RENDER requires that sampling outside of any source/mask picture results
in alpha == 0.0.
The OpenGL border colour cannot set alpha = 0.0 if the texture format
doesn't have an alpha channel, so we have to use the RepeatFix handling
in that case.
Also, only force alpha = 1.0 when sampling inside of RGBx source/mask
pictures.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94514
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
4711ebc174