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Diffstat (limited to '')
-rw-r--r-- | src/video_core/renderer_vulkan/vk_shader_decompiler.cpp | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp index a20452b87..1c52f40bb 100644 --- a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp +++ b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp @@ -2075,6 +2075,45 @@ private: return {}; } + Id MaxwellToSpirvComparison(Maxwell::ComparisonOp compare_op, Id operand_1, Id operand_2) { + using Compare = Maxwell::ComparisonOp; + switch (compare_op) { + case Compare::NeverOld: + return v_false; // Never let the test pass + case Compare::LessOld: + return OpFOrdLessThan(t_bool, operand_1, operand_2); + case Compare::EqualOld: + return OpFOrdEqual(t_bool, operand_1, operand_2); + case Compare::LessEqualOld: + return OpFOrdLessThanEqual(t_bool, operand_1, operand_2); + case Compare::GreaterOld: + return OpFOrdGreaterThan(t_bool, operand_1, operand_2); + case Compare::NotEqualOld: + return OpFOrdNotEqual(t_bool, operand_1, operand_2); + case Compare::GreaterEqualOld: + return OpFOrdGreaterThanEqual(t_bool, operand_1, operand_2); + default: + UNREACHABLE(); + } + } + + void AlphaTest(Id pointer) { + if (specialization.alpha_test_func == Maxwell::ComparisonOp::AlwaysOld) { + return; + } + const Id true_label = OpLabel(); + const Id discard_label = OpLabel(); + const Id alpha_reference = Constant(t_float, specialization.alpha_test_ref); + const Id alpha_value = OpLoad(t_float, pointer); + const Id condition = + MaxwellToSpirvComparison(specialization.alpha_test_func, alpha_value, alpha_reference); + + OpBranchConditional(condition, true_label, discard_label); + AddLabel(discard_label); + OpKill(); + AddLabel(true_label); + } + void PreExit() { if (stage == ShaderType::Vertex && specialization.ndc_minus_one_to_one) { const u32 position_index = out_indices.position.value(); @@ -2097,8 +2136,6 @@ private: UNIMPLEMENTED_IF_MSG(header.ps.omap.sample_mask != 0, "Sample mask write is unimplemented"); - // TODO(Rodrigo): Alpha testing - // Write the color outputs using the data in the shader registers, disabled // rendertargets/components are skipped in the register assignment. u32 current_reg = 0; @@ -2110,6 +2147,9 @@ private: } const Id pointer = AccessElement(t_out_float, frag_colors[rt], component); OpStore(pointer, SafeGetRegister(current_reg)); + if (rt == 0 && component == 3) { + AlphaTest(pointer); + } ++current_reg; } } |