diff options
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_depth.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_depth.c b/src/gallium/drivers/llvmpipe/lp_bld_depth.c index 8efa75c01d3..5c3715aa8fb 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_depth.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_depth.c @@ -273,11 +273,17 @@ lp_build_stencil_op(struct lp_build_context *bld, res = lp_build_select(bld, front_facing, res, back_res); } - /* XXX what about the back-face writemask? */ - if (stencil[0].writemask != 0xff) { + if (stencil[0].writemask != 0xff || + (stencil[1].enabled && front_facing != NULL && stencil[1].writemask != 0xff)) { /* mask &= stencil[0].writemask */ LLVMValueRef writemask = lp_build_const_int_vec(bld->gallivm, bld->type, stencil[0].writemask); + if (stencil[1].enabled && stencil[1].writemask != stencil[0].writemask && front_facing != NULL) { + LLVMValueRef back_writemask = lp_build_const_int_vec(bld->gallivm, bld->type, + stencil[1].writemask); + writemask = lp_build_select(bld, front_facing, writemask, back_writemask); + } + mask = LLVMBuildAnd(builder, mask, writemask, ""); /* res = (res & mask) | (stencilVals & ~mask) */ res = lp_build_select_bitwise(bld, mask, res, stencilVals); |