b/package/libpng/libpng-1.5.9-apng.patch
new file mode 100644
@@ -0,0 +1,1641 @@
+diff -Naru libpng-1.5.9.org/png.h libpng-1.5.9/png.h
+--- libpng-1.5.9.org/png.h 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/png.h 2012-02-19 17:29:25.000000000 +0900
+@@ -432,6 +432,10 @@
+ # include "pnglibconf.h"
+ #endif
+
++#define PNG_APNG_SUPPORTED
++#define PNG_READ_APNG_SUPPORTED
++#define PNG_WRITE_APNG_SUPPORTED
++
+ #ifndef PNG_VERSION_INFO_ONLY
+ # ifndef PNG_BUILDING_SYMBOL_TABLE
+ /*
+@@ -822,6 +826,10 @@
+ #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */
+ #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */
+ #define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */
++#ifdef PNG_APNG_SUPPORTED
++#define PNG_INFO_acTL 0x10000L
++#define PNG_INFO_fcTL 0x20000L
++#endif
+
+ /* This is used for the transformation routines, as some of them
+ * change these values for the row. It also should enable using
+@@ -880,6 +888,10 @@
+ */
+ typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp,
png_bytep,
+ png_uint_32, int));
++#ifdef PNG_APNG_SUPPORTED
++typedef PNG_CALLBACK(void, *png_progressive_frame_ptr, (png_structp,
++ png_uint_32));
++#endif
+ #endif
+
+ #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
+@@ -1550,6 +1562,18 @@
+ PNG_EXPORT(60, void, png_write_image,
+ (png_structp png_ptr, png_bytepp image));
+
++#ifdef PNG_WRITE_APNG_SUPPORTED
++PNG_EXPORT(1001, void, png_write_frame_head, (png_structp png_ptr,
++ png_infop png_info, png_bytepp row_pointers,
++ png_uint_32 width, png_uint_32 height,
++ png_uint_32 x_offset, png_uint_32 y_offset,
++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
++ png_byte blend_op));
++
++PNG_EXPORT(1002, void,png_write_frame_tail, (png_structp png_ptr,
++ png_infop png_info));
++#endif
++
+ /* Write the end of the PNG file. */
+ PNG_EXPORT(61, void, png_write_end,
+ (png_structp png_ptr, png_infop info_ptr));
+@@ -1834,6 +1858,11 @@
+ PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr,
+ png_voidp progressive_ptr, png_progressive_info_ptr info_fn,
+ png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn));
++#ifdef PNG_READ_APNG_SUPPORTED
++PNG_EXPORT(1003, void, png_set_progressive_frame_fn, (png_structp png_ptr,
++ png_progressive_frame_ptr frame_info_fn,
++ png_progressive_frame_ptr frame_end_fn));
++#endif
+
+ /* Returns the user pointer associated with the push read functions */
+ PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp
png_ptr));
+@@ -2333,6 +2362,62 @@
+ int unit, png_const_charp swidth, png_const_charp sheight));
+ #endif /* PNG_sCAL_SUPPORTED */
+
++#ifdef PNG_APNG_SUPPORTED
++PNG_EXPORT(1004, png_uint_32, png_get_acTL, (png_structp png_ptr,
++ png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays));
++PNG_EXPORT(1005, png_uint_32, png_set_acTL, (png_structp png_ptr,
++ png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays));
++PNG_EXPORT(1006, png_uint_32, png_get_num_frames, (png_structp png_ptr,
++ png_infop info_ptr));
++PNG_EXPORT(1007, png_uint_32, png_get_num_plays, (png_structp png_ptr,
++ png_infop info_ptr));
++
++PNG_EXPORT(1008, png_uint_32, png_get_next_frame_fcTL,
++ (png_structp png_ptr, png_infop info_ptr, png_uint_32 *width,
++ png_uint_32 *height, png_uint_32 *x_offset, png_uint_32 *y_offset,
++ png_uint_16 *delay_num, png_uint_16 *delay_den, png_byte *dispose_op,
++ png_byte *blend_op));
++PNG_EXPORT(1009, png_uint_32, png_set_next_frame_fcTL,
++ (png_structp png_ptr, png_infop info_ptr, png_uint_32 width,
++ png_uint_32 height, png_uint_32 x_offset, png_uint_32 y_offset,
++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
++ png_byte blend_op));
++PNG_EXPORT(1010, png_uint_32, png_get_next_frame_width,
++ (png_structp png_ptr, png_infop info_ptr));
++PNG_EXPORT(1011, png_uint_32, png_get_next_frame_height,
++ (png_structp png_ptr, png_infop info_ptr));
++PNG_EXPORT(1012, png_uint_32, png_get_next_frame_x_offset,
++ (png_structp png_ptr, png_infop info_ptr));
++PNG_EXPORT(1013, png_uint_32, png_get_next_frame_y_offset,
++ (png_structp png_ptr, png_infop info_ptr));
++PNG_EXPORT(1014, png_uint_16, png_get_next_frame_delay_num,
++ (png_structp png_ptr, png_infop info_ptr));
++PNG_EXPORT(1015, png_uint_16, png_get_next_frame_delay_den,
++ (png_structp png_ptr, png_infop info_ptr));
++PNG_EXPORT(1016, png_byte, png_get_next_frame_dispose_op,
++ (png_structp png_ptr, png_infop info_ptr));
++PNG_EXPORT(1017, png_byte, png_get_next_frame_blend_op,
++ (png_structp png_ptr, png_infop info_ptr));
++PNG_EXPORT(1018, png_byte, png_get_first_frame_is_hidden,
++ (png_structp png_ptr, png_infop info_ptr));
++PNG_EXPORT(1019, png_uint_32, png_set_first_frame_is_hidden,
++ (png_structp png_ptr, png_infop info_ptr, png_byte is_hidden));
++
++/* dispose_op flags from inside fcTL */
++#define PNG_DISPOSE_OP_NONE 0x00
++#define PNG_DISPOSE_OP_BACKGROUND 0x01
++#define PNG_DISPOSE_OP_PREVIOUS 0x02
++
++/* blend_op flags from inside fcTL */
++#define PNG_BLEND_OP_SOURCE 0x00
++#define PNG_BLEND_OP_OVER 0x01
++#endif /* PNG_APNG_SUPPORTED */
++
++#ifdef PNG_READ_APNG_SUPPORTED
++PNG_EXPORT(1020, void,png_read_frame_head, (png_structp png_ptr,
++ png_infop info_ptr));
++#endif
++
+ #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ /* Provide a list of chunks and how they are to be handled, if the
built-in
+ handling or default unknown chunk handling is not desired. Any
chunks not
+diff -Naru libpng-1.5.9.org/pngget.c libpng-1.5.9/pngget.c
+--- libpng-1.5.9.org/pngget.c 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngget.c 2012-02-19 17:29:25.000000000 +0900
+@@ -1032,6 +1032,167 @@
+ }
+ #endif
+
++#ifdef PNG_APNG_SUPPORTED
++png_uint_32 PNGAPI
++png_get_acTL(png_structp png_ptr, png_infop info_ptr,
++ png_uint_32 *num_frames, png_uint_32 *num_plays)
++{
++ png_debug1(1, "in %s retrieval function", "acTL");
++
++ if (png_ptr != NULL && info_ptr != NULL &&
++ (info_ptr->valid & PNG_INFO_acTL) &&
++ num_frames != NULL && num_plays != NULL)
++ {
++ *num_frames = info_ptr->num_frames;
