From 183855e396cc6918d36fbf3e38ea426e934b4e3e Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Thu, 15 Apr 2021 22:46:11 -0300
Subject: shader: Implement tessellation shaders, polygon mode and invocation
id
---
src/shader_recompiler/backend/spirv/emit_spirv.cpp | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
(limited to 'src/shader_recompiler/backend/spirv/emit_spirv.cpp')
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.cpp b/src/shader_recompiler/backend/spirv/emit_spirv.cpp
index 3bf4c6a9ec..105602ccf5 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv.cpp
@@ -45,6 +45,8 @@ ArgType Arg(EmitContext& ctx, const IR::Value& arg) {
return arg.Label();
} else if constexpr (std::is_same_v<ArgType, IR::Attribute>) {
return arg.Attribute();
+ } else if constexpr (std::is_same_v<ArgType, IR::Patch>) {
+ return arg.Patch();
} else if constexpr (std::is_same_v<ArgType, IR::Reg>) {
return arg.Reg();
}
@@ -120,6 +122,30 @@ Id DefineMain(EmitContext& ctx, IR::Program& program) {
return main;
}
+spv::ExecutionMode ExecutionMode(TessPrimitive primitive) {
+ switch (primitive) {
+ case TessPrimitive::Isolines:
+ return spv::ExecutionMode::Isolines;
+ case TessPrimitive::Triangles:
+ return spv::ExecutionMode::Triangles;
+ case TessPrimitive::Quads:
+ return spv::ExecutionMode::Quads;
+ }
+ throw InvalidArgument("Tessellation primitive {}", primitive);
+}
+
+spv::ExecutionMode ExecutionMode(TessSpacing spacing) {
+ switch (spacing) {
+ case TessSpacing::Equal:
+ return spv::ExecutionMode::SpacingEqual;
+ case TessSpacing::FractionalOdd:
+ return spv::ExecutionMode::SpacingFractionalOdd;
+ case TessSpacing::FractionalEven:
+ return spv::ExecutionMode::SpacingFractionalEven;
+ }
+ throw InvalidArgument("Tessellation spacing {}", spacing);
+}
+
void DefineEntryPoint(const IR::Program& program, EmitContext& ctx, Id main) {
const std::span interfaces(ctx.interfaces.data(), ctx.interfaces.size());
spv::ExecutionModel execution_model{};
@@ -134,6 +160,19 @@ void DefineEntryPoint(const IR::Program& program, EmitContext& ctx, Id main) {
case Stage::VertexB:
execution_model = spv::ExecutionModel::Vertex;
break;
+ case Stage::TessellationControl:
+ execution_model = spv::ExecutionModel::TessellationControl;
+ ctx.AddCapability(spv::Capability::Tessellation);
+ ctx.AddExecutionMode(main, spv::ExecutionMode::OutputVertices, program.invocations);
+ break;
+ case Stage::TessellationEval:
+ execution_model = spv::ExecutionModel::TessellationEvaluation;
+ ctx.AddCapability(spv::Capability::Tessellation);
+ ctx.AddExecutionMode(main, ExecutionMode(ctx.profile.tess_primitive));
+ ctx.AddExecutionMode(main, ExecutionMode(ctx.profile.tess_spacing));
+ ctx.AddExecutionMode(main, ctx.profile.tess_clockwise ? spv::ExecutionMode::VertexOrderCw
+ : spv::ExecutionMode::VertexOrderCcw);
+ break;
case Stage::Geometry:
execution_model = spv::ExecutionModel::Geometry;
ctx.AddCapability(spv::Capability::Geometry);
--
cgit v1.2.3-70-g09d2