diff mbox series

[2/3] console: modify ppm_save to take a pixman image ref

Message ID 20201010204106.1368710-3-marcandre.lureau@redhat.com
State New
Headers show
Series console: make QMP screendump use coroutine | expand

Commit Message

Marc-André Lureau Oct. 10, 2020, 8:41 p.m. UTC 
From: Marc-André Lureau <marcandre.lureau@redhat.com>

The function is going to be called from a coroutine, and may yields.
Let's ensure our image reference doesn't change over time (due to resize
etc) by keeping a ref.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 ui/console.c    | 15 ++++++++-------
 ui/trace-events |  2 +-
 2 files changed, 9 insertions(+), 8 deletions(-)

Comments

Markus Armbruster Oct. 27, 2020, 7:27 a.m. UTC | #1 
marcandre.lureau@redhat.com writes:

> From: Marc-André Lureau <marcandre.lureau@redhat.com>
>
> The function is going to be called from a coroutine, and may yields.

s/yields/yield/

> Let's ensure our image reference doesn't change over time (due to resize
> etc) by keeping a ref.
>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

Reviewed-by: Markus Armbruster <armbru@redhat.com>
diff mbox series

Patch

diff --git a/ui/console.c b/ui/console.c
index 54a74c0b16..a56fe0dd26 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -195,7 +195,6 @@  static void dpy_refresh(DisplayState *s);
 static DisplayState *get_alloc_displaystate(void);
 static void text_console_update_cursor_timer(void);
 static void text_console_update_cursor(void *opaque);
-static bool ppm_save(int fd, DisplaySurface *ds, Error **errp);
 
 static void gui_update(void *opaque)
 {
@@ -311,16 +310,16 @@  void graphic_hw_invalidate(QemuConsole *con)
     }
 }
 
-static bool ppm_save(int fd, DisplaySurface *ds, Error **errp)
+static bool ppm_save(int fd, pixman_image_t *image, Error **errp)
 {
-    int width = pixman_image_get_width(ds->image);
-    int height = pixman_image_get_height(ds->image);
+    int width = pixman_image_get_width(image);
+    int height = pixman_image_get_height(image);
     g_autoptr(Object) ioc = OBJECT(qio_channel_file_new_fd(fd));
     g_autofree char *header = NULL;
     g_autoptr(pixman_image_t) linebuf = NULL;
     int y;
 
-    trace_ppm_save(fd, ds);
+    trace_ppm_save(fd, image);
 
     header = g_strdup_printf("P6\n%d %d\n%d\n", width, height, 255);
     if (qio_channel_write_all(QIO_CHANNEL(ioc),
@@ -330,7 +329,7 @@  static bool ppm_save(int fd, DisplaySurface *ds, Error **errp)
 
     linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, width);
     for (y = 0; y < height; y++) {
-        qemu_pixman_linebuf_fill(linebuf, ds->image, width, 0, y);
+        qemu_pixman_linebuf_fill(linebuf, image, width, 0, y);
         if (qio_channel_write_all(QIO_CHANNEL(ioc),
                                   (char *)pixman_image_get_data(linebuf),
                                   pixman_image_get_stride(linebuf), errp) < 0) {
@@ -344,6 +343,7 @@  static bool ppm_save(int fd, DisplaySurface *ds, Error **errp)
 void qmp_screendump(const char *filename, bool has_device, const char *device,
                     bool has_head, int64_t head, Error **errp)
 {
+    g_autoptr(pixman_image_t) image = NULL;
     QemuConsole *con;
     DisplaySurface *surface;
     int fd;
@@ -372,6 +372,7 @@  void qmp_screendump(const char *filename, bool has_device, const char *device,
         error_setg(errp, "no surface");
         return;
     }
+    image = pixman_image_ref(surface->image);
 
     fd = qemu_open_old(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
     if (fd == -1) {
@@ -380,7 +381,7 @@  void qmp_screendump(const char *filename, bool has_device, const char *device,
         return;
     }
 
-    if (!ppm_save(fd, surface, errp)) {
+    if (!ppm_save(fd, image, errp)) {
         qemu_unlink(filename);
     }
 }
diff --git a/ui/trace-events b/ui/trace-events
index b7d7270c02..0ffcdb4408 100644
--- a/ui/trace-events
+++ b/ui/trace-events
@@ -15,7 +15,7 @@  displaysurface_create_pixman(void *display_surface) "surface=%p"
 displaysurface_free(void *display_surface) "surface=%p"
 displaychangelistener_register(void *dcl, const char *name) "%p [ %s ]"
 displaychangelistener_unregister(void *dcl, const char *name) "%p [ %s ]"
-ppm_save(int fd, void *display_surface) "fd=%d surface=%p"
+ppm_save(int fd, void *image) "fd=%d image=%p"
 
 # gtk-egl.c
 # gtk-gl-area.c