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graphics: support RDNA2 custom pixel interpolation

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Co-authored-by: Senaxx <Senaxx@users.noreply.github.com>
This commit is contained in:
nmzik
2026-08-21 23:33:40 +02:00
parent 17c2b4cc7d
commit 5e64efce4f
14 changed files with 414 additions and 28 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterModule.cpp
+25 -2
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@@ -441,6 +441,8 @@ uint32_t BuiltInForInput(IR::StageInputKind kind) {
case IR::StageInputKind::InstanceIndex: return BuiltInInstanceIndex;
case IR::StageInputKind::FragCoord: return BuiltInFragCoord;
case IR::StageInputKind::FrontFacing: return BuiltInFrontFacing;
case IR::StageInputKind::BaryCoordSmooth: return BuiltInBaryCoordKHR;
case IR::StageInputKind::BaryCoordNoPerspective: return BuiltInBaryCoordNoPerspKHR;
case IR::StageInputKind::WorkgroupId: return BuiltInWorkgroupId;
case IR::StageInputKind::LocalInvocationId: return BuiltInLocalInvocationId;
case IR::StageInputKind::LocalInvocationIndex: return BuiltInLocalInvocationIndex;
@@ -464,11 +466,14 @@ void AddInputAnnotationsAndNames(EmitterState& state) {
state.builder.AddName(input.variable_id, input.debug_name.c_str());
if (input.kind == IR::StageInputKind::Parameter) {
const auto flat = PixelParameterIsFlat(state, input.location);
if (flat) {
if (input.per_vertex) {
state.builder.AddAnnotation(
{OpDecorate, input.variable_id, DecorationPerVertexKHR});
} else if (flat) {
state.builder.AddAnnotation({OpDecorate, input.variable_id, DecorationFlat});
}
if (state.stage == ShaderType::Pixel && state.input_info.pixel->ps_no_perspective &&
!flat) {
!flat && !input.per_vertex) {
state.builder.AddAnnotation(
{OpDecorate, input.variable_id, DecorationNoPerspective});
}
@@ -625,6 +630,16 @@ void DefineModule(EmitterState& state) {
state.builder.RequireCapability(CapabilityComputeDerivativeGroupQuadsKHR);
state.builder.RequireExtension("SPV_KHR_compute_shader_derivatives");
}
const bool fragment_barycentric =
state.stage == ShaderType::Pixel &&
std::any_of(state.inputs.begin(), state.inputs.end(), [](const InputBinding& input) {
return input.per_vertex || input.kind == IR::StageInputKind::BaryCoordSmooth ||
input.kind == IR::StageInputKind::BaryCoordNoPerspective;
});
if (fragment_barycentric) {
state.builder.RequireCapability(CapabilityFragmentBarycentricKHR);
state.builder.RequireExtension("SPV_KHR_fragment_shader_barycentric");
}
state.builder.RequireExtension("SPV_KHR_float_controls");
state.builder.AddMemoryModel({AddressingModelLogical, MemoryModelGLSL450});
state.builder.AddEntryPoint(ExecutionModelForStage(state.stage), state.main_func, "main",
@@ -689,6 +704,10 @@ void DefineModule(EmitterState& state) {
case IR::StageInputKind::FragCoord:
ptr_type = TypePointer(state, StorageClassInput, TypeF32Vector(state, 4));
break;
case IR::StageInputKind::BaryCoordSmooth:
case IR::StageInputKind::BaryCoordNoPerspective:
ptr_type = TypePointer(state, StorageClassInput, TypeF32Vector(state, 3));
break;
case IR::StageInputKind::FrontFacing:
ptr_type = TypePointer(state, StorageClassInput, TypeBool(state));
break;
@@ -697,6 +716,10 @@ void DefineModule(EmitterState& state) {
const auto kind = VertexParameterScalarKind(state, input.location);
const auto components = VertexParameterComponentCount(state, input);
ptr_type = VertexParameterInputPointerType(state, kind, components);
} else if (input.per_vertex) {
const auto array_type = state.builder.Type(
OpTypeArray, {TypeF32Vector(state, 4), ConstantU32(state, 3)});
ptr_type = TypePointer(state, StorageClassInput, array_type);
} else {
ptr_type = TypePointer(state, StorageClassInput, TypeF32Vector(state, 4));
}