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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
View File
@@ -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);
}
}
tests/ShaderRecompilerComputeTests.cpp
+8 -3
View File
@@ -47480,7 +47480,8 @@ bool HasPatchInterface(const std::string &assembly, const std::string &storage,
std::string::npos;
}
void CheckTessellationProgram(const char *name, u32 ls_stride, u32 hs_stride, u32 domain = 1) {
void CheckTessellationProgram(const char *name, u32 ls_stride, u32 hs_stride, u32 domain = 1,
u32 output_topology = 2) {
using namespace ShaderRecompiler;
const bool quad = domain == 2;
const u32 control_points = quad ? 4 : 3;
@@ -47584,7 +47585,7 @@ void CheckTessellationProgram(const char *name, u32 ls_stride, u32 hs_stride, u3
.output_control_points = control_points,
.domain = domain,
.partitioning = 2,
.output_topology = 2};
.output_topology = output_topology};
AnalyzeTessellationPrograms(local, control, tess);
Require(name, "decoded interface",
tess.ls_stride == ls_stride && tess.hs_stride == hs_stride,
@@ -47639,7 +47640,10 @@ void CheckTessellationProgram(const char *name, u32 ls_stride, u32 hs_stride, u3
ds.assembly.find("TessCoord") != std::string::npos &&
ds.assembly.find(quad ? "Quads" : "Triangles") != std::string::npos &&
ds.assembly.find("SpacingFractionalOdd") != std::string::npos &&
ds.assembly.find("VertexOrderCw") != std::string::npos,
ds.assembly.find(output_topology == 2 ? "VertexOrderCw" : "VertexOrderCcw") !=
std::string::npos &&
ds.assembly.find(output_topology == 2 ? "VertexOrderCcw" : "VertexOrderCw") ==
std::string::npos,
"TES must preserve guest domain, partitioning, and winding");
std::printf("[host] %-32s ok\n", name);
}
@@ -47816,6 +47820,7 @@ void CheckTessellationPrograms() {
CheckTessellationProgram("TessellationShiftedStride", 124, 128);
CheckTessellationProgram("TessellationMultipliedStride", 108, 112);
CheckTessellationProgram("TessellationQuadFactors", 36, 128, 2);
CheckTessellationProgram("TessellationCounterclockwiseQuads", 36, 128, 2, 3);
CheckTessellationProgram("TessellationMaskedControlPoint", 32, 256, 2);
CheckTessellationPatchConstants();
}