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shader: Implement tessellation shaders, polygon mode and invocation id

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This commit is contained in:
ReinUsesLisp 2021-04-15 22:46:11 -03:00 • committed by ameerj
parent 34519d3fc6
commit 183855e396
28 changed files with 605 additions and 91 deletions
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39
src/shader_recompiler/backend/spirv/emit_spirv.cpp
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@ -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);