diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c index 337b6f73fd1..4305c49c482 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c @@ -1484,12 +1484,26 @@ lp_build_sample_compare(struct lp_build_sample_context *bld, * should be converted to the depth format (quantization!) and comparison * then done in texture format. */ + /* result = (p FUNC texel) ? 1 : 0 */ - res = lp_build_cmp(texel_bld, bld->static_sampler_state->compare_func, - p, texel[chan]); + /* + * honor d3d10 floating point rules here, which state that comparisons + * are ordered except NOT_EQUAL which is unordered. + */ + if (bld->static_sampler_state->compare_func != PIPE_FUNC_NOTEQUAL) { + res = lp_build_cmp_ordered(texel_bld, bld->static_sampler_state->compare_func, + p, texel[chan]); + } + else { + res = lp_build_cmp(texel_bld, bld->static_sampler_state->compare_func, + p, texel[chan]); + } res = lp_build_select(texel_bld, res, texel_bld->one, texel_bld->zero); - /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */ + /* + * returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE. + * This should be ok because sampler swizzle is applied on top of it. + */ texel[0] = texel[1] = texel[2] = res; |