
+                automake, autoconf, libtool,
+-               libbz2-dev, zlib1g-dev,
+-               libpng-dev, libjpeg-dev, libtiff-dev,
+-               libmagickcore-dev, libmagickwand-dev,
+-               libmagickwand-6-headers
++               libbz2-dev
+ Standards-Version: 4.1.2
+ Section: libs
+ Homepage: http://kodi.org
+diff --git a/depends/common/bz2/CMakeLists.txt b/depends/common/bz2/CMakeLists.txt
+index 4d8755c..6b1a0a5 100644
+--- a/depends/common/bz2/CMakeLists.txt
++++ b/depends/common/bz2/CMakeLists.txt
+@@ -1,7 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(bzip2)
+ 
+-cmake_minimum_required(VERSION 2.8)
+-
+ if(NOT WIN32)
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_FILE_OFFSET_BITS=64")
+ elseif(CMAKE_SYSTEM_NAME STREQUAL WindowsStore)
+diff --git a/depends/common/glm/glm.sha256 b/depends/common/glm/glm.sha256
+index a2281e4..7339f4f 100644
+--- a/depends/common/glm/glm.sha256
++++ b/depends/common/glm/glm.sha256
+@@ -1 +1 @@
+-7f093f11c49877716bab96813c2e834db6839095281c8c0c65c60c8bdb9504a3
++fba9fd177073a36c5a7798c74b28e79ba6deb8f4bb0d2dbfc0e207c27da7e12c
+diff --git a/depends/common/glm/glm.txt b/depends/common/glm/glm.txt
+index eeb544e..090db8c 100644
+--- a/depends/common/glm/glm.txt
++++ b/depends/common/glm/glm.txt
+@@ -1 +1 @@
+-glm https://github.com/g-truc/glm/archive/47031aa4b7b079716e4cac496819e7f464b6a713.tar.gz
++glm https://github.com/g-truc/glm/archive/0.9.9.3.tar.gz
+diff --git a/depends/common/imagemagick/CMakeLists.txt b/depends/common/imagemagick/CMakeLists.txt
+deleted file mode 100644
+index fa924de..0000000
+--- a/depends/common/imagemagick/CMakeLists.txt
++++ /dev/null
+@@ -1,51 +0,0 @@
+-project(ImageMagick)
+-
+-cmake_minimum_required(VERSION 3.3)
+-
+-find_package(JPEG REQUIRED)
+-find_package(TIFF REQUIRED)
+-find_package(PNG REQUIRED)
+-find_package(LTDL)
+-
+-include_directories(${LTDL_INCLUDE_DIRS} ${JPEG_INCLUDE_DIRS} ${PNG_INCLUDE_DIR} ${TIFF_INCLUDE_DIR})
+-
+-message(STATUS "--------------------------_> ${CMAKE_MODULE_PATH}")
+-# Force on travis where only Ubuntu 16.04 Xenial is available the use of gcc
+-# on Image Magick, otherwise brings it configure errors!
+-if(DEFINED ENV{TRAVIS_COMPILER})
+-  if($ENV{TRAVIS_COMPILER} STREQUAL "clang")
+-    set(OVERRIDE_COMPILER CC=gcc CXX=g++)
+-  endif()
+-endif()
+-
+-include(ExternalProject)
+-ExternalProject_Add(ImageMagick
+-                    SOURCE_DIR ${CMAKE_SOURCE_DIR}
+-                    UPDATE_COMMAND ""
+-                    CONFIGURE_COMMAND ${OVERRIDE_COMPILER} <SOURCE_DIR>/configure
+-                      --prefix=${OUTPUT_DIR}
+-                      --enable-static
+-                      --disable-shared
+-                      --disable-opencl
+-                      --with-pic
+-                      --without-x
+-                      --without-magick-plus-plus
+-                      --without-openexr
+-                      --without-openjp2
+-                      --without-pango
+-                      --without-fftw
+-                      --without-fontconfig
+-                      --without-freetype
+-                      --without-djvu
+-                      --without-lcms
+-                      --without-jbig
+-                      --without-lqr
+-                      --without-bzlib
+-                      --without-lzma
+-                      --without-webp
+-                      --without-xml
+-                      --without-gvc
+-                    INSTALL_COMMAND ""
+-                    BUILD_IN_SOURCE 1)
+-
+-install(CODE "execute_process(COMMAND make install WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})")
+diff --git a/depends/common/imagemagick/deps.txt b/depends/common/imagemagick/deps.txt
+deleted file mode 100644
+index 2c6f62f..0000000
+--- a/depends/common/imagemagick/deps.txt
++++ /dev/null
+@@ -1,4 +0,0 @@
+-jpeg-9b
+-tiff
+-png
+-libtool
+diff --git a/depends/common/imagemagick/flags.txt b/depends/common/imagemagick/flags.txt
+deleted file mode 100644
+index 60891cb..0000000
+--- a/depends/common/imagemagick/flags.txt
++++ /dev/null
+@@ -1 +0,0 @@
+--DCMAKE_POSITION_INDEPENDENT_CODE=1
+diff --git a/depends/common/imagemagick/imagemagick.sha256 b/depends/common/imagemagick/imagemagick.sha256
+deleted file mode 100644
+index de260ef..0000000
+--- a/depends/common/imagemagick/imagemagick.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-9ef618f8f55182ae60dbef15242a18c1ece528dac4b8ac4732a41b7f2f4302b0
+diff --git a/depends/common/imagemagick/imagemagick.txt b/depends/common/imagemagick/imagemagick.txt
+deleted file mode 100644
+index 9a8b4e6..0000000
+--- a/depends/common/imagemagick/imagemagick.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-imagemagick https://github.com/ImageMagick/ImageMagick6/archive/6.9.10-25.tar.gz
+diff --git a/depends/common/jpeg-9b/CMakeLists.txt b/depends/common/jpeg-9b/CMakeLists.txt
+deleted file mode 100644
+index 80072ff..0000000
+--- a/depends/common/jpeg-9b/CMakeLists.txt
++++ /dev/null
+@@ -1,14 +0,0 @@
+-cmake_minimum_required(VERSION 3.3)
+-
+-project(jpeg-9b)
+-
+-include(ExternalProject)
+-
+-externalproject_add(jpeg-9b
+-  SOURCE_DIR ${CMAKE_SOURCE_DIR}
+-  UPDATE_COMMAND autoreconf -vif
+-  CONFIGURE_COMMAND CC=${CMAKE_C_COMPILER} AR=${CMAKE_AR} ${CMAKE_SOURCE_DIR}/configure --prefix=${OUTPUT_DIR} --disable-shared --with-pic
+-  INSTALL_COMMAND ""
+-  BUILD_IN_SOURCE 1)
+-
+-install(CODE "execute_process(COMMAND make install WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})")
+diff --git a/depends/common/jpeg-9b/jpeg-9b.sha256 b/depends/common/jpeg-9b/jpeg-9b.sha256
+deleted file mode 100644
+index fc0b3c5..0000000
+--- a/depends/common/jpeg-9b/jpeg-9b.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-240fd398da741669bf3c90366f58452ea59041cacc741a489b99f2f6a0bad052
+diff --git a/depends/common/jpeg-9b/jpeg-9b.txt b/depends/common/jpeg-9b/jpeg-9b.txt
+deleted file mode 100644
+index aeb7c1e..0000000
+--- a/depends/common/jpeg-9b/jpeg-9b.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-jpeg-9b http://mirrors.xbmc.org/build-deps/sources/jpegsrc.v9b.tar.gz
+diff --git a/depends/common/libtool/CMakeLists.txt b/depends/common/libtool/CMakeLists.txt
+deleted file mode 100644
+index 3f97cc7..0000000
+--- a/depends/common/libtool/CMakeLists.txt
++++ /dev/null
+@@ -1,14 +0,0 @@
+-cmake_minimum_required(VERSION 3.3)
+-
+-project(libtool)
+-
+-include(ExternalProject)
+-
+-externalproject_add(libtool
+-  SOURCE_DIR ${CMAKE_SOURCE_DIR}
+-#  UPDATE_COMMAND autoreconf -vif
+-  CONFIGURE_COMMAND CC=${CMAKE_C_COMPILER} AR=${CMAKE_AR} ${CMAKE_SOURCE_DIR}/configure --prefix=${OUTPUT_DIR} --disable-shared --with-pic
+-  INSTALL_COMMAND ""
+-  BUILD_IN_SOURCE 1)
+-
+-install(CODE "execute_process(COMMAND make install WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})")
+diff --git a/depends/common/libtool/libtool.sha256 b/depends/common/libtool/libtool.sha256
+deleted file mode 100644
+index 1f80867..0000000
+--- a/depends/common/libtool/libtool.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-e3bd4d5d3d025a36c21dd6af7ea818a2afcd4dfc1ea5a17b39d7854bcd0c06e3
+diff --git a/depends/common/libtool/libtool.txt b/depends/common/libtool/libtool.txt
+deleted file mode 100644
+index 9154449..0000000
+--- a/depends/common/libtool/libtool.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-libtool http://mirrors.xbmc.org/build-deps/sources/libtool-2.4.6.tar.gz
+diff --git a/depends/common/png/deps.txt b/depends/common/png/deps.txt
+deleted file mode 100644
+index f22003e..0000000
+--- a/depends/common/png/deps.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-zlib
+diff --git a/depends/common/png/flags.txt b/depends/common/png/flags.txt
+deleted file mode 100644
+index b666a4d..0000000
+--- a/depends/common/png/flags.txt
++++ /dev/null
+@@ -1 +0,0 @@
+--DPNG_SHARED=0
+diff --git a/depends/common/png/png.sha256 b/depends/common/png/png.sha256
+deleted file mode 100644
+index 366f0b5..0000000
+--- a/depends/common/png/png.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-81bfc8f16ed125622c0c5ad44eeffda19e7a7c7e32f47e43c8932bf32deae7cc
+diff --git a/depends/common/png/png.txt b/depends/common/png/png.txt
+deleted file mode 100644
+index 298e647..0000000
+--- a/depends/common/png/png.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-png http://mirrors.xbmc.org/build-deps/sources/libpng-1.6.26.tar.gz
+diff --git a/depends/common/tiff/CMakeLists.txt b/depends/common/tiff/CMakeLists.txt
+deleted file mode 100644
+index 286e736..0000000
+--- a/depends/common/tiff/CMakeLists.txt
++++ /dev/null
+@@ -1,14 +0,0 @@
+-cmake_minimum_required(VERSION 3.3)
+-
+-project(tiff)
+-
+-include(ExternalProject)
+-
+-externalproject_add(tiff
+-  SOURCE_DIR ${CMAKE_SOURCE_DIR}
+-  UPDATE_COMMAND autoreconf -vif
+-  CONFIGURE_COMMAND CC=${CMAKE_C_COMPILER} AR=${CMAKE_AR} ${CMAKE_SOURCE_DIR}/configure --prefix=${OUTPUT_DIR} --disable-shared --with-pic
+-  INSTALL_COMMAND ""
+-  BUILD_IN_SOURCE 1)
+-
+-install(CODE "execute_process(COMMAND make install WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})")
+diff --git a/depends/common/tiff/tiff.sha256 b/depends/common/tiff/tiff.sha256
+deleted file mode 100644
+index b6ec457..0000000
+--- a/depends/common/tiff/tiff.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-f5d64dd4ce61c55f5e9f6dc3920fbe5a41e02c2e607da7117a35eb5c320cef6a
+diff --git a/depends/common/tiff/tiff.txt b/depends/common/tiff/tiff.txt
+deleted file mode 100644
+index 88e4d59..0000000
+--- a/depends/common/tiff/tiff.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-tiff http://mirrors.xbmc.org/build-deps/sources/tiff-3.9.7.tar.gz
+diff --git a/depends/common/zlib/01-build-static.patch b/depends/common/zlib/01-build-static.patch
+deleted file mode 100644
+index 8cc3cfc..0000000
+--- a/depends/common/zlib/01-build-static.patch
++++ /dev/null
+@@ -1,36 +0,0 @@
+---- a/CMakeLists.txt
+-+++ b/CMakeLists.txt
+-@@ -183,10 +183,11 @@
+-     set(ZLIB_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
+- endif(MINGW)
+- 
+--add_library(zlib SHARED ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_DLL_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+--add_library(zlibstatic STATIC ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+--set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
+--set_target_properties(zlib PROPERTIES SOVERSION 1)
+-+add_library(zlib ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_DLL_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+-+if(BUILD_SHARED_LIBS)
+-+    set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
+-+    set_target_properties(zlib PROPERTIES SOVERSION 1)
+-+endif()
+- 
+- if(NOT CYGWIN)
+-     # This property causes shared libraries on Linux to have the full version
+-@@ -201,7 +202,7 @@
+- 
+- if(UNIX)
+-     # On unix-like platforms the library is almost always called libz
+--   set_target_properties(zlib zlibstatic PROPERTIES OUTPUT_NAME z)
+-+   set_target_properties(zlib PROPERTIES OUTPUT_NAME z)
+-    if(NOT APPLE)
+-      set_target_properties(zlib PROPERTIES LINK_FLAGS "-Wl,--version-script,\"${CMAKE_CURRENT_SOURCE_DIR}/zlib.map\"")
+-    endif()
+-@@ -211,7 +212,7 @@
+- endif()
+- 
+- if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
+--    install(TARGETS zlib zlibstatic
+-+    install(TARGETS zlib
+-         RUNTIME DESTINATION "${INSTALL_BIN_DIR}"
+-         ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"
+-         LIBRARY DESTINATION "${INSTALL_LIB_DIR}" )
+diff --git a/depends/common/zlib/zlib.sha256 b/depends/common/zlib/zlib.sha256
+deleted file mode 100644
+index ec1ba07..0000000
+--- a/depends/common/zlib/zlib.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
+diff --git a/depends/common/zlib/zlib.txt b/depends/common/zlib/zlib.txt
+deleted file mode 100644
+index 4bf3645..0000000
+--- a/depends/common/zlib/zlib.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-zlib http://mirrors.kodi.tv/build-deps/sources/zlib-1.2.11.tar.gz
+diff --git a/depends/osx/glm/glm.sha256 b/depends/osx/glm/glm.sha256
+index a2281e4..7339f4f 100644
+--- a/depends/osx/glm/glm.sha256
++++ b/depends/osx/glm/glm.sha256
+@@ -1 +1 @@
+-7f093f11c49877716bab96813c2e834db6839095281c8c0c65c60c8bdb9504a3
++fba9fd177073a36c5a7798c74b28e79ba6deb8f4bb0d2dbfc0e207c27da7e12c
+diff --git a/depends/osx/glm/glm.txt b/depends/osx/glm/glm.txt
+index eeb544e..090db8c 100644
+--- a/depends/osx/glm/glm.txt
++++ b/depends/osx/glm/glm.txt
+@@ -1 +1 @@
+-glm https://github.com/g-truc/glm/archive/47031aa4b7b079716e4cac496819e7f464b6a713.tar.gz
++glm https://github.com/g-truc/glm/archive/0.9.9.3.tar.gz
+diff --git a/lib/ImageMagick/CMakeLists.txt b/lib/ImageMagick/CMakeLists.txt
+deleted file mode 100644
+index c18de6c..0000000
+--- a/lib/ImageMagick/CMakeLists.txt
++++ /dev/null
+@@ -1,63 +0,0 @@
+-project(ImageMagick)
+-
+-cmake_minimum_required(VERSION 3.3)
+-
+-find_package(JPEG REQUIRED)
+-find_package(TIFF REQUIRED)
+-find_package(PNG REQUIRED)
+-find_package(LTDL)
+-
+-include_directories(${LTDL_INCLUDE_DIRS} ${JPEG_INCLUDE_DIRS} ${PNG_INCLUDE_DIR} ${TIFF_INCLUDE_DIR})
+-
+-# Force on travis where only Ubuntu 16.04 Xenial is available the use of gcc
+-# on Image Magick, otherwise brings it configure errors!
+-if(DEFINED ENV{TRAVIS_COMPILER})
+-  if($ENV{TRAVIS_COMPILER} STREQUAL "clang")
+-    set(OVERRIDE_COMPILER CC=gcc CXX=g++)
+-  endif()
+-endif()
+-
+-file(READ "${CMAKE_SOURCE_DIR}/depends/common/imagemagick/imagemagick.txt" url)
+-separate_arguments(url)
+-list(GET url 1 url)
+-file(READ "${CMAKE_SOURCE_DIR}/depends/common/imagemagick/imagemagick.sha256" sha256)
+-separate_arguments(sha256)
+-string(STRIP ${sha256} sha256)
+-
+-include(ExternalProject)
+-ExternalProject_Add(ImageMagick
+-                    URL ${url}
+-                    URL_HASH SHA256=${sha256}
+-                    UPDATE_COMMAND ""
+-                    CONFIGURE_COMMAND ${OVERRIDE_COMPILER} <SOURCE_DIR>/configure
+-                      --prefix=${OUTPUT_DIR}
+-                      --enable-static
+-                      --disable-shared
+-                      --disable-opencl
+-                      --with-pic
+-                      --without-x
+-                      --without-magick-plus-plus
+-                      --without-openexr
+-                      --without-openjp2
+-                      --without-pango
+-                      --without-fftw
+-                      --without-fontconfig
+-                      --without-freetype
+-                      --without-djvu
+-                      --without-lcms
+-                      --without-jbig
+-                      --without-lqr
+-                      --without-bzlib
+-                      --without-lzma
+-                      --without-webp
+-                      --without-xml
+-                      --without-gvc
+-                    INSTALL_COMMAND ""
+-                    BUILD_IN_SOURCE 1)
+-
+-ExternalProject_Get_Property(ImageMagick source_dir)
+-
+-set(ImageMagick_INCLUDE_DIRS ${source_dir} CACHE INTERNAL "")
+-set(ImageMagick_LIBRARIES ${source_dir}/magick/.libs/libMagickCore-6.Q16.a
+-                           ${source_dir}/wand/.libs/libMagickWand-6.Q16.a
+-                           CACHE INTERNAL "")
+diff --git a/src/biof/CMakeLists.txt b/src/biof/CMakeLists.txt
+index 62bb895..810bec4 100644
+--- a/src/biof/CMakeLists.txt
++++ b/src/biof/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.biof)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/busyspheres/CMakeLists.txt b/src/busyspheres/CMakeLists.txt
+index 1688bb8..41650ca 100644
+--- a/src/busyspheres/CMakeLists.txt
++++ b/src/busyspheres/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.busyspheres)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/colorfire/CMakeLists.txt b/src/colorfire/CMakeLists.txt
+index fa34bdc..ec8cd44 100644
+--- a/src/colorfire/CMakeLists.txt
++++ b/src/colorfire/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.colorfire)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/cyclone/CMakeLists.txt b/src/cyclone/CMakeLists.txt
+index 198998b..8af4172 100644
+--- a/src/cyclone/CMakeLists.txt
++++ b/src/cyclone/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.cyclone)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/drempels/CMakeLists.txt b/src/drempels/CMakeLists.txt
+index 8cdf8e5..1ebd427 100644
+--- a/src/drempels/CMakeLists.txt
++++ b/src/drempels/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.drempels)
+ 
+-cmake_minimum_required(VERSION 3.3)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+@@ -19,19 +16,8 @@ set(DREMPELS_SOURCES ${CMAKE_CURRENT_LIST_DIR}/main.cpp
+ set(DREMPELS_HEADERS ${CMAKE_CURRENT_LIST_DIR}/main.h
+                      ${CMAKE_CURRENT_LIST_DIR}/gpoly.h
+                      ${CMAKE_CURRENT_LIST_DIR}/noise1234.h
++                     ${CMAKE_CURRENT_LIST_DIR}/stb_image.h
++                     ${CMAKE_CURRENT_LIST_DIR}/stb_image_resize.h
+                      ${CMAKE_CURRENT_LIST_DIR}/TexMgr.h)
+ 
+-set(ADDON_DEPENDS ImageMagick)
+-include_directories(${ImageMagick_INCLUDE_DIRS})
+-set(DREMPELS_DEPLIBS ${DEPLIBS}
+-                     ${ImageMagick_LIBRARIES}
+-                     ${JPEG_LIBRARIES}
+-                     ${PNG_LIBRARIES}
+-                     ${TIFF_LIBRARIES}
+-                     ${LTDL_LIBRARIES})
+-
+-build_addon(screensaver.rsxs.drempels DREMPELS DREMPELS_DEPLIBS)
+-if(NOT ImageMagick_FOUND)
+-  # Force build of own if ImageMagick is not present
+-  add_dependencies(screensaver.rsxs.drempels ImageMagick)
+-endif()
++build_addon(screensaver.rsxs.drempels DREMPELS DEPLIBS)
+diff --git a/src/drempels/TexMgr.cpp b/src/drempels/TexMgr.cpp
+index 62e899c..2160935 100644
+--- a/src/drempels/TexMgr.cpp
++++ b/src/drempels/TexMgr.cpp
+@@ -28,17 +28,19 @@
+ #endif
+ #include <cstdlib>
+ 
+-#include <magick/api.h>
+-#include <wand/magick-wand.h>
+ #include <dirent.h>
+ #include <sys/types.h>
+ #include <sys/stat.h>
+ #include <time.h>
+ #include <unistd.h>
+ #include <kodi/General.h>
++#include <Rgbhsl/Rgbhsl.h>
+ 
+ #include "noise1234.h"
+-#include <Rgbhsl/Rgbhsl.h>
++#define STB_IMAGE_IMPLEMENTATION
++#include "stb_image.h"
++#define STB_IMAGE_RESIZE_IMPLEMENTATION
++#include "stb_image_resize.h"
+ 
+ using namespace std;
+ 
+@@ -124,8 +126,8 @@ bool TexMgr::getNext()
+       ok = true;
+ 
+       {
+-        unsigned int *tmp = prevTex;
+-        unsigned int tmpW = prevW, tmpH = prevH;
++        uint32_t *tmp = prevTex;
++        uint32_t tmpW = prevW, tmpH = prevH;
+ 
+         prevTex = curTex;
+         prevW = curW; prevH = curH;
+@@ -154,7 +156,7 @@ void TexMgr::genTex()
+   if ((nextTex == nullptr) || (gw > nextW) || (gh > nextH))
+   {
+     delete [] nextTex;
+-    nextTex = new unsigned int[gw * gh];
++    nextTex = new uint32_t[gw * gh];
+     nextW = gw;
+     nextH = gh;
+   }
+@@ -202,7 +204,7 @@ void TexMgr::genTex()
+ 
+       hsl2rgb(h, s, l, r, g, b);
+ 
+-      nextTex[uu++] = 0xff000000 + (unsigned int)(r * 255) + ((unsigned int)(g * 255) << 8) + ((unsigned int)(b * 255) << 16);
++      nextTex[uu++] = 0xff000000 + (uint32_t)(r * 255) + ((uint32_t)(g * 255) << 8) + ((uint32_t)(b * 255) << 16);
+     }
+   }
+ 
+@@ -236,18 +238,19 @@ static unsigned int computeDesiredSize(const unsigned int input, const int desir
+ // Directory scanning + image loading code in a separate function callable either from loadNextImage or another thread if pthreads is available.
+ void TexMgr::loadNextImageFromDisk()
+ {
+-  MagickWand *magick_wand = NewMagickWand();
+-  ExceptionInfo exception;
+   int dirLoop = 0;
++  bool imageLoaded = false;
++  int width, height, channels;
++  unsigned char *image = nullptr;
+ 
+-  GetExceptionInfo (&exception);
+-
+-  int imageLoaded = 0;
+-  do {
++  do 
++  {
+     struct dirent *file;
+ 
+-    if (!imageDir) {
+-      if (dirLoop) {
++    if (!imageDir) 
++    {
++      if (dirLoop) 
++      {
+         dirName = "";
+         return;
+       }
+@@ -257,52 +260,58 @@ void TexMgr::loadNextImageFromDisk()
+     }
+ 
+     file = readdir (imageDir);
+-    if (file) {
++    if (file) 
++    {
+       struct stat fileStat;
+       string full_path_and_name = dirName + "/" + file->d_name;
+ 
+-      if (!stat(full_path_and_name.c_str(), (struct stat *)&fileStat)) {
+-        if (S_ISREG(fileStat.st_mode)) {
+-          if (MagickReadImage(magick_wand, full_path_and_name.c_str ()) == MagickFalse) {
+-            char *description;
+-            ExceptionType severity;
+-
+-            description = MagickGetException(magick_wand, &severity);
+-            kodi::Log(ADDON_LOG_ERROR, "Error loading %s: %s", full_path_and_name.c_str(), description);
+-            description = (char *)MagickRelinquishMemory (description);
+-          } else {
+-            imageLoaded = 1;
+-          }
++      if (!stat(full_path_and_name.c_str(), (struct stat *)&fileStat)) 
++      {
++        if (S_ISREG(fileStat.st_mode)) 
++        {
++          image = stbi_load(full_path_and_name.c_str(),
++                            &width,
++                            &height,
++                            &channels,
++                            STBI_rgb_alpha);
++
++          if (!image) 
++            kodi::Log(ADDON_LOG_ERROR, "Error loading %s: %s", full_path_and_name.c_str(), stbi_failure_reason());
++          else 
++            imageLoaded = true;
+         }
+       }
+-    } else {
++    } 
++    else 
++    {
+       closedir(imageDir);
+       imageDir = nullptr;
+     }
+   } while (!imageLoaded);
+ 
+-  const unsigned int iww = MagickGetImageWidth (magick_wand);
+-  const unsigned int ihh = MagickGetImageHeight (magick_wand);
+-  const unsigned int oww = computeDesiredSize(iww, tw);
+-  const unsigned int ohh = computeDesiredSize(ihh, th);
+ 
+-  if ((iww != oww) || (ihh != ohh))
++  if (image)
+   {
+-    MagickScaleImage (magick_wand, oww, ohh);
+-  }
++    const uint32_t oww = computeDesiredSize(width, tw);
++    const uint32_t ohh = computeDesiredSize(height, th);
++  
++    if ((width != oww) || (height != ohh))
++    {
++      stbir_resize_uint8(image, width, height, 0, image, oww, ohh, 0, STBI_rgb_alpha);
++    }
+ 
+-  if ((nextTex == nullptr) || (oww > nextW) || (ohh > nextH))
+-  {
+-    delete [] nextTex;
+-    nextTex = new unsigned int[oww * ohh];
+-    nextW = oww;
+-    nextH = ohh;
++    if ((nextTex == nullptr) || (oww > nextW) || (ohh > nextH))
++    {
++      delete [] nextTex;
++      nextTex = new uint32_t[oww * ohh];
++      nextW = oww;
++      nextH = ohh;
++    }
++    
++    memcpy(nextTex, image, oww * ohh * sizeof(uint32_t));
++    stbi_image_free(image);
+   }
+ 
+-  ExportImagePixels (GetImageFromMagickWand(magick_wand), 0, 0, oww, ohh, "RGBA", CharPixel, nextTex, &exception);
+-
+-  magick_wand = DestroyMagickWand (magick_wand);
+-
+   ready = true;
+ }
+ 
+@@ -331,4 +340,3 @@ void *TexMgr::imageThreadMain(void *vp)
+ 
+   return nullptr;
+ }
+-
+diff --git a/src/drempels/stb_image.h b/src/drempels/stb_image.h
+new file mode 100644
+index 0000000..a6202a3
+--- /dev/null
++++ b/src/drempels/stb_image.h
+@@ -0,0 +1,7547 @@
++/* stb_image - v2.22 - public domain image loader - http://nothings.org/stb
++                                  no warranty implied; use at your own risk
++
++   Do this:
++      #define STB_IMAGE_IMPLEMENTATION
++   before you include this file in *one* C or C++ file to create the implementation.
++
++   // i.e. it should look like this:
++   #include ...
++   #include ...
++   #include ...
++   #define STB_IMAGE_IMPLEMENTATION
++   #include "stb_image.h"
++
++   You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
++   And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free
++
++
++   QUICK NOTES:
++      Primarily of interest to game developers and other people who can
++          avoid problematic images and only need the trivial interface
++
++      JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib)
++      PNG 1/2/4/8/16-bit-per-channel
++
++      TGA (not sure what subset, if a subset)
++      BMP non-1bpp, non-RLE
++      PSD (composited view only, no extra channels, 8/16 bit-per-channel)
++
++      GIF (*comp always reports as 4-channel)
++      HDR (radiance rgbE format)
++      PIC (Softimage PIC)
++      PNM (PPM and PGM binary only)
++
++      Animated GIF still needs a proper API, but here's one way to do it:
++          http://gist.github.com/urraka/685d9a6340b26b830d49
++
++      - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
++      - decode from arbitrary I/O callbacks
++      - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
++
++   Full documentation under "DOCUMENTATION" below.
++
++
++LICENSE
++
++  See end of file for license information.
++
++RECENT REVISION HISTORY:
++
++      2.22  (2019-03-04) gif fixes, fix warnings
++      2.21  (2019-02-25) fix typo in comment
++      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs 
++      2.19  (2018-02-11) fix warning
++      2.18  (2018-01-30) fix warnings
++      2.17  (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings
++      2.16  (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes
++      2.15  (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC
++      2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
++      2.13  (2016-12-04) experimental 16-bit API, only for PNG so far; fixes
++      2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
++      2.11  (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64
++                         RGB-format JPEG; remove white matting in PSD;
++                         allocate large structures on the stack;
++                         correct channel count for PNG & BMP
++      2.10  (2016-01-22) avoid warning introduced in 2.09
++      2.09  (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
++
++   See end of file for full revision history.
++
++
++ ============================    Contributors    =========================
++
++ Image formats                          Extensions, features
++    Sean Barrett (jpeg, png, bmp)          Jetro Lauha (stbi_info)
++    Nicolas Schulz (hdr, psd)              Martin "SpartanJ" Golini (stbi_info)
++    Jonathan Dummer (tga)                  James "moose2000" Brown (iPhone PNG)
++    Jean-Marc Lienher (gif)                Ben "Disch" Wenger (io callbacks)
++    Tom Seddon (pic)                       Omar Cornut (1/2/4-bit PNG)
++    Thatcher Ulrich (psd)                  Nicolas Guillemot (vertical flip)
++    Ken Miller (pgm, ppm)                  Richard Mitton (16-bit PSD)
++    github:urraka (animated gif)           Junggon Kim (PNM comments)
++    Christopher Forseth (animated gif)     Daniel Gibson (16-bit TGA)
++                                           socks-the-fox (16-bit PNG)
++                                           Jeremy Sawicki (handle all ImageNet JPGs)
++ Optimizations & bugfixes                  Mikhail Morozov (1-bit BMP)
++    Fabian "ryg" Giesen                    Anael Seghezzi (is-16-bit query)
++    Arseny Kapoulkine
++    John-Mark Allen
++    Carmelo J Fdez-Aguera
++
++ Bug & warning fixes
++    Marc LeBlanc            David Woo          Guillaume George   Martins Mozeiko
++    Christpher Lloyd        Jerry Jansson      Joseph Thomson     Phil Jordan
++    Dave Moore              Roy Eltham         Hayaki Saito       Nathan Reed
++    Won Chun                Luke Graham        Johan Duparc       Nick Verigakis
++    the Horde3D community   Thomas Ruf         Ronny Chevalier    github:rlyeh
++    Janez Zemva             John Bartholomew   Michal Cichon      github:romigrou
++    Jonathan Blow           Ken Hamada         Tero Hanninen      github:svdijk
++    Laurent Gomila          Cort Stratton      Sergio Gonzalez    github:snagar
++    Aruelien Pocheville     Thibault Reuille   Cass Everitt       github:Zelex
++    Ryamond Barbiero        Paul Du Bois       Engin Manap        github:grim210
++    Aldo Culquicondor       Philipp Wiesemann  Dale Weiler        github:sammyhw
++    Oriol Ferrer Mesia      Josh Tobin         Matthew Gregan     github:phprus
++    Julian Raschke          Gregory Mullen     Baldur Karlsson    github:poppolopoppo
++    Christian Floisand      Kevin Schmidt      JR Smith           github:darealshinji
++    Blazej Dariusz Roszkowski                                     github:Michaelangel007
++*/
++
++#ifndef STBI_INCLUDE_STB_IMAGE_H
++#define STBI_INCLUDE_STB_IMAGE_H
++
++// DOCUMENTATION
++//
++// Limitations:
++//    - no 12-bit-per-channel JPEG
++//    - no JPEGs with arithmetic coding
++//    - GIF always returns *comp=4
++//
++// Basic usage (see HDR discussion below for HDR usage):
++//    int x,y,n;
++//    unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
++//    // ... process data if not NULL ...
++//    // ... x = width, y = height, n = # 8-bit components per pixel ...
++//    // ... replace '0' with '1'..'4' to force that many components per pixel
++//    // ... but 'n' will always be the number that it would have been if you said 0
++//    stbi_image_free(data)
++//
++// Standard parameters:
++//    int *x                 -- outputs image width in pixels
++//    int *y                 -- outputs image height in pixels
++//    int *channels_in_file  -- outputs # of image components in image file
++//    int desired_channels   -- if non-zero, # of image components requested in result
++//
++// The return value from an image loader is an 'unsigned char *' which points
++// to the pixel data, or NULL on an allocation failure or if the image is
++// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels,
++// with each pixel consisting of N interleaved 8-bit components; the first
++// pixel pointed to is top-left-most in the image. There is no padding between
++// image scanlines or between pixels, regardless of format. The number of
++// components N is 'desired_channels' if desired_channels is non-zero, or
++// *channels_in_file otherwise. If desired_channels is non-zero,
++// *channels_in_file has the number of components that _would_ have been
++// output otherwise. E.g. if you set desired_channels to 4, you will always
++// get RGBA output, but you can check *channels_in_file to see if it's trivially
++// opaque because e.g. there were only 3 channels in the source image.
++//
++// An output image with N components has the following components interleaved
++// in this order in each pixel:
++//
++//     N=#comp     components
++//       1           grey
++//       2           grey, alpha
++//       3           red, green, blue
++//       4           red, green, blue, alpha
++//
++// If image loading fails for any reason, the return value will be NULL,
++// and *x, *y, *channels_in_file will be unchanged. The function
++// stbi_failure_reason() can be queried for an extremely brief, end-user
++// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS
++// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly
++// more user-friendly ones.
++//
++// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
++//
++// ===========================================================================
++//
++// UNICODE:
++//
++//   If compiling for Windows and you wish to use Unicode filenames, compile
++//   with
++//       #define STBI_WINDOWS_UTF8
++//   and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert
++//   Windows wchar_t filenames to utf8.
++//
++// ===========================================================================
++//
++// Philosophy
++//
++// stb libraries are designed with the following priorities:
++//
++//    1. easy to use
++//    2. easy to maintain
++//    3. good performance
++//
++// Sometimes I let "good performance" creep up in priority over "easy to maintain",
++// and for best performance I may provide less-easy-to-use APIs that give higher
++// performance, in addition to the easy-to-use ones. Nevertheless, it's important
++// to keep in mind that from the standpoint of you, a client of this library,
++// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all.
++//
++// Some secondary priorities arise directly from the first two, some of which
++// provide more explicit reasons why performance can't be emphasized.
++//
++//    - Portable ("ease of use")
++//    - Small source code footprint ("easy to maintain")
++//    - No dependencies ("ease of use")
++//
++// ===========================================================================
++//
++// I/O callbacks
++//
++// I/O callbacks allow you to read from arbitrary sources, like packaged
++// files or some other source. Data read from callbacks are processed
++// through a small internal buffer (currently 128 bytes) to try to reduce
++// overhead.
++//
++// The three functions you must define are "read" (reads some bytes of data),
++// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end).
++//
++// ===========================================================================
++//
++// SIMD support
++//
++// The JPEG decoder will try to automatically use SIMD kernels on x86 when
++// supported by the compiler. For ARM Neon support, you must explicitly
++// request it.
++//
++// (The old do-it-yourself SIMD API is no longer supported in the current
++// code.)
++//
++// On x86, SSE2 will automatically be used when available based on a run-time
++// test; if not, the generic C versions are used as a fall-back. On ARM targets,
++// the typical path is to have separate builds for NEON and non-NEON devices
++// (at least this is true for iOS and Android). Therefore, the NEON support is
++// toggled by a build flag: define STBI_NEON to get NEON loops.
++//
++// If for some reason you do not want to use any of SIMD code, or if
++// you have issues compiling it, you can disable it entirely by
++// defining STBI_NO_SIMD.
++//
++// ===========================================================================
++//
++// HDR image support   (disable by defining STBI_NO_HDR)
++//
++// stb_image supports loading HDR images in general, and currently the Radiance
++// .HDR file format specifically. You can still load any file through the existing
++// interface; if you attempt to load an HDR file, it will be automatically remapped
++// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;
++// both of these constants can be reconfigured through this interface:
++//
++//     stbi_hdr_to_ldr_gamma(2.2f);
++//     stbi_hdr_to_ldr_scale(1.0f);
++//
++// (note, do not use _inverse_ constants; stbi_image will invert them
++// appropriately).
++//
++// Additionally, there is a new, parallel interface for loading files as
++// (linear) floats to preserve the full dynamic range:
++//
++//    float *data = stbi_loadf(filename, &x, &y, &n, 0);
++//
++// If you load LDR images through this interface, those images will
++// be promoted to floating point values, run through the inverse of
++// constants corresponding to the above:
++//
++//     stbi_ldr_to_hdr_scale(1.0f);
++//     stbi_ldr_to_hdr_gamma(2.2f);
++//
++// Finally, given a filename (or an open file or memory block--see header
++// file for details) containing image data, you can query for the "most
++// appropriate" interface to use (that is, whether the image is HDR or
++// not), using:
++//
++//     stbi_is_hdr(char *filename);
++//
++// ===========================================================================
++//
++// iPhone PNG support:
++//
++// By default we convert iphone-formatted PNGs back to RGB, even though
++// they are internally encoded differently. You can disable this conversion
++// by calling stbi_convert_iphone_png_to_rgb(0), in which case
++// you will always just get the native iphone "format" through (which
++// is BGR stored in RGB).
++//
++// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
++// pixel to remove any premultiplied alpha *only* if the image file explicitly
++// says there's premultiplied data (currently only happens in iPhone images,
++// and only if iPhone convert-to-rgb processing is on).
++//
++// ===========================================================================
++//
++// ADDITIONAL CONFIGURATION
++//
++//  - You can suppress implementation of any of the decoders to reduce
++//    your code footprint by #defining one or more of the following
++//    symbols before creating the implementation.
++//
++//        STBI_NO_JPEG
++//        STBI_NO_PNG
++//        STBI_NO_BMP
++//        STBI_NO_PSD
++//        STBI_NO_TGA
++//        STBI_NO_GIF
++//        STBI_NO_HDR
++//        STBI_NO_PIC
++//        STBI_NO_PNM   (.ppm and .pgm)
++//
++//  - You can request *only* certain decoders and suppress all other ones
++//    (this will be more forward-compatible, as addition of new decoders
++//    doesn't require you to disable them explicitly):
++//
++//        STBI_ONLY_JPEG
++//        STBI_ONLY_PNG
++//        STBI_ONLY_BMP
++//        STBI_ONLY_PSD
++//        STBI_ONLY_TGA
++//        STBI_ONLY_GIF
++//        STBI_ONLY_HDR
++//        STBI_ONLY_PIC
++//        STBI_ONLY_PNM   (.ppm and .pgm)
++//
++//   - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
++//     want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
++//
++
++
++#ifndef STBI_NO_STDIO
++#include <stdio.h>
++#endif // STBI_NO_STDIO
++
++#define STBI_VERSION 1
++
++enum
++{
++   STBI_default = 0, // only used for desired_channels
++
++   STBI_grey       = 1,
++   STBI_grey_alpha = 2,
++   STBI_rgb        = 3,
++   STBI_rgb_alpha  = 4
++};
++
++#include <stdlib.h>
++typedef unsigned char stbi_uc;
++typedef unsigned short stbi_us;
++
++#ifdef __cplusplus
++extern "C" {
++#endif
++
++#ifndef STBIDEF
++#ifdef STB_IMAGE_STATIC
++#define STBIDEF static
++#else
++#define STBIDEF extern
++#endif
++#endif
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// PRIMARY API - works on images of any type
++//
++
++//
++// load image by filename, open file, or memory buffer
++//
++
++typedef struct
++{
++   int      (*read)  (void *user,char *data,int size);   // fill 'data' with 'size' bytes.  return number of bytes actually read
++   void     (*skip)  (void *user,int n);                 // skip the next 'n' bytes, or 'unget' the last -n bytes if negative
++   int      (*eof)   (void *user);                       // returns nonzero if we are at end of file/data
++} stbi_io_callbacks;
++
++////////////////////////////////////
++//
++// 8-bits-per-channel interface
++//
++
++STBIDEF stbi_uc *stbi_load_from_memory   (stbi_uc           const *buffer, int len   , int *x, int *y, int *channels_in_file, int desired_channels);
++STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk  , void *user, int *x, int *y, int *channels_in_file, int desired_channels);
++
++#ifndef STBI_NO_STDIO
++STBIDEF stbi_uc *stbi_load            (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
++STBIDEF stbi_uc *stbi_load_from_file  (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
++// for stbi_load_from_file, file pointer is left pointing immediately after image
++#endif
++
++#ifndef STBI_NO_GIF
++STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
++#endif
++
++#ifdef STBI_WINDOWS_UTF8
++STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input);
++#endif
++
++////////////////////////////////////
++//
++// 16-bits-per-channel interface
++//
++
++STBIDEF stbi_us *stbi_load_16_from_memory   (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
++STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels);
++
++#ifndef STBI_NO_STDIO
++STBIDEF stbi_us *stbi_load_16          (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
++STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
++#endif
++
++////////////////////////////////////
++//
++// float-per-channel interface
++//
++#ifndef STBI_NO_LINEAR
++   STBIDEF float *stbi_loadf_from_memory     (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
++   STBIDEF float *stbi_loadf_from_callbacks  (stbi_io_callbacks const *clbk, void *user, int *x, int *y,  int *channels_in_file, int desired_channels);
++
++   #ifndef STBI_NO_STDIO
++   STBIDEF float *stbi_loadf            (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
++   STBIDEF float *stbi_loadf_from_file  (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
++   #endif
++#endif
++
++#ifndef STBI_NO_HDR
++   STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma);
++   STBIDEF void   stbi_hdr_to_ldr_scale(float scale);
++#endif // STBI_NO_HDR
++
++#ifndef STBI_NO_LINEAR
++   STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma);
++   STBIDEF void   stbi_ldr_to_hdr_scale(float scale);
++#endif // STBI_NO_LINEAR
++
++// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR
++STBIDEF int    stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user);
++STBIDEF int    stbi_is_hdr_from_memory(stbi_uc const *buffer, int len);
++#ifndef STBI_NO_STDIO
++STBIDEF int      stbi_is_hdr          (char const *filename);
++STBIDEF int      stbi_is_hdr_from_file(FILE *f);
++#endif // STBI_NO_STDIO
++
++
++// get a VERY brief reason for failure
++// NOT THREADSAFE
++STBIDEF const char *stbi_failure_reason  (void);
++
++// free the loaded image -- this is just free()
++STBIDEF void     stbi_image_free      (void *retval_from_stbi_load);
++
++// get image dimensions & components without fully decoding
++STBIDEF int      stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);
++STBIDEF int      stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp);
++STBIDEF int      stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len);
++STBIDEF int      stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user);
++
++#ifndef STBI_NO_STDIO
++STBIDEF int      stbi_info               (char const *filename,     int *x, int *y, int *comp);
++STBIDEF int      stbi_info_from_file     (FILE *f,                  int *x, int *y, int *comp);
++STBIDEF int      stbi_is_16_bit          (char const *filename);
++STBIDEF int      stbi_is_16_bit_from_file(FILE *f);
++#endif
++
++
++
++// for image formats that explicitly notate that they have premultiplied alpha,
++// we just return the colors as stored in the file. set this flag to force
++// unpremultiplication. results are undefined if the unpremultiply overflow.
++STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
++
++// indicate whether we should process iphone images back to canonical format,
++// or just pass them through "as-is"
++STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
++
++// flip the image vertically, so the first pixel in the output array is the bottom left
++STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
++
++// ZLIB client - used by PNG, available for other purposes
++
++STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen);
++STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header);
++STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen);
++STBIDEF int   stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
++
++STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen);
++STBIDEF int   stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
++
++
++#ifdef __cplusplus
++}
++#endif
++
++//
++//
++////   end header file   /////////////////////////////////////////////////////
++#endif // STBI_INCLUDE_STB_IMAGE_H
++
++#ifdef STB_IMAGE_IMPLEMENTATION
++
++#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \
++  || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \
++  || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \
++  || defined(STBI_ONLY_ZLIB)
++   #ifndef STBI_ONLY_JPEG
++   #define STBI_NO_JPEG
++   #endif
++   #ifndef STBI_ONLY_PNG
++   #define STBI_NO_PNG
++   #endif
++   #ifndef STBI_ONLY_BMP
++   #define STBI_NO_BMP
++   #endif
++   #ifndef STBI_ONLY_PSD
++   #define STBI_NO_PSD
++   #endif
++   #ifndef STBI_ONLY_TGA
++   #define STBI_NO_TGA
++   #endif
++   #ifndef STBI_ONLY_GIF
++   #define STBI_NO_GIF
++   #endif
++   #ifndef STBI_ONLY_HDR
++   #define STBI_NO_HDR
++   #endif
++   #ifndef STBI_ONLY_PIC
++   #define STBI_NO_PIC
++   #endif
++   #ifndef STBI_ONLY_PNM
++   #define STBI_NO_PNM
++   #endif
++#endif
++
++#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB)
++#define STBI_NO_ZLIB
++#endif
++
++
++#include <stdarg.h>
++#include <stddef.h> // ptrdiff_t on osx
++#include <stdlib.h>
++#include <string.h>
++#include <limits.h>
++
++#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
++#include <math.h>  // ldexp, pow
++#endif
++
++#ifndef STBI_NO_STDIO
++#include <stdio.h>
++#endif
++
++#ifndef STBI_ASSERT
++#include <assert.h>
++#define STBI_ASSERT(x) assert(x)
++#endif
++
++#ifdef __cplusplus
++#define STBI_EXTERN extern "C"
++#else
++#define STBI_EXTERN extern
++#endif
++
++
++#ifndef _MSC_VER
++   #ifdef __cplusplus
++   #define stbi_inline inline
++   #else
++   #define stbi_inline
++   #endif
++#else
++   #define stbi_inline __forceinline
++#endif
++
++
++#ifdef _MSC_VER
++typedef unsigned short stbi__uint16;
++typedef   signed short stbi__int16;
++typedef unsigned int   stbi__uint32;
++typedef   signed int   stbi__int32;
++#else
++#include <stdint.h>
++typedef uint16_t stbi__uint16;
++typedef int16_t  stbi__int16;
++typedef uint32_t stbi__uint32;
++typedef int32_t  stbi__int32;
++#endif
++
++// should produce compiler error if size is wrong
++typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
++
++#ifdef _MSC_VER
++#define STBI_NOTUSED(v)  (void)(v)
++#else
++#define STBI_NOTUSED(v)  (void)sizeof(v)
++#endif
++
++#ifdef _MSC_VER
++#define STBI_HAS_LROTL
++#endif
++
++#ifdef STBI_HAS_LROTL
++   #define stbi_lrot(x,y)  _lrotl(x,y)
++#else
++   #define stbi_lrot(x,y)  (((x) << (y)) | ((x) >> (32 - (y))))
++#endif
++
++#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
++// ok
++#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED)
++// ok
++#else
++#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)."
++#endif
++
++#ifndef STBI_MALLOC
++#define STBI_MALLOC(sz)           malloc(sz)
++#define STBI_REALLOC(p,newsz)     realloc(p,newsz)
++#define STBI_FREE(p)              free(p)
++#endif
++
++#ifndef STBI_REALLOC_SIZED
++#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz)
++#endif
++
++// x86/x64 detection
++#if defined(__x86_64__) || defined(_M_X64)
++#define STBI__X64_TARGET
++#elif defined(__i386) || defined(_M_IX86)
++#define STBI__X86_TARGET
++#endif
++
++#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD)
++// gcc doesn't support sse2 intrinsics unless you compile with -msse2,
++// which in turn means it gets to use SSE2 everywhere. This is unfortunate,
++// but previous attempts to provide the SSE2 functions with runtime
++// detection caused numerous issues. The way architecture extensions are
++// exposed in GCC/Clang is, sadly, not really suited for one-file libs.
++// New behavior: if compiled with -msse2, we use SSE2 without any
++// detection; if not, we don't use it at all.