++ *num_plays = info_ptr->num_plays;
++ return (1);
++ }
++
++ return (0);
++}
++
++png_uint_32 PNGAPI
++png_get_num_frames(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_num_frames()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->num_frames);
++ return (0);
++}
++
++png_uint_32 PNGAPI
++png_get_num_plays(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_num_plays()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->num_plays);
++ return (0);
++}
++
++png_uint_32 PNGAPI
++png_get_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
++ png_uint_32 *width, png_uint_32 *height,
++ png_uint_32 *x_offset, png_uint_32 *y_offset,
++ png_uint_16 *delay_num, png_uint_16 *delay_den,
++ png_byte *dispose_op, png_byte *blend_op)
++{
++ png_debug1(1, "in %s retrieval function", "fcTL");
++
++ if (png_ptr != NULL && info_ptr != NULL &&
++ (info_ptr->valid & PNG_INFO_fcTL) &&
++ width != NULL && height != NULL &&
++ x_offset != NULL && x_offset != NULL &&
++ delay_num != NULL && delay_den != NULL &&
++ dispose_op != NULL && blend_op != NULL)
++ {
++ *width = info_ptr->next_frame_width;
++ *height = info_ptr->next_frame_height;
++ *x_offset = info_ptr->next_frame_x_offset;
++ *y_offset = info_ptr->next_frame_y_offset;
++ *delay_num = info_ptr->next_frame_delay_num;
++ *delay_den = info_ptr->next_frame_delay_den;
++ *dispose_op = info_ptr->next_frame_dispose_op;
++ *blend_op = info_ptr->next_frame_blend_op;
++ return (1);
++ }
++
++ return (0);
++}
++
++png_uint_32 PNGAPI
++png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_next_frame_width()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->next_frame_width);
++ return (0);
++}
++
++png_uint_32 PNGAPI
++png_get_next_frame_height(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_next_frame_height()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->next_frame_height);
++ return (0);
++}
++
++png_uint_32 PNGAPI
++png_get_next_frame_x_offset(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_next_frame_x_offset()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->next_frame_x_offset);
++ return (0);
++}
++
++png_uint_32 PNGAPI
++png_get_next_frame_y_offset(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_next_frame_y_offset()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->next_frame_y_offset);
++ return (0);
++}
++
++png_uint_16 PNGAPI
++png_get_next_frame_delay_num(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_next_frame_delay_num()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->next_frame_delay_num);
++ return (0);
++}
++
++png_uint_16 PNGAPI
++png_get_next_frame_delay_den(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_next_frame_delay_den()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->next_frame_delay_den);
++ return (0);
++}
++
++png_byte PNGAPI
++png_get_next_frame_dispose_op(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_next_frame_dispose_op()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->next_frame_dispose_op);
++ return (0);
++}
++
++png_byte PNGAPI
++png_get_next_frame_blend_op(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_get_next_frame_blend_op()");
++
++ if (png_ptr != NULL && info_ptr != NULL)
++ return (info_ptr->next_frame_blend_op);
++ return (0);
++}
++
++png_byte PNGAPI
++png_get_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_first_frame_is_hidden()");
++
++ if (png_ptr != NULL)
++ return (png_byte)(png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN);
++
++ return 0;
++}
++#endif /* PNG_APNG_SUPPORTED */
++
+ #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+ int PNGAPI
+ png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop
info_ptr,
+diff -Naru libpng-1.5.9.org/pnginfo.h libpng-1.5.9/pnginfo.h
+--- libpng-1.5.9.org/pnginfo.h 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pnginfo.h 2012-02-19 17:29:25.000000000 +0900
+@@ -265,5 +265,18 @@
+ png_bytepp row_pointers; /* the image bits */
+ #endif
+
++#ifdef PNG_APNG_SUPPORTED
++ png_uint_32 num_frames; /* including default image */
++ png_uint_32 num_plays;
++ png_uint_32 next_frame_width;
++ png_uint_32 next_frame_height;
++ png_uint_32 next_frame_x_offset;
++ png_uint_32 next_frame_y_offset;
++ png_uint_16 next_frame_delay_num;
++ png_uint_16 next_frame_delay_den;
++ png_byte next_frame_dispose_op;
++ png_byte next_frame_blend_op;
++#endif
++
+ };
+ #endif /* PNGINFO_H */
+diff -Naru libpng-1.5.9.org/pngpread.c libpng-1.5.9/pngpread.c
+--- libpng-1.5.9.org/pngpread.c 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngpread.c 2012-02-19 17:29:25.000000000 +0900
+@@ -235,9 +235,106 @@
+ png_check_chunk_name(png_ptr, png_ptr->chunk_name);
+ png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
+ }
+-
++
+ chunk_name = png_ptr->chunk_name;
+
++#ifdef PNG_READ_APNG_SUPPORTED
++ if (png_ptr->num_frames_read > 0 &&
++ png_ptr->num_frames_read < info_ptr->num_frames)
++ {
++ if (chunk_name == png_IDAT)
++ {
++ /* Discard trailing IDATs for the first frame */
++ if (png_ptr->mode & PNG_HAVE_fcTL || png_ptr->num_frames_read
> 1)
++ png_error(png_ptr, "out of place IDAT");
++
++ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
++ {
++ png_push_save_buffer(png_ptr);
++ return;
++ }
++ png_push_crc_skip(png_ptr, png_ptr->push_length);
++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
++ return;
++ }
++ else if (chunk_name == png_fdAT)
++ {
++ if (png_ptr->buffer_size < 4)
++ {
++ png_push_save_buffer(png_ptr);
++ return;
++ }
++ png_ensure_sequence_number(png_ptr, 4);
++
++ if (!(png_ptr->mode & PNG_HAVE_fcTL))
++ {
++ /* Discard trailing fdATs for frames other than the first */
++ if (png_ptr->num_frames_read < 2)
++ png_error(png_ptr, "out of place fdAT");
++
++ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
++ {
++ png_push_save_buffer(png_ptr);
++ return;
++ }
++ png_push_crc_skip(png_ptr, png_ptr->push_length);
++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
++ return;
++ }
++ else
++ {
++ /* frame data follows */
