The AoS version of ld_build_blend_factor was assuming that if the first
channel was alpha, there were no rgb components.
Fixes several piglit tests on System z. No piglit regressions on x86_64.
The shortcut is still used in tests like spec/ARB_framebuffer_object/
fbo-alpha.
Signed-off-by: Richard Sandiford <rsand...@linux.vnet.ibm.com>
---
src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
index c4d04a2..7c485e7 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
@@ -245,7 +245,7 @@ lp_build_blend_factor(struct lp_build_blend_aos_context
*bld,
LLVMValueRef rgb_factor_, alpha_factor_;
enum lp_build_blend_swizzle rgb_swizzle;
- if (alpha_swizzle == 0) {
+ if (alpha_swizzle == UTIL_FORMAT_SWIZZLE_X && num_channels == 1) {
return lp_build_blend_factor_unswizzled(bld, alpha_factor, TRUE);
}
--
1.7.11.7
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