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| author | Michel Dänzer <michel.daenzer@amd.com> | 2012-11-02 15:57:30 +0100 |
|---|---|---|
| committer | Michel Dänzer <michel@daenzer.net> | 2012-11-12 15:45:42 +0100 |
| commit | 7708a864648aecd8aafb484ec7db18c2aba9e957 (patch) | |
| tree | 5cf18063bcc9ef3d1a2a0ea2732b706d33019f09 /src/gallium/drivers/radeonsi/radeonsi_shader.c | |
| parent | e44dfd4b3c68d58b16fa6943b82963809ab2d177 (diff) | |
| download | external_mesa3d-7708a864648aecd8aafb484ec7db18c2aba9e957.zip external_mesa3d-7708a864648aecd8aafb484ec7db18c2aba9e957.tar.gz external_mesa3d-7708a864648aecd8aafb484ec7db18c2aba9e957.tar.bz2 | |
radeonsi: Implement alpha testing in pixel shader.
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Diffstat (limited to 'src/gallium/drivers/radeonsi/radeonsi_shader.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/radeonsi_shader.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/radeonsi_shader.c b/src/gallium/drivers/radeonsi/radeonsi_shader.c index ce2095c..ec9d9f3 100644 --- a/src/gallium/drivers/radeonsi/radeonsi_shader.c +++ b/src/gallium/drivers/radeonsi/radeonsi_shader.c @@ -31,6 +31,7 @@ #include "gallivm/lp_bld_const.h" #include "gallivm/lp_bld_gather.h" #include "gallivm/lp_bld_intr.h" +#include "gallivm/lp_bld_logic.h" #include "gallivm/lp_bld_tgsi.h" #include "radeon_llvm.h" #include "radeon_llvm_emit.h" @@ -546,6 +547,37 @@ static void si_llvm_emit_prologue(struct lp_build_tgsi_context *bld_base) } +static void si_alpha_test(struct lp_build_tgsi_context *bld_base, + unsigned index) +{ + struct si_shader_context *si_shader_ctx = si_shader_context(bld_base); + struct gallivm_state *gallivm = bld_base->base.gallivm; + + if (si_shader_ctx->key.alpha_func != PIPE_FUNC_NEVER) { + LLVMValueRef out_ptr = si_shader_ctx->radeon_bld.soa.outputs[index][3]; + LLVMValueRef alpha_pass = + lp_build_cmp(&bld_base->base, + si_shader_ctx->key.alpha_func, + LLVMBuildLoad(gallivm->builder, out_ptr, ""), + lp_build_const_float(gallivm, si_shader_ctx->key.alpha_ref)); + LLVMValueRef arg = + lp_build_select(&bld_base->base, + alpha_pass, + lp_build_const_float(gallivm, 1.0f), + lp_build_const_float(gallivm, -1.0f)); + + build_intrinsic(gallivm->builder, + "llvm.AMDGPU.kill", + LLVMVoidTypeInContext(gallivm->context), + &arg, 1, 0); + } else { + build_intrinsic(gallivm->builder, + "llvm.AMDGPU.kilp", + LLVMVoidTypeInContext(gallivm->context), + NULL, 0, 0); + } +} + /* XXX: This is partially implemented for VS only at this point. It is not complete */ static void si_llvm_emit_epilogue(struct lp_build_tgsi_context * bld_base) { @@ -606,6 +638,10 @@ static void si_llvm_emit_epilogue(struct lp_build_tgsi_context * bld_base) param_count++; } else { target = V_008DFC_SQ_EXP_MRT + color_count; + if (color_count == 0 && + si_shader_ctx->key.alpha_func != PIPE_FUNC_ALWAYS) + si_alpha_test(bld_base, index); + color_count++; } break; |