++ png_ptr->idat_size = png_ptr->push_length - 4;
++ png_ptr->mode |= PNG_HAVE_IDAT;
++ png_ptr->process_mode = PNG_READ_IDAT_MODE;
++
++ return;
++ }
++ }
++ else if(chunk_name == png_fcTL)
++ {
++ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
++ {
++ png_push_save_buffer(png_ptr);
++ return;
++ }
++
++ png_read_reset(png_ptr);
++ png_ptr->mode &= ~PNG_HAVE_fcTL;
++
++ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
++
++ if (!(png_ptr->mode & PNG_HAVE_fcTL))
++ png_error(png_ptr, "missing required fcTL chunk");
++
++ png_read_reinit(png_ptr, info_ptr);
++ png_progressive_read_reset(png_ptr);
++
++ if (png_ptr->frame_info_fn != NULL)
++ (*(png_ptr->frame_info_fn))(png_ptr,
png_ptr->num_frames_read);
++
++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
++
++ return;
++ }
++ else
++ {
++ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
++ {
++ png_push_save_buffer(png_ptr);
++ return;
++ }
++ png_warning(png_ptr, "Skipped (ignored) a chunk "
++ "between APNG chunks");
++ png_push_crc_skip(png_ptr, png_ptr->push_length);
++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
++ return;
++ }
++
++ return;
++ }
++#endif /* PNG_READ_APNG_SUPPORTED */
++
+ if (chunk_name == png_IDAT)
+ {
+ /* This is here above the if/else case statement below because
if the
+@@ -341,6 +438,9 @@
+ png_benign_error(png_ptr, "Too many IDATs found");
+ }
+
++#ifdef PNG_READ_APNG_SUPPORTED
++ png_have_info(png_ptr, info_ptr);
++#endif
+ png_ptr->idat_size = png_ptr->push_length;
+ png_ptr->mode |= PNG_HAVE_IDAT;
+ png_ptr->process_mode = PNG_READ_IDAT_MODE;
+@@ -573,6 +673,38 @@
+ }
+
+ #endif
++#ifdef PNG_READ_APNG_SUPPORTED
++ else if (chunk_name == png_acTL)
++ {
++ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
++ {
++ png_push_save_buffer(png_ptr);
++ return;
++ }
++
++ png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length);
++ }
++ else if (chunk_name == png_fcTL)
++ {
++ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
++ {
++ png_push_save_buffer(png_ptr);
++ return;
++ }
++
++ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
++ }
++ else if (chunk_name == png_fdAT)
++ {
++ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
++ {
++ png_push_save_buffer(png_ptr);
++ return;
++ }
++
++ png_handle_fdAT(png_ptr, info_ptr, png_ptr->push_length);
++ }
++#endif /* PNG_READ_APNG_SUPPORTED */
+ else
+ {
+ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+@@ -772,7 +904,7 @@
+ png_byte chunk_tag[4];
+
+ /* TODO: this code can be commoned up with the same code in
push_read */
+- if (png_ptr->buffer_size < 8)
++ if (png_ptr->buffer_size < 12)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+@@ -785,17 +917,64 @@
+ png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag);
+ png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
+
+- if (png_ptr->chunk_name != png_IDAT)
++#ifdef PNG_READ_APNG_SUPPORTED
++ if ((png_ptr->chunk_name != png_fdAT)
++ && png_ptr->num_frames_read > 0)
++ {
++ if (png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)
++ {
++ png_ptr->process_mode = PNG_READ_CHUNK_MODE;
++ if (png_ptr->frame_end_fn != NULL)
++ (*(png_ptr->frame_end_fn))(png_ptr,
png_ptr->num_frames_read);
++ png_ptr->num_frames_read++;
++ return;
++ }
++ else
++ {
++ if (png_ptr->chunk_name == png_IEND)
++ png_error(png_ptr, "Not enough image data");
++ if (png_ptr->push_length + 4 > png_ptr->buffer_size)
++ {
++ png_push_save_buffer(png_ptr);
++ return;
++ }
++ png_warning(png_ptr, "Skipping (ignoring) a chunk between "
++ "APNG chunks");
++ png_crc_finish(png_ptr, png_ptr->push_length);
++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
++ return;
++ }
++ }
++ else
++#endif
++ if ((png_ptr->chunk_name != png_IDAT)
++#ifdef PNG_READ_APNG_SUPPORTED
++ && (png_ptr->num_frames_read == 0)
++#endif
++ )
+ {
+ png_ptr->process_mode = PNG_READ_CHUNK_MODE;
+
+ if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
+ png_error(png_ptr, "Not enough compressed data");
+
++#ifdef PNG_READ_APNG_SUPPORTED
++ if (png_ptr->frame_end_fn != NULL)
++ (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read);
++ png_ptr->num_frames_read++;
++#endif
+ return;
+ }
+
+ png_ptr->idat_size = png_ptr->push_length;
++
++#ifdef PNG_READ_APNG_SUPPORTED
++ if (png_ptr->num_frames_read > 0)
++ {
++ png_ensure_sequence_number(png_ptr, 4);
++ png_ptr->idat_size -= 4;
++ }
++#endif
+ }
+
+ if (png_ptr->idat_size && png_ptr->save_buffer_size)
+@@ -1832,6 +2011,17 @@
+ png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer);
+ }
+
++#ifdef PNG_READ_APNG_SUPPORTED
++void PNGAPI
++png_set_progressive_frame_fn(png_structp png_ptr,
++ png_progressive_frame_ptr frame_info_fn,
++ png_progressive_frame_ptr frame_end_fn)
++{
++ png_ptr->frame_info_fn = frame_info_fn;
++ png_ptr->frame_end_fn = frame_end_fn;
++}
++#endif
++
+ png_voidp PNGAPI
+ png_get_progressive_ptr(png_const_structp png_ptr)
+ {
+diff -Naru libpng-1.5.9.org/pngpriv.h libpng-1.5.9/pngpriv.h
+--- libpng-1.5.9.org/pngpriv.h 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngpriv.h 2012-02-19 17:29:25.000000000 +0900
+@@ -426,6 +426,10 @@
+ #define PNG_BACKGROUND_IS_GRAY 0x800
+ #define PNG_HAVE_PNG_SIGNATURE 0x1000
+ #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after
IDAT */
++#ifdef PNG_APNG_SUPPORTED
++#define PNG_HAVE_acTL 0x4000
++#define PNG_HAVE_fcTL 0x8000L
++#endif
+
+ /* Flags for the transformations the PNG library does on the image data */
+ #define PNG_BGR 0x0001
+@@ -620,6 +624,14 @@
+ #define png_tIME PNG_CHUNK(116, 73, 77, 69)
+ #define png_tRNS PNG_CHUNK(116, 82, 78, 83)
+ #define png_zTXt PNG_CHUNK(122, 84, 88, 116)
++#ifdef PNG_APNG_SUPPORTED
++#define png_acTL PNG_CHUNK( 97, 99, 84, 76)
++#define png_fcTL PNG_CHUNK(102, 99, 84, 76)
++#define png_fdAT PNG_CHUNK(102, 100, 65, 84)
++
++/* For png_struct.apng_flags: */
++#define PNG_FIRST_FRAME_HIDDEN 0x0001
++#endif
+
+ /* The following will work on (signed char*) strings, whereas the
get_uint_32
+ * macro will fail on top-bit-set values because of the sign extension.