++#define STBI_NO_SIMD
++#endif
++
++#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD)
++// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET
++//
++// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the
++// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant.
++// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not
++// simultaneously enabling "-mstackrealign".
++//
++// See https://github.com/nothings/stb/issues/81 for more information.
++//
++// So default to no SSE2 on 32-bit MinGW. If you've read this far and added
++// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2.
++#define STBI_NO_SIMD
++#endif
++
++#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET))
++#define STBI_SSE2
++#include <emmintrin.h>
++
++#ifdef _MSC_VER
++
++#if _MSC_VER >= 1400  // not VC6
++#include <intrin.h> // __cpuid
++static int stbi__cpuid3(void)
++{
++   int info[4];
++   __cpuid(info,1);
++   return info[3];
++}
++#else
++static int stbi__cpuid3(void)
++{
++   int res;
++   __asm {
++      mov  eax,1
++      cpuid
++      mov  res,edx
++   }
++   return res;
++}
++#endif
++
++#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
++
++#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
++static int stbi__sse2_available(void)
++{
++   int info3 = stbi__cpuid3();
++   return ((info3 >> 26) & 1) != 0;
++}
++#endif
++
++#else // assume GCC-style if not VC++
++#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
++
++#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
++static int stbi__sse2_available(void)
++{
++   // If we're even attempting to compile this on GCC/Clang, that means
++   // -msse2 is on, which means the compiler is allowed to use SSE2
++   // instructions at will, and so are we.
++   return 1;
++}
++#endif
++
++#endif
++#endif
++
++// ARM NEON
++#if defined(STBI_NO_SIMD) && defined(STBI_NEON)
++#undef STBI_NEON
++#endif
++
++#ifdef STBI_NEON
++#include <arm_neon.h>
++// assume GCC or Clang on ARM targets
++#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
++#endif
++
++#ifndef STBI_SIMD_ALIGN
++#define STBI_SIMD_ALIGN(type, name) type name
++#endif
++
++///////////////////////////////////////////////
++//
++//  stbi__context struct and start_xxx functions
++
++// stbi__context structure is our basic context used by all images, so it
++// contains all the IO context, plus some basic image information
++typedef struct
++{
++   stbi__uint32 img_x, img_y;
++   int img_n, img_out_n;
++
++   stbi_io_callbacks io;
++   void *io_user_data;
++
++   int read_from_callbacks;
++   int buflen;
++   stbi_uc buffer_start[128];
++
++   stbi_uc *img_buffer, *img_buffer_end;
++   stbi_uc *img_buffer_original, *img_buffer_original_end;
++} stbi__context;
++
++
++static void stbi__refill_buffer(stbi__context *s);
++
++// initialize a memory-decode context
++static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len)
++{
++   s->io.read = NULL;
++   s->read_from_callbacks = 0;
++   s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer;
++   s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len;
++}
++
++// initialize a callback-based context
++static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user)
++{
++   s->io = *c;
++   s->io_user_data = user;
++   s->buflen = sizeof(s->buffer_start);
++   s->read_from_callbacks = 1;
++   s->img_buffer_original = s->buffer_start;
++   stbi__refill_buffer(s);
++   s->img_buffer_original_end = s->img_buffer_end;
++}
++
++#ifndef STBI_NO_STDIO
++
++static int stbi__stdio_read(void *user, char *data, int size)
++{
++   return (int) fread(data,1,size,(FILE*) user);
++}
++
++static void stbi__stdio_skip(void *user, int n)
++{
++   fseek((FILE*) user, n, SEEK_CUR);
++}
++
++static int stbi__stdio_eof(void *user)
++{
++   return feof((FILE*) user);
++}
++
++static stbi_io_callbacks stbi__stdio_callbacks =
++{
++   stbi__stdio_read,
++   stbi__stdio_skip,
++   stbi__stdio_eof,
++};
++
++static void stbi__start_file(stbi__context *s, FILE *f)
++{
++   stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f);
++}
++
++//static void stop_file(stbi__context *s) { }
++
++#endif // !STBI_NO_STDIO
++
++static void stbi__rewind(stbi__context *s)
++{
++   // conceptually rewind SHOULD rewind to the beginning of the stream,
++   // but we just rewind to the beginning of the initial buffer, because
++   // we only use it after doing 'test', which only ever looks at at most 92 bytes
++   s->img_buffer = s->img_buffer_original;
++   s->img_buffer_end = s->img_buffer_original_end;
++}
++
++enum
++{
++   STBI_ORDER_RGB,
++   STBI_ORDER_BGR
++};
++
++typedef struct
++{
++   int bits_per_channel;
++   int num_channels;
++   int channel_order;
++} stbi__result_info;
++
++#ifndef STBI_NO_JPEG
++static int      stbi__jpeg_test(stbi__context *s);
++static void    *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int      stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_PNG
++static int      stbi__png_test(stbi__context *s);
++static void    *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int      stbi__png_info(stbi__context *s, int *x, int *y, int *comp);
++static int      stbi__png_is16(stbi__context *s);
++#endif
++
++#ifndef STBI_NO_BMP
++static int      stbi__bmp_test(stbi__context *s);
++static void    *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int      stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_TGA
++static int      stbi__tga_test(stbi__context *s);
++static void    *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int      stbi__tga_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_PSD
++static int      stbi__psd_test(stbi__context *s);
++static void    *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc);
++static int      stbi__psd_info(stbi__context *s, int *x, int *y, int *comp);
++static int      stbi__psd_is16(stbi__context *s);
++#endif
++
++#ifndef STBI_NO_HDR
++static int      stbi__hdr_test(stbi__context *s);
++static float   *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int      stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_PIC
++static int      stbi__pic_test(stbi__context *s);
++static void    *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int      stbi__pic_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_GIF
++static int      stbi__gif_test(stbi__context *s);
++static void    *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static void    *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
++static int      stbi__gif_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_PNM
++static int      stbi__pnm_test(stbi__context *s);
++static void    *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int      stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++// this is not threadsafe
++static const char *stbi__g_failure_reason;
++
++STBIDEF const char *stbi_failure_reason(void)
++{
++   return stbi__g_failure_reason;
++}
++
++static int stbi__err(const char *str)
++{
++   stbi__g_failure_reason = str;
++   return 0;
++}
++
++static void *stbi__malloc(size_t size)
++{
++    return STBI_MALLOC(size);
++}
++
++// stb_image uses ints pervasively, including for offset calculations.
++// therefore the largest decoded image size we can support with the
++// current code, even on 64-bit targets, is INT_MAX. this is not a
++// significant limitation for the intended use case.
++//
++// we do, however, need to make sure our size calculations don't
++// overflow. hence a few helper functions for size calculations that
++// multiply integers together, making sure that they're non-negative
++// and no overflow occurs.
++
++// return 1 if the sum is valid, 0 on overflow.
++// negative terms are considered invalid.
++static int stbi__addsizes_valid(int a, int b)
++{
++   if (b < 0) return 0;
++   // now 0 <= b <= INT_MAX, hence also
++   // 0 <= INT_MAX - b <= INTMAX.
++   // And "a + b <= INT_MAX" (which might overflow) is the
++   // same as a <= INT_MAX - b (no overflow)
++   return a <= INT_MAX - b;
++}
++
++// returns 1 if the product is valid, 0 on overflow.
++// negative factors are considered invalid.
++static int stbi__mul2sizes_valid(int a, int b)
++{
++   if (a < 0 || b < 0) return 0;
++   if (b == 0) return 1; // mul-by-0 is always safe
++   // portable way to check for no overflows in a*b
++   return a <= INT_MAX/b;
++}
++
++// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
++static int stbi__mad2sizes_valid(int a, int b, int add)
++{
++   return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add);
++}
++
++// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow
++static int stbi__mad3sizes_valid(int a, int b, int c, int add)
++{
++   return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
++      stbi__addsizes_valid(a*b*c, add);
++}
++
++// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow
++#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
++static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
++{
++   return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
++      stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add);
++}
++#endif
++
++// mallocs with size overflow checking
++static void *stbi__malloc_mad2(int a, int b, int add)
++{
++   if (!stbi__mad2sizes_valid(a, b, add)) return NULL;
++   return stbi__malloc(a*b + add);
++}
++
++static void *stbi__malloc_mad3(int a, int b, int c, int add)
++{
++   if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL;
++   return stbi__malloc(a*b*c + add);
++}
++
++#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
++static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
++{
++   if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
++   return stbi__malloc(a*b*c*d + add);
++}
++#endif
++
++// stbi__err - error
++// stbi__errpf - error returning pointer to float
++// stbi__errpuc - error returning pointer to unsigned char
++
++#ifdef STBI_NO_FAILURE_STRINGS
++   #define stbi__err(x,y)  0
++#elif defined(STBI_FAILURE_USERMSG)
++   #define stbi__err(x,y)  stbi__err(y)
++#else
++   #define stbi__err(x,y)  stbi__err(x)
++#endif
++
++#define stbi__errpf(x,y)   ((float *)(size_t) (stbi__err(x,y)?NULL:NULL))
++#define stbi__errpuc(x,y)  ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL))
++
++STBIDEF void stbi_image_free(void *retval_from_stbi_load)
++{
++   STBI_FREE(retval_from_stbi_load);
++}
++
++#ifndef STBI_NO_LINEAR
++static float   *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp);
++#endif
++
++#ifndef STBI_NO_HDR
++static stbi_uc *stbi__hdr_to_ldr(float   *data, int x, int y, int comp);
++#endif
++
++static int stbi__vertically_flip_on_load = 0;
++
++STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
++{
++    stbi__vertically_flip_on_load = flag_true_if_should_flip;
++}
++
++static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
++{
++   memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields
++   ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed
++   ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order
++   ri->num_channels = 0;
++
++   #ifndef STBI_NO_JPEG
++   if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri);
++   #endif
++   #ifndef STBI_NO_PNG
++   if (stbi__png_test(s))  return stbi__png_load(s,x,y,comp,req_comp, ri);
++   #endif
++   #ifndef STBI_NO_BMP
++   if (stbi__bmp_test(s))  return stbi__bmp_load(s,x,y,comp,req_comp, ri);
++   #endif
++   #ifndef STBI_NO_GIF
++   if (stbi__gif_test(s))  return stbi__gif_load(s,x,y,comp,req_comp, ri);
++   #endif
++   #ifndef STBI_NO_PSD
++   if (stbi__psd_test(s))  return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc);
++   #endif
++   #ifndef STBI_NO_PIC
++   if (stbi__pic_test(s))  return stbi__pic_load(s,x,y,comp,req_comp, ri);
++   #endif
++   #ifndef STBI_NO_PNM
++   if (stbi__pnm_test(s))  return stbi__pnm_load(s,x,y,comp,req_comp, ri);
++   #endif
++
++   #ifndef STBI_NO_HDR
++   if (stbi__hdr_test(s)) {
++      float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri);
++      return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
++   }
++   #endif
++
++   #ifndef STBI_NO_TGA
++   // test tga last because it's a crappy test!
++   if (stbi__tga_test(s))
++      return stbi__tga_load(s,x,y,comp,req_comp, ri);
++   #endif
++
++   return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt");
++}
++
++static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels)
++{
++   int i;
++   int img_len = w * h * channels;
++   stbi_uc *reduced;
++
++   reduced = (stbi_uc *) stbi__malloc(img_len);
++   if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory");
++
++   for (i = 0; i < img_len; ++i)
++      reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling
++
++   STBI_FREE(orig);
++   return reduced;
++}
++
++static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels)
++{
++   int i;
++   int img_len = w * h * channels;
++   stbi__uint16 *enlarged;
++
++   enlarged = (stbi__uint16 *) stbi__malloc(img_len*2);
++   if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
++
++   for (i = 0; i < img_len; ++i)
++      enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff
++
++   STBI_FREE(orig);
++   return enlarged;
++}
++
++static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel)
++{
++   int row;
++   size_t bytes_per_row = (size_t)w * bytes_per_pixel;
++   stbi_uc temp[2048];
++   stbi_uc *bytes = (stbi_uc *)image;
++
++   for (row = 0; row < (h>>1); row++) {
++      stbi_uc *row0 = bytes + row*bytes_per_row;
++      stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row;
++      // swap row0 with row1
++      size_t bytes_left = bytes_per_row;
++      while (bytes_left) {
++         size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
++         memcpy(temp, row0, bytes_copy);
++         memcpy(row0, row1, bytes_copy);
++         memcpy(row1, temp, bytes_copy);
++         row0 += bytes_copy;
++         row1 += bytes_copy;
++         bytes_left -= bytes_copy;
++      }
++   }
++}
++
++#ifndef STBI_NO_GIF
++static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel)
++{
++   int slice;
++   int slice_size = w * h * bytes_per_pixel;
++
++   stbi_uc *bytes = (stbi_uc *)image;
++   for (slice = 0; slice < z; ++slice) {
++      stbi__vertical_flip(bytes, w, h, bytes_per_pixel); 
++      bytes += slice_size; 
++   }
++}
++#endif
++
++static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
++{
++   stbi__result_info ri;
++   void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8);
++
++   if (result == NULL)
++      return NULL;
++
++   if (ri.bits_per_channel != 8) {
++      STBI_ASSERT(ri.bits_per_channel == 16);
++      result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
++      ri.bits_per_channel = 8;
++   }
++
++   // @TODO: move stbi__convert_format to here
++
++   if (stbi__vertically_flip_on_load) {
++      int channels = req_comp ? req_comp : *comp;
++      stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc));
++   }
++
++   return (unsigned char *) result;
++}
++
++static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
++{
++   stbi__result_info ri;
++   void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16);
++
++   if (result == NULL)
++      return NULL;
++
++   if (ri.bits_per_channel != 16) {
++      STBI_ASSERT(ri.bits_per_channel == 8);
++      result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
++      ri.bits_per_channel = 16;
++   }
++
++   // @TODO: move stbi__convert_format16 to here
++   // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision
++
++   if (stbi__vertically_flip_on_load) {
++      int channels = req_comp ? req_comp : *comp;
++      stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16));
++   }
++
++   return (stbi__uint16 *) result;
++}
++
++#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR)
++static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp)
++{
++   if (stbi__vertically_flip_on_load && result != NULL) {
++      int channels = req_comp ? req_comp : *comp;
++      stbi__vertical_flip(result, *x, *y, channels * sizeof(float));
++   }
++}
++#endif
++
++#ifndef STBI_NO_STDIO
++
++#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
++STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide);
++STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default);
++#endif
++
++#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
++STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input)
++{
++	return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL);
++}
++#endif
++
++static FILE *stbi__fopen(char const *filename, char const *mode)
++{
++   FILE *f;
++#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
++   wchar_t wMode[64];
++   wchar_t wFilename[1024];
++	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)))
++      return 0;
++	
++	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)))
++      return 0;
++
++#if _MSC_VER >= 1400
++	if (0 != _wfopen_s(&f, wFilename, wMode))
++		f = 0;
++#else
++   f = _wfopen(wFilename, wMode);
++#endif
++
++#elif defined(_MSC_VER) && _MSC_VER >= 1400
++   if (0 != fopen_s(&f, filename, mode))
++      f=0;
++#else
++   f = fopen(filename, mode);
++#endif
++   return f;
++}
++
++
++STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp)
++{
++   FILE *f = stbi__fopen(filename, "rb");
++   unsigned char *result;
++   if (!f) return stbi__errpuc("can't fopen", "Unable to open file");
++   result = stbi_load_from_file(f,x,y,comp,req_comp);
++   fclose(f);
++   return result;
++}
++
++STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
++{
++   unsigned char *result;
++   stbi__context s;
++   stbi__start_file(&s,f);
++   result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
++   if (result) {
++      // need to 'unget' all the characters in the IO buffer
++      fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
++   }
++   return result;
++}
++
++STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp)
++{
++   stbi__uint16 *result;
++   stbi__context s;
++   stbi__start_file(&s,f);
++   result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp);
++   if (result) {
++      // need to 'unget' all the characters in the IO buffer
++      fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
++   }
++   return result;
++}
++
++STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
++{
++   FILE *f = stbi__fopen(filename, "rb");
++   stbi__uint16 *result;
++   if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file");
++   result = stbi_load_from_file_16(f,x,y,comp,req_comp);
++   fclose(f);
++   return result;
++}
++
++
++#endif //!STBI_NO_STDIO
++
++STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
++{
++   stbi__context s;
++   stbi__start_mem(&s,buffer,len);
++   return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
++}
++
++STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
++{
++   stbi__context s;
++   stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user);
++   return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
++}
++
++STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
++{
++   stbi__context s;
++   stbi__start_mem(&s,buffer,len);
++   return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
++}
++
++STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
++{
++   stbi__context s;
++   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
++   return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
++}
++
++#ifndef STBI_NO_GIF
++STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
++{
++   unsigned char *result;
++   stbi__context s; 
++   stbi__start_mem(&s,buffer,len); 
++   
++   result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp);
++   if (stbi__vertically_flip_on_load) {
++      stbi__vertical_flip_slices( result, *x, *y, *z, *comp ); 
++   }
++
++   return result; 
++}
++#endif
++
++#ifndef STBI_NO_LINEAR
++static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp)
++{
++   unsigned char *data;
++   #ifndef STBI_NO_HDR
++   if (stbi__hdr_test(s)) {
++      stbi__result_info ri;
++      float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri);
++      if (hdr_data)
++         stbi__float_postprocess(hdr_data,x,y,comp,req_comp);
++      return hdr_data;
++   }
++   #endif
++   data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp);
++   if (data)
++      return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
++   return stbi__errpf("unknown image type", "Image not of any known type, or corrupt");
++}
++
++STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
++{
++   stbi__context s;
++   stbi__start_mem(&s,buffer,len);
++   return stbi__loadf_main(&s,x,y,comp,req_comp);
++}
++
++STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
++{
++   stbi__context s;
++   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
++   return stbi__loadf_main(&s,x,y,comp,req_comp);
++}
++
++#ifndef STBI_NO_STDIO
++STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
++{
++   float *result;
++   FILE *f = stbi__fopen(filename, "rb");
++   if (!f) return stbi__errpf("can't fopen", "Unable to open file");
++   result = stbi_loadf_from_file(f,x,y,comp,req_comp);
++   fclose(f);
++   return result;
++}
++
++STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
++{
++   stbi__context s;
++   stbi__start_file(&s,f);
++   return stbi__loadf_main(&s,x,y,comp,req_comp);
++}
++#endif // !STBI_NO_STDIO
++
++#endif // !STBI_NO_LINEAR
++
++// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is
++// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always
++// reports false!
++
++STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
++{
++   #ifndef STBI_NO_HDR
++   stbi__context s;
++   stbi__start_mem(&s,buffer,len);
++   return stbi__hdr_test(&s);
++   #else
++   STBI_NOTUSED(buffer);
++   STBI_NOTUSED(len);
++   return 0;
++   #endif
++}
++
++#ifndef STBI_NO_STDIO
++STBIDEF int      stbi_is_hdr          (char const *filename)
++{
++   FILE *f = stbi__fopen(filename, "rb");
++   int result=0;
++   if (f) {
++      result = stbi_is_hdr_from_file(f);
++      fclose(f);
++   }
++   return result;
++}
++
++STBIDEF int stbi_is_hdr_from_file(FILE *f)
++{
++   #ifndef STBI_NO_HDR
++   long pos = ftell(f);
++   int res;
++   stbi__context s;
++   stbi__start_file(&s,f);
++   res = stbi__hdr_test(&s);
++   fseek(f, pos, SEEK_SET);
++   return res;
++   #else
++   STBI_NOTUSED(f);
++   return 0;
++   #endif
++}
++#endif // !STBI_NO_STDIO
++
++STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
++{
++   #ifndef STBI_NO_HDR
++   stbi__context s;
++   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
++   return stbi__hdr_test(&s);
++   #else
++   STBI_NOTUSED(clbk);
++   STBI_NOTUSED(user);
++   return 0;
++   #endif
++}
++
++#ifndef STBI_NO_LINEAR
++static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f;
++
++STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
++STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
++#endif
++
++static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f;
++
++STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
++STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
++
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// Common code used by all image loaders
++//
++
++enum
++{
++   STBI__SCAN_load=0,
++   STBI__SCAN_type,
++   STBI__SCAN_header
++};
++
++static void stbi__refill_buffer(stbi__context *s)
++{
++   int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen);
++   if (n == 0) {
++      // at end of file, treat same as if from memory, but need to handle case
++      // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file
++      s->read_from_callbacks = 0;
++      s->img_buffer = s->buffer_start;
++      s->img_buffer_end = s->buffer_start+1;
++      *s->img_buffer = 0;
++   } else {
++      s->img_buffer = s->buffer_start;
++      s->img_buffer_end = s->buffer_start + n;
++   }
++}
++
++stbi_inline static stbi_uc stbi__get8(stbi__context *s)
++{
++   if (s->img_buffer < s->img_buffer_end)
++      return *s->img_buffer++;
++   if (s->read_from_callbacks) {
++      stbi__refill_buffer(s);
++      return *s->img_buffer++;
++   }
++   return 0;
++}
++
++stbi_inline static int stbi__at_eof(stbi__context *s)
++{
++   if (s->io.read) {
++      if (!(s->io.eof)(s->io_user_data)) return 0;
++      // if feof() is true, check if buffer = end
++      // special case: we've only got the special 0 character at the end
++      if (s->read_from_callbacks == 0) return 1;
++   }
++
++   return s->img_buffer >= s->img_buffer_end;
++}
++
++static void stbi__skip(stbi__context *s, int n)
++{
++   if (n < 0) {
++      s->img_buffer = s->img_buffer_end;
++      return;
++   }
++   if (s->io.read) {
++      int blen = (int) (s->img_buffer_end - s->img_buffer);
++      if (blen < n) {
++         s->img_buffer = s->img_buffer_end;
++         (s->io.skip)(s->io_user_data, n - blen);
++         return;
++      }
++   }
++   s->img_buffer += n;
++}
++
++static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n)
++{
++   if (s->io.read) {
++      int blen = (int) (s->img_buffer_end - s->img_buffer);
++      if (blen < n) {
++         int res, count;
++
++         memcpy(buffer, s->img_buffer, blen);
++
++         count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen);
++         res = (count == (n-blen));
++         s->img_buffer = s->img_buffer_end;
++         return res;
++      }
++   }
++
++   if (s->img_buffer+n <= s->img_buffer_end) {
++      memcpy(buffer, s->img_buffer, n);
++      s->img_buffer += n;
++      return 1;
++   } else
++      return 0;
++}
++
++static int stbi__get16be(stbi__context *s)
++{
++   int z = stbi__get8(s);
++   return (z << 8) + stbi__get8(s);
++}
++
++static stbi__uint32 stbi__get32be(stbi__context *s)
++{
++   stbi__uint32 z = stbi__get16be(s);
++   return (z << 16) + stbi__get16be(s);
++}
++
++#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF)
++// nothing
++#else
++static int stbi__get16le(stbi__context *s)
++{
++   int z = stbi__get8(s);
++   return z + (stbi__get8(s) << 8);
++}
++#endif
++
++#ifndef STBI_NO_BMP
++static stbi__uint32 stbi__get32le(stbi__context *s)
++{
++   stbi__uint32 z = stbi__get16le(s);
++   return z + (stbi__get16le(s) << 16);
++}
++#endif
++
++#define STBI__BYTECAST(x)  ((stbi_uc) ((x) & 255))  // truncate int to byte without warnings
++
++
++//////////////////////////////////////////////////////////////////////////////
++//
++//  generic converter from built-in img_n to req_comp
++//    individual types do this automatically as much as possible (e.g. jpeg
++//    does all cases internally since it needs to colorspace convert anyway,
++//    and it never has alpha, so very few cases ). png can automatically
++//    interleave an alpha=255 channel, but falls back to this for other cases
++//
++//  assume data buffer is malloced, so malloc a new one and free that one
++//  only failure mode is malloc failing
++
++static stbi_uc stbi__compute_y(int r, int g, int b)
++{
++   return (stbi_uc) (((r*77) + (g*150) +  (29*b)) >> 8);
++}
++
++static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y)
++{
++   int i,j;
++   unsigned char *good;
++
++   if (req_comp == img_n) return data;
++   STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
++
++   good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0);
++   if (good == NULL) {
++      STBI_FREE(data);
++      return stbi__errpuc("outofmem", "Out of memory");
++   }
++
++   for (j=0; j < (int) y; ++j) {
++      unsigned char *src  = data + j * x * img_n   ;
++      unsigned char *dest = good + j * x * req_comp;
++
++      #define STBI__COMBO(a,b)  ((a)*8+(b))
++      #define STBI__CASE(a,b)   case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
++      // convert source image with img_n components to one with req_comp components;
++      // avoid switch per pixel, so use switch per scanline and massive macros
++      switch (STBI__COMBO(img_n, req_comp)) {
++         STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255;                                     } break;
++         STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0];                                  } break;
++         STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255;                     } break;
++         STBI__CASE(2,1) { dest[0]=src[0];                                                  } break;
++         STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0];                                  } break;
++         STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1];                  } break;
++         STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255;        } break;
++         STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]);                   } break;
++         STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255;    } break;
++         STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]);                   } break;
++         STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break;
++         STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];                    } break;
++         default: STBI_ASSERT(0);
++      }
++      #undef STBI__CASE
++   }
++
++   STBI_FREE(data);
++   return good;
++}
++
++static stbi__uint16 stbi__compute_y_16(int r, int g, int b)
++{
++   return (stbi__uint16) (((r*77) + (g*150) +  (29*b)) >> 8);
++}
++
++static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y)
++{
++   int i,j;
++   stbi__uint16 *good;
++
++   if (req_comp == img_n) return data;
++   STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
++
++   good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2);
++   if (good == NULL) {
++      STBI_FREE(data);
++      return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
++   }
++
++   for (j=0; j < (int) y; ++j) {
++      stbi__uint16 *src  = data + j * x * img_n   ;
++      stbi__uint16 *dest = good + j * x * req_comp;
++
++      #define STBI__COMBO(a,b)  ((a)*8+(b))
++      #define STBI__CASE(a,b)   case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
++      // convert source image with img_n components to one with req_comp components;
++      // avoid switch per pixel, so use switch per scanline and massive macros
++      switch (STBI__COMBO(img_n, req_comp)) {
++         STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff;                                     } break;
++         STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0];                                     } break;
++         STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff;                     } break;
++         STBI__CASE(2,1) { dest[0]=src[0];                                                     } break;
++         STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0];                                     } break;
++         STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1];                     } break;
++         STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff;        } break;
++         STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]);                   } break;
++         STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break;
++         STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]);                   } break;
++         STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break;
++         STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];                       } break;
++         default: STBI_ASSERT(0);
++      }
++      #undef STBI__CASE
++   }
++
++   STBI_FREE(data);
++   return good;
++}
++
++#ifndef STBI_NO_LINEAR
++static float   *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp)
++{
++   int i,k,n;
++   float *output;
++   if (!data) return NULL;
++   output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0);
++   if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); }
++   // compute number of non-alpha components
++   if (comp & 1) n = comp; else n = comp-1;
++   for (i=0; i < x*y; ++i) {
++      for (k=0; k < n; ++k) {
++         output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale);
++      }
++   }
++   if (n < comp) {
++      for (i=0; i < x*y; ++i) {
++         output[i*comp + n] = data[i*comp + n]/255.0f;
++      }
++   }
++   STBI_FREE(data);
++   return output;
++}
++#endif
++
++#ifndef STBI_NO_HDR
++#define stbi__float2int(x)   ((int) (x))
++static stbi_uc *stbi__hdr_to_ldr(float   *data, int x, int y, int comp)
++{
++   int i,k,n;
++   stbi_uc *output;
++   if (!data) return NULL;
++   output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0);
++   if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); }
++   // compute number of non-alpha components
++   if (comp & 1) n = comp; else n = comp-1;
++   for (i=0; i < x*y; ++i) {
++      for (k=0; k < n; ++k) {
++         float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f;
++         if (z < 0) z = 0;
++         if (z > 255) z = 255;
++         output[i*comp + k] = (stbi_uc) stbi__float2int(z);
++      }
++      if (k < comp) {
++         float z = data[i*comp+k] * 255 + 0.5f;
++         if (z < 0) z = 0;
++         if (z > 255) z = 255;
++         output[i*comp + k] = (stbi_uc) stbi__float2int(z);
++      }
++   }
++   STBI_FREE(data);
++   return output;
++}
++#endif
++
++//////////////////////////////////////////////////////////////////////////////
++//
++//  "baseline" JPEG/JFIF decoder
++//
++//    simple implementation
++//      - doesn't support delayed output of y-dimension
++//      - simple interface (only one output format: 8-bit interleaved RGB)
++//      - doesn't try to recover corrupt jpegs
++//      - doesn't allow partial loading, loading multiple at once
++//      - still fast on x86 (copying globals into locals doesn't help x86)
++//      - allocates lots of intermediate memory (full size of all components)
++//        - non-interleaved case requires this anyway
++//        - allows good upsampling (see next)
++//    high-quality
++//      - upsampled channels are bilinearly interpolated, even across blocks
++//      - quality integer IDCT derived from IJG's 'slow'
++//    performance
++//      - fast huffman; reasonable integer IDCT
++//      - some SIMD kernels for common paths on targets with SSE2/NEON
++//      - uses a lot of intermediate memory, could cache poorly
++
++#ifndef STBI_NO_JPEG
++
++// huffman decoding acceleration
++#define FAST_BITS   9  // larger handles more cases; smaller stomps less cache
++
++typedef struct
++{
++   stbi_uc  fast[1 << FAST_BITS];
++   // weirdly, repacking this into AoS is a 10% speed loss, instead of a win
++   stbi__uint16 code[256];
++   stbi_uc  values[256];
++   stbi_uc  size[257];
++   unsigned int maxcode[18];
++   int    delta[17];   // old 'firstsymbol' - old 'firstcode'
++} stbi__huffman;
++
++typedef struct
++{
++   stbi__context *s;
++   stbi__huffman huff_dc[4];
++   stbi__huffman huff_ac[4];
++   stbi__uint16 dequant[4][64];
++   stbi__int16 fast_ac[4][1 << FAST_BITS];
++
++// sizes for components, interleaved MCUs
++   int img_h_max, img_v_max;
++   int img_mcu_x, img_mcu_y;
++   int img_mcu_w, img_mcu_h;
++
++// definition of jpeg image component
++   struct
++   {
++      int id;
++      int h,v;
++      int tq;
++      int hd,ha;
++      int dc_pred;
++
++      int x,y,w2,h2;
++      stbi_uc *data;
++      void *raw_data, *raw_coeff;
++      stbi_uc *linebuf;
++      short   *coeff;   // progressive only
++      int      coeff_w, coeff_h; // number of 8x8 coefficient blocks
++   } img_comp[4];
++
++   stbi__uint32   code_buffer; // jpeg entropy-coded buffer
++   int            code_bits;   // number of valid bits
++   unsigned char  marker;      // marker seen while filling entropy buffer
++   int            nomore;      // flag if we saw a marker so must stop
++
++   int            progressive;
++   int            spec_start;
++   int            spec_end;
++   int            succ_high;
++   int            succ_low;
++   int            eob_run;
++   int            jfif;
++   int            app14_color_transform; // Adobe APP14 tag
++   int            rgb;
++
++   int scan_n, order[4];
++   int restart_interval, todo;
++
++// kernels
++   void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]);
++   void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step);
++   stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs);
++} stbi__jpeg;
++
++static int stbi__build_huffman(stbi__huffman *h, int *count)
++{
++   int i,j,k=0;
++   unsigned int code;
++   // build size list for each symbol (from JPEG spec)
++   for (i=0; i < 16; ++i)
++      for (j=0; j < count[i]; ++j)
++         h->size[k++] = (stbi_uc) (i+1);
++   h->size[k] = 0;
++
++   // compute actual symbols (from jpeg spec)
++   code = 0;
++   k = 0;
++   for(j=1; j <= 16; ++j) {
++      // compute delta to add to code to compute symbol id
++      h->delta[j] = k - code;
++      if (h->size[k] == j) {
++         while (h->size[k] == j)
++            h->code[k++] = (stbi__uint16) (code++);
++         if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG");
++      }
++      // compute largest code + 1 for this size, preshifted as needed later
++      h->maxcode[j] = code << (16-j);
++      code <<= 1;
++   }
++   h->maxcode[j] = 0xffffffff;
++
++   // build non-spec acceleration table; 255 is flag for not-accelerated
++   memset(h->fast, 255, 1 << FAST_BITS);
++   for (i=0; i < k; ++i) {
++      int s = h->size[i];
++      if (s <= FAST_BITS) {
++         int c = h->code[i] << (FAST_BITS-s);
++         int m = 1 << (FAST_BITS-s);
++         for (j=0; j < m; ++j) {
++            h->fast[c+j] = (stbi_uc) i;
++         }
++      }
++   }
++   return 1;
++}
++
++// build a table that decodes both magnitude and value of small ACs in
++// one go.
++static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h)
++{
++   int i;
++   for (i=0; i < (1 << FAST_BITS); ++i) {
++      stbi_uc fast = h->fast[i];
++      fast_ac[i] = 0;
++      if (fast < 255) {
++         int rs = h->values[fast];
++         int run = (rs >> 4) & 15;
++         int magbits = rs & 15;
++         int len = h->size[fast];
++
++         if (magbits && len + magbits <= FAST_BITS) {
++            // magnitude code followed by receive_extend code
++            int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits);
++            int m = 1 << (magbits - 1);
++            if (k < m) k += (~0U << magbits) + 1;
++            // if the result is small enough, we can fit it in fast_ac table
++            if (k >= -128 && k <= 127)
++               fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits));
++         }
++      }
++   }
++}
++
++static void stbi__grow_buffer_unsafe(stbi__jpeg *j)
++{
++   do {
++      unsigned int b = j->nomore ? 0 : stbi__get8(j->s);
++      if (b == 0xff) {
++         int c = stbi__get8(j->s);
++         while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes
++         if (c != 0) {
++            j->marker = (unsigned char) c;
++            j->nomore = 1;
++            return;
++         }
++      }
++      j->code_buffer |= b << (24 - j->code_bits);
++      j->code_bits += 8;
++   } while (j->code_bits <= 24);
++}
++
++// (1 << n) - 1
++static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535};
++
++// decode a jpeg huffman value from the bitstream
++stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h)
++{
++   unsigned int temp;
++   int c,k;
++
++   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++
++   // look at the top FAST_BITS and determine what symbol ID it is,
++   // if the code is <= FAST_BITS
++   c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
++   k = h->fast[c];
++   if (k < 255) {
++      int s = h->size[k];
++      if (s > j->code_bits)
++         return -1;
++      j->code_buffer <<= s;
++      j->code_bits -= s;
++      return h->values[k];
++   }
++
++   // naive test is to shift the code_buffer down so k bits are
++   // valid, then test against maxcode. To speed this up, we've
++   // preshifted maxcode left so that it has (16-k) 0s at the
++   // end; in other words, regardless of the number of bits, it
++   // wants to be compared against something shifted to have 16;
++   // that way we don't need to shift inside the loop.
++   temp = j->code_buffer >> 16;
++   for (k=FAST_BITS+1 ; ; ++k)
++      if (temp < h->maxcode[k])
++         break;
++   if (k == 17) {
++      // error! code not found
++      j->code_bits -= 16;
++      return -1;
++   }
++
++   if (k > j->code_bits)
++      return -1;
++
++   // convert the huffman code to the symbol id
++   c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
++   STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
++
++   // convert the id to a symbol
++   j->code_bits -= k;
++   j->code_buffer <<= k;
++   return h->values[c];
++}
++
++// bias[n] = (-1<<n) + 1
++static const int stbi__jbias[16] = {0,-1,-3,-7,-15,-31,-63,-127,-255,-511,-1023,-2047,-4095,-8191,-16383,-32767};
++
++// combined JPEG 'receive' and JPEG 'extend', since baseline
++// always extends everything it receives.
++stbi_inline static int stbi__extend_receive(stbi__jpeg *j, int n)
++{
++   unsigned int k;
++   int sgn;
++   if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
++
++   sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB
++   k = stbi_lrot(j->code_buffer, n);
++   STBI_ASSERT(n >= 0 && n < (int) (sizeof(stbi__bmask)/sizeof(*stbi__bmask)));
++   j->code_buffer = k & ~stbi__bmask[n];
++   k &= stbi__bmask[n];
++   j->code_bits -= n;
++   return k + (stbi__jbias[n] & ~sgn);
++}
++
++// get some unsigned bits
++stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n)
++{
++   unsigned int k;
++   if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
++   k = stbi_lrot(j->code_buffer, n);
++   j->code_buffer = k & ~stbi__bmask[n];
++   k &= stbi__bmask[n];
++   j->code_bits -= n;
++   return k;
++}
++
++stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j)
++{
++   unsigned int k;
++   if (j->code_bits < 1) stbi__grow_buffer_unsafe(j);
++   k = j->code_buffer;
++   j->code_buffer <<= 1;
++   --j->code_bits;
++   return k & 0x80000000;
++}
++
++// given a value that's at position X in the zigzag stream,
++// where does it appear in the 8x8 matrix coded as row-major?
++static const stbi_uc stbi__jpeg_dezigzag[64+15] =
++{
++    0,  1,  8, 16,  9,  2,  3, 10,
++   17, 24, 32, 25, 18, 11,  4,  5,
++   12, 19, 26, 33, 40, 48, 41, 34,
++   27, 20, 13,  6,  7, 14, 21, 28,
++   35, 42, 49, 56, 57, 50, 43, 36,
++   29, 22, 15, 23, 30, 37, 44, 51,
++   58, 59, 52, 45, 38, 31, 39, 46,
++   53, 60, 61, 54, 47, 55, 62, 63,
++   // let corrupt input sample past end
++   63, 63, 63, 63, 63, 63, 63, 63,
++   63, 63, 63, 63, 63, 63, 63
++};
++
++// decode one 64-entry block--
++static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant)
++{
++   int diff,dc,k;
++   int t;
++
++   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++   t = stbi__jpeg_huff_decode(j, hdc);
++   if (t < 0) return stbi__err("bad huffman code","Corrupt JPEG");
++
++   // 0 all the ac values now so we can do it 32-bits at a time
++   memset(data,0,64*sizeof(data[0]));
++
++   diff = t ? stbi__extend_receive(j, t) : 0;
++   dc = j->img_comp[b].dc_pred + diff;
++   j->img_comp[b].dc_pred = dc;
++   data[0] = (short) (dc * dequant[0]);
++
++   // decode AC components, see JPEG spec
++   k = 1;
++   do {
++      unsigned int zig;
++      int c,r,s;
++      if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++      c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
++      r = fac[c];
++      if (r) { // fast-AC path
++         k += (r >> 4) & 15; // run
++         s = r & 15; // combined length
++         j->code_buffer <<= s;
++         j->code_bits -= s;
++         // decode into unzigzag'd location
++         zig = stbi__jpeg_dezigzag[k++];
++         data[zig] = (short) ((r >> 8) * dequant[zig]);
++      } else {
++         int rs = stbi__jpeg_huff_decode(j, hac);
++         if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
++         s = rs & 15;
++         r = rs >> 4;
++         if (s == 0) {
++            if (rs != 0xf0) break; // end block
++            k += 16;
++         } else {
++            k += r;
++            // decode into unzigzag'd location
++            zig = stbi__jpeg_dezigzag[k++];
++            data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]);
++         }
++      }
++   } while (k < 64);
++   return 1;
++}
++
++static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b)
++{
++   int diff,dc;
++   int t;
++   if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
++
++   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++
++   if (j->succ_high == 0) {
++      // first scan for DC coefficient, must be first
++      memset(data,0,64*sizeof(data[0])); // 0 all the ac values now
++      t = stbi__jpeg_huff_decode(j, hdc);
++      diff = t ? stbi__extend_receive(j, t) : 0;
++
++      dc = j->img_comp[b].dc_pred + diff;
++      j->img_comp[b].dc_pred = dc;
++      data[0] = (short) (dc << j->succ_low);
++   } else {
++      // refinement scan for DC coefficient
++      if (stbi__jpeg_get_bit(j))
++         data[0] += (short) (1 << j->succ_low);
++   }
++   return 1;
++}
++
++// @OPTIMIZE: store non-zigzagged during the decode passes,
++// and only de-zigzag when dequantizing
++static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac)
++{
++   int k;
++   if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
++
++   if (j->succ_high == 0) {
++      int shift = j->succ_low;
++
++      if (j->eob_run) {
++         --j->eob_run;
++         return 1;
++      }
++
++      k = j->spec_start;
++      do {
++         unsigned int zig;
++         int c,r,s;
++         if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++         c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
++         r = fac[c];
++         if (r) { // fast-AC path
++            k += (r >> 4) & 15; // run
++            s = r & 15; // combined length
++            j->code_buffer <<= s;
++            j->code_bits -= s;
++            zig = stbi__jpeg_dezigzag[k++];
++            data[zig] = (short) ((r >> 8) << shift);
++         } else {
++            int rs = stbi__jpeg_huff_decode(j, hac);
++            if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
++            s = rs & 15;
++            r = rs >> 4;
++            if (s == 0) {
++               if (r < 15) {
++                  j->eob_run = (1 << r);
++                  if (r)
++                     j->eob_run += stbi__jpeg_get_bits(j, r);
++                  --j->eob_run;
++                  break;
++               }
++               k += 16;
++            } else {
++               k += r;
++               zig = stbi__jpeg_dezigzag[k++];
++               data[zig] = (short) (stbi__extend_receive(j,s) << shift);
++            }
++         }
++      } while (k <= j->spec_end);
++   } else {
++      // refinement scan for these AC coefficients
++
++      short bit = (short) (1 << j->succ_low);
++
++      if (j->eob_run) {
++         --j->eob_run;
++         for (k = j->spec_start; k <= j->spec_end; ++k) {
++            short *p = &data[stbi__jpeg_dezigzag[k]];
++            if (*p != 0)
++               if (stbi__jpeg_get_bit(j))
++                  if ((*p & bit)==0) {
++                     if (*p > 0)
++                        *p += bit;
++                     else
++                        *p -= bit;
++                  }
++         }
++      } else {
++         k = j->spec_start;
++         do {
++            int r,s;
++            int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh
++            if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
++            s = rs & 15;
++            r = rs >> 4;
++            if (s == 0) {
++               if (r < 15) {
++                  j->eob_run = (1 << r) - 1;
++                  if (r)
++                     j->eob_run += stbi__jpeg_get_bits(j, r);
++                  r = 64; // force end of block
++               } else {
++                  // r=15 s=0 should write 16 0s, so we just do
++                  // a run of 15 0s and then write s (which is 0),
++                  // so we don't have to do anything special here
++               }
++            } else {
++               if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG");
++               // sign bit
++               if (stbi__jpeg_get_bit(j))
++                  s = bit;
++               else
++                  s = -bit;
++            }
++
++            // advance by r
++            while (k <= j->spec_end) {
++               short *p = &data[stbi__jpeg_dezigzag[k++]];
++               if (*p != 0) {
++                  if (stbi__jpeg_get_bit(j))
++                     if ((*p & bit)==0) {
++                        if (*p > 0)
++                           *p += bit;
++                        else
++                           *p -= bit;
++                     }
++               } else {
++                  if (r == 0) {
++                     *p = (short) s;
++                     break;
++                  }
++                  --r;
++               }
++            }
++         } while (k <= j->spec_end);
++      }
++   }
++   return 1;
++}
++
++// take a -128..127 value and stbi__clamp it and convert to 0..255
++stbi_inline static stbi_uc stbi__clamp(int x)
++{
++   // trick to use a single test to catch both cases
++   if ((unsigned int) x > 255) {
++      if (x < 0) return 0;
++      if (x > 255) return 255;
++   }
++   return (stbi_uc) x;
++}
++
++#define stbi__f2f(x)  ((int) (((x) * 4096 + 0.5)))
++#define stbi__fsh(x)  ((x) * 4096)
++
++// derived from jidctint -- DCT_ISLOW
++#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \
++   int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \
++   p2 = s2;                                    \
++   p3 = s6;                                    \
++   p1 = (p2+p3) * stbi__f2f(0.5411961f);       \
++   t2 = p1 + p3*stbi__f2f(-1.847759065f);      \
++   t3 = p1 + p2*stbi__f2f( 0.765366865f);      \
++   p2 = s0;                                    \
++   p3 = s4;                                    \
++   t0 = stbi__fsh(p2+p3);                      \
++   t1 = stbi__fsh(p2-p3);                      \
++   x0 = t0+t3;                                 \
++   x3 = t0-t3;                                 \
++   x1 = t1+t2;                                 \
++   x2 = t1-t2;                                 \
++   t0 = s7;                                    \
++   t1 = s5;                                    \
++   t2 = s3;                                    \
++   t3 = s1;                                    \
++   p3 = t0+t2;                                 \
++   p4 = t1+t3;                                 \
++   p1 = t0+t3;                                 \
++   p2 = t1+t2;                                 \
++   p5 = (p3+p4)*stbi__f2f( 1.175875602f);      \
++   t0 = t0*stbi__f2f( 0.298631336f);           \
++   t1 = t1*stbi__f2f( 2.053119869f);           \
++   t2 = t2*stbi__f2f( 3.072711026f);           \
++   t3 = t3*stbi__f2f( 1.501321110f);           \
++   p1 = p5 + p1*stbi__f2f(-0.899976223f);      \
++   p2 = p5 + p2*stbi__f2f(-2.562915447f);      \
++   p3 = p3*stbi__f2f(-1.961570560f);           \
++   p4 = p4*stbi__f2f(-0.390180644f);           \
++   t3 += p1+p4;                                \
++   t2 += p2+p3;                                \
++   t1 += p2+p4;                                \
++   t0 += p1+p3;
++
++static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64])
++{
++   int i,val[64],*v=val;
++   stbi_uc *o;
++   short *d = data;
++
++   // columns
++   for (i=0; i < 8; ++i,++d, ++v) {
++      // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
++      if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0
++           && d[40]==0 && d[48]==0 && d[56]==0) {
++         //    no shortcut                 0     seconds
++         //    (1|2|3|4|5|6|7)==0          0     seconds
++         //    all separate               -0.047 seconds
++         //    1 && 2|3 && 4|5 && 6|7:    -0.047 seconds
++         int dcterm = d[0]*4;
++         v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
++      } else {
++         STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56])
++         // constants scaled things up by 1<<12; let's bring them back
++         // down, but keep 2 extra bits of precision
++         x0 += 512; x1 += 512; x2 += 512; x3 += 512;
++         v[ 0] = (x0+t3) >> 10;
++         v[56] = (x0-t3) >> 10;
++         v[ 8] = (x1+t2) >> 10;
++         v[48] = (x1-t2) >> 10;
++         v[16] = (x2+t1) >> 10;
++         v[40] = (x2-t1) >> 10;
++         v[24] = (x3+t0) >> 10;
++         v[32] = (x3-t0) >> 10;
++      }
++   }
++
++   for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) {
++      // no fast case since the first 1D IDCT spread components out
++      STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7])
++      // constants scaled things up by 1<<12, plus we had 1<<2 from first
++      // loop, plus horizontal and vertical each scale by sqrt(8) so together
++      // we've got an extra 1<<3, so 1<<17 total we need to remove.
++      // so we want to round that, which means adding 0.5 * 1<<17,
++      // aka 65536. Also, we'll end up with -128 to 127 that we want
++      // to encode as 0..255 by adding 128, so we'll add that before the shift
++      x0 += 65536 + (128<<17);
++      x1 += 65536 + (128<<17);
++      x2 += 65536 + (128<<17);
++      x3 += 65536 + (128<<17);
++      // tried computing the shifts into temps, or'ing the temps to see
++      // if any were out of range, but that was slower
++      o[0] = stbi__clamp((x0+t3) >> 17);
++      o[7] = stbi__clamp((x0-t3) >> 17);
++      o[1] = stbi__clamp((x1+t2) >> 17);
++      o[6] = stbi__clamp((x1-t2) >> 17);
++      o[2] = stbi__clamp((x2+t1) >> 17);
++      o[5] = stbi__clamp((x2-t1) >> 17);
++      o[3] = stbi__clamp((x3+t0) >> 17);
++      o[4] = stbi__clamp((x3-t0) >> 17);
++   }
++}
++
++#ifdef STBI_SSE2
++// sse2 integer IDCT. not the fastest possible implementation but it
++// produces bit-identical results to the generic C version so it's
++// fully "transparent".
