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glasm: Add tessellation shader declarations
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@ -347,6 +347,30 @@ std::string_view OutputPrimitive(OutputTopology topology) {
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}
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throw InvalidArgument("Invalid output topology {}", topology);
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}
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std::string_view GetTessMode(TessPrimitive primitive) {
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switch (primitive) {
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case TessPrimitive::Triangles:
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return "TRIANGLES";
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case TessPrimitive::Quads:
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return "QUADS";
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case TessPrimitive::Isolines:
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return "ISOLINES";
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}
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throw InvalidArgument("Invalid tessellation primitive {}", primitive);
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}
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std::string_view GetTessSpacing(TessSpacing spacing) {
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switch (spacing) {
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case TessSpacing::Equal:
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return "EQUAL";
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case TessSpacing::FractionalOdd:
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return "FRACTIONAL_ODD";
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case TessSpacing::FractionalEven:
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return "FRACTIONAL_EVEN";
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}
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throw InvalidArgument("Invalid tessellation spacing {}", spacing);
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}
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} // Anonymous namespace
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std::string EmitGLASM(const Profile& profile, IR::Program& program, Bindings& bindings) {
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@ -356,6 +380,17 @@ std::string EmitGLASM(const Profile& profile, IR::Program& program, Bindings& bi
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std::string header{StageHeader(program.stage)};
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SetupOptions(program, profile, header);
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switch (program.stage) {
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case Stage::TessellationControl:
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header += fmt::format("VERTICES_OUT {};", program.invocations);
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break;
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case Stage::TessellationEval:
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header +=
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fmt::format("TESS_MODE {};"
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"TESS_SPACING {};"
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"TESS_VERTEX_ORDER {};",
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GetTessMode(profile.tess_primitive), GetTessSpacing(profile.tess_spacing),
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profile.tess_clockwise ? "CW" : "CCW");
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break;
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case Stage::Geometry:
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header += fmt::format("PRIMITIVE_IN {};"
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"PRIMITIVE_OUT {};"
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