+@@ -895,6 +907,17 @@
+ int unit, png_const_charp width, png_const_charp height));
+ #endif
+
++#ifdef PNG_WRITE_APNG_SUPPORTED
++PNG_EXTERN void png_write_acTL PNGARG((png_structp png_ptr,
++ png_uint_32 num_frames, png_uint_32 num_plays));
++
++PNG_EXTERN void png_write_fcTL PNGARG((png_structp png_ptr,
++ png_uint_32 width, png_uint_32 height,
++ png_uint_32 x_offset, png_uint_32 y_offset,
++ png_uint_16 delay_num, png_uint_16 delay_den,
++ png_byte dispose_op, png_byte blend_op));
++#endif
++
+ /* Called when finished processing a row of data */
+ PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr));
+
+@@ -986,6 +1009,20 @@
+ png_infop info_ptr));
+ #endif
+
++#ifdef PNG_READ_APNG_SUPPORTED
++/* Private, reset some things to become ready for reading next frame */
++PNG_EXTERN void png_read_reset PNGARG((png_structp png_ptr));
++PNG_EXTERN void png_read_reinit PNGARG((png_structp png_ptr,
++ png_infop info_ptr));
++PNG_EXTERN void png_progressive_read_reset PNGARG((png_structp png_ptr));
++#endif
++#ifdef PNG_WRITE_APNG_SUPPORTED
++/* Private, reset some things to become ready for writing next frame */
++PNG_EXTERN void png_write_reset PNGARG((png_structp png_ptr));
++PNG_EXTERN void png_write_reinit PNGARG((png_structp png_ptr,
++ png_infop info_ptr, png_uint_32 width, png_uint_32 height));
++#endif
++
+ /* These are the functions that do the transformations */
+ #ifdef PNG_READ_FILLER_SUPPORTED
+ PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info,
+@@ -1218,6 +1255,23 @@
+ png_uint_32 length));
+ #endif
+
++#ifdef PNG_READ_APNG_SUPPORTED
++PNG_EXTERN void png_handle_acTL PNGARG((png_structp png_ptr, png_infop
info_ptr,
++ png_uint_32 length));
++PNG_EXTERN void png_handle_fcTL PNGARG((png_structp png_ptr, png_infop
info_ptr,
++ png_uint_32 length));
++PNG_EXTERN void png_have_info PNGARG((png_structp png_ptr, png_infop
info_ptr));
++PNG_EXTERN void png_handle_fdAT PNGARG((png_structp png_ptr, png_infop
info_ptr,
++ png_uint_32 length));
++PNG_EXTERN void png_ensure_sequence_number PNGARG((png_structp png_ptr,
++ png_uint_32 length));
++PNG_EXTERN void png_ensure_fcTL_is_valid PNGARG((png_structp png_ptr,
++ png_uint_32 width, png_uint_32 height,
++ png_uint_32 x_offset, png_uint_32 y_offset,
++ png_uint_16 delay_num, png_uint_16 delay_den,
++ png_byte dispose_op, png_byte blend_op));
++#endif
++
+ #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_uint_32 length));
+diff -Naru libpng-1.5.9.org/pngread.c libpng-1.5.9/pngread.c
+--- libpng-1.5.9.org/pngread.c 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngread.c 2012-02-19 17:29:25.000000000 +0900
+@@ -244,6 +244,9 @@
+ !(png_ptr->mode & PNG_HAVE_PLTE))
+ png_error(png_ptr, "Missing PLTE before IDAT");
+
++#ifdef PNG_READ_APNG_SUPPORTED
++ png_have_info(png_ptr, info_ptr);
++#endif
+ png_ptr->idat_size = length;
+ png_ptr->mode |= PNG_HAVE_IDAT;
+ break;
+@@ -334,12 +337,95 @@
+ png_handle_iTXt(png_ptr, info_ptr, length);
+ #endif
+
++#ifdef PNG_READ_APNG_SUPPORTED
++ else if (chunk_name == png_acTL)
++ png_handle_acTL(png_ptr, info_ptr, length);
++ else if (chunk_name == png_fcTL)
++ png_handle_fcTL(png_ptr, info_ptr, length);
++ else if (chunk_name == png_fdAT)
++ png_handle_fdAT(png_ptr, info_ptr, length);
++#endif
++
+ else
+ png_handle_unknown(png_ptr, info_ptr, length);
+ }
+ }
+ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+
++#ifdef PNG_READ_APNG_SUPPORTED
++void PNGAPI
++png_read_frame_head(png_structp png_ptr, png_infop info_ptr)
++{
++ png_byte have_chunk_after_DAT; /* after IDAT or after fdAT */
++
++ png_debug(0, "Reading frame head");
++
++ if (!(png_ptr->mode & PNG_HAVE_acTL))
++ png_error(png_ptr, "attempt to png_read_frame_head() but "
++ "no acTL present");
++
++ /* do nothing for the main IDAT */
++ if (png_ptr->num_frames_read == 0)
++ return;
++
++ png_crc_finish(png_ptr, 0); /* CRC from last IDAT or fdAT chunk */
++
++ png_read_reset(png_ptr);
++ png_ptr->mode &= ~PNG_HAVE_fcTL;
++
++ have_chunk_after_DAT = 0;
++ for (;;)
++ {
++ png_byte chunk_length[4];
++ png_byte chunk_tag[4];
++ png_uint_32 length;
++
++ png_read_data(png_ptr, chunk_length, 4);
++ length = png_get_uint_31(png_ptr, chunk_length);
++
++ png_reset_crc(png_ptr);
++ png_crc_read(png_ptr, chunk_tag, 4);
++ png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag);
++
++ if (png_ptr->chunk_name == png_IDAT)
++ {
++ /* discard trailing IDATs for the first frame */
++ if (have_chunk_after_DAT || png_ptr->num_frames_read > 1)
++ png_error(png_ptr, "png_read_frame_head(): out of
place IDAT");
++ png_crc_finish(png_ptr, length);
++ }
++ else if (png_ptr->chunk_name == png_fcTL)
++ {
++ png_handle_fcTL(png_ptr, info_ptr, length);
++ have_chunk_after_DAT = 1;
++ }
++ else if (png_ptr->chunk_name == png_fdAT)
++ {
++ png_ensure_sequence_number(png_ptr, length);
++
++ /* discard trailing fdATs for frames other than the first */
++ if (!have_chunk_after_DAT && png_ptr->num_frames_read > 1)
++ png_crc_finish(png_ptr, length - 4);
++ else if(png_ptr->mode & PNG_HAVE_fcTL)
++ {
++ png_ptr->idat_size = length - 4;
++ png_ptr->mode |= PNG_HAVE_IDAT;
++
++ break;
++ }
++ else
++ png_error(png_ptr, "png_read_frame_head(): out of
place fdAT");
++ }
++ else
++ {
++ png_warning(png_ptr, "Skipped (ignored) a chunk "
++ "between APNG chunks");
++ png_crc_finish(png_ptr, length);
++ }
++ }
++}
++#endif /* PNG_READ_APNG_SUPPORTED */
++
+ /* Optional call to update the users info_ptr structure */
+ void PNGAPI
+ png_read_update_info(png_structp png_ptr, png_infop info_ptr)
+@@ -541,13 +627,39 @@
+ {
+ if (!(png_ptr->zstream.avail_in))
+ {
+- while (!png_ptr->idat_size)
++ png_uint_32 bytes_to_skip = 0;
++
++ while (!png_ptr->idat_size || bytes_to_skip != 0)
+ {
+- png_crc_finish(png_ptr, 0);
++ png_crc_finish(png_ptr, bytes_to_skip);
++ bytes_to_skip = 0;
+
+ png_ptr->idat_size = png_read_chunk_header(png_ptr);
+- if (png_ptr->chunk_name != png_IDAT)
+- png_error(png_ptr, "Not enough image data");
++#ifdef PNG_READ_APNG_SUPPORTED
++ if (png_ptr->num_frames_read == 0)
++ {
++#endif
++ if (png_ptr->chunk_name != png_IDAT)
++ png_error(png_ptr, "Not enough image data");
++#ifdef PNG_READ_APNG_SUPPORTED
++ }
++ else
++ {
++ if (png_ptr->chunk_name == png_IEND)
++ png_error(png_ptr, "Not enough image data");
