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cogl: Read pixels in the correct 32bit format as per the given bitmap

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Fixes the gnome-shell screenshot tool from getting colors with the
wrong byte order.

https://bugzilla.gnome.org/show_bug.cgi?id=779234
This commit is contained in:
Carlos Garnacho 2017-03-01 18:53:57 +01:00
parent 89871e04aa
commit 95e9fa10ef
1 changed files with 9 additions and 0 deletions
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9
cogl/cogl/driver/gl/cogl-framebuffer-gl.c
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@ -1418,6 +1418,15 @@ _cogl_framebuffer_gl_read_pixels_into_bitmap (CoglFramebuffer *framebuffer,
&gl_format,
&gl_type);
/* As we are reading pixels, we want to consider the bitmap according to
* its real pixel format, not the swizzled channels we pretend face to the
* pipeline.
*/
if ((format == COGL_PIXEL_FORMAT_BGRA_8888 ||
format == COGL_PIXEL_FORMAT_BGRA_8888_PRE) &&
_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_TEXTURE_SWIZZLE))
gl_format = GL_BGRA;
/* NB: All offscreen rendering is done upside down so there is no need
* to flip in this case... */
if (_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_MESA_PACK_INVERT) &&