This accelerates poly_fill_rect using GPU-based geometry computation
Improves x11perf -rect100 by 41.5127% +/- 7.63888% (n=10)
Improves x11perf -rect10 by 3745.72% +/- 94.7503% (n=6)
v2: Rebase on skipping the prepare rewrite for now, and fix the GLSL
1.20 and GLES2 cases (changes by anholt).
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
