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cogl: Read pixels in the correct 32bit format as per the given bitmap
Fixes the gnome-shell screenshot tool from getting colors with the wrong byte order. https://bugzilla.gnome.org/show_bug.cgi?id=779234
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@ -1418,6 +1418,15 @@ _cogl_framebuffer_gl_read_pixels_into_bitmap (CoglFramebuffer *framebuffer,
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&gl_format,
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&gl_type);
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/* As we are reading pixels, we want to consider the bitmap according to
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* its real pixel format, not the swizzled channels we pretend face to the
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* pipeline.
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*/
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if ((format == COGL_PIXEL_FORMAT_BGRA_8888 ||
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format == COGL_PIXEL_FORMAT_BGRA_8888_PRE) &&
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_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_TEXTURE_SWIZZLE))
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gl_format = GL_BGRA;
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/* NB: All offscreen rendering is done upside down so there is no need
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* to flip in this case... */
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if (_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_MESA_PACK_INVERT) &&
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