diff options
| author | Stefan Dösinger <[email protected]> | 2012-12-07 17:38:35 +0100 |
|---|---|---|
| committer | Marek Olšák <[email protected]> | 2012-12-07 17:48:16 +0100 |
| commit | ff5a9868c8d5041a3d944ce300c857934f4e8251 (patch) | |
| tree | ba6b1076994706d895c3422ce69401db55debb95 /src | |
| parent | ff574d653b0731a324fd30324b0f211502219abf (diff) | |
r300: Don't disable destination read if the src blend factor needs it
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.
Signed-off-by: Marek Olšák <[email protected]>
Diffstat (limited to 'src')
| -rw-r--r-- | 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 fba2d35b8f9..050c8f44550 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; } } |