Ryujinx/Ryujinx.Graphics.Shader/CodeGen/Spirv/Declarations.cs

785 lines
36 KiB
C#

using Ryujinx.Common;
using Ryujinx.Graphics.Shader.StructuredIr;
using Ryujinx.Graphics.Shader.Translation;
using Spv.Generator;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using static Spv.Specification;
namespace Ryujinx.Graphics.Shader.CodeGen.Spirv
{
static class Declarations
{
// At least 16 attributes are guaranteed by the spec.
public const int MaxAttributes = 16;
private static readonly string[] StagePrefixes = new string[] { "cp", "vp", "tcp", "tep", "gp", "fp" };
public static void DeclareParameters(CodeGenContext context, StructuredFunction function)
{
DeclareParameters(context, function.InArguments, 0);
DeclareParameters(context, function.OutArguments, function.InArguments.Length);
}
private static void DeclareParameters(CodeGenContext context, IEnumerable<AggregateType> argTypes, int argIndex)
{
foreach (var argType in argTypes)
{
var argPointerType = context.TypePointer(StorageClass.Function, context.GetType(argType));
var spvArg = context.FunctionParameter(argPointerType);
context.DeclareArgument(argIndex++, spvArg);
}
}
public static void DeclareLocals(CodeGenContext context, StructuredFunction function)
{
foreach (AstOperand local in function.Locals)
{
var localPointerType = context.TypePointer(StorageClass.Function, context.GetType(local.VarType));
var spvLocal = context.Variable(localPointerType, StorageClass.Function);
context.AddLocalVariable(spvLocal);
context.DeclareLocal(local, spvLocal);
}
var ivector2Type = context.TypeVector(context.TypeS32(), 2);
var coordTempPointerType = context.TypePointer(StorageClass.Function, ivector2Type);
var coordTemp = context.Variable(coordTempPointerType, StorageClass.Function);
context.AddLocalVariable(coordTemp);
context.CoordTemp = coordTemp;
}
public static void DeclareLocalForArgs(CodeGenContext context, List<StructuredFunction> functions)
{
for (int funcIndex = 0; funcIndex < functions.Count; funcIndex++)
{
StructuredFunction function = functions[funcIndex];
Instruction[] locals = new Instruction[function.InArguments.Length];
for (int i = 0; i < function.InArguments.Length; i++)
{
var type = function.GetArgumentType(i);
var localPointerType = context.TypePointer(StorageClass.Function, context.GetType(type));
var spvLocal = context.Variable(localPointerType, StorageClass.Function);
context.AddLocalVariable(spvLocal);
locals[i] = spvLocal;
}
context.DeclareLocalForArgs(funcIndex, locals);
}
}
public static void DeclareAll(CodeGenContext context, StructuredProgramInfo info)
{
if (context.Config.Stage == ShaderStage.Compute)
{
int localMemorySize = BitUtils.DivRoundUp(context.Config.GpuAccessor.QueryComputeLocalMemorySize(), 4);
if (localMemorySize != 0)
{
DeclareLocalMemory(context, localMemorySize);
}
int sharedMemorySize = BitUtils.DivRoundUp(context.Config.GpuAccessor.QueryComputeSharedMemorySize(), 4);
if (sharedMemorySize != 0)
{
DeclareSharedMemory(context, sharedMemorySize);
}
}
else if (context.Config.LocalMemorySize != 0)
{
int localMemorySize = BitUtils.DivRoundUp(context.Config.LocalMemorySize, 4);
DeclareLocalMemory(context, localMemorySize);
}
DeclareSupportBuffer(context);
DeclareUniformBuffers(context, context.Config.GetConstantBufferDescriptors());
DeclareStorageBuffers(context, context.Config.GetStorageBufferDescriptors());
DeclareSamplers(context, context.Config.GetTextureDescriptors());
DeclareImages(context, context.Config.GetImageDescriptors());
DeclareInputAttributes(context, info, perPatch: false);
DeclareOutputAttributes(context, info, perPatch: false);
DeclareInputAttributes(context, info, perPatch: true);
DeclareOutputAttributes(context, info, perPatch: true);
}
private static void DeclareLocalMemory(CodeGenContext context, int size)
{
context.LocalMemory = DeclareMemory(context, StorageClass.Private, size);
}
private static void DeclareSharedMemory(CodeGenContext context, int size)
{
context.SharedMemory = DeclareMemory(context, StorageClass.Workgroup, size);
