The read can remain disabled if the src alpha factor needs it because the result would still be zero.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=57984 NOTE: This is a candidate for stable release branches. --- src/gallium/drivers/r300/r300_state.c | 12 ++++++++++-- 1 files changed, 10 insertions(+), 2 deletions(-) diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c index fba2d35..050c8f4 100644 --- a/src/gallium/drivers/r300/r300_state.c +++ b/src/gallium/drivers/r300/r300_state.c @@ -288,7 +288,11 @@ static void* r300_create_blend_state(struct pipe_context* pipe, dstRGB == PIPE_BLENDFACTOR_ZERO) && (dstA == PIPE_BLENDFACTOR_SRC_COLOR || dstA == PIPE_BLENDFACTOR_SRC_ALPHA || - dstA == PIPE_BLENDFACTOR_ZERO)) { + dstA == PIPE_BLENDFACTOR_ZERO) && + (srcRGB != PIPE_BLENDFACTOR_DST_COLOR && + srcRGB != PIPE_BLENDFACTOR_DST_ALPHA && + srcRGB != PIPE_BLENDFACTOR_INV_DST_COLOR && + srcRGB != PIPE_BLENDFACTOR_INV_DST_ALPHA)) { blend_control |= R500_SRC_ALPHA_0_NO_READ; } @@ -297,7 +301,11 @@ static void* r300_create_blend_state(struct pipe_context* pipe, dstRGB == PIPE_BLENDFACTOR_ZERO) && (dstA == PIPE_BLENDFACTOR_INV_SRC_COLOR || dstA == PIPE_BLENDFACTOR_INV_SRC_ALPHA || - dstA == PIPE_BLENDFACTOR_ZERO)) { + dstA == PIPE_BLENDFACTOR_ZERO) && + (srcRGB != PIPE_BLENDFACTOR_DST_COLOR && + srcRGB != PIPE_BLENDFACTOR_DST_ALPHA && + srcRGB != PIPE_BLENDFACTOR_INV_DST_COLOR && + srcRGB != PIPE_BLENDFACTOR_INV_DST_ALPHA)) { blend_control |= R500_SRC_ALPHA_1_NO_READ; } } -- 1.7.8.6 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