++ if (png_ptr->chunk_name != png_fdAT)
++ {
++ png_warning(png_ptr, "Skipped (ignored) a chunk "
++ "between APNG chunks");
++ bytes_to_skip = png_ptr->idat_size;
++ continue;
++ }
++
++ png_ensure_sequence_number(png_ptr, png_ptr->idat_size);
++
++ png_ptr->idat_size -= 4;
++ }
++#endif
+ }
+ png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.next_in = png_ptr->zbuf;
+@@ -567,6 +679,9 @@
+ png_benign_error(png_ptr, "Extra compressed data");
+ png_ptr->mode |= PNG_AFTER_IDAT;
+ png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
++#ifdef PNG_READ_APNG_SUPPORTED
++ png_ptr->num_frames_read++;
++#endif
+ break;
+ }
+
+@@ -929,6 +1044,15 @@
+ png_handle_iTXt(png_ptr, info_ptr, length);
+ #endif
+
++#ifdef PNG_READ_APNG_SUPPORTED
++ else if (chunk_name == png_acTL)
++ png_handle_acTL(png_ptr, info_ptr, length);
++ else if (chunk_name == png_fcTL)
++ png_handle_fcTL(png_ptr, info_ptr, length);
++ else if (chunk_name == png_fdAT)
++ png_handle_fdAT(png_ptr, info_ptr, length);
++#endif
++
+ else
+ png_handle_unknown(png_ptr, info_ptr, length);
+ } while (!(png_ptr->mode & PNG_HAVE_IEND));
+diff -Naru libpng-1.5.9.org/pngrutil.c libpng-1.5.9/pngrutil.c
+--- libpng-1.5.9.org/pngrutil.c 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngrutil.c 2012-02-19 17:29:25.000000000 +0900
+@@ -549,6 +549,11 @@
+ filter_type = buf[11];
+ interlace_type = buf[12];
+
++#ifdef PNG_READ_APNG_SUPPORTED
++ png_ptr->first_frame_width = width;
++ png_ptr->first_frame_height = height;
++#endif
++
+ /* Set internal variables */
+ png_ptr->width = width;
+ png_ptr->height = height;
+@@ -2613,6 +2618,172 @@
+ }
+ #endif
+
++#ifdef PNG_READ_APNG_SUPPORTED
++void /* PRIVATE */
++png_handle_acTL(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
++{
++ png_byte data[8];
++ png_uint_32 num_frames;
++ png_uint_32 num_plays;
++ png_uint_32 didSet;
++
++ png_debug(1, "in png_handle_acTL");
++
++ if (!(png_ptr->mode & PNG_HAVE_IHDR))
++ {
++ png_error(png_ptr, "Missing IHDR before acTL");
++ }
++ else if (png_ptr->mode & PNG_HAVE_IDAT)
++ {
++ png_warning(png_ptr, "Invalid acTL after IDAT skipped");
++ png_crc_finish(png_ptr, length);
++ return;
++ }
++ else if (png_ptr->mode & PNG_HAVE_acTL)
++ {
++ png_warning(png_ptr, "Duplicate acTL skipped");
++ png_crc_finish(png_ptr, length);
++ return;
++ }
++ else if (length != 8)
++ {
++ png_warning(png_ptr, "acTL with invalid length skipped");
++ png_crc_finish(png_ptr, length);
++ return;
++ }
++
++ png_crc_read(png_ptr, data, 8);
++ png_crc_finish(png_ptr, 0);
++
++ num_frames = png_get_uint_31(png_ptr, data);
++ num_plays = png_get_uint_31(png_ptr, data + 4);
++
++ /* the set function will do error checking on num_frames */
++ didSet = png_set_acTL(png_ptr, info_ptr, num_frames, num_plays);
++ if(didSet)
++ png_ptr->mode |= PNG_HAVE_acTL;
++}
++
++void /* PRIVATE */
++png_handle_fcTL(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
++{
++ png_byte data[22];
++ png_uint_32 width;
++ png_uint_32 height;
++ png_uint_32 x_offset;
++ png_uint_32 y_offset;
++ png_uint_16 delay_num;
++ png_uint_16 delay_den;
++ png_byte dispose_op;
++ png_byte blend_op;
++
++ png_debug(1, "in png_handle_fcTL");
++
++ png_ensure_sequence_number(png_ptr, length);
++
++ if (!(png_ptr->mode & PNG_HAVE_IHDR))
++ {
++ png_error(png_ptr, "Missing IHDR before fcTL");
++ }
++ else if (png_ptr->mode & PNG_HAVE_IDAT)
++ {
++ /* for any frames other then the first this message may be
misleading,
++ * but correct. PNG_HAVE_IDAT is unset before the frame head is
read
++ * i can't think of a better message */
++ png_warning(png_ptr, "Invalid fcTL after IDAT skipped");
++ png_crc_finish(png_ptr, length-4);
++ return;
++ }
++ else if (png_ptr->mode & PNG_HAVE_fcTL)
++ {
++ png_warning(png_ptr, "Duplicate fcTL within one frame skipped");
++ png_crc_finish(png_ptr, length-4);
++ return;
++ }
++ else if (length != 26)
++ {
++ png_warning(png_ptr, "fcTL with invalid length skipped");
++ png_crc_finish(png_ptr, length-4);
++ return;
++ }
++
++ png_crc_read(png_ptr, data, 22);
++ png_crc_finish(png_ptr, 0);
++
++ width = png_get_uint_31(png_ptr, data);
++ height = png_get_uint_31(png_ptr, data + 4);
++ x_offset = png_get_uint_31(png_ptr, data + 8);
++ y_offset = png_get_uint_31(png_ptr, data + 12);
++ delay_num = png_get_uint_16(data + 16);
++ delay_den = png_get_uint_16(data + 18);
++ dispose_op = data[20];
++ blend_op = data[21];
++
++ if (png_ptr->num_frames_read == 0 && (x_offset != 0 || y_offset != 0))
++ png_error(png_ptr, "fcTL for the first frame must have zero
offset");
++
++ if (info_ptr != NULL)
++ {
++ if (png_ptr->num_frames_read == 0 &&
++ (width != info_ptr->width || height != info_ptr->height))
++ png_error(png_ptr, "size in first frame's fcTL must match "
++ "the size in IHDR");
++
++ /* the set function will do more error checking */
++ png_set_next_frame_fcTL(png_ptr, info_ptr, width, height,
++ x_offset, y_offset, delay_num, delay_den,
++ dispose_op, blend_op);
++
++ png_read_reinit(png_ptr, info_ptr);
++ }
++
++ png_ptr->mode |= PNG_HAVE_fcTL;
++}
++
++void /* PRIVATE */
++png_have_info(png_structp png_ptr, png_infop info_ptr)
++{
++ if((info_ptr->valid & PNG_INFO_acTL) && !(info_ptr->valid &
PNG_INFO_fcTL))
++ {
++ png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
++ info_ptr->num_frames++;
++ }
++}
++
++void /* PRIVATE */
++png_handle_fdAT(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
++{
++ png_ensure_sequence_number(png_ptr, length);
++
++ /* This function is only called from png_read_end(), png_read_info(),
++ * and png_push_read_chunk() which means that:
++ * - the user doesn't want to read this frame
++ * - or this is an out-of-place fdAT
++ * in either case it is safe to ignore the chunk with a warning */
++ png_warning(png_ptr, "ignoring fdAT chunk");
++ png_crc_finish(png_ptr, length - 4);
++}
++
++void /* PRIVATE */
++png_ensure_sequence_number(png_structp png_ptr, png_uint_32 length)
++{
++ png_byte data[4];
++ png_uint_32 sequence_number;
++
++ if (length < 4)
++ png_error(png_ptr, "invalid fcTL or fdAT chunk found");
++
++ png_crc_read(png_ptr, data, 4);
++ sequence_number = png_get_uint_31(png_ptr, data);
++
++ if (sequence_number != png_ptr->next_seq_num)
