vrend: use uniform for alpha func value
Some applications change glAlphaFunc nearly every frame.
Sam 3 apitrace replay went from ~4 fps to ~19 fps on a chromebook.
Signed-off-by: John Bates jbates@chromium.com
Edited by John Bates
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Some applications change glAlphaFunc nearly every frame.
Sam 3 apitrace replay went from ~4 fps to ~19 fps on a chromebook.
Signed-off-by: John Bates jbates@chromium.com