graphics: support RDNA2 custom pixel interpolation

Co-authored-by: Senaxx <Senaxx@users.noreply.github.com>

src/graphics/shader/recompiler/backend/spirv/spirvEmitterInternal.h

@@ -47,6 +47,7 @@ enum : uint32_t {
 	CapabilityGroupNonUniformBallot          = 64,
 	CapabilityGroupNonUniformShuffle         = 65,
 	CapabilitySignedZeroInfNanPreserve       = 4466,
+	CapabilityFragmentBarycentricKHR         = 5284,
 	CapabilityComputeDerivativeGroupQuadsKHR = 5288,
 	StorageClassUniformConstant              = 0,
 	StorageClassInput                        = 1,
@@ -71,6 +72,7 @@ enum : uint32_t {
 	DecorationBinding       = 33,
 	DecorationDescriptorSet = 34,
 	DecorationOffset        = 35,
+	DecorationPerVertexKHR  = 5285,
 };
 
 enum : uint32_t {
@@ -86,6 +88,8 @@ enum : uint32_t {
 	BuiltInSubgroupLocalInvocationId = 41,
 	BuiltInVertexIndex               = 42,
 	BuiltInInstanceIndex             = 43,
+	BuiltInBaryCoordKHR              = 5286,
+	BuiltInBaryCoordNoPerspKHR       = 5287,
 };
 
 enum : uint32_t {
@@ -283,6 +287,7 @@ struct InputBinding {
 	uint32_t           component_count = 1;
 	uint32_t           variable_id     = 0;
 	std::string        debug_name;
+	bool               per_vertex = false;
 };
 
 struct OutputBinding {
@@ -564,6 +569,8 @@ uint32_t PixelParameterLocation(const EmitterState& state, uint32_t attr);
 
 bool PixelParameterIsFlat(const EmitterState& state, uint32_t attr);
 
+bool PixelParameterIsCustom(const EmitterState& state, uint32_t attr);
+
 VertexInputScalarKind VertexParameterScalarKind(const EmitterState& state, uint32_t location);
 
 uint32_t VertexParameterComponentCount(const EmitterState& state, const InputBinding& input);