Olivier Fourdan <ofour...@redhat.com> writes: > For some hardware, GL_RGBA is the safest option for textures to bind to > an FBO for depth 8 as GL_ALPHA might be unsupported. > > This allows using glamor-xv on hardware that don't support GL_ALPHA > textures attaching to an FBO, such as nouveau on nv30. > > Newer hardware use GL_RED and texture swizzle anyway, so this change is > of limited impact.
Does nv30 not support *any* 8-bit render target? Also, blowing up our XV textures to 32-bit can't be good for its performance. Could we just use GLAMOR_CREATE_FBO_NO_FBO (worst name) to have our XV pixmaps not actually create an FBO? We already use glamor_upload_boxes(), so I think that would work.
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