[Bug 797091] cairooverlay: passes un-premultiplied ARGB to Cairo

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=797091

Nicolas Dufresne (ndufresne) <nicolas at ndufresne.ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |nicolas at ndufresne.ca
            Summary|cairooverlay: ARGB format   |cairooverlay: passes
                   |mismatch between GStreamer  |un-premultiplied ARGB to
                   |and Cairo                   |Cairo

--- Comment #2 from Nicolas Dufresne (ndufresne) <nicolas at ndufresne.ca> ---
Reworded, the way you wrote it initially, it sounded more like it was
"suboptimal" rather then broken. For textoverlay we use premultiply alpha
support from GstVideoOverlayComposition helpers. So in that case, if it's
broken it's a regression.

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