++static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
++{
++   // This is constructed to match our regular (generic) integer IDCT exactly.
++   __m128i row0, row1, row2, row3, row4, row5, row6, row7;
++   __m128i tmp;
++
++   // dot product constant: even elems=x, odd elems=y
++   #define dct_const(x,y)  _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y))
++
++   // out(0) = c0[even]*x + c0[odd]*y   (c0, x, y 16-bit, out 32-bit)
++   // out(1) = c1[even]*x + c1[odd]*y
++   #define dct_rot(out0,out1, x,y,c0,c1) \
++      __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \
++      __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \
++      __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \
++      __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \
++      __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \
++      __m128i out1##_h = _mm_madd_epi16(c0##hi, c1)
++
++   // out = in << 12  (in 16-bit, out 32-bit)
++   #define dct_widen(out, in) \
++      __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \
++      __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4)
++
++   // wide add
++   #define dct_wadd(out, a, b) \
++      __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \
++      __m128i out##_h = _mm_add_epi32(a##_h, b##_h)
++
++   // wide sub
++   #define dct_wsub(out, a, b) \
++      __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \
++      __m128i out##_h = _mm_sub_epi32(a##_h, b##_h)
++
++   // butterfly a/b, add bias, then shift by "s" and pack
++   #define dct_bfly32o(out0, out1, a,b,bias,s) \
++      { \
++         __m128i abiased_l = _mm_add_epi32(a##_l, bias); \
++         __m128i abiased_h = _mm_add_epi32(a##_h, bias); \
++         dct_wadd(sum, abiased, b); \
++         dct_wsub(dif, abiased, b); \
++         out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \
++         out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \
++      }
++
++   // 8-bit interleave step (for transposes)
++   #define dct_interleave8(a, b) \
++      tmp = a; \
++      a = _mm_unpacklo_epi8(a, b); \
++      b = _mm_unpackhi_epi8(tmp, b)
++
++   // 16-bit interleave step (for transposes)
++   #define dct_interleave16(a, b) \
++      tmp = a; \
++      a = _mm_unpacklo_epi16(a, b); \
++      b = _mm_unpackhi_epi16(tmp, b)
++
++   #define dct_pass(bias,shift) \
++      { \
++         /* even part */ \
++         dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \
++         __m128i sum04 = _mm_add_epi16(row0, row4); \
++         __m128i dif04 = _mm_sub_epi16(row0, row4); \
++         dct_widen(t0e, sum04); \
++         dct_widen(t1e, dif04); \
++         dct_wadd(x0, t0e, t3e); \
++         dct_wsub(x3, t0e, t3e); \
++         dct_wadd(x1, t1e, t2e); \
++         dct_wsub(x2, t1e, t2e); \
++         /* odd part */ \
++         dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \
++         dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \
++         __m128i sum17 = _mm_add_epi16(row1, row7); \
++         __m128i sum35 = _mm_add_epi16(row3, row5); \
++         dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \
++         dct_wadd(x4, y0o, y4o); \
++         dct_wadd(x5, y1o, y5o); \
++         dct_wadd(x6, y2o, y5o); \
++         dct_wadd(x7, y3o, y4o); \
++         dct_bfly32o(row0,row7, x0,x7,bias,shift); \
++         dct_bfly32o(row1,row6, x1,x6,bias,shift); \
++         dct_bfly32o(row2,row5, x2,x5,bias,shift); \
++         dct_bfly32o(row3,row4, x3,x4,bias,shift); \
++      }
++
++   __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f));
++   __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f));
++   __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f));
++   __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f));
++   __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f));
++   __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f));
++   __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f));
++   __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f));
++
++   // rounding biases in column/row passes, see stbi__idct_block for explanation.
++   __m128i bias_0 = _mm_set1_epi32(512);
++   __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17));
++
++   // load
++   row0 = _mm_load_si128((const __m128i *) (data + 0*8));
++   row1 = _mm_load_si128((const __m128i *) (data + 1*8));
++   row2 = _mm_load_si128((const __m128i *) (data + 2*8));
++   row3 = _mm_load_si128((const __m128i *) (data + 3*8));
++   row4 = _mm_load_si128((const __m128i *) (data + 4*8));
++   row5 = _mm_load_si128((const __m128i *) (data + 5*8));
++   row6 = _mm_load_si128((const __m128i *) (data + 6*8));
++   row7 = _mm_load_si128((const __m128i *) (data + 7*8));
++
++   // column pass
++   dct_pass(bias_0, 10);
++
++   {
++      // 16bit 8x8 transpose pass 1
++      dct_interleave16(row0, row4);
++      dct_interleave16(row1, row5);
++      dct_interleave16(row2, row6);
++      dct_interleave16(row3, row7);
++
++      // transpose pass 2
++      dct_interleave16(row0, row2);
++      dct_interleave16(row1, row3);
++      dct_interleave16(row4, row6);
++      dct_interleave16(row5, row7);
++
++      // transpose pass 3
++      dct_interleave16(row0, row1);
++      dct_interleave16(row2, row3);
++      dct_interleave16(row4, row5);
++      dct_interleave16(row6, row7);
++   }
++
++   // row pass
++   dct_pass(bias_1, 17);
++
++   {
++      // pack
++      __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7
++      __m128i p1 = _mm_packus_epi16(row2, row3);
++      __m128i p2 = _mm_packus_epi16(row4, row5);
++      __m128i p3 = _mm_packus_epi16(row6, row7);
++
++      // 8bit 8x8 transpose pass 1
++      dct_interleave8(p0, p2); // a0e0a1e1...
++      dct_interleave8(p1, p3); // c0g0c1g1...
++
++      // transpose pass 2
++      dct_interleave8(p0, p1); // a0c0e0g0...
++      dct_interleave8(p2, p3); // b0d0f0h0...
++
++      // transpose pass 3
++      dct_interleave8(p0, p2); // a0b0c0d0...
++      dct_interleave8(p1, p3); // a4b4c4d4...
++
++      // store
++      _mm_storel_epi64((__m128i *) out, p0); out += out_stride;
++      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride;
++      _mm_storel_epi64((__m128i *) out, p2); out += out_stride;
++      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride;
++      _mm_storel_epi64((__m128i *) out, p1); out += out_stride;
++      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride;
++      _mm_storel_epi64((__m128i *) out, p3); out += out_stride;
++      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e));
++   }
++
++#undef dct_const
++#undef dct_rot
++#undef dct_widen
++#undef dct_wadd
++#undef dct_wsub
++#undef dct_bfly32o
++#undef dct_interleave8
++#undef dct_interleave16
++#undef dct_pass
++}
++
++#endif // STBI_SSE2
++
++#ifdef STBI_NEON
++
++// NEON integer IDCT. should produce bit-identical
++// results to the generic C version.
++static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
++{
++   int16x8_t row0, row1, row2, row3, row4, row5, row6, row7;
++
++   int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f));
++   int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f));
++   int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f));
++   int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f));
++   int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f));
++   int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f));
++   int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f));
++   int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f));
++   int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f));
++   int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f));
++   int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f));
++   int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f));
++
++#define dct_long_mul(out, inq, coeff) \
++   int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \
++   int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff)
++
++#define dct_long_mac(out, acc, inq, coeff) \
++   int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \
++   int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff)
++
++#define dct_widen(out, inq) \
++   int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \
++   int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12)
++
++// wide add
++#define dct_wadd(out, a, b) \
++   int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \
++   int32x4_t out##_h = vaddq_s32(a##_h, b##_h)
++
++// wide sub
++#define dct_wsub(out, a, b) \
++   int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \
++   int32x4_t out##_h = vsubq_s32(a##_h, b##_h)
++
++// butterfly a/b, then shift using "shiftop" by "s" and pack
++#define dct_bfly32o(out0,out1, a,b,shiftop,s) \
++   { \
++      dct_wadd(sum, a, b); \
++      dct_wsub(dif, a, b); \
++      out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \
++      out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \
++   }
++
++#define dct_pass(shiftop, shift) \
++   { \
++      /* even part */ \
++      int16x8_t sum26 = vaddq_s16(row2, row6); \
++      dct_long_mul(p1e, sum26, rot0_0); \
++      dct_long_mac(t2e, p1e, row6, rot0_1); \
++      dct_long_mac(t3e, p1e, row2, rot0_2); \
++      int16x8_t sum04 = vaddq_s16(row0, row4); \
++      int16x8_t dif04 = vsubq_s16(row0, row4); \
++      dct_widen(t0e, sum04); \
++      dct_widen(t1e, dif04); \
++      dct_wadd(x0, t0e, t3e); \
++      dct_wsub(x3, t0e, t3e); \
++      dct_wadd(x1, t1e, t2e); \
++      dct_wsub(x2, t1e, t2e); \
++      /* odd part */ \
++      int16x8_t sum15 = vaddq_s16(row1, row5); \
++      int16x8_t sum17 = vaddq_s16(row1, row7); \
++      int16x8_t sum35 = vaddq_s16(row3, row5); \
++      int16x8_t sum37 = vaddq_s16(row3, row7); \
++      int16x8_t sumodd = vaddq_s16(sum17, sum35); \
++      dct_long_mul(p5o, sumodd, rot1_0); \
++      dct_long_mac(p1o, p5o, sum17, rot1_1); \
++      dct_long_mac(p2o, p5o, sum35, rot1_2); \
++      dct_long_mul(p3o, sum37, rot2_0); \
++      dct_long_mul(p4o, sum15, rot2_1); \
++      dct_wadd(sump13o, p1o, p3o); \
++      dct_wadd(sump24o, p2o, p4o); \
++      dct_wadd(sump23o, p2o, p3o); \
++      dct_wadd(sump14o, p1o, p4o); \
++      dct_long_mac(x4, sump13o, row7, rot3_0); \
++      dct_long_mac(x5, sump24o, row5, rot3_1); \
++      dct_long_mac(x6, sump23o, row3, rot3_2); \
++      dct_long_mac(x7, sump14o, row1, rot3_3); \
++      dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \
++      dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \
++      dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \
++      dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \
++   }
++
++   // load
++   row0 = vld1q_s16(data + 0*8);
++   row1 = vld1q_s16(data + 1*8);
++   row2 = vld1q_s16(data + 2*8);
++   row3 = vld1q_s16(data + 3*8);
++   row4 = vld1q_s16(data + 4*8);
++   row5 = vld1q_s16(data + 5*8);
++   row6 = vld1q_s16(data + 6*8);
++   row7 = vld1q_s16(data + 7*8);
++
++   // add DC bias
++   row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0));
++
++   // column pass
++   dct_pass(vrshrn_n_s32, 10);
++
++   // 16bit 8x8 transpose
++   {
++// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively.
++// whether compilers actually get this is another story, sadly.
++#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; }
++#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); }
++#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); }
++
++      // pass 1
++      dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6
++      dct_trn16(row2, row3);
++      dct_trn16(row4, row5);
++      dct_trn16(row6, row7);
++
++      // pass 2
++      dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4
++      dct_trn32(row1, row3);
++      dct_trn32(row4, row6);
++      dct_trn32(row5, row7);
++
++      // pass 3
++      dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0
++      dct_trn64(row1, row5);
++      dct_trn64(row2, row6);
++      dct_trn64(row3, row7);
++
++#undef dct_trn16
++#undef dct_trn32
++#undef dct_trn64
++   }
++
++   // row pass
++   // vrshrn_n_s32 only supports shifts up to 16, we need
++   // 17. so do a non-rounding shift of 16 first then follow
++   // up with a rounding shift by 1.
++   dct_pass(vshrn_n_s32, 16);
++
++   {
++      // pack and round
++      uint8x8_t p0 = vqrshrun_n_s16(row0, 1);
++      uint8x8_t p1 = vqrshrun_n_s16(row1, 1);
++      uint8x8_t p2 = vqrshrun_n_s16(row2, 1);
++      uint8x8_t p3 = vqrshrun_n_s16(row3, 1);
++      uint8x8_t p4 = vqrshrun_n_s16(row4, 1);
++      uint8x8_t p5 = vqrshrun_n_s16(row5, 1);
++      uint8x8_t p6 = vqrshrun_n_s16(row6, 1);
++      uint8x8_t p7 = vqrshrun_n_s16(row7, 1);
++
++      // again, these can translate into one instruction, but often don't.
++#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; }
++#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); }
++#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); }
++
++      // sadly can't use interleaved stores here since we only write
++      // 8 bytes to each scan line!
++
++      // 8x8 8-bit transpose pass 1
++      dct_trn8_8(p0, p1);
++      dct_trn8_8(p2, p3);
++      dct_trn8_8(p4, p5);
++      dct_trn8_8(p6, p7);
++
++      // pass 2
++      dct_trn8_16(p0, p2);
++      dct_trn8_16(p1, p3);
++      dct_trn8_16(p4, p6);
++      dct_trn8_16(p5, p7);
++
++      // pass 3
++      dct_trn8_32(p0, p4);
++      dct_trn8_32(p1, p5);
++      dct_trn8_32(p2, p6);
++      dct_trn8_32(p3, p7);
++
++      // store
++      vst1_u8(out, p0); out += out_stride;
++      vst1_u8(out, p1); out += out_stride;
++      vst1_u8(out, p2); out += out_stride;
++      vst1_u8(out, p3); out += out_stride;
++      vst1_u8(out, p4); out += out_stride;
++      vst1_u8(out, p5); out += out_stride;
++      vst1_u8(out, p6); out += out_stride;
++      vst1_u8(out, p7);
++
++#undef dct_trn8_8
++#undef dct_trn8_16
++#undef dct_trn8_32
++   }
++
++#undef dct_long_mul
++#undef dct_long_mac
++#undef dct_widen
++#undef dct_wadd
++#undef dct_wsub
++#undef dct_bfly32o
++#undef dct_pass
++}
++
++#endif // STBI_NEON
++
++#define STBI__MARKER_none  0xff
++// if there's a pending marker from the entropy stream, return that
++// otherwise, fetch from the stream and get a marker. if there's no
++// marker, return 0xff, which is never a valid marker value
++static stbi_uc stbi__get_marker(stbi__jpeg *j)
++{
++   stbi_uc x;
++   if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; }
++   x = stbi__get8(j->s);
++   if (x != 0xff) return STBI__MARKER_none;
++   while (x == 0xff)
++      x = stbi__get8(j->s); // consume repeated 0xff fill bytes
++   return x;
++}
++
++// in each scan, we'll have scan_n components, and the order
++// of the components is specified by order[]
++#define STBI__RESTART(x)     ((x) >= 0xd0 && (x) <= 0xd7)
++
++// after a restart interval, stbi__jpeg_reset the entropy decoder and
++// the dc prediction
++static void stbi__jpeg_reset(stbi__jpeg *j)
++{
++   j->code_bits = 0;
++   j->code_buffer = 0;
++   j->nomore = 0;
++   j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0;
++   j->marker = STBI__MARKER_none;
++   j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
++   j->eob_run = 0;
++   // no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
++   // since we don't even allow 1<<30 pixels
++}
++
++static int stbi__parse_entropy_coded_data(stbi__jpeg *z)
++{
++   stbi__jpeg_reset(z);
++   if (!z->progressive) {
++      if (z->scan_n == 1) {
++         int i,j;
++         STBI_SIMD_ALIGN(short, data[64]);
++         int n = z->order[0];
++         // non-interleaved data, we just need to process one block at a time,
++         // in trivial scanline order
++         // number of blocks to do just depends on how many actual "pixels" this
++         // component has, independent of interleaved MCU blocking and such
++         int w = (z->img_comp[n].x+7) >> 3;
++         int h = (z->img_comp[n].y+7) >> 3;
++         for (j=0; j < h; ++j) {
++            for (i=0; i < w; ++i) {
++               int ha = z->img_comp[n].ha;
++               if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
++               z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
++               // every data block is an MCU, so countdown the restart interval
++               if (--z->todo <= 0) {
++                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
++                  // if it's NOT a restart, then just bail, so we get corrupt data
++                  // rather than no data
++                  if (!STBI__RESTART(z->marker)) return 1;
++                  stbi__jpeg_reset(z);
++               }
++            }
++         }
++         return 1;
++      } else { // interleaved
++         int i,j,k,x,y;
++         STBI_SIMD_ALIGN(short, data[64]);
++         for (j=0; j < z->img_mcu_y; ++j) {
++            for (i=0; i < z->img_mcu_x; ++i) {
++               // scan an interleaved mcu... process scan_n components in order
++               for (k=0; k < z->scan_n; ++k) {
++                  int n = z->order[k];
++                  // scan out an mcu's worth of this component; that's just determined
++                  // by the basic H and V specified for the component
++                  for (y=0; y < z->img_comp[n].v; ++y) {
++                     for (x=0; x < z->img_comp[n].h; ++x) {
++                        int x2 = (i*z->img_comp[n].h + x)*8;
++                        int y2 = (j*z->img_comp[n].v + y)*8;
++                        int ha = z->img_comp[n].ha;
++                        if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
++                        z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data);
++                     }
++                  }
++               }
++               // after all interleaved components, that's an interleaved MCU,
++               // so now count down the restart interval
++               if (--z->todo <= 0) {
++                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
++                  if (!STBI__RESTART(z->marker)) return 1;
++                  stbi__jpeg_reset(z);
++               }
++            }
++         }
++         return 1;
++      }
++   } else {
++      if (z->scan_n == 1) {
++         int i,j;
++         int n = z->order[0];
++         // non-interleaved data, we just need to process one block at a time,
++         // in trivial scanline order
++         // number of blocks to do just depends on how many actual "pixels" this
++         // component has, independent of interleaved MCU blocking and such
++         int w = (z->img_comp[n].x+7) >> 3;
++         int h = (z->img_comp[n].y+7) >> 3;
++         for (j=0; j < h; ++j) {
++            for (i=0; i < w; ++i) {
++               short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
++               if (z->spec_start == 0) {
++                  if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
++                     return 0;
++               } else {
++                  int ha = z->img_comp[n].ha;
++                  if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha]))
++                     return 0;
++               }
++               // every data block is an MCU, so countdown the restart interval
++               if (--z->todo <= 0) {
++                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
++                  if (!STBI__RESTART(z->marker)) return 1;
++                  stbi__jpeg_reset(z);
++               }
++            }
++         }
++         return 1;
++      } else { // interleaved
++         int i,j,k,x,y;
++         for (j=0; j < z->img_mcu_y; ++j) {
++            for (i=0; i < z->img_mcu_x; ++i) {
++               // scan an interleaved mcu... process scan_n components in order
++               for (k=0; k < z->scan_n; ++k) {
++                  int n = z->order[k];
++                  // scan out an mcu's worth of this component; that's just determined
++                  // by the basic H and V specified for the component
++                  for (y=0; y < z->img_comp[n].v; ++y) {
++                     for (x=0; x < z->img_comp[n].h; ++x) {
++                        int x2 = (i*z->img_comp[n].h + x);
++                        int y2 = (j*z->img_comp[n].v + y);
++                        short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w);
++                        if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
++                           return 0;
++                     }
++                  }
++               }
++               // after all interleaved components, that's an interleaved MCU,
++               // so now count down the restart interval
++               if (--z->todo <= 0) {
++                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
++                  if (!STBI__RESTART(z->marker)) return 1;
++                  stbi__jpeg_reset(z);
++               }
++            }
++         }
++         return 1;
++      }
++   }
++}
++
++static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant)
++{
++   int i;
++   for (i=0; i < 64; ++i)
++      data[i] *= dequant[i];
++}
++
++static void stbi__jpeg_finish(stbi__jpeg *z)
++{
++   if (z->progressive) {
++      // dequantize and idct the data
++      int i,j,n;
++      for (n=0; n < z->s->img_n; ++n) {
++         int w = (z->img_comp[n].x+7) >> 3;
++         int h = (z->img_comp[n].y+7) >> 3;
++         for (j=0; j < h; ++j) {
++            for (i=0; i < w; ++i) {
++               short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
++               stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]);
++               z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
++            }
++         }
++      }
++   }
++}
++
++static int stbi__process_marker(stbi__jpeg *z, int m)
++{
++   int L;
++   switch (m) {
++      case STBI__MARKER_none: // no marker found
++         return stbi__err("expected marker","Corrupt JPEG");
++
++      case 0xDD: // DRI - specify restart interval
++         if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG");
++         z->restart_interval = stbi__get16be(z->s);
++         return 1;
++
++      case 0xDB: // DQT - define quantization table
++         L = stbi__get16be(z->s)-2;
++         while (L > 0) {
++            int q = stbi__get8(z->s);
++            int p = q >> 4, sixteen = (p != 0);
++            int t = q & 15,i;
++            if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG");
++            if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG");
++
++            for (i=0; i < 64; ++i)
++               z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s));
++            L -= (sixteen ? 129 : 65);
++         }
++         return L==0;
++
++      case 0xC4: // DHT - define huffman table
++         L = stbi__get16be(z->s)-2;
++         while (L > 0) {
++            stbi_uc *v;
++            int sizes[16],i,n=0;
++            int q = stbi__get8(z->s);
++            int tc = q >> 4;
++            int th = q & 15;
++            if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG");
++            for (i=0; i < 16; ++i) {
++               sizes[i] = stbi__get8(z->s);
++               n += sizes[i];
++            }
++            L -= 17;
++            if (tc == 0) {
++               if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0;
++               v = z->huff_dc[th].values;
++            } else {
++               if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0;
++               v = z->huff_ac[th].values;
++            }
++            for (i=0; i < n; ++i)
++               v[i] = stbi__get8(z->s);
++            if (tc != 0)
++               stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th);
++            L -= n;
++         }
++         return L==0;
++   }
++
++   // check for comment block or APP blocks
++   if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
++      L = stbi__get16be(z->s);
++      if (L < 2) {
++         if (m == 0xFE)
++            return stbi__err("bad COM len","Corrupt JPEG");
++         else
++            return stbi__err("bad APP len","Corrupt JPEG");
++      }
++      L -= 2;
++
++      if (m == 0xE0 && L >= 5) { // JFIF APP0 segment
++         static const unsigned char tag[5] = {'J','F','I','F','\0'};
++         int ok = 1;
++         int i;
++         for (i=0; i < 5; ++i)
++            if (stbi__get8(z->s) != tag[i])
++               ok = 0;
++         L -= 5;
++         if (ok)
++            z->jfif = 1;
++      } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
++         static const unsigned char tag[6] = {'A','d','o','b','e','\0'};
++         int ok = 1;
++         int i;
++         for (i=0; i < 6; ++i)
++            if (stbi__get8(z->s) != tag[i])
++               ok = 0;
++         L -= 6;
++         if (ok) {
++            stbi__get8(z->s); // version
++            stbi__get16be(z->s); // flags0
++            stbi__get16be(z->s); // flags1
++            z->app14_color_transform = stbi__get8(z->s); // color transform
++            L -= 6;
++         }
++      }
++
++      stbi__skip(z->s, L);
++      return 1;
++   }
++
++   return stbi__err("unknown marker","Corrupt JPEG");
++}
++
++// after we see SOS
++static int stbi__process_scan_header(stbi__jpeg *z)
++{
++   int i;
++   int Ls = stbi__get16be(z->s);
++   z->scan_n = stbi__get8(z->s);
++   if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG");
++   if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG");
++   for (i=0; i < z->scan_n; ++i) {
++      int id = stbi__get8(z->s), which;
++      int q = stbi__get8(z->s);
++      for (which = 0; which < z->s->img_n; ++which)
++         if (z->img_comp[which].id == id)
++            break;
++      if (which == z->s->img_n) return 0; // no match
++      z->img_comp[which].hd = q >> 4;   if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG");
++      z->img_comp[which].ha = q & 15;   if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG");
++      z->order[i] = which;
++   }
++
++   {
++      int aa;
++      z->spec_start = stbi__get8(z->s);
++      z->spec_end   = stbi__get8(z->s); // should be 63, but might be 0
++      aa = stbi__get8(z->s);
++      z->succ_high = (aa >> 4);
++      z->succ_low  = (aa & 15);
++      if (z->progressive) {
++         if (z->spec_start > 63 || z->spec_end > 63  || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13)
++            return stbi__err("bad SOS", "Corrupt JPEG");
++      } else {
++         if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG");
++         if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG");
++         z->spec_end = 63;
++      }
++   }
++
++   return 1;
++}
++
++static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why)
++{
++   int i;
++   for (i=0; i < ncomp; ++i) {
++      if (z->img_comp[i].raw_data) {
++         STBI_FREE(z->img_comp[i].raw_data);
++         z->img_comp[i].raw_data = NULL;
++         z->img_comp[i].data = NULL;
++      }
++      if (z->img_comp[i].raw_coeff) {
++         STBI_FREE(z->img_comp[i].raw_coeff);
++         z->img_comp[i].raw_coeff = 0;
++         z->img_comp[i].coeff = 0;
++      }
++      if (z->img_comp[i].linebuf) {
++         STBI_FREE(z->img_comp[i].linebuf);
++         z->img_comp[i].linebuf = NULL;
++      }
++   }
++   return why;
++}
++
++static int stbi__process_frame_header(stbi__jpeg *z, int scan)
++{
++   stbi__context *s = z->s;
++   int Lf,p,i,q, h_max=1,v_max=1,c;
++   Lf = stbi__get16be(s);         if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG
++   p  = stbi__get8(s);            if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline
++   s->img_y = stbi__get16be(s);   if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG
++   s->img_x = stbi__get16be(s);   if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires
++   c = stbi__get8(s);
++   if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG");
++   s->img_n = c;
++   for (i=0; i < c; ++i) {
++      z->img_comp[i].data = NULL;
++      z->img_comp[i].linebuf = NULL;
++   }
++
++   if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG");
++
++   z->rgb = 0;
++   for (i=0; i < s->img_n; ++i) {
++      static const unsigned char rgb[3] = { 'R', 'G', 'B' };
++      z->img_comp[i].id = stbi__get8(s);
++      if (s->img_n == 3 && z->img_comp[i].id == rgb[i])
++         ++z->rgb;
++      q = stbi__get8(s);
++      z->img_comp[i].h = (q >> 4);  if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG");
++      z->img_comp[i].v = q & 15;    if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG");
++      z->img_comp[i].tq = stbi__get8(s);  if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG");
++   }
++
++   if (scan != STBI__SCAN_load) return 1;
++
++   if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode");
++
++   for (i=0; i < s->img_n; ++i) {
++      if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h;
++      if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
++   }
++
++   // compute interleaved mcu info
++   z->img_h_max = h_max;
++   z->img_v_max = v_max;
++   z->img_mcu_w = h_max * 8;
++   z->img_mcu_h = v_max * 8;
++   // these sizes can't be more than 17 bits
++   z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w;
++   z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h;
++
++   for (i=0; i < s->img_n; ++i) {
++      // number of effective pixels (e.g. for non-interleaved MCU)
++      z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max;
++      z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max;
++      // to simplify generation, we'll allocate enough memory to decode
++      // the bogus oversized data from using interleaved MCUs and their
++      // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
++      // discard the extra data until colorspace conversion
++      //
++      // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier)
++      // so these muls can't overflow with 32-bit ints (which we require)
++      z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
++      z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
++      z->img_comp[i].coeff = 0;
++      z->img_comp[i].raw_coeff = 0;
++      z->img_comp[i].linebuf = NULL;
++      z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15);
++      if (z->img_comp[i].raw_data == NULL)
++         return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
++      // align blocks for idct using mmx/sse
++      z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15);
++      if (z->progressive) {
++         // w2, h2 are multiples of 8 (see above)
++         z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8;
++         z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8;
++         z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15);
++         if (z->img_comp[i].raw_coeff == NULL)
++            return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
++         z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15);
++      }
++   }
++
++   return 1;
++}
++
++// use comparisons since in some cases we handle more than one case (e.g. SOF)
++#define stbi__DNL(x)         ((x) == 0xdc)
++#define stbi__SOI(x)         ((x) == 0xd8)
++#define stbi__EOI(x)         ((x) == 0xd9)
++#define stbi__SOF(x)         ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)
++#define stbi__SOS(x)         ((x) == 0xda)
++
++#define stbi__SOF_progressive(x)   ((x) == 0xc2)
++
++static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan)
++{
++   int m;
++   z->jfif = 0;
++   z->app14_color_transform = -1; // valid values are 0,1,2
++   z->marker = STBI__MARKER_none; // initialize cached marker to empty
++   m = stbi__get_marker(z);
++   if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG");
++   if (scan == STBI__SCAN_type) return 1;
++   m = stbi__get_marker(z);
++   while (!stbi__SOF(m)) {
++      if (!stbi__process_marker(z,m)) return 0;
++      m = stbi__get_marker(z);
++      while (m == STBI__MARKER_none) {
++         // some files have extra padding after their blocks, so ok, we'll scan
++         if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG");
++         m = stbi__get_marker(z);
++      }
++   }
++   z->progressive = stbi__SOF_progressive(m);
++   if (!stbi__process_frame_header(z, scan)) return 0;
++   return 1;
++}
++
++// decode image to YCbCr format
++static int stbi__decode_jpeg_image(stbi__jpeg *j)
++{
++   int m;
++   for (m = 0; m < 4; m++) {
++      j->img_comp[m].raw_data = NULL;
++      j->img_comp[m].raw_coeff = NULL;
++   }
++   j->restart_interval = 0;
++   if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0;
++   m = stbi__get_marker(j);
++   while (!stbi__EOI(m)) {
++      if (stbi__SOS(m)) {
++         if (!stbi__process_scan_header(j)) return 0;
++         if (!stbi__parse_entropy_coded_data(j)) return 0;
++         if (j->marker == STBI__MARKER_none ) {
++            // handle 0s at the end of image data from IP Kamera 9060
++            while (!stbi__at_eof(j->s)) {
++               int x = stbi__get8(j->s);
++               if (x == 255) {
++                  j->marker = stbi__get8(j->s);
++                  break;
++               }
++            }
++            // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0
++         }
++      } else if (stbi__DNL(m)) {
++         int Ld = stbi__get16be(j->s);
++         stbi__uint32 NL = stbi__get16be(j->s);
++         if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG");
++         if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG");
++      } else {
++         if (!stbi__process_marker(j, m)) return 0;
++      }
++      m = stbi__get_marker(j);
++   }
++   if (j->progressive)
++      stbi__jpeg_finish(j);
++   return 1;
++}
++
++// static jfif-centered resampling (across block boundaries)
++
++typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1,
++                                    int w, int hs);
++
++#define stbi__div4(x) ((stbi_uc) ((x) >> 2))
++
++static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++   STBI_NOTUSED(out);
++   STBI_NOTUSED(in_far);
++   STBI_NOTUSED(w);
++   STBI_NOTUSED(hs);
++   return in_near;
++}
++
++static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++   // need to generate two samples vertically for every one in input
++   int i;
++   STBI_NOTUSED(hs);
++   for (i=0; i < w; ++i)
++      out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2);
++   return out;
++}
++
++static stbi_uc*  stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++   // need to generate two samples horizontally for every one in input
++   int i;
++   stbi_uc *input = in_near;
++
++   if (w == 1) {
++      // if only one sample, can't do any interpolation
++      out[0] = out[1] = input[0];
++      return out;
++   }
++
++   out[0] = input[0];
++   out[1] = stbi__div4(input[0]*3 + input[1] + 2);
++   for (i=1; i < w-1; ++i) {
++      int n = 3*input[i]+2;
++      out[i*2+0] = stbi__div4(n+input[i-1]);
++      out[i*2+1] = stbi__div4(n+input[i+1]);
++   }
++   out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2);
++   out[i*2+1] = input[w-1];
++
++   STBI_NOTUSED(in_far);
++   STBI_NOTUSED(hs);
++
++   return out;
++}
++
++#define stbi__div16(x) ((stbi_uc) ((x) >> 4))
++
++static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++   // need to generate 2x2 samples for every one in input
++   int i,t0,t1;
++   if (w == 1) {
++      out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
++      return out;
++   }
++
++   t1 = 3*in_near[0] + in_far[0];
++   out[0] = stbi__div4(t1+2);
++   for (i=1; i < w; ++i) {
++      t0 = t1;
++      t1 = 3*in_near[i]+in_far[i];
++      out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
++      out[i*2  ] = stbi__div16(3*t1 + t0 + 8);
++   }
++   out[w*2-1] = stbi__div4(t1+2);
++
++   STBI_NOTUSED(hs);
++
++   return out;
++}
++
++#if defined(STBI_SSE2) || defined(STBI_NEON)
++static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++   // need to generate 2x2 samples for every one in input
++   int i=0,t0,t1;
++
++   if (w == 1) {
++      out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
++      return out;
++   }
++
++   t1 = 3*in_near[0] + in_far[0];
++   // process groups of 8 pixels for as long as we can.
++   // note we can't handle the last pixel in a row in this loop
++   // because we need to handle the filter boundary conditions.
++   for (; i < ((w-1) & ~7); i += 8) {
++#if defined(STBI_SSE2)
++      // load and perform the vertical filtering pass
++      // this uses 3*x + y = 4*x + (y - x)
++      __m128i zero  = _mm_setzero_si128();
++      __m128i farb  = _mm_loadl_epi64((__m128i *) (in_far + i));
++      __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i));
++      __m128i farw  = _mm_unpacklo_epi8(farb, zero);
++      __m128i nearw = _mm_unpacklo_epi8(nearb, zero);
++      __m128i diff  = _mm_sub_epi16(farw, nearw);
++      __m128i nears = _mm_slli_epi16(nearw, 2);
++      __m128i curr  = _mm_add_epi16(nears, diff); // current row
++
++      // horizontal filter works the same based on shifted vers of current
++      // row. "prev" is current row shifted right by 1 pixel; we need to
++      // insert the previous pixel value (from t1).
++      // "next" is current row shifted left by 1 pixel, with first pixel
++      // of next block of 8 pixels added in.
++      __m128i prv0 = _mm_slli_si128(curr, 2);
++      __m128i nxt0 = _mm_srli_si128(curr, 2);
++      __m128i prev = _mm_insert_epi16(prv0, t1, 0);
++      __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7);
++
++      // horizontal filter, polyphase implementation since it's convenient:
++      // even pixels = 3*cur + prev = cur*4 + (prev - cur)
++      // odd  pixels = 3*cur + next = cur*4 + (next - cur)
++      // note the shared term.
++      __m128i bias  = _mm_set1_epi16(8);
++      __m128i curs = _mm_slli_epi16(curr, 2);
++      __m128i prvd = _mm_sub_epi16(prev, curr);
++      __m128i nxtd = _mm_sub_epi16(next, curr);
++      __m128i curb = _mm_add_epi16(curs, bias);
++      __m128i even = _mm_add_epi16(prvd, curb);
++      __m128i odd  = _mm_add_epi16(nxtd, curb);
++
++      // interleave even and odd pixels, then undo scaling.
++      __m128i int0 = _mm_unpacklo_epi16(even, odd);
++      __m128i int1 = _mm_unpackhi_epi16(even, odd);
++      __m128i de0  = _mm_srli_epi16(int0, 4);
++      __m128i de1  = _mm_srli_epi16(int1, 4);
++
++      // pack and write output
++      __m128i outv = _mm_packus_epi16(de0, de1);
++      _mm_storeu_si128((__m128i *) (out + i*2), outv);
++#elif defined(STBI_NEON)
++      // load and perform the vertical filtering pass
++      // this uses 3*x + y = 4*x + (y - x)
++      uint8x8_t farb  = vld1_u8(in_far + i);
++      uint8x8_t nearb = vld1_u8(in_near + i);
++      int16x8_t diff  = vreinterpretq_s16_u16(vsubl_u8(farb, nearb));
++      int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2));
++      int16x8_t curr  = vaddq_s16(nears, diff); // current row
++
++      // horizontal filter works the same based on shifted vers of current
++      // row. "prev" is current row shifted right by 1 pixel; we need to
++      // insert the previous pixel value (from t1).
++      // "next" is current row shifted left by 1 pixel, with first pixel
++      // of next block of 8 pixels added in.
++      int16x8_t prv0 = vextq_s16(curr, curr, 7);
++      int16x8_t nxt0 = vextq_s16(curr, curr, 1);
++      int16x8_t prev = vsetq_lane_s16(t1, prv0, 0);
++      int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7);
++
++      // horizontal filter, polyphase implementation since it's convenient:
++      // even pixels = 3*cur + prev = cur*4 + (prev - cur)
++      // odd  pixels = 3*cur + next = cur*4 + (next - cur)
++      // note the shared term.
++      int16x8_t curs = vshlq_n_s16(curr, 2);
++      int16x8_t prvd = vsubq_s16(prev, curr);
++      int16x8_t nxtd = vsubq_s16(next, curr);
++      int16x8_t even = vaddq_s16(curs, prvd);
++      int16x8_t odd  = vaddq_s16(curs, nxtd);
++
++      // undo scaling and round, then store with even/odd phases interleaved
++      uint8x8x2_t o;
++      o.val[0] = vqrshrun_n_s16(even, 4);
++      o.val[1] = vqrshrun_n_s16(odd,  4);
++      vst2_u8(out + i*2, o);
++#endif
++
++      // "previous" value for next iter
++      t1 = 3*in_near[i+7] + in_far[i+7];
++   }
++
++   t0 = t1;
++   t1 = 3*in_near[i] + in_far[i];
++   out[i*2] = stbi__div16(3*t1 + t0 + 8);
++
++   for (++i; i < w; ++i) {
++      t0 = t1;
++      t1 = 3*in_near[i]+in_far[i];
++      out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
++      out[i*2  ] = stbi__div16(3*t1 + t0 + 8);
++   }
++   out[w*2-1] = stbi__div4(t1+2);
++
++   STBI_NOTUSED(hs);
++
++   return out;
++}
++#endif
++
++static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++   // resample with nearest-neighbor
++   int i,j;
++   STBI_NOTUSED(in_far);
++   for (i=0; i < w; ++i)
++      for (j=0; j < hs; ++j)
++         out[i*hs+j] = in_near[i];
++   return out;
++}
++
++// this is a reduced-precision calculation of YCbCr-to-RGB introduced
++// to make sure the code produces the same results in both SIMD and scalar
++#define stbi__float2fixed(x)  (((int) ((x) * 4096.0f + 0.5f)) << 8)
++static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step)
++{
++   int i;
++   for (i=0; i < count; ++i) {
++      int y_fixed = (y[i] << 20) + (1<<19); // rounding
++      int r,g,b;
++      int cr = pcr[i] - 128;
++      int cb = pcb[i] - 128;
++      r = y_fixed +  cr* stbi__float2fixed(1.40200f);
++      g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
++      b = y_fixed                                     +   cb* stbi__float2fixed(1.77200f);
++      r >>= 20;
++      g >>= 20;
++      b >>= 20;
++      if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
++      if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
++      if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
++      out[0] = (stbi_uc)r;
++      out[1] = (stbi_uc)g;
++      out[2] = (stbi_uc)b;
++      out[3] = 255;
++      out += step;
++   }
++}
++
++#if defined(STBI_SSE2) || defined(STBI_NEON)
++static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step)
++{
++   int i = 0;
++
++#ifdef STBI_SSE2
++   // step == 3 is pretty ugly on the final interleave, and i'm not convinced
++   // it's useful in practice (you wouldn't use it for textures, for example).
++   // so just accelerate step == 4 case.
++   if (step == 4) {
++      // this is a fairly straightforward implementation and not super-optimized.
++      __m128i signflip  = _mm_set1_epi8(-0x80);
++      __m128i cr_const0 = _mm_set1_epi16(   (short) ( 1.40200f*4096.0f+0.5f));
++      __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f));
++      __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f));
++      __m128i cb_const1 = _mm_set1_epi16(   (short) ( 1.77200f*4096.0f+0.5f));
++      __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128);
++      __m128i xw = _mm_set1_epi16(255); // alpha channel
++
++      for (; i+7 < count; i += 8) {
++         // load
++         __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i));
++         __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i));
++         __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i));
++         __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128
++         __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128
++
++         // unpack to short (and left-shift cr, cb by 8)
++         __m128i yw  = _mm_unpacklo_epi8(y_bias, y_bytes);
++         __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased);
++         __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased);
++
++         // color transform
++         __m128i yws = _mm_srli_epi16(yw, 4);
++         __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw);
++         __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw);
++         __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1);
++         __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1);
++         __m128i rws = _mm_add_epi16(cr0, yws);
++         __m128i gwt = _mm_add_epi16(cb0, yws);
++         __m128i bws = _mm_add_epi16(yws, cb1);
++         __m128i gws = _mm_add_epi16(gwt, cr1);
++
++         // descale
++         __m128i rw = _mm_srai_epi16(rws, 4);
++         __m128i bw = _mm_srai_epi16(bws, 4);
++         __m128i gw = _mm_srai_epi16(gws, 4);
++
++         // back to byte, set up for transpose
++         __m128i brb = _mm_packus_epi16(rw, bw);
++         __m128i gxb = _mm_packus_epi16(gw, xw);
++
++         // transpose to interleave channels
++         __m128i t0 = _mm_unpacklo_epi8(brb, gxb);
++         __m128i t1 = _mm_unpackhi_epi8(brb, gxb);
++         __m128i o0 = _mm_unpacklo_epi16(t0, t1);
++         __m128i o1 = _mm_unpackhi_epi16(t0, t1);
++
++         // store
++         _mm_storeu_si128((__m128i *) (out + 0), o0);
++         _mm_storeu_si128((__m128i *) (out + 16), o1);
++         out += 32;
++      }
++   }
++#endif
++
++#ifdef STBI_NEON
++   // in this version, step=3 support would be easy to add. but is there demand?
++   if (step == 4) {
++      // this is a fairly straightforward implementation and not super-optimized.
