diff options
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_depth.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_depth.c b/src/gallium/drivers/llvmpipe/lp_bld_depth.c index afdf4009af0..1b59a13c946 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_depth.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_depth.c @@ -608,12 +608,25 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, } if (depth->writemask) { - if(z_bitmask) - z_bitmask = LLVMBuildAnd(builder, mask->value, z_bitmask, ""); - else - z_bitmask = mask->value; + LLVMValueRef zselectmask = mask->value; - z_dst = lp_build_select(&bld, z_bitmask, z_src, z_dst); + /* mask off bits that failed Z test */ + zselectmask = LLVMBuildAnd(builder, zselectmask, z_pass, ""); + + /* mask off bits that failed stencil test */ + if (s_pass_mask) { + zselectmask = LLVMBuildAnd(builder, zselectmask, s_pass_mask, ""); + } + + /* if combined Z/stencil format, mask off the stencil bits */ + if (z_bitmask) { + zselectmask = LLVMBuildAnd(builder, zselectmask, z_bitmask, ""); + } + + /* Mix the old and new Z buffer values. + * z_dst[i] = zselectmask[i] ? z_src[i] : z_dst[i] + */ + z_dst = lp_build_select(&bld, zselectmask, z_src, z_dst); } if (stencil[0].enabled) { |