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gl renderer: Flip the framebuffer when dumping it

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This commit is contained in:
Timm Bäder
2018-12-12 09:23:23 +01:00
parent cdbb8d1e0f
commit fcfab338ec
1 changed files with 14 additions and 3 deletions
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17
gsk/gl/gskglrenderer.c
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@@ -134,16 +134,27 @@ print_render_node_tree (GskRenderNode *root, int level)
static void G_GNUC_UNUSED
dump_framebuffer (const char *filename, int w, int h)
{
int stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, w);
const int stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, w);
guchar *data = g_malloc (h * stride);
guchar *flipped = g_malloc (h * stride);
cairo_surface_t *s;
int i;
glReadPixels (0, 0, w, h, GL_BGRA, GL_UNSIGNED_BYTE, data);
s = cairo_image_surface_create_for_data (data, CAIRO_FORMAT_ARGB32, w, h, stride);
for (i = 0; i < h; i ++)
{
memcpy (flipped + (stride * i),
data + ((h - 1 - i) * stride),
stride);
}
g_free (data);
s = cairo_image_surface_create_for_data (flipped, CAIRO_FORMAT_ARGB32, w, h, stride);
cairo_surface_write_to_png (s, filename);
cairo_surface_destroy (s);
g_free (data);
g_free (flipped);
}
static gboolean