++      uint8x8_t signflip = vdup_n_u8(0x80);
++      int16x8_t cr_const0 = vdupq_n_s16(   (short) ( 1.40200f*4096.0f+0.5f));
++      int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f));
++      int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f));
++      int16x8_t cb_const1 = vdupq_n_s16(   (short) ( 1.77200f*4096.0f+0.5f));
++
++      for (; i+7 < count; i += 8) {
++         // load
++         uint8x8_t y_bytes  = vld1_u8(y + i);
++         uint8x8_t cr_bytes = vld1_u8(pcr + i);
++         uint8x8_t cb_bytes = vld1_u8(pcb + i);
++         int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip));
++         int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip));
++
++         // expand to s16
++         int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4));
++         int16x8_t crw = vshll_n_s8(cr_biased, 7);
++         int16x8_t cbw = vshll_n_s8(cb_biased, 7);
++
++         // color transform
++         int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0);
++         int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0);
++         int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1);
++         int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1);
++         int16x8_t rws = vaddq_s16(yws, cr0);
++         int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1);
++         int16x8_t bws = vaddq_s16(yws, cb1);
++
++         // undo scaling, round, convert to byte
++         uint8x8x4_t o;
++         o.val[0] = vqrshrun_n_s16(rws, 4);
++         o.val[1] = vqrshrun_n_s16(gws, 4);
++         o.val[2] = vqrshrun_n_s16(bws, 4);
++         o.val[3] = vdup_n_u8(255);
++
++         // store, interleaving r/g/b/a
++         vst4_u8(out, o);
++         out += 8*4;
++      }
++   }
++#endif
++
++   for (; i < count; ++i) {
++      int y_fixed = (y[i] << 20) + (1<<19); // rounding
++      int r,g,b;
++      int cr = pcr[i] - 128;
++      int cb = pcb[i] - 128;
++      r = y_fixed + cr* stbi__float2fixed(1.40200f);
++      g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
++      b = y_fixed                                   +   cb* stbi__float2fixed(1.77200f);
++      r >>= 20;
++      g >>= 20;
++      b >>= 20;
++      if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
++      if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
++      if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
++      out[0] = (stbi_uc)r;
++      out[1] = (stbi_uc)g;
++      out[2] = (stbi_uc)b;
++      out[3] = 255;
++      out += step;
++   }
++}
++#endif
++
++// set up the kernels
++static void stbi__setup_jpeg(stbi__jpeg *j)
++{
++   j->idct_block_kernel = stbi__idct_block;
++   j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row;
++   j->resample_row_hv_2_kernel = stbi__resample_row_hv_2;
++
++#ifdef STBI_SSE2
++   if (stbi__sse2_available()) {
++      j->idct_block_kernel = stbi__idct_simd;
++      j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
++      j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
++   }
++#endif
++
++#ifdef STBI_NEON
++   j->idct_block_kernel = stbi__idct_simd;
++   j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
++   j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
++#endif
++}
++
++// clean up the temporary component buffers
++static void stbi__cleanup_jpeg(stbi__jpeg *j)
++{
++   stbi__free_jpeg_components(j, j->s->img_n, 0);
++}
++
++typedef struct
++{
++   resample_row_func resample;
++   stbi_uc *line0,*line1;
++   int hs,vs;   // expansion factor in each axis
++   int w_lores; // horizontal pixels pre-expansion
++   int ystep;   // how far through vertical expansion we are
++   int ypos;    // which pre-expansion row we're on
++} stbi__resample;
++
++// fast 0..255 * 0..255 => 0..255 rounded multiplication
++static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y)
++{
++   unsigned int t = x*y + 128;
++   return (stbi_uc) ((t + (t >>8)) >> 8);
++}
++
++static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp)
++{
++   int n, decode_n, is_rgb;
++   z->s->img_n = 0; // make stbi__cleanup_jpeg safe
++
++   // validate req_comp
++   if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
++
++   // load a jpeg image from whichever source, but leave in YCbCr format
++   if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; }
++
++   // determine actual number of components to generate
++   n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1;
++
++   is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif));
++
++   if (z->s->img_n == 3 && n < 3 && !is_rgb)
++      decode_n = 1;
++   else
++      decode_n = z->s->img_n;
++
++   // resample and color-convert
++   {
++      int k;
++      unsigned int i,j;
++      stbi_uc *output;
++      stbi_uc *coutput[4] = { NULL, NULL, NULL, NULL };
++
++      stbi__resample res_comp[4];
++
++      for (k=0; k < decode_n; ++k) {
++         stbi__resample *r = &res_comp[k];
++
++         // allocate line buffer big enough for upsampling off the edges
++         // with upsample factor of 4
++         z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3);
++         if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
++
++         r->hs      = z->img_h_max / z->img_comp[k].h;
++         r->vs      = z->img_v_max / z->img_comp[k].v;
++         r->ystep   = r->vs >> 1;
++         r->w_lores = (z->s->img_x + r->hs-1) / r->hs;
++         r->ypos    = 0;
++         r->line0   = r->line1 = z->img_comp[k].data;
++
++         if      (r->hs == 1 && r->vs == 1) r->resample = resample_row_1;
++         else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2;
++         else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2;
++         else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel;
++         else                               r->resample = stbi__resample_row_generic;
++      }
++
++      // can't error after this so, this is safe
++      output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1);
++      if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
++
++      // now go ahead and resample
++      for (j=0; j < z->s->img_y; ++j) {
++         stbi_uc *out = output + n * z->s->img_x * j;
++         for (k=0; k < decode_n; ++k) {
++            stbi__resample *r = &res_comp[k];
++            int y_bot = r->ystep >= (r->vs >> 1);
++            coutput[k] = r->resample(z->img_comp[k].linebuf,
++                                     y_bot ? r->line1 : r->line0,
++                                     y_bot ? r->line0 : r->line1,
++                                     r->w_lores, r->hs);
++            if (++r->ystep >= r->vs) {
++               r->ystep = 0;
++               r->line0 = r->line1;
++               if (++r->ypos < z->img_comp[k].y)
++                  r->line1 += z->img_comp[k].w2;
++            }
++         }
++         if (n >= 3) {
++            stbi_uc *y = coutput[0];
++            if (z->s->img_n == 3) {
++               if (is_rgb) {
++                  for (i=0; i < z->s->img_x; ++i) {
++                     out[0] = y[i];
++                     out[1] = coutput[1][i];
++                     out[2] = coutput[2][i];
++                     out[3] = 255;
++                     out += n;
++                  }
++               } else {
++                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
++               }
++            } else if (z->s->img_n == 4) {
++               if (z->app14_color_transform == 0) { // CMYK
++                  for (i=0; i < z->s->img_x; ++i) {
++                     stbi_uc m = coutput[3][i];
++                     out[0] = stbi__blinn_8x8(coutput[0][i], m);
++                     out[1] = stbi__blinn_8x8(coutput[1][i], m);
++                     out[2] = stbi__blinn_8x8(coutput[2][i], m);
++                     out[3] = 255;
++                     out += n;
++                  }
++               } else if (z->app14_color_transform == 2) { // YCCK
++                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
++                  for (i=0; i < z->s->img_x; ++i) {
++                     stbi_uc m = coutput[3][i];
++                     out[0] = stbi__blinn_8x8(255 - out[0], m);
++                     out[1] = stbi__blinn_8x8(255 - out[1], m);
++                     out[2] = stbi__blinn_8x8(255 - out[2], m);
++                     out += n;
++                  }
++               } else { // YCbCr + alpha?  Ignore the fourth channel for now
++                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
++               }
++            } else
++               for (i=0; i < z->s->img_x; ++i) {
++                  out[0] = out[1] = out[2] = y[i];
++                  out[3] = 255; // not used if n==3
++                  out += n;
++               }
++         } else {
++            if (is_rgb) {
++               if (n == 1)
++                  for (i=0; i < z->s->img_x; ++i)
++                     *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
++               else {
++                  for (i=0; i < z->s->img_x; ++i, out += 2) {
++                     out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
++                     out[1] = 255;
++                  }
++               }
++            } else if (z->s->img_n == 4 && z->app14_color_transform == 0) {
++               for (i=0; i < z->s->img_x; ++i) {
++                  stbi_uc m = coutput[3][i];
++                  stbi_uc r = stbi__blinn_8x8(coutput[0][i], m);
++                  stbi_uc g = stbi__blinn_8x8(coutput[1][i], m);
++                  stbi_uc b = stbi__blinn_8x8(coutput[2][i], m);
++                  out[0] = stbi__compute_y(r, g, b);
++                  out[1] = 255;
++                  out += n;
++               }
++            } else if (z->s->img_n == 4 && z->app14_color_transform == 2) {
++               for (i=0; i < z->s->img_x; ++i) {
++                  out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]);
++                  out[1] = 255;
++                  out += n;
++               }
++            } else {
++               stbi_uc *y = coutput[0];
++               if (n == 1)
++                  for (i=0; i < z->s->img_x; ++i) out[i] = y[i];
++               else
++                  for (i=0; i < z->s->img_x; ++i) { *out++ = y[i]; *out++ = 255; }
++            }
++         }
++      }
++      stbi__cleanup_jpeg(z);
++      *out_x = z->s->img_x;
++      *out_y = z->s->img_y;
++      if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output
++      return output;
++   }
++}
++
++static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++   unsigned char* result;
++   stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg));
++   STBI_NOTUSED(ri);
++   j->s = s;
++   stbi__setup_jpeg(j);
++   result = load_jpeg_image(j, x,y,comp,req_comp);
++   STBI_FREE(j);
++   return result;
++}
++
++static int stbi__jpeg_test(stbi__context *s)
++{
++   int r;
++   stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
++   j->s = s;
++   stbi__setup_jpeg(j);
++   r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
++   stbi__rewind(s);
++   STBI_FREE(j);
++   return r;
++}
++
++static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp)
++{
++   if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) {
++      stbi__rewind( j->s );
++      return 0;
++   }
++   if (x) *x = j->s->img_x;
++   if (y) *y = j->s->img_y;
++   if (comp) *comp = j->s->img_n >= 3 ? 3 : 1;
++   return 1;
++}
++
++static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
++{
++   int result;
++   stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg)));
++   j->s = s;
++   result = stbi__jpeg_info_raw(j, x, y, comp);
++   STBI_FREE(j);
++   return result;
++}
++#endif
++
++// public domain zlib decode    v0.2  Sean Barrett 2006-11-18
++//    simple implementation
++//      - all input must be provided in an upfront buffer
++//      - all output is written to a single output buffer (can malloc/realloc)
++//    performance
++//      - fast huffman
++
++#ifndef STBI_NO_ZLIB
++
++// fast-way is faster to check than jpeg huffman, but slow way is slower
++#define STBI__ZFAST_BITS  9 // accelerate all cases in default tables
++#define STBI__ZFAST_MASK  ((1 << STBI__ZFAST_BITS) - 1)
++
++// zlib-style huffman encoding
++// (jpegs packs from left, zlib from right, so can't share code)
++typedef struct
++{
++   stbi__uint16 fast[1 << STBI__ZFAST_BITS];
++   stbi__uint16 firstcode[16];
++   int maxcode[17];
++   stbi__uint16 firstsymbol[16];
++   stbi_uc  size[288];
++   stbi__uint16 value[288];
++} stbi__zhuffman;
++
++stbi_inline static int stbi__bitreverse16(int n)
++{
++  n = ((n & 0xAAAA) >>  1) | ((n & 0x5555) << 1);
++  n = ((n & 0xCCCC) >>  2) | ((n & 0x3333) << 2);
++  n = ((n & 0xF0F0) >>  4) | ((n & 0x0F0F) << 4);
++  n = ((n & 0xFF00) >>  8) | ((n & 0x00FF) << 8);
++  return n;
++}
++
++stbi_inline static int stbi__bit_reverse(int v, int bits)
++{
++   STBI_ASSERT(bits <= 16);
++   // to bit reverse n bits, reverse 16 and shift
++   // e.g. 11 bits, bit reverse and shift away 5
++   return stbi__bitreverse16(v) >> (16-bits);
++}
++
++static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num)
++{
++   int i,k=0;
++   int code, next_code[16], sizes[17];
++
++   // DEFLATE spec for generating codes
++   memset(sizes, 0, sizeof(sizes));
++   memset(z->fast, 0, sizeof(z->fast));
++   for (i=0; i < num; ++i)
++      ++sizes[sizelist[i]];
++   sizes[0] = 0;
++   for (i=1; i < 16; ++i)
++      if (sizes[i] > (1 << i))
++         return stbi__err("bad sizes", "Corrupt PNG");
++   code = 0;
++   for (i=1; i < 16; ++i) {
++      next_code[i] = code;
++      z->firstcode[i] = (stbi__uint16) code;
++      z->firstsymbol[i] = (stbi__uint16) k;
++      code = (code + sizes[i]);
++      if (sizes[i])
++         if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG");
++      z->maxcode[i] = code << (16-i); // preshift for inner loop
++      code <<= 1;
++      k += sizes[i];
++   }
++   z->maxcode[16] = 0x10000; // sentinel
++   for (i=0; i < num; ++i) {
++      int s = sizelist[i];
++      if (s) {
++         int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
++         stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i);
++         z->size [c] = (stbi_uc     ) s;
++         z->value[c] = (stbi__uint16) i;
++         if (s <= STBI__ZFAST_BITS) {
++            int j = stbi__bit_reverse(next_code[s],s);
++            while (j < (1 << STBI__ZFAST_BITS)) {
++               z->fast[j] = fastv;
++               j += (1 << s);
++            }
++         }
++         ++next_code[s];
++      }
++   }
++   return 1;
++}
++
++// zlib-from-memory implementation for PNG reading
++//    because PNG allows splitting the zlib stream arbitrarily,
++//    and it's annoying structurally to have PNG call ZLIB call PNG,
++//    we require PNG read all the IDATs and combine them into a single
++//    memory buffer
++
++typedef struct
++{
++   stbi_uc *zbuffer, *zbuffer_end;
++   int num_bits;
++   stbi__uint32 code_buffer;
++
++   char *zout;
++   char *zout_start;
++   char *zout_end;
++   int   z_expandable;
++
++   stbi__zhuffman z_length, z_distance;
++} stbi__zbuf;
++
++stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z)
++{
++   if (z->zbuffer >= z->zbuffer_end) return 0;
++   return *z->zbuffer++;
++}
++
++static void stbi__fill_bits(stbi__zbuf *z)
++{
++   do {
++      STBI_ASSERT(z->code_buffer < (1U << z->num_bits));
++      z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits;
++      z->num_bits += 8;
++   } while (z->num_bits <= 24);
++}
++
++stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n)
++{
++   unsigned int k;
++   if (z->num_bits < n) stbi__fill_bits(z);
++   k = z->code_buffer & ((1 << n) - 1);
++   z->code_buffer >>= n;
++   z->num_bits -= n;
++   return k;
++}
++
++static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z)
++{
++   int b,s,k;
++   // not resolved by fast table, so compute it the slow way
++   // use jpeg approach, which requires MSbits at top
++   k = stbi__bit_reverse(a->code_buffer, 16);
++   for (s=STBI__ZFAST_BITS+1; ; ++s)
++      if (k < z->maxcode[s])
++         break;
++   if (s == 16) return -1; // invalid code!
++   // code size is s, so:
++   b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
++   STBI_ASSERT(z->size[b] == s);
++   a->code_buffer >>= s;
++   a->num_bits -= s;
++   return z->value[b];
++}
++
++stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z)
++{
++   int b,s;
++   if (a->num_bits < 16) stbi__fill_bits(a);
++   b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
++   if (b) {
++      s = b >> 9;
++      a->code_buffer >>= s;
++      a->num_bits -= s;
++      return b & 511;
++   }
++   return stbi__zhuffman_decode_slowpath(a, z);
++}
++
++static int stbi__zexpand(stbi__zbuf *z, char *zout, int n)  // need to make room for n bytes
++{
++   char *q;
++   int cur, limit, old_limit;
++   z->zout = zout;
++   if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG");
++   cur   = (int) (z->zout     - z->zout_start);
++   limit = old_limit = (int) (z->zout_end - z->zout_start);
++   while (cur + n > limit)
++      limit *= 2;
++   q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit);
++   STBI_NOTUSED(old_limit);
++   if (q == NULL) return stbi__err("outofmem", "Out of memory");
++   z->zout_start = q;
++   z->zout       = q + cur;
++   z->zout_end   = q + limit;
++   return 1;
++}
++
++static const int stbi__zlength_base[31] = {
++   3,4,5,6,7,8,9,10,11,13,
++   15,17,19,23,27,31,35,43,51,59,
++   67,83,99,115,131,163,195,227,258,0,0 };
++
++static const int stbi__zlength_extra[31]=
++{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };
++
++static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,
++257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};
++
++static const int stbi__zdist_extra[32] =
++{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
++
++static int stbi__parse_huffman_block(stbi__zbuf *a)
++{
++   char *zout = a->zout;
++   for(;;) {
++      int z = stbi__zhuffman_decode(a, &a->z_length);
++      if (z < 256) {
++         if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes
++         if (zout >= a->zout_end) {
++            if (!stbi__zexpand(a, zout, 1)) return 0;
++            zout = a->zout;
++         }
++         *zout++ = (char) z;
++      } else {
++         stbi_uc *p;
++         int len,dist;
++         if (z == 256) {
++            a->zout = zout;
++            return 1;
++         }
++         z -= 257;
++         len = stbi__zlength_base[z];
++         if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]);
++         z = stbi__zhuffman_decode(a, &a->z_distance);
++         if (z < 0) return stbi__err("bad huffman code","Corrupt PNG");
++         dist = stbi__zdist_base[z];
++         if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]);
++         if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG");
++         if (zout + len > a->zout_end) {
++            if (!stbi__zexpand(a, zout, len)) return 0;
++            zout = a->zout;
++         }
++         p = (stbi_uc *) (zout - dist);
++         if (dist == 1) { // run of one byte; common in images.
++            stbi_uc v = *p;
++            if (len) { do *zout++ = v; while (--len); }
++         } else {
++            if (len) { do *zout++ = *p++; while (--len); }
++         }
++      }
++   }
++}
++
++static int stbi__compute_huffman_codes(stbi__zbuf *a)
++{
++   static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };
++   stbi__zhuffman z_codelength;
++   stbi_uc lencodes[286+32+137];//padding for maximum single op
++   stbi_uc codelength_sizes[19];
++   int i,n;
++
++   int hlit  = stbi__zreceive(a,5) + 257;
++   int hdist = stbi__zreceive(a,5) + 1;
++   int hclen = stbi__zreceive(a,4) + 4;
++   int ntot  = hlit + hdist;
++
++   memset(codelength_sizes, 0, sizeof(codelength_sizes));
++   for (i=0; i < hclen; ++i) {
++      int s = stbi__zreceive(a,3);
++      codelength_sizes[length_dezigzag[i]] = (stbi_uc) s;
++   }
++   if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0;
++
++   n = 0;
++   while (n < ntot) {
++      int c = stbi__zhuffman_decode(a, &z_codelength);
++      if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG");
++      if (c < 16)
++         lencodes[n++] = (stbi_uc) c;
++      else {
++         stbi_uc fill = 0;
++         if (c == 16) {
++            c = stbi__zreceive(a,2)+3;
++            if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG");
++            fill = lencodes[n-1];
++         } else if (c == 17)
++            c = stbi__zreceive(a,3)+3;
++         else {
++            STBI_ASSERT(c == 18);
++            c = stbi__zreceive(a,7)+11;
++         }
++         if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG");
++         memset(lencodes+n, fill, c);
++         n += c;
++      }
++   }
++   if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG");
++   if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0;
++   if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0;
++   return 1;
++}
++
++static int stbi__parse_uncompressed_block(stbi__zbuf *a)
++{
++   stbi_uc header[4];
++   int len,nlen,k;
++   if (a->num_bits & 7)
++      stbi__zreceive(a, a->num_bits & 7); // discard
++   // drain the bit-packed data into header
++   k = 0;
++   while (a->num_bits > 0) {
++      header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check
++      a->code_buffer >>= 8;
++      a->num_bits -= 8;
++   }
++   STBI_ASSERT(a->num_bits == 0);
++   // now fill header the normal way
++   while (k < 4)
++      header[k++] = stbi__zget8(a);
++   len  = header[1] * 256 + header[0];
++   nlen = header[3] * 256 + header[2];
++   if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG");
++   if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG");
++   if (a->zout + len > a->zout_end)
++      if (!stbi__zexpand(a, a->zout, len)) return 0;
++   memcpy(a->zout, a->zbuffer, len);
++   a->zbuffer += len;
++   a->zout += len;
++   return 1;
++}
++
++static int stbi__parse_zlib_header(stbi__zbuf *a)
++{
++   int cmf   = stbi__zget8(a);
++   int cm    = cmf & 15;
++   /* int cinfo = cmf >> 4; */
++   int flg   = stbi__zget8(a);
++   if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
++   if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png
++   if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png
++   // window = 1 << (8 + cinfo)... but who cares, we fully buffer output
++   return 1;
++}
++
++static const stbi_uc stbi__zdefault_length[288] =
++{
++   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
++   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
++   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
++   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
++   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
++   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
++   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
++   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
++   7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8
++};
++static const stbi_uc stbi__zdefault_distance[32] =
++{
++   5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5
++};
++/*
++Init algorithm:
++{
++   int i;   // use <= to match clearly with spec
++   for (i=0; i <= 143; ++i)     stbi__zdefault_length[i]   = 8;
++   for (   ; i <= 255; ++i)     stbi__zdefault_length[i]   = 9;
++   for (   ; i <= 279; ++i)     stbi__zdefault_length[i]   = 7;
++   for (   ; i <= 287; ++i)     stbi__zdefault_length[i]   = 8;
++
++   for (i=0; i <=  31; ++i)     stbi__zdefault_distance[i] = 5;
++}
++*/
++
++static int stbi__parse_zlib(stbi__zbuf *a, int parse_header)
++{
++   int final, type;
++   if (parse_header)
++      if (!stbi__parse_zlib_header(a)) return 0;
++   a->num_bits = 0;
++   a->code_buffer = 0;
++   do {
++      final = stbi__zreceive(a,1);
++      type = stbi__zreceive(a,2);
++      if (type == 0) {
++         if (!stbi__parse_uncompressed_block(a)) return 0;
++      } else if (type == 3) {
++         return 0;
++      } else {
++         if (type == 1) {
++            // use fixed code lengths
++            if (!stbi__zbuild_huffman(&a->z_length  , stbi__zdefault_length  , 288)) return 0;
++            if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance,  32)) return 0;
++         } else {
++            if (!stbi__compute_huffman_codes(a)) return 0;
++         }
++         if (!stbi__parse_huffman_block(a)) return 0;
++      }
++   } while (!final);
++   return 1;
++}
++
++static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header)
++{
++   a->zout_start = obuf;
++   a->zout       = obuf;
++   a->zout_end   = obuf + olen;
++   a->z_expandable = exp;
++
++   return stbi__parse_zlib(a, parse_header);
++}
++
++STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen)
++{
++   stbi__zbuf a;
++   char *p = (char *) stbi__malloc(initial_size);
++   if (p == NULL) return NULL;
++   a.zbuffer = (stbi_uc *) buffer;
++   a.zbuffer_end = (stbi_uc *) buffer + len;
++   if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
++      if (outlen) *outlen = (int) (a.zout - a.zout_start);
++      return a.zout_start;
++   } else {
++      STBI_FREE(a.zout_start);
++      return NULL;
++   }
++}
++
++STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
++{
++   return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen);
++}
++
++STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header)
++{
++   stbi__zbuf a;
++   char *p = (char *) stbi__malloc(initial_size);
++   if (p == NULL) return NULL;
++   a.zbuffer = (stbi_uc *) buffer;
++   a.zbuffer_end = (stbi_uc *) buffer + len;
++   if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
++      if (outlen) *outlen = (int) (a.zout - a.zout_start);
++      return a.zout_start;
++   } else {
++      STBI_FREE(a.zout_start);
++      return NULL;
++   }
++}
++
++STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
++{
++   stbi__zbuf a;
++   a.zbuffer = (stbi_uc *) ibuffer;
++   a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
++   if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
++      return (int) (a.zout - a.zout_start);
++   else
++      return -1;
++}
++
++STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
++{
++   stbi__zbuf a;
++   char *p = (char *) stbi__malloc(16384);
++   if (p == NULL) return NULL;
++   a.zbuffer = (stbi_uc *) buffer;
++   a.zbuffer_end = (stbi_uc *) buffer+len;
++   if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
++      if (outlen) *outlen = (int) (a.zout - a.zout_start);
++      return a.zout_start;
++   } else {
++      STBI_FREE(a.zout_start);
++      return NULL;
++   }
++}
++
++STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
++{
++   stbi__zbuf a;
++   a.zbuffer = (stbi_uc *) ibuffer;
++   a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
++   if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
++      return (int) (a.zout - a.zout_start);
++   else
++      return -1;
++}
++#endif
++
++// public domain "baseline" PNG decoder   v0.10  Sean Barrett 2006-11-18
++//    simple implementation
++//      - only 8-bit samples
++//      - no CRC checking
++//      - allocates lots of intermediate memory
++//        - avoids problem of streaming data between subsystems
++//        - avoids explicit window management
++//    performance
++//      - uses stb_zlib, a PD zlib implementation with fast huffman decoding
++
++#ifndef STBI_NO_PNG
++typedef struct
++{
++   stbi__uint32 length;
++   stbi__uint32 type;
++} stbi__pngchunk;
++
++static stbi__pngchunk stbi__get_chunk_header(stbi__context *s)
++{
++   stbi__pngchunk c;
++   c.length = stbi__get32be(s);
++   c.type   = stbi__get32be(s);
++   return c;
++}
++
++static int stbi__check_png_header(stbi__context *s)
++{
++   static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 };
++   int i;
++   for (i=0; i < 8; ++i)
++      if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG");
++   return 1;
++}
++
++typedef struct
++{
++   stbi__context *s;
++   stbi_uc *idata, *expanded, *out;
++   int depth;
++} stbi__png;
++
++
++enum {
++   STBI__F_none=0,
++   STBI__F_sub=1,
++   STBI__F_up=2,
++   STBI__F_avg=3,
++   STBI__F_paeth=4,
++   // synthetic filters used for first scanline to avoid needing a dummy row of 0s
++   STBI__F_avg_first,
++   STBI__F_paeth_first
++};
++
++static stbi_uc first_row_filter[5] =
++{
++   STBI__F_none,
++   STBI__F_sub,
++   STBI__F_none,
++   STBI__F_avg_first,
++   STBI__F_paeth_first
++};
++
++static int stbi__paeth(int a, int b, int c)
++{
++   int p = a + b - c;
++   int pa = abs(p-a);
++   int pb = abs(p-b);
++   int pc = abs(p-c);
++   if (pa <= pb && pa <= pc) return a;
++   if (pb <= pc) return b;
++   return c;
++}
++
++static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 };
++
++// create the png data from post-deflated data
++static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color)
++{
++   int bytes = (depth == 16? 2 : 1);
++   stbi__context *s = a->s;
++   stbi__uint32 i,j,stride = x*out_n*bytes;
++   stbi__uint32 img_len, img_width_bytes;
++   int k;
++   int img_n = s->img_n; // copy it into a local for later
++
++   int output_bytes = out_n*bytes;
++   int filter_bytes = img_n*bytes;
++   int width = x;
++
++   STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1);
++   a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into
++   if (!a->out) return stbi__err("outofmem", "Out of memory");
++
++   if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG");
++   img_width_bytes = (((img_n * x * depth) + 7) >> 3);
++   img_len = (img_width_bytes + 1) * y;
++
++   // we used to check for exact match between raw_len and img_len on non-interlaced PNGs,
++   // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros),
++   // so just check for raw_len < img_len always.
++   if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG");
++
++   for (j=0; j < y; ++j) {
++      stbi_uc *cur = a->out + stride*j;
++      stbi_uc *prior;
++      int filter = *raw++;
++
++      if (filter > 4)
++         return stbi__err("invalid filter","Corrupt PNG");
++
++      if (depth < 8) {
++         STBI_ASSERT(img_width_bytes <= x);
++         cur += x*out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place
++         filter_bytes = 1;
++         width = img_width_bytes;
++      }
++      prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above
++
++      // if first row, use special filter that doesn't sample previous row
++      if (j == 0) filter = first_row_filter[filter];
++
++      // handle first byte explicitly
++      for (k=0; k < filter_bytes; ++k) {
++         switch (filter) {
++            case STBI__F_none       : cur[k] = raw[k]; break;
++            case STBI__F_sub        : cur[k] = raw[k]; break;
++            case STBI__F_up         : cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break;
++            case STBI__F_avg        : cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); break;
++            case STBI__F_paeth      : cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0,prior[k],0)); break;
++            case STBI__F_avg_first  : cur[k] = raw[k]; break;
++            case STBI__F_paeth_first: cur[k] = raw[k]; break;
++         }
++      }
++
++      if (depth == 8) {
++         if (img_n != out_n)
++            cur[img_n] = 255; // first pixel
++         raw += img_n;
++         cur += out_n;
++         prior += out_n;
++      } else if (depth == 16) {
++         if (img_n != out_n) {
++            cur[filter_bytes]   = 255; // first pixel top byte
++            cur[filter_bytes+1] = 255; // first pixel bottom byte
++         }
++         raw += filter_bytes;
++         cur += output_bytes;
++         prior += output_bytes;
++      } else {
++         raw += 1;
++         cur += 1;
++         prior += 1;
++      }
++
++      // this is a little gross, so that we don't switch per-pixel or per-component
++      if (depth < 8 || img_n == out_n) {
++         int nk = (width - 1)*filter_bytes;
++         #define STBI__CASE(f) \
++             case f:     \
++                for (k=0; k < nk; ++k)
++         switch (filter) {
++            // "none" filter turns into a memcpy here; make that explicit.
++            case STBI__F_none:         memcpy(cur, raw, nk); break;
++            STBI__CASE(STBI__F_sub)          { cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); } break;
++            STBI__CASE(STBI__F_up)           { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break;
++            STBI__CASE(STBI__F_avg)          { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); } break;
++            STBI__CASE(STBI__F_paeth)        { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); } break;
++            STBI__CASE(STBI__F_avg_first)    { cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); } break;
++            STBI__CASE(STBI__F_paeth_first)  { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); } break;
++         }
++         #undef STBI__CASE
++         raw += nk;
++      } else {
++         STBI_ASSERT(img_n+1 == out_n);
++         #define STBI__CASE(f) \
++             case f:     \
++                for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \
++                   for (k=0; k < filter_bytes; ++k)
++         switch (filter) {
++            STBI__CASE(STBI__F_none)         { cur[k] = raw[k]; } break;
++            STBI__CASE(STBI__F_sub)          { cur[k] = STBI__BYTECAST(raw[k] + cur[k- output_bytes]); } break;
++            STBI__CASE(STBI__F_up)           { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break;
++            STBI__CASE(STBI__F_avg)          { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k- output_bytes])>>1)); } break;
++            STBI__CASE(STBI__F_paeth)        { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],prior[k],prior[k- output_bytes])); } break;
++            STBI__CASE(STBI__F_avg_first)    { cur[k] = STBI__BYTECAST(raw[k] + (cur[k- output_bytes] >> 1)); } break;
++            STBI__CASE(STBI__F_paeth_first)  { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],0,0)); } break;
++         }
++         #undef STBI__CASE
++
++         // the loop above sets the high byte of the pixels' alpha, but for
++         // 16 bit png files we also need the low byte set. we'll do that here.
++         if (depth == 16) {
++            cur = a->out + stride*j; // start at the beginning of the row again
++            for (i=0; i < x; ++i,cur+=output_bytes) {
++               cur[filter_bytes+1] = 255;
++            }
++         }
++      }
++   }
++
++   // we make a separate pass to expand bits to pixels; for performance,
++   // this could run two scanlines behind the above code, so it won't
++   // intefere with filtering but will still be in the cache.
++   if (depth < 8) {
++      for (j=0; j < y; ++j) {
++         stbi_uc *cur = a->out + stride*j;
++         stbi_uc *in  = a->out + stride*j + x*out_n - img_width_bytes;
++         // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit
++         // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop
++         stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range
++
++         // note that the final byte might overshoot and write more data than desired.
++         // we can allocate enough data that this never writes out of memory, but it
++         // could also overwrite the next scanline. can it overwrite non-empty data
++         // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel.
++         // so we need to explicitly clamp the final ones
++
++         if (depth == 4) {
++            for (k=x*img_n; k >= 2; k-=2, ++in) {
++               *cur++ = scale * ((*in >> 4)       );
++               *cur++ = scale * ((*in     ) & 0x0f);
++            }
++            if (k > 0) *cur++ = scale * ((*in >> 4)       );
++         } else if (depth == 2) {
++            for (k=x*img_n; k >= 4; k-=4, ++in) {
++               *cur++ = scale * ((*in >> 6)       );
++               *cur++ = scale * ((*in >> 4) & 0x03);
++               *cur++ = scale * ((*in >> 2) & 0x03);
++               *cur++ = scale * ((*in     ) & 0x03);
++            }
++            if (k > 0) *cur++ = scale * ((*in >> 6)       );
++            if (k > 1) *cur++ = scale * ((*in >> 4) & 0x03);
++            if (k > 2) *cur++ = scale * ((*in >> 2) & 0x03);
++         } else if (depth == 1) {
++            for (k=x*img_n; k >= 8; k-=8, ++in) {
++               *cur++ = scale * ((*in >> 7)       );
++               *cur++ = scale * ((*in >> 6) & 0x01);
++               *cur++ = scale * ((*in >> 5) & 0x01);
++               *cur++ = scale * ((*in >> 4) & 0x01);
++               *cur++ = scale * ((*in >> 3) & 0x01);
++               *cur++ = scale * ((*in >> 2) & 0x01);
++               *cur++ = scale * ((*in >> 1) & 0x01);
++               *cur++ = scale * ((*in     ) & 0x01);
++            }
++            if (k > 0) *cur++ = scale * ((*in >> 7)       );
++            if (k > 1) *cur++ = scale * ((*in >> 6) & 0x01);
++            if (k > 2) *cur++ = scale * ((*in >> 5) & 0x01);
++            if (k > 3) *cur++ = scale * ((*in >> 4) & 0x01);
++            if (k > 4) *cur++ = scale * ((*in >> 3) & 0x01);
++            if (k > 5) *cur++ = scale * ((*in >> 2) & 0x01);
++            if (k > 6) *cur++ = scale * ((*in >> 1) & 0x01);
++         }
++         if (img_n != out_n) {
++            int q;
++            // insert alpha = 255
++            cur = a->out + stride*j;
++            if (img_n == 1) {
++               for (q=x-1; q >= 0; --q) {
++                  cur[q*2+1] = 255;
++                  cur[q*2+0] = cur[q];
++               }
++            } else {
++               STBI_ASSERT(img_n == 3);
++               for (q=x-1; q >= 0; --q) {
++                  cur[q*4+3] = 255;
++                  cur[q*4+2] = cur[q*3+2];
++                  cur[q*4+1] = cur[q*3+1];
++                  cur[q*4+0] = cur[q*3+0];
++               }
++            }
++         }
++      }
++   } else if (depth == 16) {
++      // force the image data from big-endian to platform-native.
++      // this is done in a separate pass due to the decoding relying
++      // on the data being untouched, but could probably be done
++      // per-line during decode if care is taken.
++      stbi_uc *cur = a->out;
++      stbi__uint16 *cur16 = (stbi__uint16*)cur;
++
++      for(i=0; i < x*y*out_n; ++i,cur16++,cur+=2) {
++         *cur16 = (cur[0] << 8) | cur[1];
++      }
++   }
++
++   return 1;
++}
++
++static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced)
++{
++   int bytes = (depth == 16 ? 2 : 1);
++   int out_bytes = out_n * bytes;
++   stbi_uc *final;
++   int p;
++   if (!interlaced)
++      return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color);
++
++   // de-interlacing
++   final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
++   for (p=0; p < 7; ++p) {
++      int xorig[] = { 0,4,0,2,0,1,0 };
++      int yorig[] = { 0,0,4,0,2,0,1 };
++      int xspc[]  = { 8,8,4,4,2,2,1 };
++      int yspc[]  = { 8,8,8,4,4,2,2 };
++      int i,j,x,y;
++      // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
++      x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p];
++      y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p];
++      if (x && y) {
++         stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y;
++         if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) {
++            STBI_FREE(final);
++            return 0;
++         }
++         for (j=0; j < y; ++j) {
++            for (i=0; i < x; ++i) {
++               int out_y = j*yspc[p]+yorig[p];
++               int out_x = i*xspc[p]+xorig[p];
++               memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes,
++                      a->out + (j*x+i)*out_bytes, out_bytes);
++            }
++         }
++         STBI_FREE(a->out);
++         image_data += img_len;
++         image_data_len -= img_len;
++      }
++   }
++   a->out = final;
++
++   return 1;
++}
++
++static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n)
++{
++   stbi__context *s = z->s;
++   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
++   stbi_uc *p = z->out;
++
++   // compute color-based transparency, assuming we've
++   // already got 255 as the alpha value in the output
++   STBI_ASSERT(out_n == 2 || out_n == 4);
++
++   if (out_n == 2) {
++      for (i=0; i < pixel_count; ++i) {
++         p[1] = (p[0] == tc[0] ? 0 : 255);
++         p += 2;
++      }
++   } else {
++      for (i=0; i < pixel_count; ++i) {
++         if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
++            p[3] = 0;
++         p += 4;
++      }
++   }
++   return 1;
++}
++
++static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n)
++{
++   stbi__context *s = z->s;
++   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
++   stbi__uint16 *p = (stbi__uint16*) z->out;
++
++   // compute color-based transparency, assuming we've
++   // already got 65535 as the alpha value in the output
++   STBI_ASSERT(out_n == 2 || out_n == 4);
++
++   if (out_n == 2) {
++      for (i = 0; i < pixel_count; ++i) {
++         p[1] = (p[0] == tc[0] ? 0 : 65535);
++         p += 2;
++      }
++   } else {
++      for (i = 0; i < pixel_count; ++i) {
++         if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
++            p[3] = 0;
++         p += 4;
++      }
++   }
++   return 1;
++}
++
++static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n)
++{
++   stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
++   stbi_uc *p, *temp_out, *orig = a->out;
++
++   p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0);
++   if (p == NULL) return stbi__err("outofmem", "Out of memory");
++
++   // between here and free(out) below, exitting would leak
++   temp_out = p;
++
++   if (pal_img_n == 3) {
++      for (i=0; i < pixel_count; ++i) {
++         int n = orig[i]*4;
++         p[0] = palette[n  ];
++         p[1] = palette[n+1];
++         p[2] = palette[n+2];
++         p += 3;
++      }
++   } else {
++      for (i=0; i < pixel_count; ++i) {
++         int n = orig[i]*4;
++         p[0] = palette[n  ];
++         p[1] = palette[n+1];
++         p[2] = palette[n+2];
++         p[3] = palette[n+3];
++         p += 4;
++      }
++   }
++   STBI_FREE(a->out);
++   a->out = temp_out;
++
++   STBI_NOTUSED(len);
++
++   return 1;
++}
++
++static int stbi__unpremultiply_on_load = 0;
++static int stbi__de_iphone_flag = 0;
++
++STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
++{
++   stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply;
++}
++
++STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
++{
++   stbi__de_iphone_flag = flag_true_if_should_convert;
++}
++
++static void stbi__de_iphone(stbi__png *z)
++{
++   stbi__context *s = z->s;
++   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
++   stbi_uc *p = z->out;
++
++   if (s->img_out_n == 3) {  // convert bgr to rgb
++      for (i=0; i < pixel_count; ++i) {
++         stbi_uc t = p[0];
++         p[0] = p[2];
++         p[2] = t;
++         p += 3;
++      }
++   } else {
++      STBI_ASSERT(s->img_out_n == 4);
++      if (stbi__unpremultiply_on_load) {
++         // convert bgr to rgb and unpremultiply
++         for (i=0; i < pixel_count; ++i) {
++            stbi_uc a = p[3];
++            stbi_uc t = p[0];
++            if (a) {
++               stbi_uc half = a / 2;
++               p[0] = (p[2] * 255 + half) / a;
++               p[1] = (p[1] * 255 + half) / a;
++               p[2] = ( t   * 255 + half) / a;
++            } else {
++               p[0] = p[2];
++               p[2] = t;
++            }
++            p += 4;
++         }
++      } else {
++         // convert bgr to rgb
++         for (i=0; i < pixel_count; ++i) {
++            stbi_uc t = p[0];
++            p[0] = p[2];
++            p[2] = t;
++            p += 4;
++         }
++      }
++   }
++}
++
++#define STBI__PNG_TYPE(a,b,c,d)  (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d))
++
++static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp)
++{
++   stbi_uc palette[1024], pal_img_n=0;
++   stbi_uc has_trans=0, tc[3]={0};
++   stbi__uint16 tc16[3];
++   stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0;
++   int first=1,k,interlace=0, color=0, is_iphone=0;
++   stbi__context *s = z->s;
++
++   z->expanded = NULL;
++   z->idata = NULL;
++   z->out = NULL;
++
++   if (!stbi__check_png_header(s)) return 0;
++
++   if (scan == STBI__SCAN_type) return 1;
++
++   for (;;) {
++      stbi__pngchunk c = stbi__get_chunk_header(s);
++      switch (c.type) {
++         case STBI__PNG_TYPE('C','g','B','I'):
++            is_iphone = 1;
++            stbi__skip(s, c.length);
++            break;
++         case STBI__PNG_TYPE('I','H','D','R'): {
++            int comp,filter;
++            if (!first) return stbi__err("multiple IHDR","Corrupt PNG");
++            first = 0;
++            if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG");
++            s->img_x = stbi__get32be(s); if (s->img_x > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)");
++            s->img_y = stbi__get32be(s); if (s->img_y > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)");
++            z->depth = stbi__get8(s);  if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16)  return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only");
++            color = stbi__get8(s);  if (color > 6)         return stbi__err("bad ctype","Corrupt PNG");
++            if (color == 3 && z->depth == 16)                  return stbi__err("bad ctype","Corrupt PNG");
++            if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG");
++            comp  = stbi__get8(s);  if (comp) return stbi__err("bad comp method","Corrupt PNG");
++            filter= stbi__get8(s);  if (filter) return stbi__err("bad filter method","Corrupt PNG");
++            interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG");
++            if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG");
++            if (!pal_img_n) {
++               s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
++               if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode");
++               if (scan == STBI__SCAN_header) return 1;
++            } else {
++               // if paletted, then pal_n is our final components, and
++               // img_n is # components to decompress/filter.
++               s->img_n = 1;
++               if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG");
++               // if SCAN_header, have to scan to see if we have a tRNS
++            }
++            break;
++         }
++
++         case STBI__PNG_TYPE('P','L','T','E'):  {
++            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++            if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG");
++            pal_len = c.length / 3;
++            if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG");
++            for (i=0; i < pal_len; ++i) {
++               palette[i*4+0] = stbi__get8(s);
++               palette[i*4+1] = stbi__get8(s);
++               palette[i*4+2] = stbi__get8(s);
++               palette[i*4+3] = 255;
++            }
++            break;
++         }
++
++         case STBI__PNG_TYPE('t','R','N','S'): {
++            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++            if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG");
++            if (pal_img_n) {
++               if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; }
++               if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG");
++               if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG");
++               pal_img_n = 4;
++               for (i=0; i < c.length; ++i)
++                  palette[i*4+3] = stbi__get8(s);
++            } else {
++               if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG");
++               if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG");
++               has_trans = 1;
++               if (z->depth == 16) {
++                  for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
++               } else {
++                  for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
++               }
++            }
++            break;
++         }
++
++         case STBI__PNG_TYPE('I','D','A','T'): {
++            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++            if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG");
++            if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; }
++            if ((int)(ioff + c.length) < (int)ioff) return 0;
++            if (ioff + c.length > idata_limit) {
++               stbi__uint32 idata_limit_old = idata_limit;
++               stbi_uc *p;
++               if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096;
++               while (ioff + c.length > idata_limit)
++                  idata_limit *= 2;
++               STBI_NOTUSED(idata_limit_old);
++               p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory");
++               z->idata = p;
++            }
++            if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG");
++            ioff += c.length;
++            break;
++         }
++
++         case STBI__PNG_TYPE('I','E','N','D'): {
++            stbi__uint32 raw_len, bpl;
++            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++            if (scan != STBI__SCAN_load) return 1;
++            if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG");
++            // initial guess for decoded data size to avoid unnecessary reallocs
++            bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component
++            raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */;
++            z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone);
++            if (z->expanded == NULL) return 0; // zlib should set error
++            STBI_FREE(z->idata); z->idata = NULL;
++            if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans)
++               s->img_out_n = s->img_n+1;
++            else
++               s->img_out_n = s->img_n;
++            if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0;
++            if (has_trans) {
++               if (z->depth == 16) {
++                  if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0;
++               } else {
++                  if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0;
++               }
++            }
++            if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
++               stbi__de_iphone(z);
++            if (pal_img_n) {
++               // pal_img_n == 3 or 4
++               s->img_n = pal_img_n; // record the actual colors we had
++               s->img_out_n = pal_img_n;
++               if (req_comp >= 3) s->img_out_n = req_comp;
++               if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n))
++                  return 0;
++            } else if (has_trans) {
++               // non-paletted image with tRNS -> source image has (constant) alpha
++               ++s->img_n;
++            }
++            STBI_FREE(z->expanded); z->expanded = NULL;
++            return 1;
++         }
++
++         default:
++            // if critical, fail
++            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++            if ((c.type & (1 << 29)) == 0) {
++               #ifndef STBI_NO_FAILURE_STRINGS
++               // not threadsafe
++               static char invalid_chunk[] = "XXXX PNG chunk not known";
++               invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
++               invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
++               invalid_chunk[2] = STBI__BYTECAST(c.type >>  8);
++               invalid_chunk[3] = STBI__BYTECAST(c.type >>  0);
++               #endif
++               return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type");
++            }
++            stbi__skip(s, c.length);
++            break;
++      }
++      // end of PNG chunk, read and skip CRC
++      stbi__get32be(s);
++   }
++}
++
++static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri)
++{
++   void *result=NULL;
++   if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
++   if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) {
++      if (p->depth < 8)
++         ri->bits_per_channel = 8;
++      else
++         ri->bits_per_channel = p->depth;
++      result = p->out;
++      p->out = NULL;
++      if (req_comp && req_comp != p->s->img_out_n) {
++         if (ri->bits_per_channel == 8)
++            result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
++         else
++            result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
++         p->s->img_out_n = req_comp;
++         if (result == NULL) return result;
++      }
++      *x = p->s->img_x;
++      *y = p->s->img_y;
++      if (n) *n = p->s->img_n;
++   }
++   STBI_FREE(p->out);      p->out      = NULL;
++   STBI_FREE(p->expanded); p->expanded = NULL;
++   STBI_FREE(p->idata);    p->idata    = NULL;
++
++   return result;
++}
++
++static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++   stbi__png p;
++   p.s = s;
++   return stbi__do_png(&p, x,y,comp,req_comp, ri);
++}
++
++static int stbi__png_test(stbi__context *s)
++{
++   int r;
++   r = stbi__check_png_header(s);
++   stbi__rewind(s);
++   return r;
++}
++
++static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp)
++{
++   if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) {
++      stbi__rewind( p->s );
++      return 0;
++   }
++   if (x) *x = p->s->img_x;
++   if (y) *y = p->s->img_y;
++   if (comp) *comp = p->s->img_n;
++   return 1;
++}
++
++static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp)
++{
++   stbi__png p;
++   p.s = s;
++   return stbi__png_info_raw(&p, x, y, comp);
++}
++
++static int stbi__png_is16(stbi__context *s)
++{
++   stbi__png p;
++   p.s = s;
++   if (!stbi__png_info_raw(&p, NULL, NULL, NULL))
++	   return 0;
++   if (p.depth != 16) {
++      stbi__rewind(p.s);
++      return 0;
++   }
++   return 1;
++}
++#endif
++
++// Microsoft/Windows BMP image
++
++#ifndef STBI_NO_BMP
++static int stbi__bmp_test_raw(stbi__context *s)
++{
++   int r;
++   int sz;
++   if (stbi__get8(s) != 'B') return 0;
++   if (stbi__get8(s) != 'M') return 0;
++   stbi__get32le(s); // discard filesize
++   stbi__get16le(s); // discard reserved
++   stbi__get16le(s); // discard reserved
++   stbi__get32le(s); // discard data offset
++   sz = stbi__get32le(s);
++   r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124);
++   return r;
++}
++
++static int stbi__bmp_test(stbi__context *s)
++{
++   int r = stbi__bmp_test_raw(s);
++   stbi__rewind(s);
++   return r;
++}
++
++
++// returns 0..31 for the highest set bit
++static int stbi__high_bit(unsigned int z)
++{
++   int n=0;
++   if (z == 0) return -1;
++   if (z >= 0x10000) { n += 16; z >>= 16; }
++   if (z >= 0x00100) { n +=  8; z >>=  8; }
++   if (z >= 0x00010) { n +=  4; z >>=  4; }
++   if (z >= 0x00004) { n +=  2; z >>=  2; }
++   if (z >= 0x00002) { n +=  1; z >>=  1; }
++   return n;
++}
++
++static int stbi__bitcount(unsigned int a)
++{
++   a = (a & 0x55555555) + ((a >>  1) & 0x55555555); // max 2
++   a = (a & 0x33333333) + ((a >>  2) & 0x33333333); // max 4
++   a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits
++   a = (a + (a >> 8)); // max 16 per 8 bits
++   a = (a + (a >> 16)); // max 32 per 8 bits
++   return a & 0xff;
++}
++
++// extract an arbitrarily-aligned N-bit value (N=bits)
++// from v, and then make it 8-bits long and fractionally
++// extend it to full full range.
++static int stbi__shiftsigned(unsigned int v, int shift, int bits)
++{
++   static unsigned int mul_table[9] = {
++      0,
++      0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/,
++      0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/,
++   };
++   static unsigned int shift_table[9] = {
++      0, 0,0,1,0,2,4,6,0,
++   };
++   if (shift < 0)
++      v <<= -shift;
++   else
++      v >>= shift;
++   STBI_ASSERT(v >= 0 && v < 256);
++   v >>= (8-bits);
++   STBI_ASSERT(bits >= 0 && bits <= 8);
++   return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits];
++}
++
++typedef struct
++{
++   int bpp, offset, hsz;
++   unsigned int mr,mg,mb,ma, all_a;
++} stbi__bmp_data;
++
++static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
++{
++   int hsz;
++   if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP");
++   stbi__get32le(s); // discard filesize
++   stbi__get16le(s); // discard reserved
++   stbi__get16le(s); // discard reserved
++   info->offset = stbi__get32le(s);
++   info->hsz = hsz = stbi__get32le(s);
++   info->mr = info->mg = info->mb = info->ma = 0;
++
++   if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
++   if (hsz == 12) {
++      s->img_x = stbi__get16le(s);
++      s->img_y = stbi__get16le(s);
++   } else {
++      s->img_x = stbi__get32le(s);
++      s->img_y = stbi__get32le(s);
++   }
++   if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP");
++   info->bpp = stbi__get16le(s);
++   if (hsz != 12) {
++      int compress = stbi__get32le(s);
++      if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
++      stbi__get32le(s); // discard sizeof
++      stbi__get32le(s); // discard hres
++      stbi__get32le(s); // discard vres
++      stbi__get32le(s); // discard colorsused
++      stbi__get32le(s); // discard max important
++      if (hsz == 40 || hsz == 56) {
++         if (hsz == 56) {
++            stbi__get32le(s);
++            stbi__get32le(s);
++            stbi__get32le(s);
++            stbi__get32le(s);
++         }
++         if (info->bpp == 16 || info->bpp == 32) {
++            if (compress == 0) {
++               if (info->bpp == 32) {
++                  info->mr = 0xffu << 16;
++                  info->mg = 0xffu <<  8;
++                  info->mb = 0xffu <<  0;
++                  info->ma = 0xffu << 24;
++                  info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0
++               } else {
++                  info->mr = 31u << 10;
++                  info->mg = 31u <<  5;
++                  info->mb = 31u <<  0;
++               }
++            } else if (compress == 3) {
++               info->mr = stbi__get32le(s);
++               info->mg = stbi__get32le(s);
++               info->mb = stbi__get32le(s);
++               // not documented, but generated by photoshop and handled by mspaint
++               if (info->mr == info->mg && info->mg == info->mb) {
++                  // ?!?!?