}
private static Instruction DeclareMemory(CodeGenContext context, StorageClass storage, int size)
{
var arrayType = context.TypeArray(context.TypeU32(), context.Constant(context.TypeU32(), size));
var pointerType = context.TypePointer(storage, arrayType);
var variable = context.Variable(pointerType, storage);
context.AddGlobalVariable(variable);
return variable;
}
private static void DeclareSupportBuffer(CodeGenContext context)
{
if (!context.Config.Stage.SupportsRenderScale() && !(context.Config.LastInVertexPipeline && context.Config.GpuAccessor.QueryViewportTransformDisable()))
{
return;
}
var isBgraArrayType = context.TypeArray(context.TypeU32(), context.Constant(context.TypeU32(), SupportBuffer.FragmentIsBgraCount));
var viewportInverseVectorType = context.TypeVector(context.TypeFP32(), 4);
var renderScaleArrayType = context.TypeArray(context.TypeFP32(), context.Constant(context.TypeU32(), SupportBuffer.RenderScaleMaxCount));
context.Decorate(isBgraArrayType, Decoration.ArrayStride, (LiteralInteger)SupportBuffer.FieldSize);
context.Decorate(renderScaleArrayType, Decoration.ArrayStride, (LiteralInteger)SupportBuffer.FieldSize);
var supportBufferStructType = context.TypeStruct(false, context.TypeU32(), isBgraArrayType, viewportInverseVectorType, context.TypeS32(), renderScaleArrayType);
context.MemberDecorate(supportBufferStructType, 0, Decoration.Offset, (LiteralInteger)SupportBuffer.FragmentAlphaTestOffset);
context.MemberDecorate(supportBufferStructType, 1, Decoration.Offset, (LiteralInteger)SupportBuffer.FragmentIsBgraOffset);
context.MemberDecorate(supportBufferStructType, 2, Decoration.Offset, (LiteralInteger)SupportBuffer.ViewportInverseOffset);
context.MemberDecorate(supportBufferStructType, 3, Decoration.Offset, (LiteralInteger)SupportBuffer.FragmentRenderScaleCountOffset);
context.MemberDecorate(supportBufferStructType, 4, Decoration.Offset, (LiteralInteger)SupportBuffer.GraphicsRenderScaleOffset);
context.Decorate(supportBufferStructType, Decoration.Block);
var supportBufferPointerType = context.TypePointer(StorageClass.Uniform, supportBufferStructType);
var supportBufferVariable = context.Variable(supportBufferPointerType, StorageClass.Uniform);
context.Decorate(supportBufferVariable, Decoration.DescriptorSet, (LiteralInteger)0);
context.Decorate(supportBufferVariable, Decoration.Binding, (LiteralInteger)0);
context.AddGlobalVariable(supportBufferVariable);
context.SupportBuffer = supportBufferVariable;
}
private static void DeclareUniformBuffers(CodeGenContext context, BufferDescriptor[] descriptors)
{
if (descriptors.Length == 0)
{
return;
}
uint ubSize = Constants.ConstantBufferSize / 16;
var ubArrayType = context.TypeArray(context.TypeVector(context.TypeFP32(), 4), context.Constant(context.TypeU32(), ubSize), true);
context.Decorate(ubArrayType, Decoration.ArrayStride, (LiteralInteger)16);
var ubStructType = context.TypeStruct(true, ubArrayType);
context.Decorate(ubStructType, Decoration.Block);
context.MemberDecorate(ubStructType, 0, Decoration.Offset, (LiteralInteger)0);
if (context.Config.UsedFeatures.HasFlag(FeatureFlags.CbIndexing))
{
int count = descriptors.Max(x => x.Slot) + 1;
var ubStructArrayType = context.TypeArray(ubStructType, context.Constant(context.TypeU32(), count));
var ubPointerType = context.TypePointer(StorageClass.Uniform, ubStructArrayType);
var ubVariable = context.Variable(ubPointerType, StorageClass.Uniform);
context.Name(ubVariable, $"{GetStagePrefix(context.Config.Stage)}_u");
context.Decorate(ubVariable, Decoration.DescriptorSet, (LiteralInteger)0);
context.Decorate(ubVariable, Decoration.Binding, (LiteralInteger)context.Config.FirstConstantBufferBinding);
context.AddGlobalVariable(ubVariable);
context.UniformBuffersArray = ubVariable;
}
else
{
var ubPointerType = context.TypePointer(StorageClass.Uniform, ubStructType);
foreach (var descriptor in descriptors)
{
var ubVariable = context.Variable(ubPointerType, StorageClass.Uniform);