++ png_error(png_ptr, "fcTL or fdAT chunk with out-of-order
sequence "
++ "number found");
++
++ png_ptr->next_seq_num++;
++}
++#endif /* PNG_READ_APNG_SUPPORTED */
++
+ /* This function is called when we haven't found a handler for a
+ * chunk. If there isn't a problem with the chunk itself (ie bad
+ * chunk name, CRC, or a critical chunk), the chunk is silently ignored
+@@ -4155,4 +4326,76 @@
+
+ png_ptr->flags |= PNG_FLAG_ROW_INIT;
+ }
++
++#ifdef PNG_READ_APNG_SUPPORTED
++/* This function is to be called after the main IDAT set has been read and
++ * before a new IDAT is read. It resets some parts of png_ptr
++ * to make them usable by the read functions again */
++void /* PRIVATE */
++png_read_reset(png_structp png_ptr)
++{
++ png_ptr->mode &= ~PNG_HAVE_IDAT;
++ png_ptr->mode &= ~PNG_AFTER_IDAT;
++ png_ptr->row_number = 0;
++ png_ptr->pass = 0;
++ png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
++}
++
++void /* PRIVATE */
++png_read_reinit(png_structp png_ptr, png_infop info_ptr)
++{
++ png_ptr->width = info_ptr->next_frame_width;
++ png_ptr->height = info_ptr->next_frame_height;
++ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->width);
++ png_ptr->info_rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,
++ png_ptr->width);
++ if (png_ptr->prev_row)
++ png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
++}
++
++/* same as png_read_reset() but for the progressive reader */
++void /* PRIVATE */
++png_progressive_read_reset(png_structp png_ptr)
++{
++ /* start of interlace block */
++ const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
++
++ /* offset to next interlace block */
++ const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
++
++ /* start of interlace block in the y direction */
++ const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
++
++ /* offset to next interlace block in the y direction */
++ const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
++
++ if (png_ptr->interlaced)
++ {
++ if (!(png_ptr->transformations & PNG_INTERLACE))
++ png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
++ png_pass_ystart[0]) / png_pass_yinc[0];
++ else
++ png_ptr->num_rows = png_ptr->height;
++
++ png_ptr->iwidth = (png_ptr->width +
++ png_pass_inc[png_ptr->pass] - 1 -
++ png_pass_start[png_ptr->pass]) /
++ png_pass_inc[png_ptr->pass];
++ }
++ else
++ {
++ png_ptr->num_rows = png_ptr->height;
++ png_ptr->iwidth = png_ptr->width;
++ }
++
++ png_ptr->flags &= ~PNG_FLAG_ZLIB_FINISHED;
++ if (inflateReset(&(png_ptr->zstream)) != Z_OK)
++ png_error(png_ptr, "inflateReset failed");
++ png_ptr->zstream.avail_in = 0;
++ png_ptr->zstream.next_in = 0;
++ png_ptr->zstream.next_out = png_ptr->row_buf;
++ png_ptr->zstream.avail_out = (uInt)PNG_ROWBYTES(png_ptr->pixel_depth,
++ png_ptr->iwidth) + 1;
++}
++#endif /* PNG_READ_APNG_SUPPORTED */
+ #endif /* PNG_READ_SUPPORTED */
+diff -Naru libpng-1.5.9.org/pngset.c libpng-1.5.9/pngset.c
+--- libpng-1.5.9.org/pngset.c 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngset.c 2012-02-19 17:29:25.000000000 +0900
+@@ -262,6 +262,11 @@
+ info_ptr->rowbytes = 0;
+ else
+ info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
++
++#ifdef PNG_APNG_SUPPORTED
++ /* for non-animated png. this may be overritten from an acTL chunk
later */
++ info_ptr->num_frames = 1;
++#endif
+ }
+
+ #ifdef PNG_oFFs_SUPPORTED
+@@ -1013,6 +1018,143 @@
+ }
+ #endif /* PNG_sPLT_SUPPORTED */
+
++#ifdef PNG_APNG_SUPPORTED
++png_uint_32 PNGAPI
++png_set_acTL(png_structp png_ptr, png_infop info_ptr,
++ png_uint_32 num_frames, png_uint_32 num_plays)
++{
++ png_debug1(1, "in %s storage function", "acTL");
++
++ if (png_ptr == NULL || info_ptr == NULL)
++ {
++ png_warning(png_ptr,
++ "Call to png_set_acTL() with NULL png_ptr "
++ "or info_ptr ignored");
++ return (0);
++ }
++ if (num_frames == 0)
++ {
++ png_warning(png_ptr,
++ "Ignoring attempt to set acTL with num_frames zero");
++ return (0);
++ }
++ if (num_frames > PNG_UINT_31_MAX)
++ {
++ png_warning(png_ptr,
++ "Ignoring attempt to set acTL with num_frames >
2^31-1");
++ return (0);
++ }
++ if (num_plays > PNG_UINT_31_MAX)
++ {
++ png_warning(png_ptr,
++ "Ignoring attempt to set acTL with num_plays "
++ "> 2^31-1");
++ return (0);
++ }
++
++ info_ptr->num_frames = num_frames;
++ info_ptr->num_plays = num_plays;
++
++ info_ptr->valid |= PNG_INFO_acTL;
++
++ return (1);
++}
++
++/* delay_num and delay_den can hold any 16-bit values including zero */
++png_uint_32 PNGAPI
++png_set_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
++ png_uint_32 width, png_uint_32 height,
++ png_uint_32 x_offset, png_uint_32 y_offset,
++ png_uint_16 delay_num, png_uint_16 delay_den,
++ png_byte dispose_op, png_byte blend_op)
++{
++ png_debug1(1, "in %s storage function", "fcTL");
++
++ if (png_ptr == NULL || info_ptr == NULL)
++ {
++ png_warning(png_ptr,
++ "Call to png_set_fcTL() with NULL png_ptr or
info_ptr "
++ "ignored");
++ return (0);
++ }
++
++ png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset,
++ delay_num, delay_den, dispose_op, blend_op);
++
++ if (blend_op == PNG_BLEND_OP_OVER)
++ {
++ if (!(png_ptr->color_type & PNG_COLOR_MASK_ALPHA) &&
++ !(png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
++ {
++ png_warning(png_ptr,
++ "PNG_BLEND_OP_OVER is meaningless and wasteful "
++ "for opaque images, ignored");
++ blend_op = PNG_BLEND_OP_SOURCE;
++ }
++ }
++
++ info_ptr->next_frame_width = width;
++ info_ptr->next_frame_height = height;
++ info_ptr->next_frame_x_offset = x_offset;
++ info_ptr->next_frame_y_offset = y_offset;
++ info_ptr->next_frame_delay_num = delay_num;
++ info_ptr->next_frame_delay_den = delay_den;
++ info_ptr->next_frame_dispose_op = dispose_op;
++ info_ptr->next_frame_blend_op = blend_op;
++
++ info_ptr->valid |= PNG_INFO_fcTL;
++
++ return (1);
++}
++
++void /* PRIVATE */
++png_ensure_fcTL_is_valid(png_structp png_ptr,
++ png_uint_32 width, png_uint_32 height,
++ png_uint_32 x_offset, png_uint_32 y_offset,
++ png_uint_16 delay_num, png_uint_16 delay_den,
++ png_byte dispose_op, png_byte blend_op)
++{
++ if (width + x_offset > png_ptr->first_frame_width ||
++ height + y_offset > png_ptr->first_frame_height)
++ png_error(png_ptr, "dimensions of a frame are greater than"
++ "the ones in IHDR");
++ if (width > PNG_UINT_31_MAX)
