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shader: support quad tessellation domains and factor routing

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Çağatay Güçlü
2026-10-28 22:09:39 +01:00
committed by nmzik
parent a8e3c29b2e
commit 128c938514
2 changed files with 49 additions and 25 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterTessellation.cpp
+11 -7
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@@ -29,12 +29,14 @@ uint32_t TessellationPointer(ValueEmitContext& ctx, const IR::Inst& inst) {
const auto pointer = state.builder.AllocateId();
if (kind == Attribute::Factor) {
EXIT_NOT_IMPLEMENTED(!inst.Arg(1).IsImmediate());
const auto index = inst.Arg(1).U32() / 4u;
const auto outer = index < 3u;
EXIT_NOT_IMPLEMENTED(index >= 4u);
const auto index = inst.Arg(1).U32() / 4u;
const bool quad = tess.domain == 2u;
const auto outer_count = quad ? 4u : 3u;
const bool outer = index < outer_count;
EXIT_NOT_IMPLEMENTED(index >= (quad ? 6u : 4u));
state.builder.AddFunction(spv::OpAccessChain, TypePointer(state, storage, TypeF32(state)),
pointer, outer ? variable : state.tess_inner_variable,
ConstantU32(state, outer ? index : index - 3u));
ConstantU32(state, outer ? index : index - outer_count));
return pointer;
}
auto address = ctx.Arg(inst, 1);
@@ -128,8 +130,8 @@ void DefineTessellationInterfaces(EmitterState& state) {
void DefineTessellationExecutionModes(EmitterState& state) {
const auto& tess = state.input_info.vertex->tess;
// CxVgtTfParam: triangles, integer or fractional-odd partitioning, clockwise output.
EXIT_NOT_IMPLEMENTED(tess.domain != 1u ||
// Triangle or quad domain, integer or fractional-odd partitioning, clockwise output.
EXIT_NOT_IMPLEMENTED((tess.domain != 1u && tess.domain != 2u) ||
(tess.partitioning != 0u && tess.partitioning != 2u) ||
tess.output_topology != 2u);
state.builder.RequireCapability(spv::CapabilityTessellation);
@@ -137,7 +139,9 @@ void DefineTessellationExecutionModes(EmitterState& state) {
state.builder.AddExecutionMode(state.main_func, spv::ExecutionModeOutputVertices,
tess.output_control_points);
} else {
state.builder.AddExecutionMode(state.main_func, spv::ExecutionModeTriangles);
state.builder.AddExecutionMode(state.main_func, tess.domain == 1u
? spv::ExecutionModeTriangles
: spv::ExecutionModeQuads);
state.builder.AddExecutionMode(
state.main_func, tess.partitioning == 0u ? spv::ExecutionModeSpacingEqual
: spv::ExecutionModeSpacingFractionalOdd);