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freedreno/a2xx: fix SRC_ALPHA_SATURATE for alpha blend function

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Fixes failures in the following deqp tests:
dEQP-GLES2.functional.fragment_ops.*src_alpha_saturate*

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Jonathan Marek 2019-09-04 22:36:00 -04:00
parent 80906a12d9
commit ac4ca24c32
1 changed files with 6 additions and 1 deletions
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7
src/gallium/drivers/freedreno/a2xx/fd2_blend.c
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@ -83,8 +83,13 @@ fd2_blend_state_create(struct pipe_context *pctx,
A2XX_RB_BLEND_CONTROL_COLOR_COMB_FCN(blend_func(rt->rgb_func)) |
A2XX_RB_BLEND_CONTROL_COLOR_DESTBLEND(fd_blend_factor(rt->rgb_dst_factor));
/* hardware doesn't support SRC_ALPHA_SATURATE for alpha, but it is equivalent to ONE */
unsigned alpha_src_factor = rt->alpha_src_factor;
if (alpha_src_factor == PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE)
alpha_src_factor = PIPE_BLENDFACTOR_ONE;
so->rb_blendcontrol_alpha =
A2XX_RB_BLEND_CONTROL_ALPHA_SRCBLEND(fd_blend_factor(rt->alpha_src_factor)) |
A2XX_RB_BLEND_CONTROL_ALPHA_SRCBLEND(fd_blend_factor(alpha_src_factor)) |
A2XX_RB_BLEND_CONTROL_ALPHA_COMB_FCN(blend_func(rt->alpha_func)) |
A2XX_RB_BLEND_CONTROL_ALPHA_DESTBLEND(fd_blend_factor(rt->alpha_dst_factor));