++                  return stbi__errpuc("bad BMP", "bad BMP");
++               }
++            } else
++               return stbi__errpuc("bad BMP", "bad BMP");
++         }
++      } else {
++         int i;
++         if (hsz != 108 && hsz != 124)
++            return stbi__errpuc("bad BMP", "bad BMP");
++         info->mr = stbi__get32le(s);
++         info->mg = stbi__get32le(s);
++         info->mb = stbi__get32le(s);
++         info->ma = stbi__get32le(s);
++         stbi__get32le(s); // discard color space
++         for (i=0; i < 12; ++i)
++            stbi__get32le(s); // discard color space parameters
++         if (hsz == 124) {
++            stbi__get32le(s); // discard rendering intent
++            stbi__get32le(s); // discard offset of profile data
++            stbi__get32le(s); // discard size of profile data
++            stbi__get32le(s); // discard reserved
++         }
++      }
++   }
++   return (void *) 1;
++}
++
++
++static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++   stbi_uc *out;
++   unsigned int mr=0,mg=0,mb=0,ma=0, all_a;
++   stbi_uc pal[256][4];
++   int psize=0,i,j,width;
++   int flip_vertically, pad, target;
++   stbi__bmp_data info;
++   STBI_NOTUSED(ri);
++
++   info.all_a = 255;
++   if (stbi__bmp_parse_header(s, &info) == NULL)
++      return NULL; // error code already set
++
++   flip_vertically = ((int) s->img_y) > 0;
++   s->img_y = abs((int) s->img_y);
++
++   mr = info.mr;
++   mg = info.mg;
++   mb = info.mb;
++   ma = info.ma;
++   all_a = info.all_a;
++
++   if (info.hsz == 12) {
++      if (info.bpp < 24)
++         psize = (info.offset - 14 - 24) / 3;
++   } else {
++      if (info.bpp < 16)
++         psize = (info.offset - 14 - info.hsz) >> 2;
++   }
++
++   s->img_n = ma ? 4 : 3;
++   if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
++      target = req_comp;
++   else
++      target = s->img_n; // if they want monochrome, we'll post-convert
++
++   // sanity-check size
++   if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0))
++      return stbi__errpuc("too large", "Corrupt BMP");
++
++   out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0);
++   if (!out) return stbi__errpuc("outofmem", "Out of memory");
++   if (info.bpp < 16) {
++      int z=0;
++      if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); }
++      for (i=0; i < psize; ++i) {
++         pal[i][2] = stbi__get8(s);
++         pal[i][1] = stbi__get8(s);
++         pal[i][0] = stbi__get8(s);
++         if (info.hsz != 12) stbi__get8(s);
++         pal[i][3] = 255;
++      }
++      stbi__skip(s, info.offset - 14 - info.hsz - psize * (info.hsz == 12 ? 3 : 4));
++      if (info.bpp == 1) width = (s->img_x + 7) >> 3;
++      else if (info.bpp == 4) width = (s->img_x + 1) >> 1;
++      else if (info.bpp == 8) width = s->img_x;
++      else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); }
++      pad = (-width)&3;
++      if (info.bpp == 1) {
++         for (j=0; j < (int) s->img_y; ++j) {
++            int bit_offset = 7, v = stbi__get8(s);
++            for (i=0; i < (int) s->img_x; ++i) {
++               int color = (v>>bit_offset)&0x1;
++               out[z++] = pal[color][0];
++               out[z++] = pal[color][1];
++               out[z++] = pal[color][2];
++               if (target == 4) out[z++] = 255;
++               if (i+1 == (int) s->img_x) break;
++               if((--bit_offset) < 0) {
++                  bit_offset = 7;
++                  v = stbi__get8(s);
++               }
++            }
++            stbi__skip(s, pad);
++         }
++      } else {
++         for (j=0; j < (int) s->img_y; ++j) {
++            for (i=0; i < (int) s->img_x; i += 2) {
++               int v=stbi__get8(s),v2=0;
++               if (info.bpp == 4) {
++                  v2 = v & 15;
++                  v >>= 4;
++               }
++               out[z++] = pal[v][0];
++               out[z++] = pal[v][1];
++               out[z++] = pal[v][2];
++               if (target == 4) out[z++] = 255;
++               if (i+1 == (int) s->img_x) break;
++               v = (info.bpp == 8) ? stbi__get8(s) : v2;
++               out[z++] = pal[v][0];
++               out[z++] = pal[v][1];
++               out[z++] = pal[v][2];
++               if (target == 4) out[z++] = 255;
++            }
++            stbi__skip(s, pad);
++         }
++      }
++   } else {
++      int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0;
++      int z = 0;
++      int easy=0;
++      stbi__skip(s, info.offset - 14 - info.hsz);
++      if (info.bpp == 24) width = 3 * s->img_x;
++      else if (info.bpp == 16) width = 2*s->img_x;
++      else /* bpp = 32 and pad = 0 */ width=0;
++      pad = (-width) & 3;
++      if (info.bpp == 24) {
++         easy = 1;
++      } else if (info.bpp == 32) {
++         if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
++            easy = 2;
++      }
++      if (!easy) {
++         if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
++         // right shift amt to put high bit in position #7
++         rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr);
++         gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg);
++         bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb);
++         ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma);
++      }
++      for (j=0; j < (int) s->img_y; ++j) {
++         if (easy) {
++            for (i=0; i < (int) s->img_x; ++i) {
++               unsigned char a;
++               out[z+2] = stbi__get8(s);
++               out[z+1] = stbi__get8(s);
++               out[z+0] = stbi__get8(s);
++               z += 3;
++               a = (easy == 2 ? stbi__get8(s) : 255);
++               all_a |= a;
++               if (target == 4) out[z++] = a;
++            }
++         } else {
++            int bpp = info.bpp;
++            for (i=0; i < (int) s->img_x; ++i) {
++               stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s));
++               unsigned int a;
++               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount));
++               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount));
++               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount));
++               a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
++               all_a |= a;
++               if (target == 4) out[z++] = STBI__BYTECAST(a);
++            }
++         }
++         stbi__skip(s, pad);
++      }
++   }
++
++   // if alpha channel is all 0s, replace with all 255s
++   if (target == 4 && all_a == 0)
++      for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4)
++         out[i] = 255;
++
++   if (flip_vertically) {
++      stbi_uc t;
++      for (j=0; j < (int) s->img_y>>1; ++j) {
++         stbi_uc *p1 = out +      j     *s->img_x*target;
++         stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target;
++         for (i=0; i < (int) s->img_x*target; ++i) {
++            t = p1[i]; p1[i] = p2[i]; p2[i] = t;
++         }
++      }
++   }
++
++   if (req_comp && req_comp != target) {
++      out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
++      if (out == NULL) return out; // stbi__convert_format frees input on failure
++   }
++
++   *x = s->img_x;
++   *y = s->img_y;
++   if (comp) *comp = s->img_n;
++   return out;
++}
++#endif
++
++// Targa Truevision - TGA
++// by Jonathan Dummer
++#ifndef STBI_NO_TGA
++// returns STBI_rgb or whatever, 0 on error
++static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16)
++{
++   // only RGB or RGBA (incl. 16bit) or grey allowed
++   if (is_rgb16) *is_rgb16 = 0;
++   switch(bits_per_pixel) {
++      case 8:  return STBI_grey;
++      case 16: if(is_grey) return STBI_grey_alpha;
++               // fallthrough
++      case 15: if(is_rgb16) *is_rgb16 = 1;
++               return STBI_rgb;
++      case 24: // fallthrough
++      case 32: return bits_per_pixel/8;
++      default: return 0;
++   }
++}
++
++static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp)
++{
++    int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp;
++    int sz, tga_colormap_type;
++    stbi__get8(s);                   // discard Offset
++    tga_colormap_type = stbi__get8(s); // colormap type
++    if( tga_colormap_type > 1 ) {
++        stbi__rewind(s);
++        return 0;      // only RGB or indexed allowed
++    }
++    tga_image_type = stbi__get8(s); // image type
++    if ( tga_colormap_type == 1 ) { // colormapped (paletted) image
++        if (tga_image_type != 1 && tga_image_type != 9) {
++            stbi__rewind(s);
++            return 0;
++        }
++        stbi__skip(s,4);       // skip index of first colormap entry and number of entries
++        sz = stbi__get8(s);    //   check bits per palette color entry
++        if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) {
++            stbi__rewind(s);
++            return 0;
++        }
++        stbi__skip(s,4);       // skip image x and y origin
++        tga_colormap_bpp = sz;
++    } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE
++        if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) {
++            stbi__rewind(s);
++            return 0; // only RGB or grey allowed, +/- RLE
++        }
++        stbi__skip(s,9); // skip colormap specification and image x/y origin
++        tga_colormap_bpp = 0;
++    }
++    tga_w = stbi__get16le(s);
++    if( tga_w < 1 ) {
++        stbi__rewind(s);
++        return 0;   // test width
++    }
++    tga_h = stbi__get16le(s);
++    if( tga_h < 1 ) {
++        stbi__rewind(s);
++        return 0;   // test height
++    }
++    tga_bits_per_pixel = stbi__get8(s); // bits per pixel
++    stbi__get8(s); // ignore alpha bits
++    if (tga_colormap_bpp != 0) {
++        if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) {
++            // when using a colormap, tga_bits_per_pixel is the size of the indexes
++            // I don't think anything but 8 or 16bit indexes makes sense
++            stbi__rewind(s);
++            return 0;
++        }
++        tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL);
++    } else {
++        tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL);
++    }
++    if(!tga_comp) {
++      stbi__rewind(s);
++      return 0;
++    }
++    if (x) *x = tga_w;
++    if (y) *y = tga_h;
++    if (comp) *comp = tga_comp;
++    return 1;                   // seems to have passed everything
++}
++
++static int stbi__tga_test(stbi__context *s)
++{
++   int res = 0;
++   int sz, tga_color_type;
++   stbi__get8(s);      //   discard Offset
++   tga_color_type = stbi__get8(s);   //   color type
++   if ( tga_color_type > 1 ) goto errorEnd;   //   only RGB or indexed allowed
++   sz = stbi__get8(s);   //   image type
++   if ( tga_color_type == 1 ) { // colormapped (paletted) image
++      if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9
++      stbi__skip(s,4);       // skip index of first colormap entry and number of entries
++      sz = stbi__get8(s);    //   check bits per palette color entry
++      if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
++      stbi__skip(s,4);       // skip image x and y origin
++   } else { // "normal" image w/o colormap
++      if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE
++      stbi__skip(s,9); // skip colormap specification and image x/y origin
++   }
++   if ( stbi__get16le(s) < 1 ) goto errorEnd;      //   test width
++   if ( stbi__get16le(s) < 1 ) goto errorEnd;      //   test height
++   sz = stbi__get8(s);   //   bits per pixel
++   if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index
++   if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
++
++   res = 1; // if we got this far, everything's good and we can return 1 instead of 0
++
++errorEnd:
++   stbi__rewind(s);
++   return res;
++}
++
++// read 16bit value and convert to 24bit RGB
++static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out)
++{
++   stbi__uint16 px = (stbi__uint16)stbi__get16le(s);
++   stbi__uint16 fiveBitMask = 31;
++   // we have 3 channels with 5bits each
++   int r = (px >> 10) & fiveBitMask;
++   int g = (px >> 5) & fiveBitMask;
++   int b = px & fiveBitMask;
++   // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later
++   out[0] = (stbi_uc)((r * 255)/31);
++   out[1] = (stbi_uc)((g * 255)/31);
++   out[2] = (stbi_uc)((b * 255)/31);
++
++   // some people claim that the most significant bit might be used for alpha
++   // (possibly if an alpha-bit is set in the "image descriptor byte")
++   // but that only made 16bit test images completely translucent..
++   // so let's treat all 15 and 16bit TGAs as RGB with no alpha.
++}
++
++static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++   //   read in the TGA header stuff
++   int tga_offset = stbi__get8(s);
++   int tga_indexed = stbi__get8(s);
++   int tga_image_type = stbi__get8(s);
++   int tga_is_RLE = 0;
++   int tga_palette_start = stbi__get16le(s);
++   int tga_palette_len = stbi__get16le(s);
++   int tga_palette_bits = stbi__get8(s);
++   int tga_x_origin = stbi__get16le(s);
++   int tga_y_origin = stbi__get16le(s);
++   int tga_width = stbi__get16le(s);
++   int tga_height = stbi__get16le(s);
++   int tga_bits_per_pixel = stbi__get8(s);
++   int tga_comp, tga_rgb16=0;
++   int tga_inverted = stbi__get8(s);
++   // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?)
++   //   image data
++   unsigned char *tga_data;
++   unsigned char *tga_palette = NULL;
++   int i, j;
++   unsigned char raw_data[4] = {0};
++   int RLE_count = 0;
++   int RLE_repeating = 0;
++   int read_next_pixel = 1;
++   STBI_NOTUSED(ri);
++
++   //   do a tiny bit of precessing
++   if ( tga_image_type >= 8 )
++   {
++      tga_image_type -= 8;
++      tga_is_RLE = 1;
++   }
++   tga_inverted = 1 - ((tga_inverted >> 5) & 1);
++
++   //   If I'm paletted, then I'll use the number of bits from the palette
++   if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
++   else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16);
++
++   if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency
++      return stbi__errpuc("bad format", "Can't find out TGA pixelformat");
++
++   //   tga info
++   *x = tga_width;
++   *y = tga_height;
++   if (comp) *comp = tga_comp;
++
++   if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0))
++      return stbi__errpuc("too large", "Corrupt TGA");
++
++   tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
++   if (!tga_data) return stbi__errpuc("outofmem", "Out of memory");
++
++   // skip to the data's starting position (offset usually = 0)
++   stbi__skip(s, tga_offset );
++
++   if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) {
++      for (i=0; i < tga_height; ++i) {
++         int row = tga_inverted ? tga_height -i - 1 : i;
++         stbi_uc *tga_row = tga_data + row*tga_width*tga_comp;
++         stbi__getn(s, tga_row, tga_width * tga_comp);
++      }
++   } else  {
++      //   do I need to load a palette?
++      if ( tga_indexed)
++      {
++         //   any data to skip? (offset usually = 0)
++         stbi__skip(s, tga_palette_start );
++         //   load the palette
++         tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
++         if (!tga_palette) {
++            STBI_FREE(tga_data);
++            return stbi__errpuc("outofmem", "Out of memory");
++         }
++         if (tga_rgb16) {
++            stbi_uc *pal_entry = tga_palette;
++            STBI_ASSERT(tga_comp == STBI_rgb);
++            for (i=0; i < tga_palette_len; ++i) {
++               stbi__tga_read_rgb16(s, pal_entry);
++               pal_entry += tga_comp;
++            }
++         } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) {
++               STBI_FREE(tga_data);
++               STBI_FREE(tga_palette);
++               return stbi__errpuc("bad palette", "Corrupt TGA");
++         }
++      }
++      //   load the data
++      for (i=0; i < tga_width * tga_height; ++i)
++      {
++         //   if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
++         if ( tga_is_RLE )
++         {
++            if ( RLE_count == 0 )
++            {
++               //   yep, get the next byte as a RLE command
++               int RLE_cmd = stbi__get8(s);
++               RLE_count = 1 + (RLE_cmd & 127);
++               RLE_repeating = RLE_cmd >> 7;
++               read_next_pixel = 1;
++            } else if ( !RLE_repeating )
++            {
++               read_next_pixel = 1;
++            }
++         } else
++         {
++            read_next_pixel = 1;
++         }
++         //   OK, if I need to read a pixel, do it now
++         if ( read_next_pixel )
++         {
++            //   load however much data we did have
++            if ( tga_indexed )
++            {
++               // read in index, then perform the lookup
++               int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s);
++               if ( pal_idx >= tga_palette_len ) {
++                  // invalid index
++                  pal_idx = 0;
++               }
++               pal_idx *= tga_comp;
++               for (j = 0; j < tga_comp; ++j) {
++                  raw_data[j] = tga_palette[pal_idx+j];
++               }
++            } else if(tga_rgb16) {
++               STBI_ASSERT(tga_comp == STBI_rgb);
++               stbi__tga_read_rgb16(s, raw_data);
++            } else {
++               //   read in the data raw
++               for (j = 0; j < tga_comp; ++j) {
++                  raw_data[j] = stbi__get8(s);
++               }
++            }
++            //   clear the reading flag for the next pixel
++            read_next_pixel = 0;
++         } // end of reading a pixel
++
++         // copy data
++         for (j = 0; j < tga_comp; ++j)
++           tga_data[i*tga_comp+j] = raw_data[j];
++
++         //   in case we're in RLE mode, keep counting down
++         --RLE_count;
++      }
++      //   do I need to invert the image?
++      if ( tga_inverted )
++      {
++         for (j = 0; j*2 < tga_height; ++j)
++         {
++            int index1 = j * tga_width * tga_comp;
++            int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
++            for (i = tga_width * tga_comp; i > 0; --i)
++            {
++               unsigned char temp = tga_data[index1];
++               tga_data[index1] = tga_data[index2];
++               tga_data[index2] = temp;
++               ++index1;
++               ++index2;
++            }
++         }
++      }
++      //   clear my palette, if I had one
++      if ( tga_palette != NULL )
++      {
++         STBI_FREE( tga_palette );
++      }
++   }
++
++   // swap RGB - if the source data was RGB16, it already is in the right order
++   if (tga_comp >= 3 && !tga_rgb16)
++   {
++      unsigned char* tga_pixel = tga_data;
++      for (i=0; i < tga_width * tga_height; ++i)
++      {
++         unsigned char temp = tga_pixel[0];
++         tga_pixel[0] = tga_pixel[2];
++         tga_pixel[2] = temp;
++         tga_pixel += tga_comp;
++      }
++   }
++
++   // convert to target component count
++   if (req_comp && req_comp != tga_comp)
++      tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height);
++
++   //   the things I do to get rid of an error message, and yet keep
++   //   Microsoft's C compilers happy... [8^(
++   tga_palette_start = tga_palette_len = tga_palette_bits =
++         tga_x_origin = tga_y_origin = 0;
++   //   OK, done
++   return tga_data;
++}
++#endif
++
++// *************************************************************************************************
++// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB
++
++#ifndef STBI_NO_PSD
++static int stbi__psd_test(stbi__context *s)
++{
++   int r = (stbi__get32be(s) == 0x38425053);
++   stbi__rewind(s);
++   return r;
++}
++
++static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount)
++{
++   int count, nleft, len;
++
++   count = 0;
++   while ((nleft = pixelCount - count) > 0) {
++      len = stbi__get8(s);
++      if (len == 128) {
++         // No-op.
++      } else if (len < 128) {
++         // Copy next len+1 bytes literally.
++         len++;
++         if (len > nleft) return 0; // corrupt data
++         count += len;
++         while (len) {
++            *p = stbi__get8(s);
++            p += 4;
++            len--;
++         }
++      } else if (len > 128) {
++         stbi_uc   val;
++         // Next -len+1 bytes in the dest are replicated from next source byte.
++         // (Interpret len as a negative 8-bit int.)
++         len = 257 - len;
++         if (len > nleft) return 0; // corrupt data
++         val = stbi__get8(s);
++         count += len;
++         while (len) {
++            *p = val;
++            p += 4;
++            len--;
++         }
++      }
++   }
++
++   return 1;
++}
++
++static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
++{
++   int pixelCount;
++   int channelCount, compression;
++   int channel, i;
++   int bitdepth;
++   int w,h;
++   stbi_uc *out;
++   STBI_NOTUSED(ri);
++
++   // Check identifier
++   if (stbi__get32be(s) != 0x38425053)   // "8BPS"
++      return stbi__errpuc("not PSD", "Corrupt PSD image");
++
++   // Check file type version.
++   if (stbi__get16be(s) != 1)
++      return stbi__errpuc("wrong version", "Unsupported version of PSD image");
++
++   // Skip 6 reserved bytes.
++   stbi__skip(s, 6 );
++
++   // Read the number of channels (R, G, B, A, etc).
++   channelCount = stbi__get16be(s);
++   if (channelCount < 0 || channelCount > 16)
++      return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image");
++
++   // Read the rows and columns of the image.
++   h = stbi__get32be(s);
++   w = stbi__get32be(s);
++
++   // Make sure the depth is 8 bits.
++   bitdepth = stbi__get16be(s);
++   if (bitdepth != 8 && bitdepth != 16)
++      return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit");
++
++   // Make sure the color mode is RGB.
++   // Valid options are:
++   //   0: Bitmap
++   //   1: Grayscale
++   //   2: Indexed color
++   //   3: RGB color
++   //   4: CMYK color
++   //   7: Multichannel
++   //   8: Duotone
++   //   9: Lab color
++   if (stbi__get16be(s) != 3)
++      return stbi__errpuc("wrong color format", "PSD is not in RGB color format");
++
++   // Skip the Mode Data.  (It's the palette for indexed color; other info for other modes.)
++   stbi__skip(s,stbi__get32be(s) );
++
++   // Skip the image resources.  (resolution, pen tool paths, etc)
++   stbi__skip(s, stbi__get32be(s) );
++
++   // Skip the reserved data.
++   stbi__skip(s, stbi__get32be(s) );
++
++   // Find out if the data is compressed.
++   // Known values:
++   //   0: no compression
++   //   1: RLE compressed
++   compression = stbi__get16be(s);
++   if (compression > 1)
++      return stbi__errpuc("bad compression", "PSD has an unknown compression format");
++
++   // Check size
++   if (!stbi__mad3sizes_valid(4, w, h, 0))
++      return stbi__errpuc("too large", "Corrupt PSD");
++
++   // Create the destination image.
++
++   if (!compression && bitdepth == 16 && bpc == 16) {
++      out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0);
++      ri->bits_per_channel = 16;
++   } else
++      out = (stbi_uc *) stbi__malloc(4 * w*h);
++
++   if (!out) return stbi__errpuc("outofmem", "Out of memory");
++   pixelCount = w*h;
++
++   // Initialize the data to zero.
++   //memset( out, 0, pixelCount * 4 );
++
++   // Finally, the image data.
++   if (compression) {
++      // RLE as used by .PSD and .TIFF
++      // Loop until you get the number of unpacked bytes you are expecting:
++      //     Read the next source byte into n.
++      //     If n is between 0 and 127 inclusive, copy the next n+1 bytes literally.
++      //     Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times.
++      //     Else if n is 128, noop.
++      // Endloop
++
++      // The RLE-compressed data is preceded by a 2-byte data count for each row in the data,
++      // which we're going to just skip.
++      stbi__skip(s, h * channelCount * 2 );
++
++      // Read the RLE data by channel.
++      for (channel = 0; channel < 4; channel++) {
++         stbi_uc *p;
++
++         p = out+channel;
++         if (channel >= channelCount) {
++            // Fill this channel with default data.
++            for (i = 0; i < pixelCount; i++, p += 4)
++               *p = (channel == 3 ? 255 : 0);
++         } else {
++            // Read the RLE data.
++            if (!stbi__psd_decode_rle(s, p, pixelCount)) {
++               STBI_FREE(out);
++               return stbi__errpuc("corrupt", "bad RLE data");
++            }
++         }
++      }
++
++   } else {
++      // We're at the raw image data.  It's each channel in order (Red, Green, Blue, Alpha, ...)
++      // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image.
++
++      // Read the data by channel.
++      for (channel = 0; channel < 4; channel++) {
++         if (channel >= channelCount) {
++            // Fill this channel with default data.
++            if (bitdepth == 16 && bpc == 16) {
++               stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
++               stbi__uint16 val = channel == 3 ? 65535 : 0;
++               for (i = 0; i < pixelCount; i++, q += 4)
++                  *q = val;
++            } else {
++               stbi_uc *p = out+channel;
++               stbi_uc val = channel == 3 ? 255 : 0;
++               for (i = 0; i < pixelCount; i++, p += 4)
++                  *p = val;
++            }
++         } else {
++            if (ri->bits_per_channel == 16) {    // output bpc
++               stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
++               for (i = 0; i < pixelCount; i++, q += 4)
++                  *q = (stbi__uint16) stbi__get16be(s);
++            } else {
++               stbi_uc *p = out+channel;
++               if (bitdepth == 16) {  // input bpc
++                  for (i = 0; i < pixelCount; i++, p += 4)
++                     *p = (stbi_uc) (stbi__get16be(s) >> 8);
++               } else {
++                  for (i = 0; i < pixelCount; i++, p += 4)
++                     *p = stbi__get8(s);
++               }
++            }
++         }
++      }
++   }
++
++   // remove weird white matte from PSD
++   if (channelCount >= 4) {
++      if (ri->bits_per_channel == 16) {
++         for (i=0; i < w*h; ++i) {
++            stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i;
++            if (pixel[3] != 0 && pixel[3] != 65535) {
++               float a = pixel[3] / 65535.0f;
++               float ra = 1.0f / a;
++               float inv_a = 65535.0f * (1 - ra);
++               pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a);
++               pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a);
++               pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a);
++            }
++         }
++      } else {
++         for (i=0; i < w*h; ++i) {
++            unsigned char *pixel = out + 4*i;
++            if (pixel[3] != 0 && pixel[3] != 255) {
++               float a = pixel[3] / 255.0f;
++               float ra = 1.0f / a;
++               float inv_a = 255.0f * (1 - ra);
++               pixel[0] = (unsigned char) (pixel[0]*ra + inv_a);
++               pixel[1] = (unsigned char) (pixel[1]*ra + inv_a);
++               pixel[2] = (unsigned char) (pixel[2]*ra + inv_a);
++            }
++         }
++      }
++   }
++
++   // convert to desired output format
++   if (req_comp && req_comp != 4) {
++      if (ri->bits_per_channel == 16)
++         out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h);
++      else
++         out = stbi__convert_format(out, 4, req_comp, w, h);
++      if (out == NULL) return out; // stbi__convert_format frees input on failure
++   }
++
++   if (comp) *comp = 4;
++   *y = h;
++   *x = w;
++
++   return out;
++}
++#endif
++
++// *************************************************************************************************
++// Softimage PIC loader
++// by Tom Seddon
++//
++// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
++// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
++
++#ifndef STBI_NO_PIC
++static int stbi__pic_is4(stbi__context *s,const char *str)
++{
++   int i;
++   for (i=0; i<4; ++i)
++      if (stbi__get8(s) != (stbi_uc)str[i])
++         return 0;
++
++   return 1;
++}
++
++static int stbi__pic_test_core(stbi__context *s)
++{
++   int i;
++
++   if (!stbi__pic_is4(s,"\x53\x80\xF6\x34"))
++      return 0;
++
++   for(i=0;i<84;++i)
++      stbi__get8(s);
++
++   if (!stbi__pic_is4(s,"PICT"))
++      return 0;
++
++   return 1;
++}
++
++typedef struct
++{
++   stbi_uc size,type,channel;
++} stbi__pic_packet;
++
++static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest)
++{
++   int mask=0x80, i;
++
++   for (i=0; i<4; ++i, mask>>=1) {
++      if (channel & mask) {
++         if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short");
++         dest[i]=stbi__get8(s);
++      }
++   }
++
++   return dest;
++}
++
++static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src)
++{
++   int mask=0x80,i;
++
++   for (i=0;i<4; ++i, mask>>=1)
++      if (channel&mask)
++         dest[i]=src[i];
++}
++
++static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result)
++{
++   int act_comp=0,num_packets=0,y,chained;
++   stbi__pic_packet packets[10];
++
++   // this will (should...) cater for even some bizarre stuff like having data
++    // for the same channel in multiple packets.
++   do {
++      stbi__pic_packet *packet;
++
++      if (num_packets==sizeof(packets)/sizeof(packets[0]))
++         return stbi__errpuc("bad format","too many packets");
++
++      packet = &packets[num_packets++];
++
++      chained = stbi__get8(s);
++      packet->size    = stbi__get8(s);
++      packet->type    = stbi__get8(s);
++      packet->channel = stbi__get8(s);
++
++      act_comp |= packet->channel;
++
++      if (stbi__at_eof(s))          return stbi__errpuc("bad file","file too short (reading packets)");
++      if (packet->size != 8)  return stbi__errpuc("bad format","packet isn't 8bpp");
++   } while (chained);
++
++   *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
++
++   for(y=0; y<height; ++y) {
++      int packet_idx;
++
++      for(packet_idx=0; packet_idx < num_packets; ++packet_idx) {
++         stbi__pic_packet *packet = &packets[packet_idx];
++         stbi_uc *dest = result+y*width*4;
++
++         switch (packet->type) {
++            default:
++               return stbi__errpuc("bad format","packet has bad compression type");
++
++            case 0: {//uncompressed
++               int x;
++
++               for(x=0;x<width;++x, dest+=4)
++                  if (!stbi__readval(s,packet->channel,dest))
++                     return 0;
++               break;
++            }
++
++            case 1://Pure RLE
++               {
++                  int left=width, i;
++
++                  while (left>0) {
++                     stbi_uc count,value[4];
++
++                     count=stbi__get8(s);
++                     if (stbi__at_eof(s))   return stbi__errpuc("bad file","file too short (pure read count)");
++
++                     if (count > left)
++                        count = (stbi_uc) left;
++
++                     if (!stbi__readval(s,packet->channel,value))  return 0;
++
++                     for(i=0; i<count; ++i,dest+=4)
++                        stbi__copyval(packet->channel,dest,value);
++                     left -= count;
++                  }
++               }
++               break;
++
++            case 2: {//Mixed RLE
++               int left=width;
++               while (left>0) {
++                  int count = stbi__get8(s), i;
++                  if (stbi__at_eof(s))  return stbi__errpuc("bad file","file too short (mixed read count)");
++
++                  if (count >= 128) { // Repeated
++                     stbi_uc value[4];
++
++                     if (count==128)
++                        count = stbi__get16be(s);
++                     else
++                        count -= 127;
++                     if (count > left)
++                        return stbi__errpuc("bad file","scanline overrun");
++
++                     if (!stbi__readval(s,packet->channel,value))
++                        return 0;
++
++                     for(i=0;i<count;++i, dest += 4)
++                        stbi__copyval(packet->channel,dest,value);
++                  } else { // Raw
++                     ++count;
++                     if (count>left) return stbi__errpuc("bad file","scanline overrun");
++
++                     for(i=0;i<count;++i, dest+=4)
++                        if (!stbi__readval(s,packet->channel,dest))
++                           return 0;
++                  }
++                  left-=count;
++               }
++               break;
++            }
++         }
++      }
++   }
++
++   return result;
++}
++
++static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri)
++{
++   stbi_uc *result;
++   int i, x,y, internal_comp;
++   STBI_NOTUSED(ri);
++
++   if (!comp) comp = &internal_comp;
++
++   for (i=0; i<92; ++i)
++      stbi__get8(s);
++
++   x = stbi__get16be(s);
++   y = stbi__get16be(s);
++   if (stbi__at_eof(s))  return stbi__errpuc("bad file","file too short (pic header)");
++   if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode");
++
++   stbi__get32be(s); //skip `ratio'
++   stbi__get16be(s); //skip `fields'
++   stbi__get16be(s); //skip `pad'
++
++   // intermediate buffer is RGBA
++   result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0);
++   memset(result, 0xff, x*y*4);
++
++   if (!stbi__pic_load_core(s,x,y,comp, result)) {
++      STBI_FREE(result);
++      result=0;
++   }
++   *px = x;
++   *py = y;
++   if (req_comp == 0) req_comp = *comp;
++   result=stbi__convert_format(result,4,req_comp,x,y);
++
++   return result;
++}
++
++static int stbi__pic_test(stbi__context *s)
++{
++   int r = stbi__pic_test_core(s);
++   stbi__rewind(s);
++   return r;
++}
++#endif
++
++// *************************************************************************************************
++// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
++
++#ifndef STBI_NO_GIF
++typedef struct
++{
++   stbi__int16 prefix;
++   stbi_uc first;
++   stbi_uc suffix;
++} stbi__gif_lzw;
++
++typedef struct
++{
++   int w,h;
++   stbi_uc *out;                 // output buffer (always 4 components)
++   stbi_uc *background;          // The current "background" as far as a gif is concerned
++   stbi_uc *history; 
++   int flags, bgindex, ratio, transparent, eflags;
++   stbi_uc  pal[256][4];
++   stbi_uc lpal[256][4];
++   stbi__gif_lzw codes[8192];
++   stbi_uc *color_table;
++   int parse, step;
++   int lflags;
++   int start_x, start_y;
++   int max_x, max_y;
++   int cur_x, cur_y;
++   int line_size;
++   int delay;
++} stbi__gif;
++
++static int stbi__gif_test_raw(stbi__context *s)
++{
++   int sz;
++   if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0;
++   sz = stbi__get8(s);
++   if (sz != '9' && sz != '7') return 0;
++   if (stbi__get8(s) != 'a') return 0;
++   return 1;
++}
++
++static int stbi__gif_test(stbi__context *s)
++{
++   int r = stbi__gif_test_raw(s);
++   stbi__rewind(s);
++   return r;
++}
++
++static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp)
++{
++   int i;
++   for (i=0; i < num_entries; ++i) {
++      pal[i][2] = stbi__get8(s);
++      pal[i][1] = stbi__get8(s);
++      pal[i][0] = stbi__get8(s);
++      pal[i][3] = transp == i ? 0 : 255;
++   }
++}
++
++static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info)
++{
++   stbi_uc version;
++   if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
++      return stbi__err("not GIF", "Corrupt GIF");
++
++   version = stbi__get8(s);
++   if (version != '7' && version != '9')    return stbi__err("not GIF", "Corrupt GIF");
++   if (stbi__get8(s) != 'a')                return stbi__err("not GIF", "Corrupt GIF");
++
++   stbi__g_failure_reason = "";
++   g->w = stbi__get16le(s);
++   g->h = stbi__get16le(s);
++   g->flags = stbi__get8(s);
++   g->bgindex = stbi__get8(s);
++   g->ratio = stbi__get8(s);
++   g->transparent = -1;
++
++   if (comp != 0) *comp = 4;  // can't actually tell whether it's 3 or 4 until we parse the comments
++
++   if (is_info) return 1;
++
++   if (g->flags & 0x80)
++      stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1);
++
++   return 1;
++}
++
++static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp)
++{
++   stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif));
++   if (!stbi__gif_header(s, g, comp, 1)) {
++      STBI_FREE(g);
++      stbi__rewind( s );
++      return 0;
++   }
++   if (x) *x = g->w;
++   if (y) *y = g->h;
++   STBI_FREE(g);
++   return 1;
++}
++
++static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code)
++{
++   stbi_uc *p, *c;
++   int idx; 
++
++   // recurse to decode the prefixes, since the linked-list is backwards,
++   // and working backwards through an interleaved image would be nasty
++   if (g->codes[code].prefix >= 0)
++      stbi__out_gif_code(g, g->codes[code].prefix);
++
++   if (g->cur_y >= g->max_y) return;
++
++   idx = g->cur_x + g->cur_y; 
++   p = &g->out[idx];
++   g->history[idx / 4] = 1;  
++
++   c = &g->color_table[g->codes[code].suffix * 4];
++   if (c[3] > 128) { // don't render transparent pixels; 
++      p[0] = c[2];
++      p[1] = c[1];
++      p[2] = c[0];
++      p[3] = c[3];
++   }
++   g->cur_x += 4;
++
++   if (g->cur_x >= g->max_x) {
++      g->cur_x = g->start_x;
++      g->cur_y += g->step;
++
++      while (g->cur_y >= g->max_y && g->parse > 0) {
++         g->step = (1 << g->parse) * g->line_size;
++         g->cur_y = g->start_y + (g->step >> 1);
++         --g->parse;
++      }
++   }
++}
++
++static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g)
++{
++   stbi_uc lzw_cs;
++   stbi__int32 len, init_code;
++   stbi__uint32 first;
++   stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
++   stbi__gif_lzw *p;
++
++   lzw_cs = stbi__get8(s);
++   if (lzw_cs > 12) return NULL;
++   clear = 1 << lzw_cs;
++   first = 1;
++   codesize = lzw_cs + 1;
++   codemask = (1 << codesize) - 1;
++   bits = 0;
++   valid_bits = 0;
++   for (init_code = 0; init_code < clear; init_code++) {
++      g->codes[init_code].prefix = -1;
++      g->codes[init_code].first = (stbi_uc) init_code;
++      g->codes[init_code].suffix = (stbi_uc) init_code;
++   }
++
++   // support no starting clear code
++   avail = clear+2;
++   oldcode = -1;
++
++   len = 0;
++   for(;;) {
++      if (valid_bits < codesize) {
++         if (len == 0) {
++            len = stbi__get8(s); // start new block
++            if (len == 0)
++               return g->out;
++         }
++         --len;
++         bits |= (stbi__int32) stbi__get8(s) << valid_bits;
++         valid_bits += 8;
++      } else {
++         stbi__int32 code = bits & codemask;
++         bits >>= codesize;
++         valid_bits -= codesize;
++         // @OPTIMIZE: is there some way we can accelerate the non-clear path?
++         if (code == clear) {  // clear code
++            codesize = lzw_cs + 1;
++            codemask = (1 << codesize) - 1;
++            avail = clear + 2;
++            oldcode = -1;
++            first = 0;
++         } else if (code == clear + 1) { // end of stream code
++            stbi__skip(s, len);
++            while ((len = stbi__get8(s)) > 0)
++               stbi__skip(s,len);
++            return g->out;
++         } else if (code <= avail) {
++            if (first) {
++               return stbi__errpuc("no clear code", "Corrupt GIF");
++            }
++
++            if (oldcode >= 0) {
++               p = &g->codes[avail++];
++               if (avail > 8192) {
++                  return stbi__errpuc("too many codes", "Corrupt GIF");
++               }
++
++               p->prefix = (stbi__int16) oldcode;
++               p->first = g->codes[oldcode].first;
++               p->suffix = (code == avail) ? p->first : g->codes[code].first;
++            } else if (code == avail)
++               return stbi__errpuc("illegal code in raster", "Corrupt GIF");
++
++            stbi__out_gif_code(g, (stbi__uint16) code);
++
++            if ((avail & codemask) == 0 && avail <= 0x0FFF) {
++               codesize++;
++               codemask = (1 << codesize) - 1;
++            }
++
++            oldcode = code;
++         } else {
++            return stbi__errpuc("illegal code in raster", "Corrupt GIF");
++         }
++      }
++   }
++}
++
++// this function is designed to support animated gifs, although stb_image doesn't support it
++// two back is the image from two frames ago, used for a very specific disposal format
++static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back)
++{
++   int dispose; 
++   int first_frame; 
++   int pi; 
++   int pcount; 
++   STBI_NOTUSED(req_comp);
++
++   // on first frame, any non-written pixels get the background colour (non-transparent)
++   first_frame = 0; 
++   if (g->out == 0) {
++      if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header
++      if (!stbi__mad3sizes_valid(4, g->w, g->h, 0))
++         return stbi__errpuc("too large", "GIF image is too large");
++      pcount = g->w * g->h;
++      g->out = (stbi_uc *) stbi__malloc(4 * pcount);
++      g->background = (stbi_uc *) stbi__malloc(4 * pcount);
++      g->history = (stbi_uc *) stbi__malloc(pcount);
++      if (!g->out || !g->background || !g->history)
++         return stbi__errpuc("outofmem", "Out of memory");
++
++      // image is treated as "transparent" at the start - ie, nothing overwrites the current background; 
++      // background colour is only used for pixels that are not rendered first frame, after that "background"
++      // color refers to the color that was there the previous frame. 
++      memset(g->out, 0x00, 4 * pcount);
++      memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent)
++      memset(g->history, 0x00, pcount);        // pixels that were affected previous frame
++      first_frame = 1; 
++   } else {
++      // second frame - how do we dispoase of the previous one?
++      dispose = (g->eflags & 0x1C) >> 2; 
++      pcount = g->w * g->h; 
++
++      if ((dispose == 3) && (two_back == 0)) {
++         dispose = 2; // if I don't have an image to revert back to, default to the old background
++      }
++
++      if (dispose == 3) { // use previous graphic
++         for (pi = 0; pi < pcount; ++pi) {
++            if (g->history[pi]) {
++               memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 ); 
++            }
++         }
++      } else if (dispose == 2) { 
++         // restore what was changed last frame to background before that frame; 
++         for (pi = 0; pi < pcount; ++pi) {
++            if (g->history[pi]) {
++               memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 ); 
++            }
++         }
++      } else {
++         // This is a non-disposal case eithe way, so just 
++         // leave the pixels as is, and they will become the new background
++         // 1: do not dispose
++         // 0:  not specified.
++      }
++
++      // background is what out is after the undoing of the previou frame; 
++      memcpy( g->background, g->out, 4 * g->w * g->h ); 
++   }
++
++   // clear my history; 
++   memset( g->history, 0x00, g->w * g->h );        // pixels that were affected previous frame
++
++   for (;;) {
++      int tag = stbi__get8(s); 
++      switch (tag) {
++         case 0x2C: /* Image Descriptor */
++         {
++            stbi__int32 x, y, w, h;
++            stbi_uc *o;
++
++            x = stbi__get16le(s);
++            y = stbi__get16le(s);
++            w = stbi__get16le(s);
++            h = stbi__get16le(s);
++            if (((x + w) > (g->w)) || ((y + h) > (g->h)))
++               return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
++
++            g->line_size = g->w * 4;
++            g->start_x = x * 4;
++            g->start_y = y * g->line_size;
++            g->max_x   = g->start_x + w * 4;
++            g->max_y   = g->start_y + h * g->line_size;
++            g->cur_x   = g->start_x;
++            g->cur_y   = g->start_y;
++
++            // if the width of the specified rectangle is 0, that means
++            // we may not see *any* pixels or the image is malformed;
++            // to make sure this is caught, move the current y down to
++            // max_y (which is what out_gif_code checks).
++            if (w == 0)
++               g->cur_y = g->max_y;
++
++            g->lflags = stbi__get8(s);
++
++            if (g->lflags & 0x40) {
++               g->step = 8 * g->line_size; // first interlaced spacing
++               g->parse = 3;
++            } else {
++               g->step = g->line_size;
++               g->parse = 0;
++            }
++
++            if (g->lflags & 0x80) {
++               stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1);
++               g->color_table = (stbi_uc *) g->lpal;
++            } else if (g->flags & 0x80) {
++               g->color_table = (stbi_uc *) g->pal;
++            } else
++               return stbi__errpuc("missing color table", "Corrupt GIF");            
++            
++            o = stbi__process_gif_raster(s, g);
++            if (!o) return NULL;
++
++            // if this was the first frame, 
++            pcount = g->w * g->h; 
++            if (first_frame && (g->bgindex > 0)) {
++               // if first frame, any pixel not drawn to gets the background color
++               for (pi = 0; pi < pcount; ++pi) {
++                  if (g->history[pi] == 0) {
++                     g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; 
++                     memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 ); 
++                  }
++               }
++            }
++
++            return o;
++         }
++
++         case 0x21: // Comment Extension.
++         {
++            int len;
++            int ext = stbi__get8(s); 
++            if (ext == 0xF9) { // Graphic Control Extension.
++               len = stbi__get8(s);
++               if (len == 4) {
++                  g->eflags = stbi__get8(s);
++                  g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths.
++
++                  // unset old transparent
++                  if (g->transparent >= 0) {
++                     g->pal[g->transparent][3] = 255; 
++                  } 
++                  if (g->eflags & 0x01) {
++                     g->transparent = stbi__get8(s);
++                     if (g->transparent >= 0) {
++                        g->pal[g->transparent][3] = 0; 
++                     }
++                  } else {
++                     // don't need transparent
++                     stbi__skip(s, 1); 
++                     g->transparent = -1; 
++                  }
++               } else {
++                  stbi__skip(s, len);
++                  break;
++               }
++            } 
++            while ((len = stbi__get8(s)) != 0) {
++               stbi__skip(s, len);
++            }
++            break;
++         }
++
++         case 0x3B: // gif stream termination code
++            return (stbi_uc *) s; // using '1' causes warning on some compilers
++
++         default:
++            return stbi__errpuc("unknown code", "Corrupt GIF");
++      }
++   }
++}
++
++static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
++{
++   if (stbi__gif_test(s)) {
++      int layers = 0; 
++      stbi_uc *u = 0;
++      stbi_uc *out = 0;
++      stbi_uc *two_back = 0; 
++      stbi__gif g;
++      int stride; 
++      memset(&g, 0, sizeof(g));
++      if (delays) {
++         *delays = 0; 
++      }
++
++      do {
++         u = stbi__gif_load_next(s, &g, comp, req_comp, two_back);
++         if (u == (stbi_uc *) s) u = 0;  // end of animated gif marker
++
++         if (u) {
++            *x = g.w;
++            *y = g.h;
++            ++layers; 
++            stride = g.w * g.h * 4; 
++         
++            if (out) {
++               out = (stbi_uc*) STBI_REALLOC( out, layers * stride ); 
++               if (delays) {
++                  *delays = (int*) STBI_REALLOC( *delays, sizeof(int) * layers ); 
++               }
++            } else {
++               out = (stbi_uc*)stbi__malloc( layers * stride ); 
++               if (delays) {
++                  *delays = (int*) stbi__malloc( layers * sizeof(int) ); 
++               }
++            }
++            memcpy( out + ((layers - 1) * stride), u, stride ); 
++            if (layers >= 2) {
++               two_back = out - 2 * stride; 
++            }
++
++            if (delays) {
++               (*delays)[layers - 1U] = g.delay; 
++            }
++         }
++      } while (u != 0); 
++
++      // free temp buffer; 
++      STBI_FREE(g.out); 
++      STBI_FREE(g.history); 
++      STBI_FREE(g.background); 
++
++      // do the final conversion after loading everything; 
++      if (req_comp && req_comp != 4)
++         out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h);
++
++      *z = layers; 
++      return out;
++   } else {
++      return stbi__errpuc("not GIF", "Image was not as a gif type."); 
++   }
++}
++
++static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++   stbi_uc *u = 0;
++   stbi__gif g;
++   memset(&g, 0, sizeof(g));
++   STBI_NOTUSED(ri);
++
++   u = stbi__gif_load_next(s, &g, comp, req_comp, 0);
++   if (u == (stbi_uc *) s) u = 0;  // end of animated gif marker
++   if (u) {
++      *x = g.w;
++      *y = g.h;
++
++      // moved conversion to after successful load so that the same
++      // can be done for multiple frames. 
++      if (req_comp && req_comp != 4)
++         u = stbi__convert_format(u, 4, req_comp, g.w, g.h);
++   } else if (g.out) {
++      // if there was an error and we allocated an image buffer, free it!
++      STBI_FREE(g.out);
++   }
++
++   // free buffers needed for multiple frame loading; 
++   STBI_FREE(g.history);
++   STBI_FREE(g.background); 
++
++   return u;
++}
++
++static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp)
++{
++   return stbi__gif_info_raw(s,x,y,comp);
++}
++#endif
++
++// *************************************************************************************************
++// Radiance RGBE HDR loader
++// originally by Nicolas Schulz
++#ifndef STBI_NO_HDR
++static int stbi__hdr_test_core(stbi__context *s, const char *signature)
++{
++   int i;
++   for (i=0; signature[i]; ++i)
++      if (stbi__get8(s) != signature[i])
++          return 0;
++   stbi__rewind(s);
++   return 1;
++}
++
++static int stbi__hdr_test(stbi__context* s)
++{
++   int r = stbi__hdr_test_core(s, "#?RADIANCE\n");
++   stbi__rewind(s);
++   if(!r) {
++       r = stbi__hdr_test_core(s, "#?RGBE\n");
++       stbi__rewind(s);
++   }
++   return r;
++}
++
++#define STBI__HDR_BUFLEN  1024
++static char *stbi__hdr_gettoken(stbi__context *z, char *buffer)
++{
++   int len=0;
++   char c = '\0';
++
++   c = (char) stbi__get8(z);
++
++   while (!stbi__at_eof(z) && c != '\n') {
++      buffer[len++] = c;
++      if (len == STBI__HDR_BUFLEN-1) {
++         // flush to end of line
++         while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
++            ;
++         break;
++      }
++      c = (char) stbi__get8(z);
++   }
++
++   buffer[len] = 0;
++   return buffer;
++}
++
++static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp)
++{
++   if ( input[3] != 0 ) {
++      float f1;
++      // Exponent
++      f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8));
++      if (req_comp <= 2)
++         output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
++      else {
++         output[0] = input[0] * f1;
++         output[1] = input[1] * f1;
++         output[2] = input[2] * f1;
++      }
++      if (req_comp == 2) output[1] = 1;
++      if (req_comp == 4) output[3] = 1;
++   } else {
++      switch (req_comp) {
++         case 4: output[3] = 1; /* fallthrough */
++         case 3: output[0] = output[1] = output[2] = 0;
++                 break;
++         case 2: output[1] = 1; /* fallthrough */
++         case 1: output[0] = 0;
++                 break;
++      }
++   }
++}
++
++static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++   char buffer[STBI__HDR_BUFLEN];
++   char *token;
++   int valid = 0;
++   int width, height;
++   stbi_uc *scanline;
++   float *hdr_data;
++   int len;
++   unsigned char count, value;
++   int i, j, k, c1,c2, z;
++   const char *headerToken;
++   STBI_NOTUSED(ri);
++
++   // Check identifier
++   headerToken = stbi__hdr_gettoken(s,buffer);
++   if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0)
++      return stbi__errpf("not HDR", "Corrupt HDR image");
++
++   // Parse header
++   for(;;) {
++      token = stbi__hdr_gettoken(s,buffer);
++      if (token[0] == 0) break;
++      if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
++   }
++
++   if (!valid)    return stbi__errpf("unsupported format", "Unsupported HDR format");
++
++   // Parse width and height
++   // can't use sscanf() if we're not using stdio!
