list of possible formats https://msdn.microsoft.com/en-us/library/windows/desktop/bb173059%28v=vs.85%29.aspx

the ones marked BROKEN_PIXEL are not writing pixels properly, not knowing much
about pixel shaders, I'm not the best qualified to handle this

the ones marked UNTESTED means my Win8 machine doesn't support them
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>