context.Name(ubVariable, $"{GetStagePrefix(context.Config.Stage)}_c{descriptor.Slot}");
context.Decorate(ubVariable, Decoration.DescriptorSet, (LiteralInteger)0);
context.Decorate(ubVariable, Decoration.Binding, (LiteralInteger)descriptor.Binding);
context.AddGlobalVariable(ubVariable);
context.UniformBuffers.Add(descriptor.Slot, ubVariable);
}
}
}
private static void DeclareStorageBuffers(CodeGenContext context, BufferDescriptor[] descriptors)
{
if (descriptors.Length == 0)
{
return;
}
int setIndex = context.Config.Options.TargetApi == TargetApi.Vulkan ? 1 : 0;
int count = descriptors.Max(x => x.Slot) + 1;
var sbArrayType = context.TypeRuntimeArray(context.TypeU32());
context.Decorate(sbArrayType, Decoration.ArrayStride, (LiteralInteger)4);
var sbStructType = context.TypeStruct(true, sbArrayType);
context.Decorate(sbStructType, Decoration.BufferBlock);
context.MemberDecorate(sbStructType, 0, Decoration.Offset, (LiteralInteger)0);
var sbStructArrayType = context.TypeArray(sbStructType, context.Constant(context.TypeU32(), count));
var sbPointerType = context.TypePointer(StorageClass.Uniform, sbStructArrayType);
var sbVariable = context.Variable(sbPointerType, StorageClass.Uniform);
context.Name(sbVariable, $"{GetStagePrefix(context.Config.Stage)}_s");
context.Decorate(sbVariable, Decoration.DescriptorSet, (LiteralInteger)setIndex);
context.Decorate(sbVariable, Decoration.Binding, (LiteralInteger)context.Config.FirstStorageBufferBinding);
context.AddGlobalVariable(sbVariable);
context.StorageBuffersArray = sbVariable;
}
private static void DeclareSamplers(CodeGenContext context, TextureDescriptor[] descriptors)
{
foreach (var descriptor in descriptors)
{
var meta = new TextureMeta(descriptor.CbufSlot, descriptor.HandleIndex, descriptor.Format);
if (context.Samplers.ContainsKey(meta))
{
continue;
}
int setIndex = context.Config.Options.TargetApi == TargetApi.Vulkan ? 2 : 0;
var dim = (descriptor.Type & SamplerType.Mask) switch
{
SamplerType.Texture1D => Dim.Dim1D,
SamplerType.Texture2D => Dim.Dim2D,
SamplerType.Texture3D => Dim.Dim3D,
SamplerType.TextureCube => Dim.Cube,
SamplerType.TextureBuffer => Dim.Buffer,
_ => throw new InvalidOperationException($"Invalid sampler type \"{descriptor.Type & SamplerType.Mask}\".")
};
var imageType = context.TypeImage(
context.TypeFP32(),
dim,
descriptor.Type.HasFlag(SamplerType.Shadow),
descriptor.Type.HasFlag(SamplerType.Array),
descriptor.Type.HasFlag(SamplerType.Multisample),
1,
ImageFormat.Unknown);
var nameSuffix = meta.CbufSlot < 0 ? $"_tcb_{meta.Handle:X}" : $"_cb{meta.CbufSlot}_{meta.Handle:X}";
var sampledImageType = context.TypeSampledImage(imageType);
var sampledImagePointerType = context.TypePointer(StorageClass.UniformConstant, sampledImageType);
var sampledImageVariable = context.Variable(sampledImagePointerType, StorageClass.UniformConstant);
context.Samplers.Add(meta, (imageType, sampledImageType, sampledImageVariable));
context.SamplersTypes.Add(meta, descriptor.Type);
context.Name(sampledImageVariable, $"{GetStagePrefix(context.Config.Stage)}_tex{nameSuffix}");
context.Decorate(sampledImageVariable, Decoration.DescriptorSet, (LiteralInteger)setIndex);
context.Decorate(sampledImageVariable, Decoration.Binding, (LiteralInteger)descriptor.Binding);
context.AddGlobalVariable(sampledImageVariable);
}
}
private static void DeclareImages(CodeGenContext context, TextureDescriptor[] descriptors)
{
foreach (var descriptor in descriptors)
{
var meta = new TextureMeta(descriptor.CbufSlot, descriptor.HandleIndex, descriptor.Format);
if (context.Images.ContainsKey(meta))
{
continue;
}
int setIndex = context.Config.Options.TargetApi == TargetApi.Vulkan ? 3 : 0;
var dim = GetDim(descriptor.Type);
var imageType = context.TypeImage(
context.GetType(meta.Format.GetComponentType()),
dim,
descriptor.Type.HasFlag(SamplerType.Shadow),
descriptor.Type.HasFlag(SamplerType.Array),
descriptor.Type.HasFlag(SamplerType.Multisample),
AccessQualifier.ReadWrite,
GetImageFormat(meta.Format));
var nameSuffix = meta.CbufSlot < 0 ?
