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llvmpipe: point out that there's two stencil writemasks 

In lp_build_stencil_op() the incoming 'stencil' var is a 2-element array.
There's a front-face writemask and a back-face writemask but we're ignoring
the later.  This patch doesn't fix anything but at least points out the
problem.
This commit is contained in:
Brian Paul 2011-10-23 10:08:06 -06:00
parent c7aa8da957
commit 33abbd4fbd
1 changed files with 4 additions and 3 deletions
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7
src/gallium/drivers/llvmpipe/lp_bld_depth.c
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@ -263,10 +263,11 @@ lp_build_stencil_op(struct lp_build_context *bld,
res = lp_build_select(bld, front_facing, res, back_res);
}
if (stencil->writemask != 0xff) {
/* mask &= stencil->writemask */
/* XXX what about the back-face writemask? */
if (stencil[0].writemask != 0xff) {
/* mask &= stencil[0].writemask */
LLVMValueRef writemask = lp_build_const_int_vec(bld->gallivm, bld->type,
stencil->writemask);
stencil[0].writemask);
mask = LLVMBuildAnd(builder, mask, writemask, "");
/* res = (res & mask) | (stencilVals & ~mask) */
res = lp_build_select_bitwise(bld, mask, res, stencilVals);