++ png_error(png_ptr, "invalid width in fcTL (> 2^31-1)");
++ if (height > PNG_UINT_31_MAX)
++ png_error(png_ptr, "invalid height in fcTL (> 2^31-1)");
++ if (x_offset > PNG_UINT_31_MAX)
++ png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)");
++ if (y_offset > PNG_UINT_31_MAX)
++ png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)");
++
++ if (dispose_op != PNG_DISPOSE_OP_NONE &&
++ dispose_op != PNG_DISPOSE_OP_BACKGROUND &&
++ dispose_op != PNG_DISPOSE_OP_PREVIOUS)
++ png_error(png_ptr, "invalid dispose_op in fcTL");
++
++ if (blend_op != PNG_BLEND_OP_SOURCE &&
++ blend_op != PNG_BLEND_OP_OVER)
++ png_error(png_ptr, "invalid blend_op in fcTL");
++}
++
++png_uint_32 PNGAPI
++png_set_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr,
++ png_byte is_hidden)
++{
++ png_debug(1, "in png_first_frame_is_hidden()");
++
++ if (png_ptr == NULL)
++ return 0;
++
++ if(is_hidden)
++ png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
++ else
++ png_ptr->apng_flags &= ~PNG_FIRST_FRAME_HIDDEN;
++
++ return 1;
++}
++#endif /* PNG_APNG_SUPPORTED */
++
+ #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+ void PNGAPI
+ png_set_unknown_chunks(png_structp png_ptr,
+diff -Naru libpng-1.5.9.org/pngstruct.h libpng-1.5.9/pngstruct.h
+--- libpng-1.5.9.org/pngstruct.h 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngstruct.h 2012-02-19 17:29:25.000000000 +0900
+@@ -332,6 +332,27 @@
+ png_alloc_size_t user_chunk_malloc_max;
+ #endif
+
++#ifdef PNG_APNG_SUPPORTED
++ png_uint_32 apng_flags;
++ png_uint_32 next_seq_num; /* next fcTL/fdAT chunk sequence
number */
++ png_uint_32 first_frame_width;
++ png_uint_32 first_frame_height;
++
++#ifdef PNG_READ_APNG_SUPPORTED
++ png_uint_32 num_frames_read; /* incremented after all image
data of */
++ /* a frame is read */
++#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
++ png_progressive_frame_ptr frame_info_fn; /* frame info read callback */
++ png_progressive_frame_ptr frame_end_fn; /* frame data read callback */
++#endif
++#endif
++
++#ifdef PNG_WRITE_APNG_SUPPORTED
++ png_uint_32 num_frames_to_write;
++ png_uint_32 num_frames_written;
++#endif
++#endif /* PNG_APNG_SUPPORTED */
++
+ /* New member added in libpng-1.0.25 and 1.2.17 */
+ #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+ /* Storage for unknown chunk that the library doesn't recognize. */
+diff -Naru libpng-1.5.9.org/pngtest.c libpng-1.5.9/pngtest.c
+--- libpng-1.5.9.org/pngtest.c 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngtest.c 2012-02-19 17:29:25.000000000 +0900
+@@ -785,6 +785,10 @@
+ jmp_buf tmp_jmpbuf;
+ #endif
+ #endif
++#ifdef PNG_APNG_SUPPORTED
++ png_uint_32 num_frames;
++ png_uint_32 num_plays;
++#endif
+
+ char inbuf[256], outbuf[256];
+
+@@ -1215,6 +1219,20 @@
+ }
+ }
+ #endif
++#ifdef PNG_APNG_SUPPORTED
++ if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_acTL))
++ {
++ if (png_get_acTL(read_ptr, read_info_ptr, &num_frames, &num_plays))
++ {
++ png_byte is_hidden;
++ pngtest_debug2("Handling acTL chunks (frames %ld, plays %ld)",
++ num_frames, num_plays);
++ png_set_acTL(write_ptr, write_info_ptr, num_frames, num_plays);
++ is_hidden = png_get_first_frame_is_hidden(read_ptr,
read_info_ptr);
++ png_set_first_frame_is_hidden(write_ptr, write_info_ptr,
is_hidden);
++ }
++ }
++#endif
+ #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+ {
+ png_unknown_chunkp unknowns;
+@@ -1307,6 +1325,89 @@
+ t_misc += (t_stop - t_start);
+ t_start = t_stop;
+ #endif
++#ifdef PNG_APNG_SUPPORTED
++ if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_acTL))
++ {
++ png_uint_32 frame;
++ for (frame = 0; frame < num_frames; frame++)
++ {
++ png_uint_32 frame_width;
++ png_uint_32 frame_height;
++ png_uint_32 x_offset;
++ png_uint_32 y_offset;
++ png_uint_16 delay_num;
++ png_uint_16 delay_den;
++ png_byte dispose_op;
++ png_byte blend_op;
++ png_read_frame_head(read_ptr, read_info_ptr);
++ if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_fcTL))
++ {
++ png_get_next_frame_fcTL(read_ptr, read_info_ptr,
++ &frame_width, &frame_height,
++ &x_offset, &y_offset,
++ &delay_num, &delay_den,
++ &dispose_op, &blend_op);
++ }
++ else
++ {
++ frame_width = width;
++ frame_height = height;
++ x_offset = 0;
++ y_offset = 0;
++ delay_num = 1;
++ delay_den = 1;
++ dispose_op = PNG_DISPOSE_OP_NONE;
++ blend_op = PNG_BLEND_OP_SOURCE;
++ }
++#ifdef PNG_WRITE_APNG_SUPPORTED
++ png_write_frame_head(write_ptr, write_info_ptr,
(png_bytepp)&row_buf,
++ frame_width, frame_height,
++ x_offset, y_offset,
++ delay_num, delay_den,
++ dispose_op, blend_op);
++#endif
++ for (pass = 0; pass < num_pass; pass++)
++ {
++ pngtest_debug1("Writing row data for pass %d", pass);
++ for (y = 0; y < frame_height; y++)
++ {
++#ifndef SINGLE_ROWBUF_ALLOC
++ pngtest_debug2("Allocating row buffer (pass %d, y =
%ld)...", pass, y);
++ row_buf = (png_bytep)png_malloc(read_ptr,
++ png_get_rowbytes(read_ptr, read_info_ptr));
++ pngtest_debug2("0x%08lx (%ld bytes)", (unsigned
long)row_buf,
++ png_get_rowbytes(read_ptr, read_info_ptr));
++#endif /* !SINGLE_ROWBUF_ALLOC */
++ png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
++
++#ifdef PNG_WRITE_SUPPORTED
++#ifdef PNGTEST_TIMING
++ t_stop = (float)clock();
++ t_decode += (t_stop - t_start);
++ t_start = t_stop;
++#endif
++ png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
++#ifdef PNGTEST_TIMING
++ t_stop = (float)clock();
++ t_encode += (t_stop - t_start);
++ t_start = t_stop;
++#endif
++#endif /* PNG_WRITE_SUPPORTED */
++
++#ifndef SINGLE_ROWBUF_ALLOC
++ pngtest_debug2("Freeing row buffer (pass %d, y = %ld)",
pass, y);
++ png_free(read_ptr, row_buf);
++ row_buf = NULL;
++#endif /* !SINGLE_ROWBUF_ALLOC */
++ }
++ }
++#ifdef PNG_WRITE_APNG_SUPPORTED
++ png_write_frame_tail(write_ptr, write_info_ptr);
++#endif
++ }
++ }
++ else
++#endif
+ for (pass = 0; pass < num_pass; pass++)
+ {
+ pngtest_debug1("Writing row data for pass %d", pass);
+diff -Naru libpng-1.5.9.org/pngwrite.c libpng-1.5.9/pngwrite.c
+--- libpng-1.5.9.org/pngwrite.c 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngwrite.c 2012-02-19 17:29:25.000000000 +0900
+@@ -58,6 +58,10 @@
+ /* The rest of these check to see if the valid field has the
appropriate
+ * flag set, and if it does, writes the chunk.
