Re: [PATCH 3/3] gdiplus: Fix animated gif frames composition

[Vincent Povirk]

+    hr = IWICBitmapFrameDecode_QueryInterface(frame,
&IID_IWICBitmapSource, (void**)&bmp_source);

FrameDecode inherits Source so I don't think this is necessary?

None of this seems obviously wrong to me, but it is complicated and
interesting behavior. I'm not sure if I understand it all.