++   token = stbi__hdr_gettoken(s,buffer);
++   if (strncmp(token, "-Y ", 3))  return stbi__errpf("unsupported data layout", "Unsupported HDR format");
++   token += 3;
++   height = (int) strtol(token, &token, 10);
++   while (*token == ' ') ++token;
++   if (strncmp(token, "+X ", 3))  return stbi__errpf("unsupported data layout", "Unsupported HDR format");
++   token += 3;
++   width = (int) strtol(token, NULL, 10);
++
++   *x = width;
++   *y = height;
++
++   if (comp) *comp = 3;
++   if (req_comp == 0) req_comp = 3;
++
++   if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0))
++      return stbi__errpf("too large", "HDR image is too large");
++
++   // Read data
++   hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
++   if (!hdr_data)
++      return stbi__errpf("outofmem", "Out of memory");
++
++   // Load image data
++   // image data is stored as some number of sca
++   if ( width < 8 || width >= 32768) {
++      // Read flat data
++      for (j=0; j < height; ++j) {
++         for (i=0; i < width; ++i) {
++            stbi_uc rgbe[4];
++           main_decode_loop:
++            stbi__getn(s, rgbe, 4);
++            stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
++         }
++      }
++   } else {
++      // Read RLE-encoded data
++      scanline = NULL;
++
++      for (j = 0; j < height; ++j) {
++         c1 = stbi__get8(s);
++         c2 = stbi__get8(s);
++         len = stbi__get8(s);
++         if (c1 != 2 || c2 != 2 || (len & 0x80)) {
++            // not run-length encoded, so we have to actually use THIS data as a decoded
++            // pixel (note this can't be a valid pixel--one of RGB must be >= 128)
++            stbi_uc rgbe[4];
++            rgbe[0] = (stbi_uc) c1;
++            rgbe[1] = (stbi_uc) c2;
++            rgbe[2] = (stbi_uc) len;
++            rgbe[3] = (stbi_uc) stbi__get8(s);
++            stbi__hdr_convert(hdr_data, rgbe, req_comp);
++            i = 1;
++            j = 0;
++            STBI_FREE(scanline);
++            goto main_decode_loop; // yes, this makes no sense
++         }
++         len <<= 8;
++         len |= stbi__get8(s);
++         if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); }
++         if (scanline == NULL) {
++            scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0);
++            if (!scanline) {
++               STBI_FREE(hdr_data);
++               return stbi__errpf("outofmem", "Out of memory");
++            }
++         }
++
++         for (k = 0; k < 4; ++k) {
++            int nleft;
++            i = 0;
++            while ((nleft = width - i) > 0) {
++               count = stbi__get8(s);
++               if (count > 128) {
++                  // Run
++                  value = stbi__get8(s);
++                  count -= 128;
++                  if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
++                  for (z = 0; z < count; ++z)
++                     scanline[i++ * 4 + k] = value;
++               } else {
++                  // Dump
++                  if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
++                  for (z = 0; z < count; ++z)
++                     scanline[i++ * 4 + k] = stbi__get8(s);
++               }
++            }
++         }
++         for (i=0; i < width; ++i)
++            stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp);
++      }
++      if (scanline)
++         STBI_FREE(scanline);
++   }
++
++   return hdr_data;
++}
++
++static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp)
++{
++   char buffer[STBI__HDR_BUFLEN];
++   char *token;
++   int valid = 0;
++   int dummy;
++
++   if (!x) x = &dummy;
++   if (!y) y = &dummy;
++   if (!comp) comp = &dummy;
++
++   if (stbi__hdr_test(s) == 0) {
++       stbi__rewind( s );
++       return 0;
++   }
++
++   for(;;) {
++      token = stbi__hdr_gettoken(s,buffer);
++      if (token[0] == 0) break;
++      if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
++   }
++
++   if (!valid) {
++       stbi__rewind( s );
++       return 0;
++   }
++   token = stbi__hdr_gettoken(s,buffer);
++   if (strncmp(token, "-Y ", 3)) {
++       stbi__rewind( s );
++       return 0;
++   }
++   token += 3;
++   *y = (int) strtol(token, &token, 10);
++   while (*token == ' ') ++token;
++   if (strncmp(token, "+X ", 3)) {
++       stbi__rewind( s );
++       return 0;
++   }
++   token += 3;
++   *x = (int) strtol(token, NULL, 10);
++   *comp = 3;
++   return 1;
++}
++#endif // STBI_NO_HDR
++
++#ifndef STBI_NO_BMP
++static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp)
++{
++   void *p;
++   stbi__bmp_data info;
++
++   info.all_a = 255;
++   p = stbi__bmp_parse_header(s, &info);
++   stbi__rewind( s );
++   if (p == NULL)
++      return 0;
++   if (x) *x = s->img_x;
++   if (y) *y = s->img_y;
++   if (comp) *comp = info.ma ? 4 : 3;
++   return 1;
++}
++#endif
++
++#ifndef STBI_NO_PSD
++static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp)
++{
++   int channelCount, dummy, depth;
++   if (!x) x = &dummy;
++   if (!y) y = &dummy;
++   if (!comp) comp = &dummy;
++   if (stbi__get32be(s) != 0x38425053) {
++       stbi__rewind( s );
++       return 0;
++   }
++   if (stbi__get16be(s) != 1) {
++       stbi__rewind( s );
++       return 0;
++   }
++   stbi__skip(s, 6);
++   channelCount = stbi__get16be(s);
++   if (channelCount < 0 || channelCount > 16) {
++       stbi__rewind( s );
++       return 0;
++   }
++   *y = stbi__get32be(s);
++   *x = stbi__get32be(s);
++   depth = stbi__get16be(s);
++   if (depth != 8 && depth != 16) {
++       stbi__rewind( s );
++       return 0;
++   }
++   if (stbi__get16be(s) != 3) {
++       stbi__rewind( s );
++       return 0;
++   }
++   *comp = 4;
++   return 1;
++}
++
++static int stbi__psd_is16(stbi__context *s)
++{
++   int channelCount, depth;
++   if (stbi__get32be(s) != 0x38425053) {
++       stbi__rewind( s );
++       return 0;
++   }
++   if (stbi__get16be(s) != 1) {
++       stbi__rewind( s );
++       return 0;
++   }
++   stbi__skip(s, 6);
++   channelCount = stbi__get16be(s);
++   if (channelCount < 0 || channelCount > 16) {
++       stbi__rewind( s );
++       return 0;
++   }
++   (void) stbi__get32be(s);
++   (void) stbi__get32be(s);
++   depth = stbi__get16be(s);
++   if (depth != 16) {
++       stbi__rewind( s );
++       return 0;
++   }
++   return 1;
++}
++#endif
++
++#ifndef STBI_NO_PIC
++static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp)
++{
++   int act_comp=0,num_packets=0,chained,dummy;
++   stbi__pic_packet packets[10];
++
++   if (!x) x = &dummy;
++   if (!y) y = &dummy;
++   if (!comp) comp = &dummy;
++
++   if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) {
++      stbi__rewind(s);
++      return 0;
++   }
++
++   stbi__skip(s, 88);
++
++   *x = stbi__get16be(s);
++   *y = stbi__get16be(s);
++   if (stbi__at_eof(s)) {
++      stbi__rewind( s);
++      return 0;
++   }
++   if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) {
++      stbi__rewind( s );
++      return 0;
++   }
++
++   stbi__skip(s, 8);
++
++   do {
++      stbi__pic_packet *packet;
++
++      if (num_packets==sizeof(packets)/sizeof(packets[0]))
++         return 0;
++
++      packet = &packets[num_packets++];
++      chained = stbi__get8(s);
++      packet->size    = stbi__get8(s);
++      packet->type    = stbi__get8(s);
++      packet->channel = stbi__get8(s);
++      act_comp |= packet->channel;
++
++      if (stbi__at_eof(s)) {
++          stbi__rewind( s );
++          return 0;
++      }
++      if (packet->size != 8) {
++          stbi__rewind( s );
++          return 0;
++      }
++   } while (chained);
++
++   *comp = (act_comp & 0x10 ? 4 : 3);
++
++   return 1;
++}
++#endif
++
++// *************************************************************************************************
++// Portable Gray Map and Portable Pixel Map loader
++// by Ken Miller
++//
++// PGM: http://netpbm.sourceforge.net/doc/pgm.html
++// PPM: http://netpbm.sourceforge.net/doc/ppm.html
++//
++// Known limitations:
++//    Does not support comments in the header section
++//    Does not support ASCII image data (formats P2 and P3)
++//    Does not support 16-bit-per-channel
++
++#ifndef STBI_NO_PNM
++
++static int      stbi__pnm_test(stbi__context *s)
++{
++   char p, t;
++   p = (char) stbi__get8(s);
++   t = (char) stbi__get8(s);
++   if (p != 'P' || (t != '5' && t != '6')) {
++       stbi__rewind( s );
++       return 0;
++   }
++   return 1;
++}
++
++static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++   stbi_uc *out;
++   STBI_NOTUSED(ri);
++
++   if (!stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n))
++      return 0;
++
++   *x = s->img_x;
++   *y = s->img_y;
++   if (comp) *comp = s->img_n;
++
++   if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0))
++      return stbi__errpuc("too large", "PNM too large");
++
++   out = (stbi_uc *) stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0);
++   if (!out) return stbi__errpuc("outofmem", "Out of memory");
++   stbi__getn(s, out, s->img_n * s->img_x * s->img_y);
++
++   if (req_comp && req_comp != s->img_n) {
++      out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
++      if (out == NULL) return out; // stbi__convert_format frees input on failure
++   }
++   return out;
++}
++
++static int      stbi__pnm_isspace(char c)
++{
++   return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r';
++}
++
++static void     stbi__pnm_skip_whitespace(stbi__context *s, char *c)
++{
++   for (;;) {
++      while (!stbi__at_eof(s) && stbi__pnm_isspace(*c))
++         *c = (char) stbi__get8(s);
++
++      if (stbi__at_eof(s) || *c != '#')
++         break;
++
++      while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' )
++         *c = (char) stbi__get8(s);
++   }
++}
++
++static int      stbi__pnm_isdigit(char c)
++{
++   return c >= '0' && c <= '9';
++}
++
++static int      stbi__pnm_getinteger(stbi__context *s, char *c)
++{
++   int value = 0;
++
++   while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) {
++      value = value*10 + (*c - '0');
++      *c = (char) stbi__get8(s);
++   }
++
++   return value;
++}
++
++static int      stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp)
++{
++   int maxv, dummy;
++   char c, p, t;
++
++   if (!x) x = &dummy;
++   if (!y) y = &dummy;
++   if (!comp) comp = &dummy;
++
++   stbi__rewind(s);
++
++   // Get identifier
++   p = (char) stbi__get8(s);
++   t = (char) stbi__get8(s);
++   if (p != 'P' || (t != '5' && t != '6')) {
++       stbi__rewind(s);
++       return 0;
++   }
++
++   *comp = (t == '6') ? 3 : 1;  // '5' is 1-component .pgm; '6' is 3-component .ppm
++
++   c = (char) stbi__get8(s);
++   stbi__pnm_skip_whitespace(s, &c);
++
++   *x = stbi__pnm_getinteger(s, &c); // read width
++   stbi__pnm_skip_whitespace(s, &c);
++
++   *y = stbi__pnm_getinteger(s, &c); // read height
++   stbi__pnm_skip_whitespace(s, &c);
++
++   maxv = stbi__pnm_getinteger(s, &c);  // read max value
++
++   if (maxv > 255)
++      return stbi__err("max value > 255", "PPM image not 8-bit");
++   else
++      return 1;
++}
++#endif
++
++static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp)
++{
++   #ifndef STBI_NO_JPEG
++   if (stbi__jpeg_info(s, x, y, comp)) return 1;
++   #endif
++
++   #ifndef STBI_NO_PNG
++   if (stbi__png_info(s, x, y, comp))  return 1;
++   #endif
++
++   #ifndef STBI_NO_GIF
++   if (stbi__gif_info(s, x, y, comp))  return 1;
++   #endif
++
++   #ifndef STBI_NO_BMP
++   if (stbi__bmp_info(s, x, y, comp))  return 1;
++   #endif
++
++   #ifndef STBI_NO_PSD
++   if (stbi__psd_info(s, x, y, comp))  return 1;
++   #endif
++
++   #ifndef STBI_NO_PIC
++   if (stbi__pic_info(s, x, y, comp))  return 1;
++   #endif
++
++   #ifndef STBI_NO_PNM
++   if (stbi__pnm_info(s, x, y, comp))  return 1;
++   #endif
++
++   #ifndef STBI_NO_HDR
++   if (stbi__hdr_info(s, x, y, comp))  return 1;
++   #endif
++
++   // test tga last because it's a crappy test!
++   #ifndef STBI_NO_TGA
++   if (stbi__tga_info(s, x, y, comp))
++       return 1;
++   #endif
++   return stbi__err("unknown image type", "Image not of any known type, or corrupt");
++}
++
++static int stbi__is_16_main(stbi__context *s)
++{
++   #ifndef STBI_NO_PNG
++   if (stbi__png_is16(s))  return 1;
++   #endif
++
++   #ifndef STBI_NO_PSD
++   if (stbi__psd_is16(s))  return 1;
++   #endif
++
++   return 0;
++}
++
++#ifndef STBI_NO_STDIO
++STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
++{
++    FILE *f = stbi__fopen(filename, "rb");
++    int result;
++    if (!f) return stbi__err("can't fopen", "Unable to open file");
++    result = stbi_info_from_file(f, x, y, comp);
++    fclose(f);
++    return result;
++}
++
++STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp)
++{
++   int r;
++   stbi__context s;
++   long pos = ftell(f);
++   stbi__start_file(&s, f);
++   r = stbi__info_main(&s,x,y,comp);
++   fseek(f,pos,SEEK_SET);
++   return r;
++}
++
++STBIDEF int stbi_is_16_bit(char const *filename)
++{
++    FILE *f = stbi__fopen(filename, "rb");
++    int result;
++    if (!f) return stbi__err("can't fopen", "Unable to open file");
++    result = stbi_is_16_bit_from_file(f);
++    fclose(f);
++    return result;
++}
++
++STBIDEF int stbi_is_16_bit_from_file(FILE *f)
++{
++   int r;
++   stbi__context s;
++   long pos = ftell(f);
++   stbi__start_file(&s, f);
++   r = stbi__is_16_main(&s);
++   fseek(f,pos,SEEK_SET);
++   return r;
++}
++#endif // !STBI_NO_STDIO
++
++STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
++{
++   stbi__context s;
++   stbi__start_mem(&s,buffer,len);
++   return stbi__info_main(&s,x,y,comp);
++}
++
++STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
++{
++   stbi__context s;
++   stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
++   return stbi__info_main(&s,x,y,comp);
++}
++
++STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
++{
++   stbi__context s;
++   stbi__start_mem(&s,buffer,len);
++   return stbi__is_16_main(&s);
++}
++
++STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
++{
++   stbi__context s;
++   stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
++   return stbi__is_16_main(&s);
++}
++
++#endif // STB_IMAGE_IMPLEMENTATION
++
++/*
++   revision history:
++      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs 
++      2.19  (2018-02-11) fix warning
++      2.18  (2018-01-30) fix warnings
++      2.17  (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug
++                         1-bit BMP
++                         *_is_16_bit api
++                         avoid warnings
++      2.16  (2017-07-23) all functions have 16-bit variants;
++                         STBI_NO_STDIO works again;
++                         compilation fixes;
++                         fix rounding in unpremultiply;
++                         optimize vertical flip;
++                         disable raw_len validation;
++                         documentation fixes
++      2.15  (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode;
++                         warning fixes; disable run-time SSE detection on gcc;
++                         uniform handling of optional "return" values;
++                         thread-safe initialization of zlib tables
++      2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
++      2.13  (2016-11-29) add 16-bit API, only supported for PNG right now
++      2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
++      2.11  (2016-04-02) allocate large structures on the stack
++                         remove white matting for transparent PSD
++                         fix reported channel count for PNG & BMP
++                         re-enable SSE2 in non-gcc 64-bit
++                         support RGB-formatted JPEG
++                         read 16-bit PNGs (only as 8-bit)
++      2.10  (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED
++      2.09  (2016-01-16) allow comments in PNM files
++                         16-bit-per-pixel TGA (not bit-per-component)
++                         info() for TGA could break due to .hdr handling
++                         info() for BMP to shares code instead of sloppy parse
++                         can use STBI_REALLOC_SIZED if allocator doesn't support realloc
++                         code cleanup
++      2.08  (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA
++      2.07  (2015-09-13) fix compiler warnings
++                         partial animated GIF support
++                         limited 16-bpc PSD support
++                         #ifdef unused functions
++                         bug with < 92 byte PIC,PNM,HDR,TGA
++      2.06  (2015-04-19) fix bug where PSD returns wrong '*comp' value
++      2.05  (2015-04-19) fix bug in progressive JPEG handling, fix warning
++      2.04  (2015-04-15) try to re-enable SIMD on MinGW 64-bit
++      2.03  (2015-04-12) extra corruption checking (mmozeiko)
++                         stbi_set_flip_vertically_on_load (nguillemot)
++                         fix NEON support; fix mingw support
++      2.02  (2015-01-19) fix incorrect assert, fix warning
++      2.01  (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2
++      2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG
++      2.00  (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg)
++                         progressive JPEG (stb)
++                         PGM/PPM support (Ken Miller)
++                         STBI_MALLOC,STBI_REALLOC,STBI_FREE
++                         GIF bugfix -- seemingly never worked
++                         STBI_NO_*, STBI_ONLY_*
++      1.48  (2014-12-14) fix incorrectly-named assert()
++      1.47  (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb)
++                         optimize PNG (ryg)
++                         fix bug in interlaced PNG with user-specified channel count (stb)
++      1.46  (2014-08-26)
++              fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG
++      1.45  (2014-08-16)
++              fix MSVC-ARM internal compiler error by wrapping malloc
++      1.44  (2014-08-07)
++              various warning fixes from Ronny Chevalier
++      1.43  (2014-07-15)
++              fix MSVC-only compiler problem in code changed in 1.42
++      1.42  (2014-07-09)
++              don't define _CRT_SECURE_NO_WARNINGS (affects user code)
++              fixes to stbi__cleanup_jpeg path
++              added STBI_ASSERT to avoid requiring assert.h
++      1.41  (2014-06-25)
++              fix search&replace from 1.36 that messed up comments/error messages
++      1.40  (2014-06-22)
++              fix gcc struct-initialization warning
++      1.39  (2014-06-15)
++              fix to TGA optimization when req_comp != number of components in TGA;
++              fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite)
++              add support for BMP version 5 (more ignored fields)
++      1.38  (2014-06-06)
++              suppress MSVC warnings on integer casts truncating values
++              fix accidental rename of 'skip' field of I/O
++      1.37  (2014-06-04)
++              remove duplicate typedef
++      1.36  (2014-06-03)
++              convert to header file single-file library
++              if de-iphone isn't set, load iphone images color-swapped instead of returning NULL
++      1.35  (2014-05-27)
++              various warnings
++              fix broken STBI_SIMD path
++              fix bug where stbi_load_from_file no longer left file pointer in correct place
++              fix broken non-easy path for 32-bit BMP (possibly never used)
++              TGA optimization by Arseny Kapoulkine
++      1.34  (unknown)
++              use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case
++      1.33  (2011-07-14)
++              make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements
++      1.32  (2011-07-13)
++              support for "info" function for all supported filetypes (SpartanJ)
++      1.31  (2011-06-20)
++              a few more leak fixes, bug in PNG handling (SpartanJ)
++      1.30  (2011-06-11)
++              added ability to load files via callbacks to accomidate custom input streams (Ben Wenger)
++              removed deprecated format-specific test/load functions
++              removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway
++              error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha)
++              fix inefficiency in decoding 32-bit BMP (David Woo)
++      1.29  (2010-08-16)
++              various warning fixes from Aurelien Pocheville
++      1.28  (2010-08-01)
++              fix bug in GIF palette transparency (SpartanJ)
++      1.27  (2010-08-01)
++              cast-to-stbi_uc to fix warnings
++      1.26  (2010-07-24)
++              fix bug in file buffering for PNG reported by SpartanJ
++      1.25  (2010-07-17)
++              refix trans_data warning (Won Chun)
++      1.24  (2010-07-12)
++              perf improvements reading from files on platforms with lock-heavy fgetc()
++              minor perf improvements for jpeg
++              deprecated type-specific functions so we'll get feedback if they're needed
++              attempt to fix trans_data warning (Won Chun)
++      1.23    fixed bug in iPhone support
++      1.22  (2010-07-10)
++              removed image *writing* support
++              stbi_info support from Jetro Lauha
++              GIF support from Jean-Marc Lienher
++              iPhone PNG-extensions from James Brown
++              warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva)
++      1.21    fix use of 'stbi_uc' in header (reported by jon blow)
++      1.20    added support for Softimage PIC, by Tom Seddon
++      1.19    bug in interlaced PNG corruption check (found by ryg)
++      1.18  (2008-08-02)
++              fix a threading bug (local mutable static)
++      1.17    support interlaced PNG
++      1.16    major bugfix - stbi__convert_format converted one too many pixels
++      1.15    initialize some fields for thread safety
++      1.14    fix threadsafe conversion bug
++              header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
++      1.13    threadsafe
++      1.12    const qualifiers in the API
++      1.11    Support installable IDCT, colorspace conversion routines
++      1.10    Fixes for 64-bit (don't use "unsigned long")
++              optimized upsampling by Fabian "ryg" Giesen
++      1.09    Fix format-conversion for PSD code (bad global variables!)
++      1.08    Thatcher Ulrich's PSD code integrated by Nicolas Schulz
++      1.07    attempt to fix C++ warning/errors again
++      1.06    attempt to fix C++ warning/errors again
++      1.05    fix TGA loading to return correct *comp and use good luminance calc
++      1.04    default float alpha is 1, not 255; use 'void *' for stbi_image_free
++      1.03    bugfixes to STBI_NO_STDIO, STBI_NO_HDR
++      1.02    support for (subset of) HDR files, float interface for preferred access to them
++      1.01    fix bug: possible bug in handling right-side up bmps... not sure
++              fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all
++      1.00    interface to zlib that skips zlib header
++      0.99    correct handling of alpha in palette
++      0.98    TGA loader by lonesock; dynamically add loaders (untested)
++      0.97    jpeg errors on too large a file; also catch another malloc failure
++      0.96    fix detection of invalid v value - particleman@mollyrocket forum
++      0.95    during header scan, seek to markers in case of padding
++      0.94    STBI_NO_STDIO to disable stdio usage; rename all #defines the same
++      0.93    handle jpegtran output; verbose errors
++      0.92    read 4,8,16,24,32-bit BMP files of several formats
++      0.91    output 24-bit Windows 3.0 BMP files
++      0.90    fix a few more warnings; bump version number to approach 1.0
++      0.61    bugfixes due to Marc LeBlanc, Christopher Lloyd
++      0.60    fix compiling as c++
++      0.59    fix warnings: merge Dave Moore's -Wall fixes
++      0.58    fix bug: zlib uncompressed mode len/nlen was wrong endian
++      0.57    fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available
++      0.56    fix bug: zlib uncompressed mode len vs. nlen
++      0.55    fix bug: restart_interval not initialized to 0
++      0.54    allow NULL for 'int *comp'
++      0.53    fix bug in png 3->4; speedup png decoding
++      0.52    png handles req_comp=3,4 directly; minor cleanup; jpeg comments
++      0.51    obey req_comp requests, 1-component jpegs return as 1-component,
++              on 'test' only check type, not whether we support this variant
++      0.50  (2006-11-19)
++              first released version
++*/
++
++
++/*
++------------------------------------------------------------------------------
++This software is available under 2 licenses -- choose whichever you prefer.
++------------------------------------------------------------------------------
++ALTERNATIVE A - MIT License
++Copyright (c) 2017 Sean Barrett
++Permission is hereby granted, free of charge, to any person obtaining a copy of
++this software and associated documentation files (the "Software"), to deal in
++the Software without restriction, including without limitation the rights to
++use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
++of the Software, and to permit persons to whom the Software is furnished to do
++so, subject to the following conditions:
++The above copyright notice and this permission notice shall be included in all
++copies or substantial portions of the Software.
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
++OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
++SOFTWARE.
++------------------------------------------------------------------------------
++ALTERNATIVE B - Public Domain (www.unlicense.org)
++This is free and unencumbered software released into the public domain.
++Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
++software, either in source code form or as a compiled binary, for any purpose,
++commercial or non-commercial, and by any means.
++In jurisdictions that recognize copyright laws, the author or authors of this
++software dedicate any and all copyright interest in the software to the public
++domain. We make this dedication for the benefit of the public at large and to
++the detriment of our heirs and successors. We intend this dedication to be an
++overt act of relinquishment in perpetuity of all present and future rights to
++this software under copyright law.
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
++ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
++WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
++------------------------------------------------------------------------------
++*/
+diff --git a/src/drempels/stb_image_resize.h b/src/drempels/stb_image_resize.h
+new file mode 100644
+index 0000000..4f6ad35
+--- /dev/null
++++ b/src/drempels/stb_image_resize.h
+@@ -0,0 +1,2630 @@
++/* stb_image_resize - v0.96 - public domain image resizing
++   by Jorge L Rodriguez (@VinoBS) - 2014
++   http://github.com/nothings/stb
++
++   Written with emphasis on usability, portability, and efficiency. (No
++   SIMD or threads, so it be easily outperformed by libs that use those.)
++   Only scaling and translation is supported, no rotations or shears.
++   Easy API downsamples w/Mitchell filter, upsamples w/cubic interpolation.
++
++   COMPILING & LINKING
++      In one C/C++ file that #includes this file, do this:
++         #define STB_IMAGE_RESIZE_IMPLEMENTATION
++      before the #include. That will create the implementation in that file.
++
++   QUICKSTART
++      stbir_resize_uint8(      input_pixels , in_w , in_h , 0,
++                               output_pixels, out_w, out_h, 0, num_channels)
++      stbir_resize_float(...)
++      stbir_resize_uint8_srgb( input_pixels , in_w , in_h , 0,
++                               output_pixels, out_w, out_h, 0,
++                               num_channels , alpha_chan  , 0)
++      stbir_resize_uint8_srgb_edgemode(
++                               input_pixels , in_w , in_h , 0, 
++                               output_pixels, out_w, out_h, 0, 
++                               num_channels , alpha_chan  , 0, STBIR_EDGE_CLAMP)
++                                                            // WRAP/REFLECT/ZERO
++
++   FULL API
++      See the "header file" section of the source for API documentation.
++
++   ADDITIONAL DOCUMENTATION
++
++      SRGB & FLOATING POINT REPRESENTATION
++         The sRGB functions presume IEEE floating point. If you do not have
++         IEEE floating point, define STBIR_NON_IEEE_FLOAT. This will use
++         a slower implementation.
++
++      MEMORY ALLOCATION
++         The resize functions here perform a single memory allocation using
++         malloc. To control the memory allocation, before the #include that
++         triggers the implementation, do:
++
++            #define STBIR_MALLOC(size,context) ...
++            #define STBIR_FREE(ptr,context)   ...
++
++         Each resize function makes exactly one call to malloc/free, so to use
++         temp memory, store the temp memory in the context and return that.
++
++      ASSERT
++         Define STBIR_ASSERT(boolval) to override assert() and not use assert.h
++
++      OPTIMIZATION
++         Define STBIR_SATURATE_INT to compute clamp values in-range using
++         integer operations instead of float operations. This may be faster
++         on some platforms.
++
++      DEFAULT FILTERS
++         For functions which don't provide explicit control over what filters
++         to use, you can change the compile-time defaults with
++
++            #define STBIR_DEFAULT_FILTER_UPSAMPLE     STBIR_FILTER_something
++            #define STBIR_DEFAULT_FILTER_DOWNSAMPLE   STBIR_FILTER_something
++
++         See stbir_filter in the header-file section for the list of filters.
++
++      NEW FILTERS
++         A number of 1D filter kernels are used. For a list of
++         supported filters see the stbir_filter enum. To add a new filter,
++         write a filter function and add it to stbir__filter_info_table.
++
++      PROGRESS
++         For interactive use with slow resize operations, you can install
++         a progress-report callback:
++
++            #define STBIR_PROGRESS_REPORT(val)   some_func(val)
++
++         The parameter val is a float which goes from 0 to 1 as progress is made.
++
++         For example:
++
++            static void my_progress_report(float progress);
++            #define STBIR_PROGRESS_REPORT(val) my_progress_report(val)
++
++            #define STB_IMAGE_RESIZE_IMPLEMENTATION
++            #include "stb_image_resize.h"
++
++            static void my_progress_report(float progress)
++            {
++               printf("Progress: %f%%\n", progress*100);
++            }
++
++      MAX CHANNELS
++         If your image has more than 64 channels, define STBIR_MAX_CHANNELS
++         to the max you'll have.
++
++      ALPHA CHANNEL
++         Most of the resizing functions provide the ability to control how
++         the alpha channel of an image is processed. The important things
++         to know about this:
++
++         1. The best mathematically-behaved version of alpha to use is
++         called "premultiplied alpha", in which the other color channels
++         have had the alpha value multiplied in. If you use premultiplied
++         alpha, linear filtering (such as image resampling done by this
++         library, or performed in texture units on GPUs) does the "right
++         thing". While premultiplied alpha is standard in the movie CGI
++         industry, it is still uncommon in the videogame/real-time world.
++
++         If you linearly filter non-premultiplied alpha, strange effects
++         occur. (For example, the 50/50 average of 99% transparent bright green
++         and 1% transparent black produces 50% transparent dark green when
++         non-premultiplied, whereas premultiplied it produces 50%
++         transparent near-black. The former introduces green energy
++         that doesn't exist in the source image.)
++
++         2. Artists should not edit premultiplied-alpha images; artists
++         want non-premultiplied alpha images. Thus, art tools generally output
++         non-premultiplied alpha images.
++
++         3. You will get best results in most cases by converting images
++         to premultiplied alpha before processing them mathematically.
++
++         4. If you pass the flag STBIR_FLAG_ALPHA_PREMULTIPLIED, the
++         resizer does not do anything special for the alpha channel;
++         it is resampled identically to other channels. This produces
++         the correct results for premultiplied-alpha images, but produces
++         less-than-ideal results for non-premultiplied-alpha images.
++
++         5. If you do not pass the flag STBIR_FLAG_ALPHA_PREMULTIPLIED,
++         then the resizer weights the contribution of input pixels
++         based on their alpha values, or, equivalently, it multiplies
++         the alpha value into the color channels, resamples, then divides
++         by the resultant alpha value. Input pixels which have alpha=0 do
++         not contribute at all to output pixels unless _all_ of the input
++         pixels affecting that output pixel have alpha=0, in which case
++         the result for that pixel is the same as it would be without
++         STBIR_FLAG_ALPHA_PREMULTIPLIED. However, this is only true for
++         input images in integer formats. For input images in float format,
++         input pixels with alpha=0 have no effect, and output pixels
++         which have alpha=0 will be 0 in all channels. (For float images,
++         you can manually achieve the same result by adding a tiny epsilon
++         value to the alpha channel of every image, and then subtracting
++         or clamping it at the end.)
++
++         6. You can suppress the behavior described in #5 and make
++         all-0-alpha pixels have 0 in all channels by #defining
++         STBIR_NO_ALPHA_EPSILON.
++
++         7. You can separately control whether the alpha channel is
++         interpreted as linear or affected by the colorspace. By default
++         it is linear; you almost never want to apply the colorspace.
++         (For example, graphics hardware does not apply sRGB conversion
++         to the alpha channel.)
++
++   CONTRIBUTORS
++      Jorge L Rodriguez: Implementation
++      Sean Barrett: API design, optimizations
++      Aras Pranckevicius: bugfix
++      Nathan Reed: warning fixes
++
++   REVISIONS
++      0.96 (2019-03-04) fixed warnings
++      0.95 (2017-07-23) fixed warnings
++      0.94 (2017-03-18) fixed warnings
++      0.93 (2017-03-03) fixed bug with certain combinations of heights
++      0.92 (2017-01-02) fix integer overflow on large (>2GB) images
++      0.91 (2016-04-02) fix warnings; fix handling of subpixel regions
++      0.90 (2014-09-17) first released version
++
++   LICENSE
++     See end of file for license information.
++
++   TODO
++      Don't decode all of the image data when only processing a partial tile
++      Don't use full-width decode buffers when only processing a partial tile
++      When processing wide images, break processing into tiles so data fits in L1 cache
++      Installable filters?
++      Resize that respects alpha test coverage
++         (Reference code: FloatImage::alphaTestCoverage and FloatImage::scaleAlphaToCoverage:
++         https://code.google.com/p/nvidia-texture-tools/source/browse/trunk/src/nvimage/FloatImage.cpp )
++*/
++
++#ifndef STBIR_INCLUDE_STB_IMAGE_RESIZE_H
++#define STBIR_INCLUDE_STB_IMAGE_RESIZE_H
++
++#ifdef _MSC_VER
++typedef unsigned char  stbir_uint8;
++typedef unsigned short stbir_uint16;
++typedef unsigned int   stbir_uint32;
++#else
++#include <stdint.h>
++typedef uint8_t  stbir_uint8;
++typedef uint16_t stbir_uint16;
++typedef uint32_t stbir_uint32;
++#endif
++
++#ifndef STBIRDEF
++#ifdef STB_IMAGE_RESIZE_STATIC
++#define STBIRDEF static
++#else
++#ifdef __cplusplus
++#define STBIRDEF extern "C"
++#else
++#define STBIRDEF extern
++#endif
++#endif
++#endif
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// Easy-to-use API:
++//
++//     * "input pixels" points to an array of image data with 'num_channels' channels (e.g. RGB=3, RGBA=4)
++//     * input_w is input image width (x-axis), input_h is input image height (y-axis)
++//     * stride is the offset between successive rows of image data in memory, in bytes. you can
++//       specify 0 to mean packed continuously in memory
++//     * alpha channel is treated identically to other channels.
++//     * colorspace is linear or sRGB as specified by function name
++//     * returned result is 1 for success or 0 in case of an error.
++//       #define STBIR_ASSERT() to trigger an assert on parameter validation errors.
++//     * Memory required grows approximately linearly with input and output size, but with
++//       discontinuities at input_w == output_w and input_h == output_h.
++//     * These functions use a "default" resampling filter defined at compile time. To change the filter,
++//       you can change the compile-time defaults by #defining STBIR_DEFAULT_FILTER_UPSAMPLE
++//       and STBIR_DEFAULT_FILTER_DOWNSAMPLE, or you can use the medium-complexity API.
++
++STBIRDEF int stbir_resize_uint8(     const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                           unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                     int num_channels);
++
++STBIRDEF int stbir_resize_float(     const float *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                           float *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                     int num_channels);
++
++
++// The following functions interpret image data as gamma-corrected sRGB. 
++// Specify STBIR_ALPHA_CHANNEL_NONE if you have no alpha channel,
++// or otherwise provide the index of the alpha channel. Flags value
++// of 0 will probably do the right thing if you're not sure what
++// the flags mean.
++
++#define STBIR_ALPHA_CHANNEL_NONE       -1
++
++// Set this flag if your texture has premultiplied alpha. Otherwise, stbir will
++// use alpha-weighted resampling (effectively premultiplying, resampling,
++// then unpremultiplying).
++#define STBIR_FLAG_ALPHA_PREMULTIPLIED    (1 << 0)
++// The specified alpha channel should be handled as gamma-corrected value even
++// when doing sRGB operations.
++#define STBIR_FLAG_ALPHA_USES_COLORSPACE  (1 << 1)
++
++STBIRDEF int stbir_resize_uint8_srgb(const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                           unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                     int num_channels, int alpha_channel, int flags);
++
++
++typedef enum
++{
++    STBIR_EDGE_CLAMP   = 1,
++    STBIR_EDGE_REFLECT = 2,
++    STBIR_EDGE_WRAP    = 3,
++    STBIR_EDGE_ZERO    = 4,
++} stbir_edge;
++
++// This function adds the ability to specify how requests to sample off the edge of the image are handled.
++STBIRDEF int stbir_resize_uint8_srgb_edgemode(const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                                    unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                              int num_channels, int alpha_channel, int flags,
++                                              stbir_edge edge_wrap_mode);
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// Medium-complexity API
++//
++// This extends the easy-to-use API as follows:
++//
++//     * Alpha-channel can be processed separately
++//       * If alpha_channel is not STBIR_ALPHA_CHANNEL_NONE
++//         * Alpha channel will not be gamma corrected (unless flags&STBIR_FLAG_GAMMA_CORRECT)
++//         * Filters will be weighted by alpha channel (unless flags&STBIR_FLAG_ALPHA_PREMULTIPLIED)
++//     * Filter can be selected explicitly
++//     * uint16 image type
++//     * sRGB colorspace available for all types
++//     * context parameter for passing to STBIR_MALLOC
++
++typedef enum
++{
++    STBIR_FILTER_DEFAULT      = 0,  // use same filter type that easy-to-use API chooses
++    STBIR_FILTER_BOX          = 1,  // A trapezoid w/1-pixel wide ramps, same result as box for integer scale ratios
++    STBIR_FILTER_TRIANGLE     = 2,  // On upsampling, produces same results as bilinear texture filtering
++    STBIR_FILTER_CUBICBSPLINE = 3,  // The cubic b-spline (aka Mitchell-Netrevalli with B=1,C=0), gaussian-esque
++    STBIR_FILTER_CATMULLROM   = 4,  // An interpolating cubic spline
++    STBIR_FILTER_MITCHELL     = 5,  // Mitchell-Netrevalli filter with B=1/3, C=1/3
++} stbir_filter;
++
++typedef enum
++{
++    STBIR_COLORSPACE_LINEAR,
++    STBIR_COLORSPACE_SRGB,
++
++    STBIR_MAX_COLORSPACES,
++} stbir_colorspace;
++
++// The following functions are all identical except for the type of the image data
++
++STBIRDEF int stbir_resize_uint8_generic( const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                               unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                         int num_channels, int alpha_channel, int flags,
++                                         stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space, 
++                                         void *alloc_context);
++
++STBIRDEF int stbir_resize_uint16_generic(const stbir_uint16 *input_pixels  , int input_w , int input_h , int input_stride_in_bytes,
++                                               stbir_uint16 *output_pixels , int output_w, int output_h, int output_stride_in_bytes,
++                                         int num_channels, int alpha_channel, int flags,
++                                         stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space, 
++                                         void *alloc_context);
++
++STBIRDEF int stbir_resize_float_generic( const float *input_pixels         , int input_w , int input_h , int input_stride_in_bytes,
++                                               float *output_pixels        , int output_w, int output_h, int output_stride_in_bytes,
++                                         int num_channels, int alpha_channel, int flags,
++                                         stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space, 
++                                         void *alloc_context);
++
++
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// Full-complexity API
++//
++// This extends the medium API as follows:
++//
++//       * uint32 image type
++//     * not typesafe
++//     * separate filter types for each axis
++//     * separate edge modes for each axis
++//     * can specify scale explicitly for subpixel correctness
++//     * can specify image source tile using texture coordinates
++
++typedef enum
++{
++    STBIR_TYPE_UINT8 ,
++    STBIR_TYPE_UINT16,
++    STBIR_TYPE_UINT32,
++    STBIR_TYPE_FLOAT ,
++
++    STBIR_MAX_TYPES
++} stbir_datatype;
++
++STBIRDEF int stbir_resize(         const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                         void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                   stbir_datatype datatype,
++                                   int num_channels, int alpha_channel, int flags,
++                                   stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical, 
++                                   stbir_filter filter_horizontal,  stbir_filter filter_vertical,
++                                   stbir_colorspace space, void *alloc_context);
++
++STBIRDEF int stbir_resize_subpixel(const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                         void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                   stbir_datatype datatype,
++                                   int num_channels, int alpha_channel, int flags,
++                                   stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical, 
++                                   stbir_filter filter_horizontal,  stbir_filter filter_vertical,
++                                   stbir_colorspace space, void *alloc_context,
++                                   float x_scale, float y_scale,
++                                   float x_offset, float y_offset);
++
++STBIRDEF int stbir_resize_region(  const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                         void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                   stbir_datatype datatype,
++                                   int num_channels, int alpha_channel, int flags,
++                                   stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical, 
++                                   stbir_filter filter_horizontal,  stbir_filter filter_vertical,
++                                   stbir_colorspace space, void *alloc_context,
++                                   float s0, float t0, float s1, float t1);
++// (s0, t0) & (s1, t1) are the top-left and bottom right corner (uv addressing style: [0, 1]x[0, 1]) of a region of the input image to use.
++
++//
++//
++////   end header file   /////////////////////////////////////////////////////
++#endif // STBIR_INCLUDE_STB_IMAGE_RESIZE_H
++
++
++
++
++
++#ifdef STB_IMAGE_RESIZE_IMPLEMENTATION
++
++#ifndef STBIR_ASSERT
++#include <assert.h>
++#define STBIR_ASSERT(x) assert(x)
++#endif
++
++// For memset
++#include <string.h>
++
++#include <math.h>
++
++#ifndef STBIR_MALLOC
++#include <stdlib.h>
++// use comma operator to evaluate c, to avoid "unused parameter" warnings
++#define STBIR_MALLOC(size,c) ((void)(c), malloc(size))
++#define STBIR_FREE(ptr,c)    ((void)(c), free(ptr))
++#endif
++
++#ifndef _MSC_VER
++#ifdef __cplusplus
++#define stbir__inline inline
++#else
++#define stbir__inline
++#endif
++#else
++#define stbir__inline __forceinline
++#endif
++
++
++// should produce compiler error if size is wrong
++typedef unsigned char stbir__validate_uint32[sizeof(stbir_uint32) == 4 ? 1 : -1];
++
++#ifdef _MSC_VER
++#define STBIR__NOTUSED(v)  (void)(v)
++#else
++#define STBIR__NOTUSED(v)  (void)sizeof(v)
++#endif
++
++#define STBIR__ARRAY_SIZE(a) (sizeof((a))/sizeof((a)[0]))
++
++#ifndef STBIR_DEFAULT_FILTER_UPSAMPLE
++#define STBIR_DEFAULT_FILTER_UPSAMPLE    STBIR_FILTER_CATMULLROM
++#endif
++
++#ifndef STBIR_DEFAULT_FILTER_DOWNSAMPLE
++#define STBIR_DEFAULT_FILTER_DOWNSAMPLE  STBIR_FILTER_MITCHELL
++#endif
++
++#ifndef STBIR_PROGRESS_REPORT
++#define STBIR_PROGRESS_REPORT(float_0_to_1)
++#endif
++
++#ifndef STBIR_MAX_CHANNELS
++#define STBIR_MAX_CHANNELS 64
++#endif
++
++#if STBIR_MAX_CHANNELS > 65536
++#error "Too many channels; STBIR_MAX_CHANNELS must be no more than 65536."
++// because we store the indices in 16-bit variables
++#endif
++
++// This value is added to alpha just before premultiplication to avoid
++// zeroing out color values. It is equivalent to 2^-80. If you don't want
++// that behavior (it may interfere if you have floating point images with
++// very small alpha values) then you can define STBIR_NO_ALPHA_EPSILON to
++// disable it.
++#ifndef STBIR_ALPHA_EPSILON
++#define STBIR_ALPHA_EPSILON ((float)1 / (1 << 20) / (1 << 20) / (1 << 20) / (1 << 20))
++#endif
++
++
++
++#ifdef _MSC_VER
++#define STBIR__UNUSED_PARAM(v)  (void)(v)
++#else
++#define STBIR__UNUSED_PARAM(v)  (void)sizeof(v)
++#endif
++
++// must match stbir_datatype
++static unsigned char stbir__type_size[] = {
++    1, // STBIR_TYPE_UINT8
++    2, // STBIR_TYPE_UINT16
++    4, // STBIR_TYPE_UINT32
++    4, // STBIR_TYPE_FLOAT
++};
++
++// Kernel function centered at 0
++typedef float (stbir__kernel_fn)(float x, float scale);
++typedef float (stbir__support_fn)(float scale);
++
++typedef struct
++{
++    stbir__kernel_fn* kernel;
++    stbir__support_fn* support;
++} stbir__filter_info;
++
++// When upsampling, the contributors are which source pixels contribute.
++// When downsampling, the contributors are which destination pixels are contributed to.
++typedef struct
++{
++    int n0; // First contributing pixel
++    int n1; // Last contributing pixel
++} stbir__contributors;
++
++typedef struct
++{
++    const void* input_data;
++    int input_w;
++    int input_h;
++    int input_stride_bytes;
++
++    void* output_data;
++    int output_w;
++    int output_h;
++    int output_stride_bytes;
++
++    float s0, t0, s1, t1;
++
++    float horizontal_shift; // Units: output pixels
++    float vertical_shift;   // Units: output pixels
++    float horizontal_scale;
++    float vertical_scale;
++
++    int channels;
++    int alpha_channel;
++    stbir_uint32 flags;
++    stbir_datatype type;
++    stbir_filter horizontal_filter;
++    stbir_filter vertical_filter;
++    stbir_edge edge_horizontal;
++    stbir_edge edge_vertical;
++    stbir_colorspace colorspace;
++
++    stbir__contributors* horizontal_contributors;
++    float* horizontal_coefficients;
++
++    stbir__contributors* vertical_contributors;
++    float* vertical_coefficients;
++
++    int decode_buffer_pixels;
++    float* decode_buffer;
++
++    float* horizontal_buffer;
++
++    // cache these because ceil/floor are inexplicably showing up in profile
++    int horizontal_coefficient_width;
++    int vertical_coefficient_width;
++    int horizontal_filter_pixel_width;
++    int vertical_filter_pixel_width;
++    int horizontal_filter_pixel_margin;
++    int vertical_filter_pixel_margin;
++    int horizontal_num_contributors;
++    int vertical_num_contributors;
++
++    int ring_buffer_length_bytes;   // The length of an individual entry in the ring buffer. The total number of ring buffers is stbir__get_filter_pixel_width(filter)
++    int ring_buffer_num_entries;    // Total number of entries in the ring buffer.
++    int ring_buffer_first_scanline;
++    int ring_buffer_last_scanline;
++    int ring_buffer_begin_index;    // first_scanline is at this index in the ring buffer
++    float* ring_buffer;
++
++    float* encode_buffer; // A temporary buffer to store floats so we don't lose precision while we do multiply-adds.