+ */
++#ifdef PNG_WRITE_APNG_SUPPORTED
++ if (info_ptr->valid & PNG_INFO_acTL)
++ png_write_acTL(png_ptr, info_ptr->num_frames, info_ptr->num_plays);
++#endif
+ #ifdef PNG_WRITE_gAMA_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_gAMA)
+ png_write_gAMA_fixed(png_ptr, info_ptr->gamma);
+@@ -304,6 +308,10 @@
+
+ if (!(png_ptr->mode & PNG_HAVE_IDAT))
+ png_error(png_ptr, "No IDATs written into file");
++#ifdef PNG_WRITE_APNG_SUPPORTED
++ if (png_ptr->num_frames_written != png_ptr->num_frames_to_write)
++ png_error(png_ptr, "Not enough frames written");
++#endif
+
+ /* See if user wants us to write information chunks */
+ if (info_ptr != NULL)
+@@ -1652,4 +1660,39 @@
+ PNG_UNUSED(params)
+ }
+ #endif
++
++#ifdef PNG_WRITE_APNG_SUPPORTED
++void PNGAPI
++png_write_frame_head(png_structp png_ptr, png_infop info_ptr,
++ png_bytepp row_pointers, png_uint_32 width, png_uint_32 height,
++ png_uint_32 x_offset, png_uint_32 y_offset,
++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
++ png_byte blend_op)
++{
++ png_debug(1, "in png_write_frame_head");
++
++ /* there is a chance this has been set after png_write_info was
called,
++ * so it would be set but not written. is there a way to be sure? */
++ if (!(info_ptr->valid & PNG_INFO_acTL))
++ png_error(png_ptr, "png_write_frame_head(): acTL not set");
++
++ png_write_reset(png_ptr);
++
++ png_write_reinit(png_ptr, info_ptr, width, height);
++
++ if ( !(png_ptr->num_frames_written == 0 &&
++ (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) ) )
++ png_write_fcTL(png_ptr, width, height, x_offset, y_offset,
++ delay_num, delay_den, dispose_op, blend_op);
++}
++
++void PNGAPI
++png_write_frame_tail(png_structp png_ptr, png_infop info_ptr)
++{
++ png_debug(1, "in png_write_frame_tail");
++
++ png_ptr->num_frames_written++;
++}
++#endif /* PNG_WRITE_APNG_SUPPORTED */
++
+ #endif /* PNG_WRITE_SUPPORTED */
+diff -Naru libpng-1.5.9.org/pngwutil.c libpng-1.5.9/pngwutil.c
+--- libpng-1.5.9.org/pngwutil.c 2012-02-19 17:29:25.000000000 +0900
++++ libpng-1.5.9/pngwutil.c 2012-02-19 17:29:25.000000000 +0900
+@@ -820,6 +820,11 @@
+ /* Write the chunk */
+ png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
+
++#ifdef PNG_WRITE_APNG_SUPPORTED
++ png_ptr->first_frame_width = width;
++ png_ptr->first_frame_height = height;
++#endif
++
+ /* Initialize zlib with PNG info */
+ png_ptr->zstream.zalloc = png_zalloc;
+ png_ptr->zstream.zfree = png_zfree;
+@@ -1034,7 +1039,28 @@
+ }
+ #endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */
+
++#ifdef PNG_WRITE_APNG_SUPPORTED
++ if(png_ptr->num_frames_written == 0)
++#endif
+ png_write_complete_chunk(png_ptr, png_IDAT, data, length);
++#ifdef PNG_WRITE_APNG_SUPPORTED
++ else
++ {
++ png_byte buf[4];
++
++ png_write_chunk_header(png_ptr, png_fdAT, 4 + length);
++
++ png_save_uint_32(buf, png_ptr->next_seq_num);
++ png_write_chunk_data(png_ptr, buf, 4);
++
++ png_write_chunk_data(png_ptr, data, length);
++
++ png_write_chunk_end(png_ptr);
++
++ png_ptr->next_seq_num++;
++ }
++#endif
++
+ png_ptr->mode |= PNG_HAVE_IDAT;
+
+ /* Prior to 1.5.4 this code was replicated in every caller (except
at the
+@@ -1998,6 +2024,64 @@
+ }
+ #endif
+
++#ifdef PNG_WRITE_APNG_SUPPORTED
++void /* PRIVATE */
++png_write_acTL(png_structp png_ptr,
++ png_uint_32 num_frames, png_uint_32 num_plays)
++{
++ png_byte data[16];
++
++ png_debug(1, "in png_write_acTL");
++
++ png_ptr->num_frames_to_write = num_frames;
++
++ if (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN)
++ num_frames--;
++
++ png_save_uint_32(data, num_frames);
++ png_save_uint_32(data + 4, num_plays);
++
++ png_write_complete_chunk(png_ptr, png_acTL, data, (png_size_t)8);
++}
++
++void /* PRIVATE */
++png_write_fcTL(png_structp png_ptr, png_uint_32 width, png_uint_32
height,
++ png_uint_32 x_offset, png_uint_32 y_offset,
++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
++ png_byte blend_op)
++{
++ png_byte data[26];
++
++ png_debug(1, "in png_write_fcTL");
++
++ if (png_ptr->num_frames_written == 0 && (x_offset != 0 || y_offset
!= 0))
++ png_error(png_ptr, "x and/or y offset for the first frame
aren't 0");
++ if (png_ptr->num_frames_written == 0 &&
++ (width != png_ptr->first_frame_width ||
++ height != png_ptr->first_frame_height))
++ png_error(png_ptr, "width and/or height in the first frame's
fcTL "
++ "don't match the ones in IHDR");
++
++ /* more error checking */
++ png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset,
++ delay_num, delay_den, dispose_op, blend_op);
++
++ png_save_uint_32(data, png_ptr->next_seq_num);
++ png_save_uint_32(data + 4, width);
++ png_save_uint_32(data + 8, height);
++ png_save_uint_32(data + 12, x_offset);
++ png_save_uint_32(data + 16, y_offset);
++ png_save_uint_16(data + 20, delay_num);
++ png_save_uint_16(data + 22, delay_den);
++ data[24] = dispose_op;
++ data[25] = blend_op;
++
++ png_write_complete_chunk(png_ptr, png_fcTL, data, (png_size_t)26);
++
++ png_ptr->next_seq_num++;
++}
++#endif /* PNG_WRITE_APNG_SUPPORTED */
++
+ /* Initializes the row writing capability of libpng */
+ void /* PRIVATE */
+ png_write_start_row(png_structp png_ptr)
+@@ -3177,4 +3261,39 @@
+ }
+ #endif
+ }
++
++#ifdef PNG_WRITE_APNG_SUPPORTED
++void /* PRIVATE */
++png_write_reset(png_structp png_ptr)
++{
++ png_ptr->row_number = 0;
++ png_ptr->pass = 0;
++ png_ptr->mode &= ~PNG_HAVE_IDAT;
++}
++
++void /* PRIVATE */
++png_write_reinit(png_structp png_ptr, png_infop info_ptr,
++ png_uint_32 width, png_uint_32 height)
++{
++ if (png_ptr->num_frames_written == 0 &&
++ (width != png_ptr->first_frame_width ||
++ height != png_ptr->first_frame_height))
++ png_error(png_ptr, "width and/or height in the first frame's
fcTL "
++ "don't match the ones in IHDR");
++ if (width > png_ptr->first_frame_width ||
++ height > png_ptr->first_frame_height)
++ png_error(png_ptr, "width and/or height for a frame greater than"
++ "the ones in IHDR");
++
++ png_set_IHDR(png_ptr, info_ptr, width, height,
++ info_ptr->bit_depth, info_ptr->color_type,
++ info_ptr->interlace_type, info_ptr->compression_type,
++ info_ptr->filter_type);
++
++ png_ptr->width = width;
++ png_ptr->height = height;
++ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
++ png_ptr->usr_width = png_ptr->width;
++}
++#endif
+ #endif /* PNG_WRITE_SUPPORTED */
@@ -4,10 +4,10 @@
#
#############################################################
-LIBPNG_VERSION = 1.4.12
-LIBPNG_SERIES = 14
-LIBPNG_SITE =
http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/project/libpng/libpng$(LIBPNG_SERIES)/$(LIBPNG_VERSION)
-LIBPNG_SOURCE = libpng-$(LIBPNG_VERSION).tar.bz2
+LIBPNG_VERSION = 1.5.9
+LIBPNG_SERIES = 15
+LIBPNG_SITE =
http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/project/libpng/libpng$(LIBPNG_SERIES)/older-releases/$(LIBPNG_VERSION)
+LIBPNG_SOURCE = libpng-$(LIBPNG_VERSION).tar.xz
LIBPNG_INSTALL_STAGING = YES
Signed-off-by: Stefan Froberg <stefan.froberg@petroprogram.com> --- package/libpng/libpng-1.5.9-apng.patch | 1641 ++++++++++++++++++++++++++++++++ package/libpng/libpng.mk | 8 +- 2 files changed, 1645 insertions(+), 4 deletions(-) create mode 100644 package/libpng/libpng-1.5.9-apng.patch LIBPNG_DEPENDENCIES = host-pkg-config zlib