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shader: preserve counterclockwise tessellation output

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Çağatay Güçlü authored and nmzik committed 2026-10-29 05:52:04 +01:00
1 parent 54b937c85f
commit 143f640706
2 files changed
+13 -6
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterTessellation.cpp
+5 -3
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@@ -130,10 +130,10 @@ void DefineTessellationInterfaces(EmitterState& state) {
void DefineTessellationExecutionModes(EmitterState& state) {
const auto& tess = state.input_info.vertex->tess;
// Triangle or quad domain, integer or fractional-odd partitioning, clockwise output.
// Triangle or quad domain, integer or fractional-odd partitioning, triangle output.
EXIT_NOT_IMPLEMENTED((tess.domain != 1u && tess.domain != 2u) ||
(tess.partitioning != 0u && tess.partitioning != 2u) ||
tess.output_topology != 2u);
(tess.output_topology != 2u && tess.output_topology != 3u));
state.builder.RequireCapability(spv::CapabilityTessellation);
if (state.program.stage == ShaderType::TessellationControl) {
state.builder.AddExecutionMode(state.main_func, spv::ExecutionModeOutputVertices,
@@ -145,7 +145,9 @@ void DefineTessellationExecutionModes(EmitterState& state) {
state.builder.AddExecutionMode(
state.main_func, tess.partitioning == 0u ? spv::ExecutionModeSpacingEqual
: spv::ExecutionModeSpacingFractionalOdd);
state.builder.AddExecutionMode(state.main_func, spv::ExecutionModeVertexOrderCw);
state.builder.AddExecutionMode(state.main_func, tess.output_topology == 2u
? spv::ExecutionModeVertexOrderCw
: spv::ExecutionModeVertexOrderCcw);
}
}