++
++    int horizontal_contributors_size;
++    int horizontal_coefficients_size;
++    int vertical_contributors_size;
++    int vertical_coefficients_size;
++    int decode_buffer_size;
++    int horizontal_buffer_size;
++    int ring_buffer_size;
++    int encode_buffer_size;
++} stbir__info;
++
++
++static const float stbir__max_uint8_as_float  = 255.0f;
++static const float stbir__max_uint16_as_float = 65535.0f;
++static const double stbir__max_uint32_as_float = 4294967295.0;
++
++
++static stbir__inline int stbir__min(int a, int b)
++{
++    return a < b ? a : b;
++}
++
++static stbir__inline float stbir__saturate(float x)
++{
++    if (x < 0)
++        return 0;
++
++    if (x > 1)
++        return 1;
++
++    return x;
++}
++
++#ifdef STBIR_SATURATE_INT
++static stbir__inline stbir_uint8 stbir__saturate8(int x)
++{
++    if ((unsigned int) x <= 255)
++        return x;
++
++    if (x < 0)
++        return 0;
++
++    return 255;
++}
++
++static stbir__inline stbir_uint16 stbir__saturate16(int x)
++{
++    if ((unsigned int) x <= 65535)
++        return x;
++
++    if (x < 0)
++        return 0;
++
++    return 65535;
++}
++#endif
++
++static float stbir__srgb_uchar_to_linear_float[256] = {
++    0.000000f, 0.000304f, 0.000607f, 0.000911f, 0.001214f, 0.001518f, 0.001821f, 0.002125f, 0.002428f, 0.002732f, 0.003035f,
++    0.003347f, 0.003677f, 0.004025f, 0.004391f, 0.004777f, 0.005182f, 0.005605f, 0.006049f, 0.006512f, 0.006995f, 0.007499f,
++    0.008023f, 0.008568f, 0.009134f, 0.009721f, 0.010330f, 0.010960f, 0.011612f, 0.012286f, 0.012983f, 0.013702f, 0.014444f,
++    0.015209f, 0.015996f, 0.016807f, 0.017642f, 0.018500f, 0.019382f, 0.020289f, 0.021219f, 0.022174f, 0.023153f, 0.024158f,
++    0.025187f, 0.026241f, 0.027321f, 0.028426f, 0.029557f, 0.030713f, 0.031896f, 0.033105f, 0.034340f, 0.035601f, 0.036889f,
++    0.038204f, 0.039546f, 0.040915f, 0.042311f, 0.043735f, 0.045186f, 0.046665f, 0.048172f, 0.049707f, 0.051269f, 0.052861f,
++    0.054480f, 0.056128f, 0.057805f, 0.059511f, 0.061246f, 0.063010f, 0.064803f, 0.066626f, 0.068478f, 0.070360f, 0.072272f,
++    0.074214f, 0.076185f, 0.078187f, 0.080220f, 0.082283f, 0.084376f, 0.086500f, 0.088656f, 0.090842f, 0.093059f, 0.095307f,
++    0.097587f, 0.099899f, 0.102242f, 0.104616f, 0.107023f, 0.109462f, 0.111932f, 0.114435f, 0.116971f, 0.119538f, 0.122139f,
++    0.124772f, 0.127438f, 0.130136f, 0.132868f, 0.135633f, 0.138432f, 0.141263f, 0.144128f, 0.147027f, 0.149960f, 0.152926f,
++    0.155926f, 0.158961f, 0.162029f, 0.165132f, 0.168269f, 0.171441f, 0.174647f, 0.177888f, 0.181164f, 0.184475f, 0.187821f,
++    0.191202f, 0.194618f, 0.198069f, 0.201556f, 0.205079f, 0.208637f, 0.212231f, 0.215861f, 0.219526f, 0.223228f, 0.226966f,
++    0.230740f, 0.234551f, 0.238398f, 0.242281f, 0.246201f, 0.250158f, 0.254152f, 0.258183f, 0.262251f, 0.266356f, 0.270498f,
++    0.274677f, 0.278894f, 0.283149f, 0.287441f, 0.291771f, 0.296138f, 0.300544f, 0.304987f, 0.309469f, 0.313989f, 0.318547f,
++    0.323143f, 0.327778f, 0.332452f, 0.337164f, 0.341914f, 0.346704f, 0.351533f, 0.356400f, 0.361307f, 0.366253f, 0.371238f,
++    0.376262f, 0.381326f, 0.386430f, 0.391573f, 0.396755f, 0.401978f, 0.407240f, 0.412543f, 0.417885f, 0.423268f, 0.428691f,
++    0.434154f, 0.439657f, 0.445201f, 0.450786f, 0.456411f, 0.462077f, 0.467784f, 0.473532f, 0.479320f, 0.485150f, 0.491021f,
++    0.496933f, 0.502887f, 0.508881f, 0.514918f, 0.520996f, 0.527115f, 0.533276f, 0.539480f, 0.545725f, 0.552011f, 0.558340f,
++    0.564712f, 0.571125f, 0.577581f, 0.584078f, 0.590619f, 0.597202f, 0.603827f, 0.610496f, 0.617207f, 0.623960f, 0.630757f,
++    0.637597f, 0.644480f, 0.651406f, 0.658375f, 0.665387f, 0.672443f, 0.679543f, 0.686685f, 0.693872f, 0.701102f, 0.708376f,
++    0.715694f, 0.723055f, 0.730461f, 0.737911f, 0.745404f, 0.752942f, 0.760525f, 0.768151f, 0.775822f, 0.783538f, 0.791298f,
++    0.799103f, 0.806952f, 0.814847f, 0.822786f, 0.830770f, 0.838799f, 0.846873f, 0.854993f, 0.863157f, 0.871367f, 0.879622f,
++    0.887923f, 0.896269f, 0.904661f, 0.913099f, 0.921582f, 0.930111f, 0.938686f, 0.947307f, 0.955974f, 0.964686f, 0.973445f,
++    0.982251f, 0.991102f, 1.0f
++};
++
++static float stbir__srgb_to_linear(float f)
++{
++    if (f <= 0.04045f)
++        return f / 12.92f;
++    else
++        return (float)pow((f + 0.055f) / 1.055f, 2.4f);
++}
++
++static float stbir__linear_to_srgb(float f)
++{
++    if (f <= 0.0031308f)
++        return f * 12.92f;
++    else
++        return 1.055f * (float)pow(f, 1 / 2.4f) - 0.055f;
++}
++
++#ifndef STBIR_NON_IEEE_FLOAT
++// From https://gist.github.com/rygorous/2203834
++
++typedef union
++{
++    stbir_uint32 u;
++    float f;
++} stbir__FP32;
++
++static const stbir_uint32 fp32_to_srgb8_tab4[104] = {
++    0x0073000d, 0x007a000d, 0x0080000d, 0x0087000d, 0x008d000d, 0x0094000d, 0x009a000d, 0x00a1000d,
++    0x00a7001a, 0x00b4001a, 0x00c1001a, 0x00ce001a, 0x00da001a, 0x00e7001a, 0x00f4001a, 0x0101001a,
++    0x010e0033, 0x01280033, 0x01410033, 0x015b0033, 0x01750033, 0x018f0033, 0x01a80033, 0x01c20033,
++    0x01dc0067, 0x020f0067, 0x02430067, 0x02760067, 0x02aa0067, 0x02dd0067, 0x03110067, 0x03440067,
++    0x037800ce, 0x03df00ce, 0x044600ce, 0x04ad00ce, 0x051400ce, 0x057b00c5, 0x05dd00bc, 0x063b00b5,
++    0x06970158, 0x07420142, 0x07e30130, 0x087b0120, 0x090b0112, 0x09940106, 0x0a1700fc, 0x0a9500f2,
++    0x0b0f01cb, 0x0bf401ae, 0x0ccb0195, 0x0d950180, 0x0e56016e, 0x0f0d015e, 0x0fbc0150, 0x10630143,
++    0x11070264, 0x1238023e, 0x1357021d, 0x14660201, 0x156601e9, 0x165a01d3, 0x174401c0, 0x182401af,
++    0x18fe0331, 0x1a9602fe, 0x1c1502d2, 0x1d7e02ad, 0x1ed4028d, 0x201a0270, 0x21520256, 0x227d0240,
++    0x239f0443, 0x25c003fe, 0x27bf03c4, 0x29a10392, 0x2b6a0367, 0x2d1d0341, 0x2ebe031f, 0x304d0300,
++    0x31d105b0, 0x34a80555, 0x37520507, 0x39d504c5, 0x3c37048b, 0x3e7c0458, 0x40a8042a, 0x42bd0401,
++    0x44c20798, 0x488e071e, 0x4c1c06b6, 0x4f76065d, 0x52a50610, 0x55ac05cc, 0x5892058f, 0x5b590559,
++    0x5e0c0a23, 0x631c0980, 0x67db08f6, 0x6c55087f, 0x70940818, 0x74a007bd, 0x787d076c, 0x7c330723,
++};
++ 
++static stbir_uint8 stbir__linear_to_srgb_uchar(float in)
++{
++    static const stbir__FP32 almostone = { 0x3f7fffff }; // 1-eps
++    static const stbir__FP32 minval = { (127-13) << 23 };
++    stbir_uint32 tab,bias,scale,t;
++    stbir__FP32 f;
++ 
++    // Clamp to [2^(-13), 1-eps]; these two values map to 0 and 1, respectively.
++    // The tests are carefully written so that NaNs map to 0, same as in the reference
++    // implementation.
++    if (!(in > minval.f)) // written this way to catch NaNs
++        in = minval.f;
++    if (in > almostone.f)
++        in = almostone.f;
++ 
++    // Do the table lookup and unpack bias, scale
++    f.f = in;
++    tab = fp32_to_srgb8_tab4[(f.u - minval.u) >> 20];
++    bias = (tab >> 16) << 9;
++    scale = tab & 0xffff;
++ 
++    // Grab next-highest mantissa bits and perform linear interpolation
++    t = (f.u >> 12) & 0xff;
++    return (unsigned char) ((bias + scale*t) >> 16);
++}
++
++#else
++// sRGB transition values, scaled by 1<<28
++static int stbir__srgb_offset_to_linear_scaled[256] =
++{
++            0,     40738,    122216,    203693,    285170,    366648,    448125,    529603,
++       611080,    692557,    774035,    855852,    942009,   1033024,   1128971,   1229926,
++      1335959,   1447142,   1563542,   1685229,   1812268,   1944725,   2082664,   2226148,
++      2375238,   2529996,   2690481,   2856753,   3028870,   3206888,   3390865,   3580856,
++      3776916,   3979100,   4187460,   4402049,   4622919,   4850123,   5083710,   5323731,
++      5570236,   5823273,   6082892,   6349140,   6622065,   6901714,   7188133,   7481369,
++      7781466,   8088471,   8402427,   8723380,   9051372,   9386448,   9728650,  10078021,
++     10434603,  10798439,  11169569,  11548036,  11933879,  12327139,  12727857,  13136073,
++     13551826,  13975156,  14406100,  14844697,  15290987,  15745007,  16206795,  16676389,
++     17153826,  17639142,  18132374,  18633560,  19142734,  19659934,  20185196,  20718552,
++     21260042,  21809696,  22367554,  22933648,  23508010,  24090680,  24681686,  25281066,
++     25888850,  26505076,  27129772,  27762974,  28404716,  29055026,  29713942,  30381490,
++     31057708,  31742624,  32436272,  33138682,  33849884,  34569912,  35298800,  36036568,
++     36783260,  37538896,  38303512,  39077136,  39859796,  40651528,  41452360,  42262316,
++     43081432,  43909732,  44747252,  45594016,  46450052,  47315392,  48190064,  49074096,
++     49967516,  50870356,  51782636,  52704392,  53635648,  54576432,  55526772,  56486700,
++     57456236,  58435408,  59424248,  60422780,  61431036,  62449032,  63476804,  64514376,
++     65561776,  66619028,  67686160,  68763192,  69850160,  70947088,  72053992,  73170912,
++     74297864,  75434880,  76581976,  77739184,  78906536,  80084040,  81271736,  82469648,
++     83677792,  84896192,  86124888,  87363888,  88613232,  89872928,  91143016,  92423512,
++     93714432,  95015816,  96327688,  97650056,  98982952, 100326408, 101680440, 103045072,
++    104420320, 105806224, 107202800, 108610064, 110028048, 111456776, 112896264, 114346544,
++    115807632, 117279552, 118762328, 120255976, 121760536, 123276016, 124802440, 126339832,
++    127888216, 129447616, 131018048, 132599544, 134192112, 135795792, 137410592, 139036528,
++    140673648, 142321952, 143981456, 145652208, 147334208, 149027488, 150732064, 152447968,
++    154175200, 155913792, 157663776, 159425168, 161197984, 162982240, 164777968, 166585184,
++    168403904, 170234160, 172075968, 173929344, 175794320, 177670896, 179559120, 181458992,
++    183370528, 185293776, 187228736, 189175424, 191133888, 193104112, 195086128, 197079968,
++    199085648, 201103184, 203132592, 205173888, 207227120, 209292272, 211369392, 213458480,
++    215559568, 217672656, 219797792, 221934976, 224084240, 226245600, 228419056, 230604656,
++    232802400, 235012320, 237234432, 239468736, 241715280, 243974080, 246245120, 248528464,
++    250824112, 253132064, 255452368, 257785040, 260130080, 262487520, 264857376, 267239664,
++};
++
++static stbir_uint8 stbir__linear_to_srgb_uchar(float f)
++{
++    int x = (int) (f * (1 << 28)); // has headroom so you don't need to clamp
++    int v = 0;
++    int i;
++
++    // Refine the guess with a short binary search.
++    i = v + 128; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++    i = v +  64; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++    i = v +  32; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++    i = v +  16; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++    i = v +   8; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++    i = v +   4; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++    i = v +   2; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++    i = v +   1; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++
++    return (stbir_uint8) v;
++}
++#endif
++
++static float stbir__filter_trapezoid(float x, float scale)
++{
++    float halfscale = scale / 2;
++    float t = 0.5f + halfscale;
++    STBIR_ASSERT(scale <= 1);
++
++    x = (float)fabs(x);
++
++    if (x >= t)
++        return 0;
++    else
++    {
++        float r = 0.5f - halfscale;
++        if (x <= r)
++            return 1;
++        else
++            return (t - x) / scale;
++    }
++}
++
++static float stbir__support_trapezoid(float scale)
++{
++    STBIR_ASSERT(scale <= 1);
++    return 0.5f + scale / 2;
++}
++
++static float stbir__filter_triangle(float x, float s)
++{
++    STBIR__UNUSED_PARAM(s);
++
++    x = (float)fabs(x);
++
++    if (x <= 1.0f)
++        return 1 - x;
++    else
++        return 0;
++}
++
++static float stbir__filter_cubic(float x, float s)
++{
++    STBIR__UNUSED_PARAM(s);
++
++    x = (float)fabs(x);
++
++    if (x < 1.0f)
++        return (4 + x*x*(3*x - 6))/6;
++    else if (x < 2.0f)
++        return (8 + x*(-12 + x*(6 - x)))/6;
++
++    return (0.0f);
++}
++
++static float stbir__filter_catmullrom(float x, float s)
++{
++    STBIR__UNUSED_PARAM(s);
++
++    x = (float)fabs(x);
++
++    if (x < 1.0f)
++        return 1 - x*x*(2.5f - 1.5f*x);
++    else if (x < 2.0f)
++        return 2 - x*(4 + x*(0.5f*x - 2.5f));
++
++    return (0.0f);
++}
++
++static float stbir__filter_mitchell(float x, float s)
++{
++    STBIR__UNUSED_PARAM(s);
++
++    x = (float)fabs(x);
++
++    if (x < 1.0f)
++        return (16 + x*x*(21 * x - 36))/18;
++    else if (x < 2.0f)
++        return (32 + x*(-60 + x*(36 - 7*x)))/18;
++
++    return (0.0f);
++}
++
++static float stbir__support_zero(float s)
++{
++    STBIR__UNUSED_PARAM(s);
++    return 0;
++}
++
++static float stbir__support_one(float s)
++{
++    STBIR__UNUSED_PARAM(s);
++    return 1;
++}
++
++static float stbir__support_two(float s)
++{
++    STBIR__UNUSED_PARAM(s);
++    return 2;
++}
++
++static stbir__filter_info stbir__filter_info_table[] = {
++        { NULL,                     stbir__support_zero },
++        { stbir__filter_trapezoid,  stbir__support_trapezoid },
++        { stbir__filter_triangle,   stbir__support_one },
++        { stbir__filter_cubic,      stbir__support_two },
++        { stbir__filter_catmullrom, stbir__support_two },
++        { stbir__filter_mitchell,   stbir__support_two },
++};
++
++stbir__inline static int stbir__use_upsampling(float ratio)
++{
++    return ratio > 1;
++}
++
++stbir__inline static int stbir__use_width_upsampling(stbir__info* stbir_info)
++{
++    return stbir__use_upsampling(stbir_info->horizontal_scale);
++}
++
++stbir__inline static int stbir__use_height_upsampling(stbir__info* stbir_info)
++{
++    return stbir__use_upsampling(stbir_info->vertical_scale);
++}
++
++// This is the maximum number of input samples that can affect an output sample
++// with the given filter
++static int stbir__get_filter_pixel_width(stbir_filter filter, float scale)
++{
++    STBIR_ASSERT(filter != 0);
++    STBIR_ASSERT(filter < STBIR__ARRAY_SIZE(stbir__filter_info_table));
++
++    if (stbir__use_upsampling(scale))
++        return (int)ceil(stbir__filter_info_table[filter].support(1/scale) * 2);
++    else
++        return (int)ceil(stbir__filter_info_table[filter].support(scale) * 2 / scale);
++}
++
++// This is how much to expand buffers to account for filters seeking outside
++// the image boundaries.
++static int stbir__get_filter_pixel_margin(stbir_filter filter, float scale)
++{
++    return stbir__get_filter_pixel_width(filter, scale) / 2;
++}
++
++static int stbir__get_coefficient_width(stbir_filter filter, float scale)
++{
++    if (stbir__use_upsampling(scale))
++        return (int)ceil(stbir__filter_info_table[filter].support(1 / scale) * 2);
++    else
++        return (int)ceil(stbir__filter_info_table[filter].support(scale) * 2);
++}
++
++static int stbir__get_contributors(float scale, stbir_filter filter, int input_size, int output_size)
++{
++    if (stbir__use_upsampling(scale))
++        return output_size;
++    else
++        return (input_size + stbir__get_filter_pixel_margin(filter, scale) * 2);
++}
++
++static int stbir__get_total_horizontal_coefficients(stbir__info* info)
++{
++    return info->horizontal_num_contributors
++         * stbir__get_coefficient_width      (info->horizontal_filter, info->horizontal_scale);
++}
++
++static int stbir__get_total_vertical_coefficients(stbir__info* info)
++{
++    return info->vertical_num_contributors
++         * stbir__get_coefficient_width      (info->vertical_filter, info->vertical_scale);
++}
++
++static stbir__contributors* stbir__get_contributor(stbir__contributors* contributors, int n)
++{
++    return &contributors[n];
++}
++
++// For perf reasons this code is duplicated in stbir__resample_horizontal_upsample/downsample,
++// if you change it here change it there too.
++static float* stbir__get_coefficient(float* coefficients, stbir_filter filter, float scale, int n, int c)
++{
++    int width = stbir__get_coefficient_width(filter, scale);
++    return &coefficients[width*n + c];
++}
++
++static int stbir__edge_wrap_slow(stbir_edge edge, int n, int max)
++{
++    switch (edge)
++    {
++    case STBIR_EDGE_ZERO:
++        return 0; // we'll decode the wrong pixel here, and then overwrite with 0s later
++
++    case STBIR_EDGE_CLAMP:
++        if (n < 0)
++            return 0;
++
++        if (n >= max)
++            return max - 1;
++
++        return n; // NOTREACHED
++
++    case STBIR_EDGE_REFLECT:
++    {
++        if (n < 0)
++        {
++            if (n < max)
++                return -n;
++            else
++                return max - 1;
++        }
++
++        if (n >= max)
++        {
++            int max2 = max * 2;
++            if (n >= max2)
++                return 0;
++            else
++                return max2 - n - 1;
++        }
++
++        return n; // NOTREACHED
++    }
++
++    case STBIR_EDGE_WRAP:
++        if (n >= 0)
++            return (n % max);
++        else
++        {
++            int m = (-n) % max;
++
++            if (m != 0)
++                m = max - m;
++
++            return (m);
++        }
++        // NOTREACHED
++
++    default:
++        STBIR_ASSERT(!"Unimplemented edge type");
++        return 0;
++    }
++}
++
++stbir__inline static int stbir__edge_wrap(stbir_edge edge, int n, int max)
++{
++    // avoid per-pixel switch
++    if (n >= 0 && n < max)
++        return n;
++    return stbir__edge_wrap_slow(edge, n, max);
++}
++
++// What input pixels contribute to this output pixel?
++static void stbir__calculate_sample_range_upsample(int n, float out_filter_radius, float scale_ratio, float out_shift, int* in_first_pixel, int* in_last_pixel, float* in_center_of_out)
++{
++    float out_pixel_center = (float)n + 0.5f;
++    float out_pixel_influence_lowerbound = out_pixel_center - out_filter_radius;
++    float out_pixel_influence_upperbound = out_pixel_center + out_filter_radius;
++
++    float in_pixel_influence_lowerbound = (out_pixel_influence_lowerbound + out_shift) / scale_ratio;
++    float in_pixel_influence_upperbound = (out_pixel_influence_upperbound + out_shift) / scale_ratio;
++
++    *in_center_of_out = (out_pixel_center + out_shift) / scale_ratio;
++    *in_first_pixel = (int)(floor(in_pixel_influence_lowerbound + 0.5));
++    *in_last_pixel = (int)(floor(in_pixel_influence_upperbound - 0.5));
++}
++
++// What output pixels does this input pixel contribute to?
++static void stbir__calculate_sample_range_downsample(int n, float in_pixels_radius, float scale_ratio, float out_shift, int* out_first_pixel, int* out_last_pixel, float* out_center_of_in)
++{
++    float in_pixel_center = (float)n + 0.5f;
++    float in_pixel_influence_lowerbound = in_pixel_center - in_pixels_radius;
++    float in_pixel_influence_upperbound = in_pixel_center + in_pixels_radius;
++
++    float out_pixel_influence_lowerbound = in_pixel_influence_lowerbound * scale_ratio - out_shift;
++    float out_pixel_influence_upperbound = in_pixel_influence_upperbound * scale_ratio - out_shift;
++
++    *out_center_of_in = in_pixel_center * scale_ratio - out_shift;
++    *out_first_pixel = (int)(floor(out_pixel_influence_lowerbound + 0.5));
++    *out_last_pixel = (int)(floor(out_pixel_influence_upperbound - 0.5));
++}
++
++static void stbir__calculate_coefficients_upsample(stbir_filter filter, float scale, int in_first_pixel, int in_last_pixel, float in_center_of_out, stbir__contributors* contributor, float* coefficient_group)
++{
++    int i;
++    float total_filter = 0;
++    float filter_scale;
++
++    STBIR_ASSERT(in_last_pixel - in_first_pixel <= (int)ceil(stbir__filter_info_table[filter].support(1/scale) * 2)); // Taken directly from stbir__get_coefficient_width() which we can't call because we don't know if we're horizontal or vertical.
++
++    contributor->n0 = in_first_pixel;
++    contributor->n1 = in_last_pixel;
++
++    STBIR_ASSERT(contributor->n1 >= contributor->n0);
++
++    for (i = 0; i <= in_last_pixel - in_first_pixel; i++)
++    {
++        float in_pixel_center = (float)(i + in_first_pixel) + 0.5f;
++        coefficient_group[i] = stbir__filter_info_table[filter].kernel(in_center_of_out - in_pixel_center, 1 / scale);
++
++        // If the coefficient is zero, skip it. (Don't do the <0 check here, we want the influence of those outside pixels.)
++        if (i == 0 && !coefficient_group[i])
++        {
++            contributor->n0 = ++in_first_pixel;
++            i--;
++            continue;
++        }
++
++        total_filter += coefficient_group[i];
++    }
++
++    STBIR_ASSERT(stbir__filter_info_table[filter].kernel((float)(in_last_pixel + 1) + 0.5f - in_center_of_out, 1/scale) == 0);
++
++    STBIR_ASSERT(total_filter > 0.9);
++    STBIR_ASSERT(total_filter < 1.1f); // Make sure it's not way off.
++
++    // Make sure the sum of all coefficients is 1.
++    filter_scale = 1 / total_filter;
++
++    for (i = 0; i <= in_last_pixel - in_first_pixel; i++)
++        coefficient_group[i] *= filter_scale;
++
++    for (i = in_last_pixel - in_first_pixel; i >= 0; i--)
++    {
++        if (coefficient_group[i])
++            break;
++
++        // This line has no weight. We can skip it.
++        contributor->n1 = contributor->n0 + i - 1;
++    }
++}
++
++static void stbir__calculate_coefficients_downsample(stbir_filter filter, float scale_ratio, int out_first_pixel, int out_last_pixel, float out_center_of_in, stbir__contributors* contributor, float* coefficient_group)
++{
++    int i;
++
++     STBIR_ASSERT(out_last_pixel - out_first_pixel <= (int)ceil(stbir__filter_info_table[filter].support(scale_ratio) * 2)); // Taken directly from stbir__get_coefficient_width() which we can't call because we don't know if we're horizontal or vertical.
++
++    contributor->n0 = out_first_pixel;
++    contributor->n1 = out_last_pixel;
++
++    STBIR_ASSERT(contributor->n1 >= contributor->n0);
++
++    for (i = 0; i <= out_last_pixel - out_first_pixel; i++)
++    {
++        float out_pixel_center = (float)(i + out_first_pixel) + 0.5f;
++        float x = out_pixel_center - out_center_of_in;
++        coefficient_group[i] = stbir__filter_info_table[filter].kernel(x, scale_ratio) * scale_ratio;
++    }
++
++    STBIR_ASSERT(stbir__filter_info_table[filter].kernel((float)(out_last_pixel + 1) + 0.5f - out_center_of_in, scale_ratio) == 0);
++
++    for (i = out_last_pixel - out_first_pixel; i >= 0; i--)
++    {
++        if (coefficient_group[i])
++            break;
++
++        // This line has no weight. We can skip it.
++        contributor->n1 = contributor->n0 + i - 1;
++    }
++}
++
++static void stbir__normalize_downsample_coefficients(stbir__contributors* contributors, float* coefficients, stbir_filter filter, float scale_ratio, int input_size, int output_size)
++{
++    int num_contributors = stbir__get_contributors(scale_ratio, filter, input_size, output_size);
++    int num_coefficients = stbir__get_coefficient_width(filter, scale_ratio);
++    int i, j;
++    int skip;
++
++    for (i = 0; i < output_size; i++)
++    {
++        float scale;
++        float total = 0;
++
++        for (j = 0; j < num_contributors; j++)
++        {
++            if (i >= contributors[j].n0 && i <= contributors[j].n1)
++            {
++                float coefficient = *stbir__get_coefficient(coefficients, filter, scale_ratio, j, i - contributors[j].n0);
++                total += coefficient;
++            }
++            else if (i < contributors[j].n0)
++                break;
++        }
++
++        STBIR_ASSERT(total > 0.9f);
++        STBIR_ASSERT(total < 1.1f);
++
++        scale = 1 / total;
++
++        for (j = 0; j < num_contributors; j++)
++        {
++            if (i >= contributors[j].n0 && i <= contributors[j].n1)
++                *stbir__get_coefficient(coefficients, filter, scale_ratio, j, i - contributors[j].n0) *= scale;
++            else if (i < contributors[j].n0)
++                break;
++        }
++    }
++
++    // Optimize: Skip zero coefficients and contributions outside of image bounds.
++    // Do this after normalizing because normalization depends on the n0/n1 values.
++    for (j = 0; j < num_contributors; j++)
++    {
++        int range, max, width;
++
++        skip = 0;
++        while (*stbir__get_coefficient(coefficients, filter, scale_ratio, j, skip) == 0)
++            skip++;
++
++        contributors[j].n0 += skip;
++
++        while (contributors[j].n0 < 0)
++        {
++            contributors[j].n0++;
++            skip++;
++        }
++
++        range = contributors[j].n1 - contributors[j].n0 + 1;
++        max = stbir__min(num_coefficients, range);
++
++        width = stbir__get_coefficient_width(filter, scale_ratio);
++        for (i = 0; i < max; i++)
++        {
++            if (i + skip >= width)
++                break;
++
++            *stbir__get_coefficient(coefficients, filter, scale_ratio, j, i) = *stbir__get_coefficient(coefficients, filter, scale_ratio, j, i + skip);
++        }
++
++        continue;
++    }
++
++    // Using min to avoid writing into invalid pixels.
++    for (i = 0; i < num_contributors; i++)
++        contributors[i].n1 = stbir__min(contributors[i].n1, output_size - 1);
++}
++
++// Each scan line uses the same kernel values so we should calculate the kernel
++// values once and then we can use them for every scan line.
++static void stbir__calculate_filters(stbir__contributors* contributors, float* coefficients, stbir_filter filter, float scale_ratio, float shift, int input_size, int output_size)
++{
++    int n;
++    int total_contributors = stbir__get_contributors(scale_ratio, filter, input_size, output_size);
++
++    if (stbir__use_upsampling(scale_ratio))
++    {
++        float out_pixels_radius = stbir__filter_info_table[filter].support(1 / scale_ratio) * scale_ratio;
++
++        // Looping through out pixels
++        for (n = 0; n < total_contributors; n++)
++        {
++            float in_center_of_out; // Center of the current out pixel in the in pixel space
++            int in_first_pixel, in_last_pixel;
++
++            stbir__calculate_sample_range_upsample(n, out_pixels_radius, scale_ratio, shift, &in_first_pixel, &in_last_pixel, &in_center_of_out);
++
++            stbir__calculate_coefficients_upsample(filter, scale_ratio, in_first_pixel, in_last_pixel, in_center_of_out, stbir__get_contributor(contributors, n), stbir__get_coefficient(coefficients, filter, scale_ratio, n, 0));
++        }
++    }
++    else
++    {
++        float in_pixels_radius = stbir__filter_info_table[filter].support(scale_ratio) / scale_ratio;
++
++        // Looping through in pixels
++        for (n = 0; n < total_contributors; n++)
++        {
++            float out_center_of_in; // Center of the current out pixel in the in pixel space
++            int out_first_pixel, out_last_pixel;
++            int n_adjusted = n - stbir__get_filter_pixel_margin(filter, scale_ratio);
++
++            stbir__calculate_sample_range_downsample(n_adjusted, in_pixels_radius, scale_ratio, shift, &out_first_pixel, &out_last_pixel, &out_center_of_in);
++
++            stbir__calculate_coefficients_downsample(filter, scale_ratio, out_first_pixel, out_last_pixel, out_center_of_in, stbir__get_contributor(contributors, n), stbir__get_coefficient(coefficients, filter, scale_ratio, n, 0));
++        }
++
++        stbir__normalize_downsample_coefficients(contributors, coefficients, filter, scale_ratio, input_size, output_size);
++    }
++}
++
++static float* stbir__get_decode_buffer(stbir__info* stbir_info)
++{
++    // The 0 index of the decode buffer starts after the margin. This makes
++    // it okay to use negative indexes on the decode buffer.
++    return &stbir_info->decode_buffer[stbir_info->horizontal_filter_pixel_margin * stbir_info->channels];
++}
++
++#define STBIR__DECODE(type, colorspace) ((type) * (STBIR_MAX_COLORSPACES) + (colorspace))
++
++static void stbir__decode_scanline(stbir__info* stbir_info, int n)
++{
++    int c;
++    int channels = stbir_info->channels;
++    int alpha_channel = stbir_info->alpha_channel;
++    int type = stbir_info->type;
++    int colorspace = stbir_info->colorspace;
++    int input_w = stbir_info->input_w;
++    size_t input_stride_bytes = stbir_info->input_stride_bytes;
++    float* decode_buffer = stbir__get_decode_buffer(stbir_info);
++    stbir_edge edge_horizontal = stbir_info->edge_horizontal;
++    stbir_edge edge_vertical = stbir_info->edge_vertical;
++    size_t in_buffer_row_offset = stbir__edge_wrap(edge_vertical, n, stbir_info->input_h) * input_stride_bytes;
++    const void* input_data = (char *) stbir_info->input_data + in_buffer_row_offset;
++    int max_x = input_w + stbir_info->horizontal_filter_pixel_margin;
++    int decode = STBIR__DECODE(type, colorspace);
++
++    int x = -stbir_info->horizontal_filter_pixel_margin;
++
++    // special handling for STBIR_EDGE_ZERO because it needs to return an item that doesn't appear in the input,
++    // and we want to avoid paying overhead on every pixel if not STBIR_EDGE_ZERO
++    if (edge_vertical == STBIR_EDGE_ZERO && (n < 0 || n >= stbir_info->input_h))
++    {
++        for (; x < max_x; x++)
++            for (c = 0; c < channels; c++)
++                decode_buffer[x*channels + c] = 0;
++        return;
++    }
++
++    switch (decode)
++    {
++    case STBIR__DECODE(STBIR_TYPE_UINT8, STBIR_COLORSPACE_LINEAR):
++        for (; x < max_x; x++)
++        {
++            int decode_pixel_index = x * channels;
++            int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++            for (c = 0; c < channels; c++)
++                decode_buffer[decode_pixel_index + c] = ((float)((const unsigned char*)input_data)[input_pixel_index + c]) / stbir__max_uint8_as_float;
++        }
++        break;
++
++    case STBIR__DECODE(STBIR_TYPE_UINT8, STBIR_COLORSPACE_SRGB):
++        for (; x < max_x; x++)
++        {
++            int decode_pixel_index = x * channels;
++            int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++            for (c = 0; c < channels; c++)
++                decode_buffer[decode_pixel_index + c] = stbir__srgb_uchar_to_linear_float[((const unsigned char*)input_data)[input_pixel_index + c]];
++
++            if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++                decode_buffer[decode_pixel_index + alpha_channel] = ((float)((const unsigned char*)input_data)[input_pixel_index + alpha_channel]) / stbir__max_uint8_as_float;
++        }
++        break;
++
++    case STBIR__DECODE(STBIR_TYPE_UINT16, STBIR_COLORSPACE_LINEAR):
++        for (; x < max_x; x++)
++        {
++            int decode_pixel_index = x * channels;
++            int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++            for (c = 0; c < channels; c++)
++                decode_buffer[decode_pixel_index + c] = ((float)((const unsigned short*)input_data)[input_pixel_index + c]) / stbir__max_uint16_as_float;
++        }
++        break;
++
++    case STBIR__DECODE(STBIR_TYPE_UINT16, STBIR_COLORSPACE_SRGB):
++        for (; x < max_x; x++)
++        {
++            int decode_pixel_index = x * channels;
++            int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++            for (c = 0; c < channels; c++)
++                decode_buffer[decode_pixel_index + c] = stbir__srgb_to_linear(((float)((const unsigned short*)input_data)[input_pixel_index + c]) / stbir__max_uint16_as_float);
++
++            if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++                decode_buffer[decode_pixel_index + alpha_channel] = ((float)((const unsigned short*)input_data)[input_pixel_index + alpha_channel]) / stbir__max_uint16_as_float;
++        }
++        break;
++
++    case STBIR__DECODE(STBIR_TYPE_UINT32, STBIR_COLORSPACE_LINEAR):
++        for (; x < max_x; x++)
++        {
++            int decode_pixel_index = x * channels;
++            int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++            for (c = 0; c < channels; c++)
++                decode_buffer[decode_pixel_index + c] = (float)(((double)((const unsigned int*)input_data)[input_pixel_index + c]) / stbir__max_uint32_as_float);
++        }
++        break;
++
++    case STBIR__DECODE(STBIR_TYPE_UINT32, STBIR_COLORSPACE_SRGB):
++        for (; x < max_x; x++)
++        {
++            int decode_pixel_index = x * channels;
++            int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++            for (c = 0; c < channels; c++)
++                decode_buffer[decode_pixel_index + c] = stbir__srgb_to_linear((float)(((double)((const unsigned int*)input_data)[input_pixel_index + c]) / stbir__max_uint32_as_float));
++
++            if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++                decode_buffer[decode_pixel_index + alpha_channel] = (float)(((double)((const unsigned int*)input_data)[input_pixel_index + alpha_channel]) / stbir__max_uint32_as_float);
++        }
++        break;
++
++    case STBIR__DECODE(STBIR_TYPE_FLOAT, STBIR_COLORSPACE_LINEAR):
++        for (; x < max_x; x++)
++        {
++            int decode_pixel_index = x * channels;
++            int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++            for (c = 0; c < channels; c++)
++                decode_buffer[decode_pixel_index + c] = ((const float*)input_data)[input_pixel_index + c];
++        }
++        break;
++
++    case STBIR__DECODE(STBIR_TYPE_FLOAT, STBIR_COLORSPACE_SRGB):
++        for (; x < max_x; x++)
++        {
++            int decode_pixel_index = x * channels;
++            int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++            for (c = 0; c < channels; c++)
++                decode_buffer[decode_pixel_index + c] = stbir__srgb_to_linear(((const float*)input_data)[input_pixel_index + c]);
++
++            if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++                decode_buffer[decode_pixel_index + alpha_channel] = ((const float*)input_data)[input_pixel_index + alpha_channel];
++        }
++
++        break;
++
++    default:
++        STBIR_ASSERT(!"Unknown type/colorspace/channels combination.");
++        break;
++    }
++
++    if (!(stbir_info->flags & STBIR_FLAG_ALPHA_PREMULTIPLIED))
++    {
++        for (x = -stbir_info->horizontal_filter_pixel_margin; x < max_x; x++)
++        {
++            int decode_pixel_index = x * channels;
++
++            // If the alpha value is 0 it will clobber the color values. Make sure it's not.
++            float alpha = decode_buffer[decode_pixel_index + alpha_channel];
++#ifndef STBIR_NO_ALPHA_EPSILON
++            if (stbir_info->type != STBIR_TYPE_FLOAT) {
++                alpha += STBIR_ALPHA_EPSILON;
++                decode_buffer[decode_pixel_index + alpha_channel] = alpha;
++            }
++#endif
++            for (c = 0; c < channels; c++)
++            {
++                if (c == alpha_channel)
++                    continue;
++
++                decode_buffer[decode_pixel_index + c] *= alpha;
++            }
++        }
++    }
++
++    if (edge_horizontal == STBIR_EDGE_ZERO)
++    {
++        for (x = -stbir_info->horizontal_filter_pixel_margin; x < 0; x++)
++        {
++            for (c = 0; c < channels; c++)
++                decode_buffer[x*channels + c] = 0;
++        }
++        for (x = input_w; x < max_x; x++)
++        {
++            for (c = 0; c < channels; c++)
++                decode_buffer[x*channels + c] = 0;
++        }
++    }
++}
++
++static float* stbir__get_ring_buffer_entry(float* ring_buffer, int index, int ring_buffer_length)
++{
++    return &ring_buffer[index * ring_buffer_length];
++}
++
++static float* stbir__add_empty_ring_buffer_entry(stbir__info* stbir_info, int n)
++{
++    int ring_buffer_index;
++    float* ring_buffer;
++
++    stbir_info->ring_buffer_last_scanline = n;
++
++    if (stbir_info->ring_buffer_begin_index < 0)
++    {
++        ring_buffer_index = stbir_info->ring_buffer_begin_index = 0;
++        stbir_info->ring_buffer_first_scanline = n;
++    }
++    else
++    {
++        ring_buffer_index = (stbir_info->ring_buffer_begin_index + (stbir_info->ring_buffer_last_scanline - stbir_info->ring_buffer_first_scanline)) % stbir_info->ring_buffer_num_entries;
++        STBIR_ASSERT(ring_buffer_index != stbir_info->ring_buffer_begin_index);
++    }
++
++    ring_buffer = stbir__get_ring_buffer_entry(stbir_info->ring_buffer, ring_buffer_index, stbir_info->ring_buffer_length_bytes / sizeof(float));
++    memset(ring_buffer, 0, stbir_info->ring_buffer_length_bytes);
++
++    return ring_buffer;
++}
++
++
++static void stbir__resample_horizontal_upsample(stbir__info* stbir_info, float* output_buffer)
++{
++    int x, k;
++    int output_w = stbir_info->output_w;
++    int channels = stbir_info->channels;
++    float* decode_buffer = stbir__get_decode_buffer(stbir_info);
++    stbir__contributors* horizontal_contributors = stbir_info->horizontal_contributors;
++    float* horizontal_coefficients = stbir_info->horizontal_coefficients;
++    int coefficient_width = stbir_info->horizontal_coefficient_width;
++
++    for (x = 0; x < output_w; x++)
++    {
++        int n0 = horizontal_contributors[x].n0;
++        int n1 = horizontal_contributors[x].n1;
++
++        int out_pixel_index = x * channels;
++        int coefficient_group = coefficient_width * x;
++        int coefficient_counter = 0;
++
++        STBIR_ASSERT(n1 >= n0);
++        STBIR_ASSERT(n0 >= -stbir_info->horizontal_filter_pixel_margin);
++        STBIR_ASSERT(n1 >= -stbir_info->horizontal_filter_pixel_margin);
++        STBIR_ASSERT(n0 < stbir_info->input_w + stbir_info->horizontal_filter_pixel_margin);
++        STBIR_ASSERT(n1 < stbir_info->input_w + stbir_info->horizontal_filter_pixel_margin);
++
++        switch (channels) {
++            case 1:
++                for (k = n0; k <= n1; k++)
++                {
++                    int in_pixel_index = k * 1;
++                    float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++                    STBIR_ASSERT(coefficient != 0);
++                    output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++                }
++                break;
++            case 2:
++                for (k = n0; k <= n1; k++)
++                {
++                    int in_pixel_index = k * 2;
++                    float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++                    STBIR_ASSERT(coefficient != 0);
++                    output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++                    output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++                }
++                break;
++            case 3:
++                for (k = n0; k <= n1; k++)
++                {
++                    int in_pixel_index = k * 3;
++                    float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++                    STBIR_ASSERT(coefficient != 0);
++                    output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++                    output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++                    output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient;
++                }
++                break;
++            case 4:
++                for (k = n0; k <= n1; k++)
++                {
++                    int in_pixel_index = k * 4;
++                    float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++                    STBIR_ASSERT(coefficient != 0);
++                    output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++                    output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++                    output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient;
++                    output_buffer[out_pixel_index + 3] += decode_buffer[in_pixel_index + 3] * coefficient;
++                }
++                break;
++            default:
++                for (k = n0; k <= n1; k++)
++                {
++                    int in_pixel_index = k * channels;
++                    float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++                    int c;
++                    STBIR_ASSERT(coefficient != 0);
++                    for (c = 0; c < channels; c++)
++                        output_buffer[out_pixel_index + c] += decode_buffer[in_pixel_index + c] * coefficient;
++                }
++                break;
++        }
++    }
++}
++
++static void stbir__resample_horizontal_downsample(stbir__info* stbir_info, float* output_buffer)
++{
++    int x, k;
++    int input_w = stbir_info->input_w;
++    int channels = stbir_info->channels;
++    float* decode_buffer = stbir__get_decode_buffer(stbir_info);
++    stbir__contributors* horizontal_contributors = stbir_info->horizontal_contributors;
++    float* horizontal_coefficients = stbir_info->horizontal_coefficients;
++    int coefficient_width = stbir_info->horizontal_coefficient_width;
++    int filter_pixel_margin = stbir_info->horizontal_filter_pixel_margin;
++    int max_x = input_w + filter_pixel_margin * 2;
++
++    STBIR_ASSERT(!stbir__use_width_upsampling(stbir_info));
++
++    switch (channels) {
++        case 1:
++            for (x = 0; x < max_x; x++)
++            {
++                int n0 = horizontal_contributors[x].n0;
++                int n1 = horizontal_contributors[x].n1;
++
++                int in_x = x - filter_pixel_margin;
++                int in_pixel_index = in_x * 1;
++                int max_n = n1;
++                int coefficient_group = coefficient_width * x;
++
++                for (k = n0; k <= max_n; k++)
++                {
++                    int out_pixel_index = k * 1;
++                    float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++                    STBIR_ASSERT(coefficient != 0);
++                    output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++                }
++            }
++            break;
++
++        case 2:
++            for (x = 0; x < max_x; x++)
++            {
++                int n0 = horizontal_contributors[x].n0;
++                int n1 = horizontal_contributors[x].n1;
++
++                int in_x = x - filter_pixel_margin;
++                int in_pixel_index = in_x * 2;
++                int max_n = n1;
++                int coefficient_group = coefficient_width * x;
++
++                for (k = n0; k <= max_n; k++)
++                {
++                    int out_pixel_index = k * 2;
++                    float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++                    STBIR_ASSERT(coefficient != 0);
++                    output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++                    output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++                }
++            }
++            break;
++
++        case 3:
++            for (x = 0; x < max_x; x++)
++            {
++                int n0 = horizontal_contributors[x].n0;
++                int n1 = horizontal_contributors[x].n1;
++
++                int in_x = x - filter_pixel_margin;
++                int in_pixel_index = in_x * 3;
++                int max_n = n1;
++                int coefficient_group = coefficient_width * x;
++
++                for (k = n0; k <= max_n; k++)
++                {
++                    int out_pixel_index = k * 3;
++                    float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++                    STBIR_ASSERT(coefficient != 0);
++                    output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++                    output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++                    output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient;
++                }
++            }
++            break;
++
++        case 4:
++            for (x = 0; x < max_x; x++)
++            {
++                int n0 = horizontal_contributors[x].n0;
++                int n1 = horizontal_contributors[x].n1;
++
++                int in_x = x - filter_pixel_margin;
++                int in_pixel_index = in_x * 4;
++                int max_n = n1;
++                int coefficient_group = coefficient_width * x;
++
++                for (k = n0; k <= max_n; k++)
++                {
++                    int out_pixel_index = k * 4;
++                    float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++                    STBIR_ASSERT(coefficient != 0);
++                    output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++                    output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++                    output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient;
++                    output_buffer[out_pixel_index + 3] += decode_buffer[in_pixel_index + 3] * coefficient;
++                }
++            }
++            break;
++
++        default:
++            for (x = 0; x < max_x; x++)
++            {
++                int n0 = horizontal_contributors[x].n0;
++                int n1 = horizontal_contributors[x].n1;
++
++                int in_x = x - filter_pixel_margin;
++                int in_pixel_index = in_x * channels;
++                int max_n = n1;
++                int coefficient_group = coefficient_width * x;
++
++                for (k = n0; k <= max_n; k++)
++                {
++                    int c;
++                    int out_pixel_index = k * channels;
++                    float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++                    STBIR_ASSERT(coefficient != 0);
++                    for (c = 0; c < channels; c++)
++                        output_buffer[out_pixel_index + c] += decode_buffer[in_pixel_index + c] * coefficient;
++                }
++            }
++            break;
++    }
++}
++
++static void stbir__decode_and_resample_upsample(stbir__info* stbir_info, int n)
++{
++    // Decode the nth scanline from the source image into the decode buffer.
++    stbir__decode_scanline(stbir_info, n);
++
++    // Now resample it into the ring buffer.
++    if (stbir__use_width_upsampling(stbir_info))
++        stbir__resample_horizontal_upsample(stbir_info, stbir__add_empty_ring_buffer_entry(stbir_info, n));
++    else
++        stbir__resample_horizontal_downsample(stbir_info, stbir__add_empty_ring_buffer_entry(stbir_info, n));
++
++    // Now it's sitting in the ring buffer ready to be used as source for the vertical sampling.
++}
++
++static void stbir__decode_and_resample_downsample(stbir__info* stbir_info, int n)
++{
++    // Decode the nth scanline from the source image into the decode buffer.
++    stbir__decode_scanline(stbir_info, n);
++
++    memset(stbir_info->horizontal_buffer, 0, stbir_info->output_w * stbir_info->channels * sizeof(float));
++
++    // Now resample it into the horizontal buffer.
++    if (stbir__use_width_upsampling(stbir_info))
++        stbir__resample_horizontal_upsample(stbir_info, stbir_info->horizontal_buffer);
++    else
++        stbir__resample_horizontal_downsample(stbir_info, stbir_info->horizontal_buffer);
++
++    // Now it's sitting in the horizontal buffer ready to be distributed into the ring buffers.
++}
++
++// Get the specified scan line from the ring buffer.
++static float* stbir__get_ring_buffer_scanline(int get_scanline, float* ring_buffer, int begin_index, int first_scanline, int ring_buffer_num_entries, int ring_buffer_length)
++{
++    int ring_buffer_index = (begin_index + (get_scanline - first_scanline)) % ring_buffer_num_entries;
++    return stbir__get_ring_buffer_entry(ring_buffer, ring_buffer_index, ring_buffer_length);
++}
++
++
++static void stbir__encode_scanline(stbir__info* stbir_info, int num_pixels, void *output_buffer, float *encode_buffer, int channels, int alpha_channel, int decode)
++{
++    int x;
++    int n;
++    int num_nonalpha;
++    stbir_uint16 nonalpha[STBIR_MAX_CHANNELS];
++
++    if (!(stbir_info->flags&STBIR_FLAG_ALPHA_PREMULTIPLIED))
++    {
++        for (x=0; x < num_pixels; ++x)
++        {
++            int pixel_index = x*channels;
++
++            float alpha = encode_buffer[pixel_index + alpha_channel];
++            float reciprocal_alpha = alpha ? 1.0f / alpha : 0;
++
++            // unrolling this produced a 1% slowdown upscaling a large RGBA linear-space image on my machine - stb
++            for (n = 0; n < channels; n++)
++                if (n != alpha_channel)
++                    encode_buffer[pixel_index + n] *= reciprocal_alpha;
++
++            // We added in a small epsilon to prevent the color channel from being deleted with zero alpha.
++            // Because we only add it for integer types, it will automatically be discarded on integer
++            // conversion, so we don't need to subtract it back out (which would be problematic for
++            // numeric precision reasons).
++        }
++    }
++
++    // build a table of all channels that need colorspace correction, so
++    // we don't perform colorspace correction on channels that don't need it.
++    for (x = 0, num_nonalpha = 0; x < channels; ++x)
++    {
++        if (x != alpha_channel || (stbir_info->flags & STBIR_FLAG_ALPHA_USES_COLORSPACE))
++        {
++            nonalpha[num_nonalpha++] = (stbir_uint16)x;
++        }
++    }
++
++    #define STBIR__ROUND_INT(f)    ((int)          ((f)+0.5))
++    #define STBIR__ROUND_UINT(f)   ((stbir_uint32) ((f)+0.5))
++
++    #ifdef STBIR__SATURATE_INT
++    #define STBIR__ENCODE_LINEAR8(f)   stbir__saturate8 (STBIR__ROUND_INT((f) * stbir__max_uint8_as_float ))
++    #define STBIR__ENCODE_LINEAR16(f)  stbir__saturate16(STBIR__ROUND_INT((f) * stbir__max_uint16_as_float))
++    #else
++    #define STBIR__ENCODE_LINEAR8(f)   (unsigned char ) STBIR__ROUND_INT(stbir__saturate(f) * stbir__max_uint8_as_float )
++    #define STBIR__ENCODE_LINEAR16(f)  (unsigned short) STBIR__ROUND_INT(stbir__saturate(f) * stbir__max_uint16_as_float)
++    #endif
++
++    switch (decode)
++    {
++        case STBIR__DECODE(STBIR_TYPE_UINT8, STBIR_COLORSPACE_LINEAR):
++            for (x=0; x < num_pixels; ++x)
++            {
++                int pixel_index = x*channels;
++
++                for (n = 0; n < channels; n++)
++                {
++                    int index = pixel_index + n;
++                    ((unsigned char*)output_buffer)[index] = STBIR__ENCODE_LINEAR8(encode_buffer[index]);
++                }
++            }
++            break;
++
++        case STBIR__DECODE(STBIR_TYPE_UINT8, STBIR_COLORSPACE_SRGB):
++            for (x=0; x < num_pixels; ++x)
++            {
++                int pixel_index = x*channels;
++
++                for (n = 0; n < num_nonalpha; n++)
++                {
++                    int index = pixel_index + nonalpha[n];
++                    ((unsigned char*)output_buffer)[index] = stbir__linear_to_srgb_uchar(encode_buffer[index]);
++                }
++
++                if (!(stbir_info->flags & STBIR_FLAG_ALPHA_USES_COLORSPACE))
++                    ((unsigned char *)output_buffer)[pixel_index + alpha_channel] = STBIR__ENCODE_LINEAR8(encode_buffer[pixel_index+alpha_channel]);
++            }
++            break;
++
++        case STBIR__DECODE(STBIR_TYPE_UINT16, STBIR_COLORSPACE_LINEAR):
++            for (x=0; x < num_pixels; ++x)
++            {
++                int pixel_index = x*channels;
++
++                for (n = 0; n < channels; n++)
++                {
++                    int index = pixel_index + n;
++                    ((unsigned short*)output_buffer)[index] = STBIR__ENCODE_LINEAR16(encode_buffer[index]);
++                }
++            }
++            break;
++
++        case STBIR__DECODE(STBIR_TYPE_UINT16, STBIR_COLORSPACE_SRGB):
++            for (x=0; x < num_pixels; ++x)
++            {
++                int pixel_index = x*channels;
++
++                for (n = 0; n < num_nonalpha; n++)
++                {
++                    int index = pixel_index + nonalpha[n];
++                    ((unsigned short*)output_buffer)[index] = (unsigned short)STBIR__ROUND_INT(stbir__linear_to_srgb(stbir__saturate(encode_buffer[index])) * stbir__max_uint16_as_float);
++                }
++
++                if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++                    ((unsigned short*)output_buffer)[pixel_index + alpha_channel] = STBIR__ENCODE_LINEAR16(encode_buffer[pixel_index + alpha_channel]);
++            }
++
++            break;
++
++        case STBIR__DECODE(STBIR_TYPE_UINT32, STBIR_COLORSPACE_LINEAR):
++            for (x=0; x < num_pixels; ++x)
++            {
++                int pixel_index = x*channels;
++
++                for (n = 0; n < channels; n++)
++                {
++                    int index = pixel_index + n;
++                    ((unsigned int*)output_buffer)[index] = (unsigned int)STBIR__ROUND_UINT(((double)stbir__saturate(encode_buffer[index])) * stbir__max_uint32_as_float);
++                }
++            }
++            break;
++
++        case STBIR__DECODE(STBIR_TYPE_UINT32, STBIR_COLORSPACE_SRGB):
++            for (x=0; x < num_pixels; ++x)
++            {
++                int pixel_index = x*channels;
++
++                for (n = 0; n < num_nonalpha; n++)
++                {
++                    int index = pixel_index + nonalpha[n];
++                    ((unsigned int*)output_buffer)[index] = (unsigned int)STBIR__ROUND_UINT(((double)stbir__linear_to_srgb(stbir__saturate(encode_buffer[index]))) * stbir__max_uint32_as_float);
++                }
++
++                if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++                    ((unsigned int*)output_buffer)[pixel_index + alpha_channel] = (unsigned int)STBIR__ROUND_INT(((double)stbir__saturate(encode_buffer[pixel_index + alpha_channel])) * stbir__max_uint32_as_float);
++            }
++            break;
++
++        case STBIR__DECODE(STBIR_TYPE_FLOAT, STBIR_COLORSPACE_LINEAR):
++            for (x=0; x < num_pixels; ++x)
++            {
++                int pixel_index = x*channels;
++
++                for (n = 0; n < channels; n++)
++                {
++                    int index = pixel_index + n;
++                    ((float*)output_buffer)[index] = encode_buffer[index];
++                }
++            }
++            break;
++
++        case STBIR__DECODE(STBIR_TYPE_FLOAT, STBIR_COLORSPACE_SRGB):
++            for (x=0; x < num_pixels; ++x)
++            {
++                int pixel_index = x*channels;
++
++                for (n = 0; n < num_nonalpha; n++)
++                {
++                    int index = pixel_index + nonalpha[n];
++                    ((float*)output_buffer)[index] = stbir__linear_to_srgb(encode_buffer[index]);
++                }
++
++                if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++                    ((float*)output_buffer)[pixel_index + alpha_channel] = encode_buffer[pixel_index + alpha_channel];
++            }
++            break;
++
++        default:
++            STBIR_ASSERT(!"Unknown type/colorspace/channels combination.");
++            break;
++    }
++}
++
++static void stbir__resample_vertical_upsample(stbir__info* stbir_info, int n)
++{
++    int x, k;
++    int output_w = stbir_info->output_w;
++    stbir__contributors* vertical_contributors = stbir_info->vertical_contributors;
++    float* vertical_coefficients = stbir_info->vertical_coefficients;
++    int channels = stbir_info->channels;
++    int alpha_channel = stbir_info->alpha_channel;
++    int type = stbir_info->type;
++    int colorspace = stbir_info->colorspace;
++    int ring_buffer_entries = stbir_info->ring_buffer_num_entries;
++    void* output_data = stbir_info->output_data;
++    float* encode_buffer = stbir_info->encode_buffer;
++    int decode = STBIR__DECODE(type, colorspace);
++    int coefficient_width = stbir_info->vertical_coefficient_width;
++    int coefficient_counter;
++    int contributor = n;
++
++    float* ring_buffer = stbir_info->ring_buffer;
++    int ring_buffer_begin_index = stbir_info->ring_buffer_begin_index;
++    int ring_buffer_first_scanline = stbir_info->ring_buffer_first_scanline;
++    int ring_buffer_length = stbir_info->ring_buffer_length_bytes/sizeof(float);
++
++    int n0,n1, output_row_start;
++    int coefficient_group = coefficient_width * contributor;
++
++    n0 = vertical_contributors[contributor].n0;
++    n1 = vertical_contributors[contributor].n1;
++
++    output_row_start = n * stbir_info->output_stride_bytes;
++
++    STBIR_ASSERT(stbir__use_height_upsampling(stbir_info));
++
++    memset(encode_buffer, 0, output_w * sizeof(float) * channels);
++
++    // I tried reblocking this for better cache usage of encode_buffer
++    // (using x_outer, k, x_inner), but it lost speed. -- stb
++
++    coefficient_counter = 0;
++    switch (channels) {
++        case 1:
++            for (k = n0; k <= n1; k++)
++            {
++                int coefficient_index = coefficient_counter++;
++                float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++                float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++                for (x = 0; x < output_w; ++x)
++                {
++                    int in_pixel_index = x * 1;
++                    encode_buffer[in_pixel_index + 0] += ring_buffer_entry[in_pixel_index + 0] * coefficient;
++                }
++            }
++            break;
++        case 2:
++            for (k = n0; k <= n1; k++)
++            {
++                int coefficient_index = coefficient_counter++;
++                float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++                float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++                for (x = 0; x < output_w; ++x)
++                {
++                    int in_pixel_index = x * 2;
++                    encode_buffer[in_pixel_index + 0] += ring_buffer_entry[in_pixel_index + 0] * coefficient;
++                    encode_buffer[in_pixel_index + 1] += ring_buffer_entry[in_pixel_index + 1] * coefficient;
++                }
++            }
++            break;
++        case 3:
++            for (k = n0; k <= n1; k++)
++            {
++                int coefficient_index = coefficient_counter++;
++                float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++                float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++                for (x = 0; x < output_w; ++x)
++                {
++                    int in_pixel_index = x * 3;
++                    encode_buffer[in_pixel_index + 0] += ring_buffer_entry[in_pixel_index + 0] * coefficient;
++                    encode_buffer[in_pixel_index + 1] += ring_buffer_entry[in_pixel_index + 1] * coefficient;
++                    encode_buffer[in_pixel_index + 2] += ring_buffer_entry[in_pixel_index + 2] * coefficient;
++                }
++            }
++            break;
++        case 4:
++            for (k = n0; k <= n1; k++)
++            {
++                int coefficient_index = coefficient_counter++;
++                float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++                float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++                for (x = 0; x < output_w; ++x)
++                {
++                    int in_pixel_index = x * 4;
++                    encode_buffer[in_pixel_index + 0] += ring_buffer_entry[in_pixel_index + 0] * coefficient;
++                    encode_buffer[in_pixel_index + 1] += ring_buffer_entry[in_pixel_index + 1] * coefficient;
++                    encode_buffer[in_pixel_index + 2] += ring_buffer_entry[in_pixel_index + 2] * coefficient;
++                    encode_buffer[in_pixel_index + 3] += ring_buffer_entry[in_pixel_index + 3] * coefficient;
++                }
++            }
++            break;
++        default:
++            for (k = n0; k <= n1; k++)
++            {
++                int coefficient_index = coefficient_counter++;
++                float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++                float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++                for (x = 0; x < output_w; ++x)
++                {
++                    int in_pixel_index = x * channels;
++                    int c;
++                    for (c = 0; c < channels; c++)
++                        encode_buffer[in_pixel_index + c] += ring_buffer_entry[in_pixel_index + c] * coefficient;
++                }
++            }
++            break;
++    }
++    stbir__encode_scanline(stbir_info, output_w, (char *) output_data + output_row_start, encode_buffer, channels, alpha_channel, decode);
++}
++
++static void stbir__resample_vertical_downsample(stbir__info* stbir_info, int n)
++{
++    int x, k;
++    int output_w = stbir_info->output_w;
++    stbir__contributors* vertical_contributors = stbir_info->vertical_contributors;
++    float* vertical_coefficients = stbir_info->vertical_coefficients;
++    int channels = stbir_info->channels;
++    int ring_buffer_entries = stbir_info->ring_buffer_num_entries;
++    float* horizontal_buffer = stbir_info->horizontal_buffer;
++    int coefficient_width = stbir_info->vertical_coefficient_width;
++    int contributor = n + stbir_info->vertical_filter_pixel_margin;
++
++    float* ring_buffer = stbir_info->ring_buffer;
++    int ring_buffer_begin_index = stbir_info->ring_buffer_begin_index;
++    int ring_buffer_first_scanline = stbir_info->ring_buffer_first_scanline;
++    int ring_buffer_length = stbir_info->ring_buffer_length_bytes/sizeof(float);
++    int n0,n1;
++
++    n0 = vertical_contributors[contributor].n0;
++    n1 = vertical_contributors[contributor].n1;
++
++    STBIR_ASSERT(!stbir__use_height_upsampling(stbir_info));
++
++    for (k = n0; k <= n1; k++)
++    {
++        int coefficient_index = k - n0;
++        int coefficient_group = coefficient_width * contributor;
++        float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++
++        float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++
++        switch (channels) {
++            case 1:
++                for (x = 0; x < output_w; x++)
++                {
++                    int in_pixel_index = x * 1;
++                    ring_buffer_entry[in_pixel_index + 0] += horizontal_buffer[in_pixel_index + 0] * coefficient;
++                }
++                break;
++            case 2:
++                for (x = 0; x < output_w; x++)
++                {
++                    int in_pixel_index = x * 2;
++                    ring_buffer_entry[in_pixel_index + 0] += horizontal_buffer[in_pixel_index + 0] * coefficient;
++                    ring_buffer_entry[in_pixel_index + 1] += horizontal_buffer[in_pixel_index + 1] * coefficient;
++                }
++                break;
++            case 3:
++                for (x = 0; x < output_w; x++)
++                {
++                    int in_pixel_index = x * 3;
++                    ring_buffer_entry[in_pixel_index + 0] += horizontal_buffer[in_pixel_index + 0] * coefficient;
++                    ring_buffer_entry[in_pixel_index + 1] += horizontal_buffer[in_pixel_index + 1] * coefficient;
++                    ring_buffer_entry[in_pixel_index + 2] += horizontal_buffer[in_pixel_index + 2] * coefficient;
++                }
++                break;
++            case 4:
++                for (x = 0; x < output_w; x++)
++                {
++                    int in_pixel_index = x * 4;
++                    ring_buffer_entry[in_pixel_index + 0] += horizontal_buffer[in_pixel_index + 0] * coefficient;
++                    ring_buffer_entry[in_pixel_index + 1] += horizontal_buffer[in_pixel_index + 1] * coefficient;
++                    ring_buffer_entry[in_pixel_index + 2] += horizontal_buffer[in_pixel_index + 2] * coefficient;
++                    ring_buffer_entry[in_pixel_index + 3] += horizontal_buffer[in_pixel_index + 3] * coefficient;
++                }
++                break;
++            default:
++                for (x = 0; x < output_w; x++)
++                {
++                    int in_pixel_index = x * channels;
++
++                    int c;
++                    for (c = 0; c < channels; c++)
++                        ring_buffer_entry[in_pixel_index + c] += horizontal_buffer[in_pixel_index + c] * coefficient;
++                }
++                break;
++        }
++    }
++}
++
++static void stbir__buffer_loop_upsample(stbir__info* stbir_info)
++{
++    int y;
++    float scale_ratio = stbir_info->vertical_scale;
++    float out_scanlines_radius = stbir__filter_info_table[stbir_info->vertical_filter].support(1/scale_ratio) * scale_ratio;
++
++    STBIR_ASSERT(stbir__use_height_upsampling(stbir_info));
++
++    for (y = 0; y < stbir_info->output_h; y++)
++    {
++        float in_center_of_out = 0; // Center of the current out scanline in the in scanline space
++        int in_first_scanline = 0, in_last_scanline = 0;
++
++        stbir__calculate_sample_range_upsample(y, out_scanlines_radius, scale_ratio, stbir_info->vertical_shift, &in_first_scanline, &in_last_scanline, &in_center_of_out);
++
++        STBIR_ASSERT(in_last_scanline - in_first_scanline + 1 <= stbir_info->ring_buffer_num_entries);
++
++        if (stbir_info->ring_buffer_begin_index >= 0)
++        {
++            // Get rid of whatever we don't need anymore.
++            while (in_first_scanline > stbir_info->ring_buffer_first_scanline)
++            {
++                if (stbir_info->ring_buffer_first_scanline == stbir_info->ring_buffer_last_scanline)
++                {
++                    // We just popped the last scanline off the ring buffer.
++                    // Reset it to the empty state.
++                    stbir_info->ring_buffer_begin_index = -1;
++                    stbir_info->ring_buffer_first_scanline = 0;
++                    stbir_info->ring_buffer_last_scanline = 0;
++                    break;
++                }
++                else
++                {
++                    stbir_info->ring_buffer_first_scanline++;
++                    stbir_info->ring_buffer_begin_index = (stbir_info->ring_buffer_begin_index + 1) % stbir_info->ring_buffer_num_entries;
++                }
++            }
++        }
++
++        // Load in new ones.
++        if (stbir_info->ring_buffer_begin_index < 0)
++            stbir__decode_and_resample_upsample(stbir_info, in_first_scanline);
++
++        while (in_last_scanline > stbir_info->ring_buffer_last_scanline)
++            stbir__decode_and_resample_upsample(stbir_info, stbir_info->ring_buffer_last_scanline + 1);
++
++        // Now all buffers should be ready to write a row of vertical sampling.
++        stbir__resample_vertical_upsample(stbir_info, y);
++
++        STBIR_PROGRESS_REPORT((float)y / stbir_info->output_h);
++    }
++}
++
++static void stbir__empty_ring_buffer(stbir__info* stbir_info, int first_necessary_scanline)
++{
++    int output_stride_bytes = stbir_info->output_stride_bytes;
++    int channels = stbir_info->channels;
++    int alpha_channel = stbir_info->alpha_channel;
++    int type = stbir_info->type;
++    int colorspace = stbir_info->colorspace;
++    int output_w = stbir_info->output_w;
++    void* output_data = stbir_info->output_data;
++    int decode = STBIR__DECODE(type, colorspace);
++
++    float* ring_buffer = stbir_info->ring_buffer;
++    int ring_buffer_length = stbir_info->ring_buffer_length_bytes/sizeof(float);
++
++    if (stbir_info->ring_buffer_begin_index >= 0)
++    {
++        // Get rid of whatever we don't need anymore.
++        while (first_necessary_scanline > stbir_info->ring_buffer_first_scanline)
++        {
++            if (stbir_info->ring_buffer_first_scanline >= 0 && stbir_info->ring_buffer_first_scanline < stbir_info->output_h)
++            {
++                int output_row_start = stbir_info->ring_buffer_first_scanline * output_stride_bytes;
++                float* ring_buffer_entry = stbir__get_ring_buffer_entry(ring_buffer, stbir_info->ring_buffer_begin_index, ring_buffer_length);
++                stbir__encode_scanline(stbir_info, output_w, (char *) output_data + output_row_start, ring_buffer_entry, channels, alpha_channel, decode);
++                STBIR_PROGRESS_REPORT((float)stbir_info->ring_buffer_first_scanline / stbir_info->output_h);
++            }
++
++            if (stbir_info->ring_buffer_first_scanline == stbir_info->ring_buffer_last_scanline)
++            {
++                // We just popped the last scanline off the ring buffer.
++                // Reset it to the empty state.
++                stbir_info->ring_buffer_begin_index = -1;
++                stbir_info->ring_buffer_first_scanline = 0;
++                stbir_info->ring_buffer_last_scanline = 0;
++                break;
++            }
++            else
++            {
++                stbir_info->ring_buffer_first_scanline++;
++                stbir_info->ring_buffer_begin_index = (stbir_info->ring_buffer_begin_index + 1) % stbir_info->ring_buffer_num_entries;
++            }
++        }
++    }
++}
++
++static void stbir__buffer_loop_downsample(stbir__info* stbir_info)
++{
++    int y;
++    float scale_ratio = stbir_info->vertical_scale;
++    int output_h = stbir_info->output_h;
++    float in_pixels_radius = stbir__filter_info_table[stbir_info->vertical_filter].support(scale_ratio) / scale_ratio;
++    int pixel_margin = stbir_info->vertical_filter_pixel_margin;
++    int max_y = stbir_info->input_h + pixel_margin;
++
++    STBIR_ASSERT(!stbir__use_height_upsampling(stbir_info));
++
++    for (y = -pixel_margin; y < max_y; y++)
++    {
++        float out_center_of_in; // Center of the current out scanline in the in scanline space
++        int out_first_scanline, out_last_scanline;
++
++        stbir__calculate_sample_range_downsample(y, in_pixels_radius, scale_ratio, stbir_info->vertical_shift, &out_first_scanline, &out_last_scanline, &out_center_of_in);
++
++        STBIR_ASSERT(out_last_scanline - out_first_scanline + 1 <= stbir_info->ring_buffer_num_entries);
++
++        if (out_last_scanline < 0 || out_first_scanline >= output_h)
++            continue;
++
++        stbir__empty_ring_buffer(stbir_info, out_first_scanline);
++
++        stbir__decode_and_resample_downsample(stbir_info, y);
++
++        // Load in new ones.
++        if (stbir_info->ring_buffer_begin_index < 0)
++            stbir__add_empty_ring_buffer_entry(stbir_info, out_first_scanline);
++
++        while (out_last_scanline > stbir_info->ring_buffer_last_scanline)
++            stbir__add_empty_ring_buffer_entry(stbir_info, stbir_info->ring_buffer_last_scanline + 1);
++
++        // Now the horizontal buffer is ready to write to all ring buffer rows.
++        stbir__resample_vertical_downsample(stbir_info, y);
++    }
++
++    stbir__empty_ring_buffer(stbir_info, stbir_info->output_h);
++}
++
++static void stbir__setup(stbir__info *info, int input_w, int input_h, int output_w, int output_h, int channels)
++{
++    info->input_w = input_w;
++    info->input_h = input_h;
++    info->output_w = output_w;
++    info->output_h = output_h;
++    info->channels = channels;
++}
++
++static void stbir__calculate_transform(stbir__info *info, float s0, float t0, float s1, float t1, float *transform)
++{
++    info->s0 = s0;
++    info->t0 = t0;
++    info->s1 = s1;
++    info->t1 = t1;
++
++    if (transform)
++    {
++        info->horizontal_scale = transform[0];
++        info->vertical_scale   = transform[1];
++        info->horizontal_shift = transform[2];
++        info->vertical_shift   = transform[3];
++    }
++    else
++    {
++        info->horizontal_scale = ((float)info->output_w / info->input_w) / (s1 - s0);
++        info->vertical_scale = ((float)info->output_h / info->input_h) / (t1 - t0);
++
++        info->horizontal_shift = s0 * info->output_w / (s1 - s0);
++        info->vertical_shift = t0 * info->output_h / (t1 - t0);
++    }
++}
++
++static void stbir__choose_filter(stbir__info *info, stbir_filter h_filter, stbir_filter v_filter)
++{
++    if (h_filter == 0)
++        h_filter = stbir__use_upsampling(info->horizontal_scale) ? STBIR_DEFAULT_FILTER_UPSAMPLE : STBIR_DEFAULT_FILTER_DOWNSAMPLE;
++    if (v_filter == 0)
++        v_filter = stbir__use_upsampling(info->vertical_scale)   ? STBIR_DEFAULT_FILTER_UPSAMPLE : STBIR_DEFAULT_FILTER_DOWNSAMPLE;
++    info->horizontal_filter = h_filter;
++    info->vertical_filter = v_filter;
++}
++
++static stbir_uint32 stbir__calculate_memory(stbir__info *info)
++{
++    int pixel_margin = stbir__get_filter_pixel_margin(info->horizontal_filter, info->horizontal_scale);
++    int filter_height = stbir__get_filter_pixel_width(info->vertical_filter, info->vertical_scale);
++
++    info->horizontal_num_contributors = stbir__get_contributors(info->horizontal_scale, info->horizontal_filter, info->input_w, info->output_w);
++    info->vertical_num_contributors   = stbir__get_contributors(info->vertical_scale  , info->vertical_filter  , info->input_h, info->output_h);
++
++    // One extra entry because floating point precision problems sometimes cause an extra to be necessary.
++    info->ring_buffer_num_entries = filter_height + 1;
++
++    info->horizontal_contributors_size = info->horizontal_num_contributors * sizeof(stbir__contributors);
++    info->horizontal_coefficients_size = stbir__get_total_horizontal_coefficients(info) * sizeof(float);
++    info->vertical_contributors_size = info->vertical_num_contributors * sizeof(stbir__contributors);
++    info->vertical_coefficients_size = stbir__get_total_vertical_coefficients(info) * sizeof(float);
++    info->decode_buffer_size = (info->input_w + pixel_margin * 2) * info->channels * sizeof(float);
++    info->horizontal_buffer_size = info->output_w * info->channels * sizeof(float);
++    info->ring_buffer_size = info->output_w * info->channels * info->ring_buffer_num_entries * sizeof(float);
++    info->encode_buffer_size = info->output_w * info->channels * sizeof(float);
++
++    STBIR_ASSERT(info->horizontal_filter != 0);
++    STBIR_ASSERT(info->horizontal_filter < STBIR__ARRAY_SIZE(stbir__filter_info_table)); // this now happens too late
++    STBIR_ASSERT(info->vertical_filter != 0);
++    STBIR_ASSERT(info->vertical_filter < STBIR__ARRAY_SIZE(stbir__filter_info_table)); // this now happens too late
++
++    if (stbir__use_height_upsampling(info))
++        // The horizontal buffer is for when we're downsampling the height and we
++        // can't output the result of sampling the decode buffer directly into the
++        // ring buffers.
++        info->horizontal_buffer_size = 0;
++    else
++        // The encode buffer is to retain precision in the height upsampling method
++        // and isn't used when height downsampling.
++        info->encode_buffer_size = 0;
++
++    return info->horizontal_contributors_size + info->horizontal_coefficients_size
++        + info->vertical_contributors_size + info->vertical_coefficients_size
++        + info->decode_buffer_size + info->horizontal_buffer_size
++        + info->ring_buffer_size + info->encode_buffer_size;
++}
++
++static int stbir__resize_allocated(stbir__info *info,
++    const void* input_data, int input_stride_in_bytes,
++    void* output_data, int output_stride_in_bytes,
++    int alpha_channel, stbir_uint32 flags, stbir_datatype type,
++    stbir_edge edge_horizontal, stbir_edge edge_vertical, stbir_colorspace colorspace,
++    void* tempmem, size_t tempmem_size_in_bytes)
++{
++    size_t memory_required = stbir__calculate_memory(info);
++
++    int width_stride_input = input_stride_in_bytes ? input_stride_in_bytes : info->channels * info->input_w * stbir__type_size[type];
++    int width_stride_output = output_stride_in_bytes ? output_stride_in_bytes : info->channels * info->output_w * stbir__type_size[type];
++
++#ifdef STBIR_DEBUG_OVERWRITE_TEST
++#define OVERWRITE_ARRAY_SIZE 8
++    unsigned char overwrite_output_before_pre[OVERWRITE_ARRAY_SIZE];
++    unsigned char overwrite_tempmem_before_pre[OVERWRITE_ARRAY_SIZE];
++    unsigned char overwrite_output_after_pre[OVERWRITE_ARRAY_SIZE];
++    unsigned char overwrite_tempmem_after_pre[OVERWRITE_ARRAY_SIZE];
++
++    size_t begin_forbidden = width_stride_output * (info->output_h - 1) + info->output_w * info->channels * stbir__type_size[type];
++    memcpy(overwrite_output_before_pre, &((unsigned char*)output_data)[-OVERWRITE_ARRAY_SIZE], OVERWRITE_ARRAY_SIZE);
++    memcpy(overwrite_output_after_pre, &((unsigned char*)output_data)[begin_forbidden], OVERWRITE_ARRAY_SIZE);
++    memcpy(overwrite_tempmem_before_pre, &((unsigned char*)tempmem)[-OVERWRITE_ARRAY_SIZE], OVERWRITE_ARRAY_SIZE);
++    memcpy(overwrite_tempmem_after_pre, &((unsigned char*)tempmem)[tempmem_size_in_bytes], OVERWRITE_ARRAY_SIZE);
++#endif
++
++    STBIR_ASSERT(info->channels >= 0);
++    STBIR_ASSERT(info->channels <= STBIR_MAX_CHANNELS);
++
++    if (info->channels < 0 || info->channels > STBIR_MAX_CHANNELS)
++        return 0;
++
++    STBIR_ASSERT(info->horizontal_filter < STBIR__ARRAY_SIZE(stbir__filter_info_table));
++    STBIR_ASSERT(info->vertical_filter < STBIR__ARRAY_SIZE(stbir__filter_info_table));
++
++    if (info->horizontal_filter >= STBIR__ARRAY_SIZE(stbir__filter_info_table))
++        return 0;
++    if (info->vertical_filter >= STBIR__ARRAY_SIZE(stbir__filter_info_table))
++        return 0;
++
++    if (alpha_channel < 0)
++        flags |= STBIR_FLAG_ALPHA_USES_COLORSPACE | STBIR_FLAG_ALPHA_PREMULTIPLIED;
++
++    if (!(flags&STBIR_FLAG_ALPHA_USES_COLORSPACE) || !(flags&STBIR_FLAG_ALPHA_PREMULTIPLIED)) {
++        STBIR_ASSERT(alpha_channel >= 0 && alpha_channel < info->channels);
++    }
++
++    if (alpha_channel >= info->channels)
++        return 0;
++
++    STBIR_ASSERT(tempmem);
++
++    if (!tempmem)
++        return 0;
++
++    STBIR_ASSERT(tempmem_size_in_bytes >= memory_required);
++
++    if (tempmem_size_in_bytes < memory_required)
++        return 0;
++
++    memset(tempmem, 0, tempmem_size_in_bytes);
++
++    info->input_data = input_data;
++    info->input_stride_bytes = width_stride_input;
++
++    info->output_data = output_data;
++    info->output_stride_bytes = width_stride_output;
++
++    info->alpha_channel = alpha_channel;
++    info->flags = flags;
++    info->type = type;
++    info->edge_horizontal = edge_horizontal;
++    info->edge_vertical = edge_vertical;
++    info->colorspace = colorspace;
++
++    info->horizontal_coefficient_width   = stbir__get_coefficient_width  (info->horizontal_filter, info->horizontal_scale);
++    info->vertical_coefficient_width     = stbir__get_coefficient_width  (info->vertical_filter  , info->vertical_scale  );
++    info->horizontal_filter_pixel_width  = stbir__get_filter_pixel_width (info->horizontal_filter, info->horizontal_scale);
++    info->vertical_filter_pixel_width    = stbir__get_filter_pixel_width (info->vertical_filter  , info->vertical_scale  );
++    info->horizontal_filter_pixel_margin = stbir__get_filter_pixel_margin(info->horizontal_filter, info->horizontal_scale);
++    info->vertical_filter_pixel_margin   = stbir__get_filter_pixel_margin(info->vertical_filter  , info->vertical_scale  );
++
++    info->ring_buffer_length_bytes = info->output_w * info->channels * sizeof(float);
++    info->decode_buffer_pixels = info->input_w + info->horizontal_filter_pixel_margin * 2;
++
++#define STBIR__NEXT_MEMPTR(current, newtype) (newtype*)(((unsigned char*)current) + current##_size)
++
++    info->horizontal_contributors = (stbir__contributors *) tempmem;
++    info->horizontal_coefficients = STBIR__NEXT_MEMPTR(info->horizontal_contributors, float);
++    info->vertical_contributors = STBIR__NEXT_MEMPTR(info->horizontal_coefficients, stbir__contributors);
++    info->vertical_coefficients = STBIR__NEXT_MEMPTR(info->vertical_contributors, float);
++    info->decode_buffer = STBIR__NEXT_MEMPTR(info->vertical_coefficients, float);
++
++    if (stbir__use_height_upsampling(info))
++    {
++        info->horizontal_buffer = NULL;
++        info->ring_buffer = STBIR__NEXT_MEMPTR(info->decode_buffer, float);
++        info->encode_buffer = STBIR__NEXT_MEMPTR(info->ring_buffer, float);
++
++        STBIR_ASSERT((size_t)STBIR__NEXT_MEMPTR(info->encode_buffer, unsigned char) == (size_t)tempmem + tempmem_size_in_bytes);
++    }
++    else
++    {
++        info->horizontal_buffer = STBIR__NEXT_MEMPTR(info->decode_buffer, float);
++        info->ring_buffer = STBIR__NEXT_MEMPTR(info->horizontal_buffer, float);
++        info->encode_buffer = NULL;
++
++        STBIR_ASSERT((size_t)STBIR__NEXT_MEMPTR(info->ring_buffer, unsigned char) == (size_t)tempmem + tempmem_size_in_bytes);
++    }
++
++#undef STBIR__NEXT_MEMPTR
++
++    // This signals that the ring buffer is empty
++    info->ring_buffer_begin_index = -1;
++
++    stbir__calculate_filters(info->horizontal_contributors, info->horizontal_coefficients, info->horizontal_filter, info->horizontal_scale, info->horizontal_shift, info->input_w, info->output_w);
++    stbir__calculate_filters(info->vertical_contributors, info->vertical_coefficients, info->vertical_filter, info->vertical_scale, info->vertical_shift, info->input_h, info->output_h);
++
++    STBIR_PROGRESS_REPORT(0);
++
++    if (stbir__use_height_upsampling(info))
++        stbir__buffer_loop_upsample(info);
++    else
++        stbir__buffer_loop_downsample(info);
++
++    STBIR_PROGRESS_REPORT(1);
++
++#ifdef STBIR_DEBUG_OVERWRITE_TEST
++    STBIR_ASSERT(memcmp(overwrite_output_before_pre, &((unsigned char*)output_data)[-OVERWRITE_ARRAY_SIZE], OVERWRITE_ARRAY_SIZE) == 0);
++    STBIR_ASSERT(memcmp(overwrite_output_after_pre, &((unsigned char*)output_data)[begin_forbidden], OVERWRITE_ARRAY_SIZE) == 0);
++    STBIR_ASSERT(memcmp(overwrite_tempmem_before_pre, &((unsigned char*)tempmem)[-OVERWRITE_ARRAY_SIZE], OVERWRITE_ARRAY_SIZE) == 0);
++    STBIR_ASSERT(memcmp(overwrite_tempmem_after_pre, &((unsigned char*)tempmem)[tempmem_size_in_bytes], OVERWRITE_ARRAY_SIZE) == 0);
++#endif
++
++    return 1;
++}
++
++
++static int stbir__resize_arbitrary(
++    void *alloc_context,
++    const void* input_data, int input_w, int input_h, int input_stride_in_bytes,
++    void* output_data, int output_w, int output_h, int output_stride_in_bytes,
++    float s0, float t0, float s1, float t1, float *transform,
++    int channels, int alpha_channel, stbir_uint32 flags, stbir_datatype type,
++    stbir_filter h_filter, stbir_filter v_filter,
++    stbir_edge edge_horizontal, stbir_edge edge_vertical, stbir_colorspace colorspace)
++{
++    stbir__info info;
++    int result;
++    size_t memory_required;
++    void* extra_memory;
++
++    stbir__setup(&info, input_w, input_h, output_w, output_h, channels);
++    stbir__calculate_transform(&info, s0,t0,s1,t1,transform);
++    stbir__choose_filter(&info, h_filter, v_filter);
++    memory_required = stbir__calculate_memory(&info);
++    extra_memory = STBIR_MALLOC(memory_required, alloc_context);
++
++    if (!extra_memory)
++        return 0;
++
++    result = stbir__resize_allocated(&info, input_data, input_stride_in_bytes,
++                                            output_data, output_stride_in_bytes, 
++                                            alpha_channel, flags, type,
++                                            edge_horizontal, edge_vertical,
++                                            colorspace, extra_memory, memory_required);
++
++    STBIR_FREE(extra_memory, alloc_context);
++
++    return result;
++}
++
++STBIRDEF int stbir_resize_uint8(     const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                           unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                     int num_channels)
++{
++    return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        0,0,1,1,NULL,num_channels,-1,0, STBIR_TYPE_UINT8, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
++        STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR);
++}
++
++STBIRDEF int stbir_resize_float(     const float *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                           float *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                     int num_channels)
++{
++    return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        0,0,1,1,NULL,num_channels,-1,0, STBIR_TYPE_FLOAT, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
++        STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR);
++}
++
++STBIRDEF int stbir_resize_uint8_srgb(const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                           unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                     int num_channels, int alpha_channel, int flags)
++{
++    return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT8, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
++        STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
++}
++
++STBIRDEF int stbir_resize_uint8_srgb_edgemode(const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                                    unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                              int num_channels, int alpha_channel, int flags,
++                                              stbir_edge edge_wrap_mode)
++{
++    return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT8, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
++        edge_wrap_mode, edge_wrap_mode, STBIR_COLORSPACE_SRGB);
++}
++
++STBIRDEF int stbir_resize_uint8_generic( const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                               unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                         int num_channels, int alpha_channel, int flags,
++                                         stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space, 
++                                         void *alloc_context)
++{
++    return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT8, filter, filter,
++        edge_wrap_mode, edge_wrap_mode, space);
++}
++
++STBIRDEF int stbir_resize_uint16_generic(const stbir_uint16 *input_pixels  , int input_w , int input_h , int input_stride_in_bytes,
++                                               stbir_uint16 *output_pixels , int output_w, int output_h, int output_stride_in_bytes,
++                                         int num_channels, int alpha_channel, int flags,
++                                         stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space, 
++                                         void *alloc_context)
++{
++    return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT16, filter, filter,
++        edge_wrap_mode, edge_wrap_mode, space);
++}
++
++
++STBIRDEF int stbir_resize_float_generic( const float *input_pixels         , int input_w , int input_h , int input_stride_in_bytes,
++                                               float *output_pixels        , int output_w, int output_h, int output_stride_in_bytes,
++                                         int num_channels, int alpha_channel, int flags,
++                                         stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space, 
++                                         void *alloc_context)
++{
++    return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_FLOAT, filter, filter,
++        edge_wrap_mode, edge_wrap_mode, space);
++}
++
++
++STBIRDEF int stbir_resize(         const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                         void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                   stbir_datatype datatype,
++                                   int num_channels, int alpha_channel, int flags,
++                                   stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical, 
++                                   stbir_filter filter_horizontal,  stbir_filter filter_vertical,
++                                   stbir_colorspace space, void *alloc_context)
++{
++    return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        0,0,1,1,NULL,num_channels,alpha_channel,flags, datatype, filter_horizontal, filter_vertical,
++        edge_mode_horizontal, edge_mode_vertical, space);
++}
++
++
++STBIRDEF int stbir_resize_subpixel(const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                         void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                   stbir_datatype datatype,
++                                   int num_channels, int alpha_channel, int flags,
++                                   stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical, 
++                                   stbir_filter filter_horizontal,  stbir_filter filter_vertical,
++                                   stbir_colorspace space, void *alloc_context,
++                                   float x_scale, float y_scale,
++                                   float x_offset, float y_offset)
++{
++    float transform[4];
++    transform[0] = x_scale;
++    transform[1] = y_scale;
++    transform[2] = x_offset;
++    transform[3] = y_offset;
++    return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        0,0,1,1,transform,num_channels,alpha_channel,flags, datatype, filter_horizontal, filter_vertical,
++        edge_mode_horizontal, edge_mode_vertical, space);
++}
++
++STBIRDEF int stbir_resize_region(  const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++                                         void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++                                   stbir_datatype datatype,
++                                   int num_channels, int alpha_channel, int flags,
++                                   stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical, 
++                                   stbir_filter filter_horizontal,  stbir_filter filter_vertical,
++                                   stbir_colorspace space, void *alloc_context,
++                                   float s0, float t0, float s1, float t1)
++{
++    return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++        output_pixels, output_w, output_h, output_stride_in_bytes,
++        s0,t0,s1,t1,NULL,num_channels,alpha_channel,flags, datatype, filter_horizontal, filter_vertical,
++        edge_mode_horizontal, edge_mode_vertical, space);
++}
++
++#endif // STB_IMAGE_RESIZE_IMPLEMENTATION
++
++/*
++------------------------------------------------------------------------------
++This software is available under 2 licenses -- choose whichever you prefer.
++------------------------------------------------------------------------------
++ALTERNATIVE A - MIT License
++Copyright (c) 2017 Sean Barrett
++Permission is hereby granted, free of charge, to any person obtaining a copy of 
++this software and associated documentation files (the "Software"), to deal in 
++the Software without restriction, including without limitation the rights to 
++use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 
++of the Software, and to permit persons to whom the Software is furnished to do 
++so, subject to the following conditions:
++The above copyright notice and this permission notice shall be included in all 
++copies or substantial portions of the Software.
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
++AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
++LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
++OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
++SOFTWARE.
++------------------------------------------------------------------------------
++ALTERNATIVE B - Public Domain (www.unlicense.org)
++This is free and unencumbered software released into the public domain.
++Anyone is free to copy, modify, publish, use, compile, sell, or distribute this 
++software, either in source code form or as a compiled binary, for any purpose, 
++commercial or non-commercial, and by any means.
++In jurisdictions that recognize copyright laws, the author or authors of this 
++software dedicate any and all copyright interest in the software to the public 
++domain. We make this dedication for the benefit of the public at large and to 
++the detriment of our heirs and successors. We intend this dedication to be an 
++overt act of relinquishment in perpetuity of all present and future rights to 
++this software under copyright law.
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
++AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 
++ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
++WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
++------------------------------------------------------------------------------
++*/
+diff --git a/src/euphoria/CMakeLists.txt b/src/euphoria/CMakeLists.txt
+index a092bc2..d3f55ee 100644
+--- a/src/euphoria/CMakeLists.txt
++++ b/src/euphoria/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.euphoria)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/feedback/CMakeLists.txt b/src/feedback/CMakeLists.txt
+index 1ffb833..b37c430 100644
+--- a/src/feedback/CMakeLists.txt
++++ b/src/feedback/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.feedback)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/fieldlines/CMakeLists.txt b/src/fieldlines/CMakeLists.txt
+index 4a69333..de60dda 100644
+--- a/src/fieldlines/CMakeLists.txt
++++ b/src/fieldlines/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.fieldlines)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/flocks/CMakeLists.txt b/src/flocks/CMakeLists.txt
+index b3a5305..c2b4a79 100644
+--- a/src/flocks/CMakeLists.txt
++++ b/src/flocks/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.flocks)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/flux/CMakeLists.txt b/src/flux/CMakeLists.txt
+index b3f08ab..a2de0b2 100644
+--- a/src/flux/CMakeLists.txt
++++ b/src/flux/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.flux)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/helios/CMakeLists.txt b/src/helios/CMakeLists.txt
+index 5286c8b..d64a619 100644
+--- a/src/helios/CMakeLists.txt
++++ b/src/helios/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.helios)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/hufosmoke/CMakeLists.txt b/src/hufosmoke/CMakeLists.txt
+index bac1e3a..44d1323 100644
+--- a/src/hufosmoke/CMakeLists.txt
++++ b/src/hufosmoke/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.hufosmoke)
+ 
+-cmake_minimum_required(VERSION 3.3)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/hufotunnel/CMakeLists.txt b/src/hufotunnel/CMakeLists.txt
+index 3074360..af5ed2c 100644
+--- a/src/hufotunnel/CMakeLists.txt
++++ b/src/hufotunnel/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.hufotunnel)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/hyperspace/CMakeLists.txt b/src/hyperspace/CMakeLists.txt
+index f3e19d8..6bd303e 100644
+--- a/src/hyperspace/CMakeLists.txt
++++ b/src/hyperspace/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.hyperspace)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/lattice/CMakeLists.txt b/src/lattice/CMakeLists.txt
+index 11586a1..ef884e4 100644
+--- a/src/lattice/CMakeLists.txt
++++ b/src/lattice/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.lattice)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/lorenz/CMakeLists.txt b/src/lorenz/CMakeLists.txt
+index 11816dc..ab3026f 100644
+--- a/src/lorenz/CMakeLists.txt
++++ b/src/lorenz/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.lorenz)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/matrixview/CMakeLists.txt b/src/matrixview/CMakeLists.txt
+index 1ce4ca8..d98a8f1 100644
+--- a/src/matrixview/CMakeLists.txt
++++ b/src/matrixview/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.matrixview)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/microcosm/CMakeLists.txt b/src/microcosm/CMakeLists.txt
+index 75e0dba..d05b639 100644
+--- a/src/microcosm/CMakeLists.txt
++++ b/src/microcosm/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.microcosm)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/plasma/CMakeLists.txt b/src/plasma/CMakeLists.txt
+index 153ef44..e7fc795 100644
+--- a/src/plasma/CMakeLists.txt
++++ b/src/plasma/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.plasma)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/skyrocket/CMakeLists.txt b/src/skyrocket/CMakeLists.txt
+index 3d2b497..8a89f28 100644
+--- a/src/skyrocket/CMakeLists.txt
++++ b/src/skyrocket/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.skyrocket)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/solarwinds/CMakeLists.txt b/src/solarwinds/CMakeLists.txt
+index f13c736..f1ef41c 100644
+--- a/src/solarwinds/CMakeLists.txt
++++ b/src/solarwinds/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.solarwinds)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/spirographx/CMakeLists.txt b/src/spirographx/CMakeLists.txt
+index 32f281c..2ccb751 100644
+--- a/src/spirographx/CMakeLists.txt
++++ b/src/spirographx/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.spirographx)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+diff --git a/src/sundancer2/CMakeLists.txt b/src/sundancer2/CMakeLists.txt
+index a9d6470..a0e47a6 100644
+--- a/src/sundancer2/CMakeLists.txt
++++ b/src/sundancer2/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.sundancer2)
+ 
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+ 
+
+From ed08432af0af17096ed03d57ed9688c79e84dbe4 Mon Sep 17 00:00:00 2001
+From: Alwin Esch <alwin.esch@web.de>
+Date: Tue, 19 Mar 2019 18:35:29 +0100
+Subject: [PATCH 3/3] update Jenkinsfile to handle multiple addons in one
+
+---
+ Jenkinsfile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Jenkinsfile b/Jenkinsfile
+index 43a94b4..e44c5f8 100644
+--- a/Jenkinsfile
++++ b/Jenkinsfile
+@@ -1 +1 @@
+-buildPlugin(platforms: ['android-armv7', 'android-aarch64', 'ios-armv7', 'ios-aarch64', 'osx-x86_64', 'ubuntu-ppa'])
++buildPlugin(archive: 'screensaver.rsxs.*', platforms: ['android-armv7', 'android-aarch64', 'ios-armv7', 'ios-aarch64', 'osx-x86_64', 'ubuntu-ppa'])
diff --git a/package/kodi-screensaver-rsxs/0002-fix-default-include-dir.patch b/package/kodi-screensaver-rsxs/0002-fix-default-include-dir.patch
deleted file mode 100644
index a7e7c74b0f..0000000000
--- a/package/kodi-screensaver-rsxs/0002-fix-default-include-dir.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-Fix X include path to prevent error during configure
-
-Downloaded from
-https://github.com/LibreELEC/LibreELEC.tv/blob/master/packages/mediacenter/kodi-binary-addons/screensavers.rsxs/patches/screensavers.rsxs-0002-fix-default-include-dir.patch
-
-Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
-
-diff -Naur screensavers.rsxs-3241d29.orig/CMakeLists.txt screensavers.rsxs-3241d29/CMakeLists.txt
---- screensavers.rsxs-3241d29.orig/CMakeLists.txt	2015-10-22 23:59:38.187280475 -0700
-+++ screensavers.rsxs-3241d29/CMakeLists.txt	2015-10-23 00:00:27.228113829 -0700
-@@ -17,7 +17,7 @@
- include_directories(${OpenGL_INCLUDE_DIR}
-                     ${PNG_INCLUDE_DIR}
-                     ${KODI_INCLUDE_DIR}
--                    ${X_INCLUDE_DIRS}
-+                    ${X_INCLUDE_DIR}
-                     ${CMAKE_BINARY_DIR}/rsxs-prefix/src/rsxs-build
-                     ${PROJECT_SOURCE_DIR}/${rsxs_dir}/src
-                     ${PROJECT_SOURCE_DIR}/${rsxs_dir}/lib
-@@ -67,7 +67,7 @@
-                                       --disable-skyrocket
-                                       --disable-solarwinds
-                                       --disable-sound
--                                      --x-includes=${X_INCLUDE_DIRS}
-+                                      --x-includes=${X_INCLUDE_DIR}
-                                       --x-libraries=${X_LIBRARIES}
-                                       ${PNG_PATH}
-                                       ${EXTRA_FLAGS}
diff --git a/package/kodi-screensaver-rsxs/Config.in b/package/kodi-screensaver-rsxs/Config.in
index c523ce5a1c..60723af016 100644
--- a/package/kodi-screensaver-rsxs/Config.in
+++ b/package/kodi-screensaver-rsxs/Config.in
@@ -2,12 +2,14 @@ config BR2_PACKAGE_KODI_SCREENSAVER_RSXS
 	bool "kodi-screensaver-rsxs"
 	depends on BR2_PACKAGE_HAS_LIBGL # libglu
 	depends on BR2_PACKAGE_XORG7 # xlib_libXmu
-	select BR2_PACKAGE_LIBPNG
+	select BR2_PACKAGE_BZIP2
+	select BR2_PACKAGE_GLI
+	select BR2_PACKAGE_GLM
 	select BR2_PACKAGE_XLIB_LIBXMU
 	help
 	  RSXS screensaver add-ons for Kodi
 
-	  https://github.com/notspiff/screensavers.rsxs
+	  https://github.com/xbmc/screensavers.rsxs
 
 comment "kodi-screensaver-rsxs depends on X.org and needs OpenGL"
 	depends on !BR2_PACKAGE_XORG7 || !BR2_PACKAGE_HAS_LIBGL
diff --git a/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.hash b/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.hash
index e80c972ebb..b2d9e33a57 100644
--- a/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.hash
+++ b/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.hash
@@ -1,2 +1,2 @@
 # Locally computed
-sha256 8436c29d2f42bc65ff6f1abc2f1d05a613cc2ebb16d793e02b1f2bee296952a6  kodi-screensaver-rsxs-1.3.0.tar.gz
+sha256 22ff3f0ca9679c59ce1a90b98d918dd10a8012b789729b2e44c04d4ce8c86ad8  kodi-screensaver-rsxs-7cb648507440d87948dec10d5bfdab3b722d37fe.tar.gz
diff --git a/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.mk b/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.mk
index 64ffb4fba6..7f9bc4d52d 100644
--- a/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.mk
+++ b/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.mk
@@ -4,10 +4,9 @@
 #
 ################################################################################
 
-KODI_SCREENSAVER_RSXS_VERSION = 1.3.0
-KODI_SCREENSAVER_RSXS_SITE = $(call github,notspiff,screensavers.rsxs,v$(KODI_SCREENSAVER_RSXS_VERSION))
+KODI_SCREENSAVER_RSXS_VERSION = 7cb648507440d87948dec10d5bfdab3b722d37fe
+KODI_SCREENSAVER_RSXS_SITE = $(call github,xbmc,screensavers.rsxs,$(KODI_SCREENSAVER_RSXS_VERSION))
 KODI_SCREENSAVER_RSXS_LICENSE = GPL-3.0
-KODI_SCREENSAVER_RSXS_LICENSE_FILES = lib/rsxs-1.0/COPYING
-KODI_SCREENSAVER_RSXS_DEPENDENCIES = kodi libpng xlib_libXmu
+KODI_SCREENSAVER_RSXS_DEPENDENCIES = bzip2 gli glm kodi xlib_libXmu
 
 $(eval $(cmake-package))