$"_tcb_{meta.Handle:X}_{meta.Format.ToGlslFormat()}" :
$"_cb{meta.CbufSlot}_{meta.Handle:X}_{meta.Format.ToGlslFormat()}";
var imagePointerType = context.TypePointer(StorageClass.UniformConstant, imageType);
var imageVariable = context.Variable(imagePointerType, StorageClass.UniformConstant);
context.Images.Add(meta, (imageType, imageVariable));
context.Name(imageVariable, $"{GetStagePrefix(context.Config.Stage)}_img{nameSuffix}");
context.Decorate(imageVariable, Decoration.DescriptorSet, (LiteralInteger)setIndex);
context.Decorate(imageVariable, Decoration.Binding, (LiteralInteger)descriptor.Binding);
if (descriptor.Flags.HasFlag(TextureUsageFlags.ImageCoherent))
{
context.Decorate(imageVariable, Decoration.Coherent);
}
context.AddGlobalVariable(imageVariable);
}
}
private static Dim GetDim(SamplerType type)
{
return (type & SamplerType.Mask) switch
{
SamplerType.Texture1D => Dim.Dim1D,
SamplerType.Texture2D => Dim.Dim2D,
SamplerType.Texture3D => Dim.Dim3D,
SamplerType.TextureCube => Dim.Cube,
SamplerType.TextureBuffer => Dim.Buffer,
_ => throw new ArgumentException($"Invalid sampler type \"{type & SamplerType.Mask}\".")
};
}
private static ImageFormat GetImageFormat(TextureFormat format)
{
return format switch
{
TextureFormat.Unknown => ImageFormat.Unknown,
TextureFormat.R8Unorm => ImageFormat.R8,
TextureFormat.R8Snorm => ImageFormat.R8Snorm,
TextureFormat.R8Uint => ImageFormat.R8ui,
TextureFormat.R8Sint => ImageFormat.R8i,
TextureFormat.R16Float => ImageFormat.R16f,
TextureFormat.R16Unorm => ImageFormat.R16,
TextureFormat.R16Snorm => ImageFormat.R16Snorm,
TextureFormat.R16Uint => ImageFormat.R16ui,
TextureFormat.R16Sint => ImageFormat.R16i,
TextureFormat.R32Float => ImageFormat.R32f,
TextureFormat.R32Uint => ImageFormat.R32ui,
TextureFormat.R32Sint => ImageFormat.R32i,
TextureFormat.R8G8Unorm => ImageFormat.Rg8,
TextureFormat.R8G8Snorm => ImageFormat.Rg8Snorm,
TextureFormat.R8G8Uint => ImageFormat.Rg8ui,
TextureFormat.R8G8Sint => ImageFormat.Rg8i,
TextureFormat.R16G16Float => ImageFormat.Rg16f,
TextureFormat.R16G16Unorm => ImageFormat.Rg16,
TextureFormat.R16G16Snorm => ImageFormat.Rg16Snorm,
TextureFormat.R16G16Uint => ImageFormat.Rg16ui,
TextureFormat.R16G16Sint => ImageFormat.Rg16i,
TextureFormat.R32G32Float => ImageFormat.Rg32f,
TextureFormat.R32G32Uint => ImageFormat.Rg32ui,
TextureFormat.R32G32Sint => ImageFormat.Rg32i,
TextureFormat.R8G8B8A8Unorm => ImageFormat.Rgba8,
TextureFormat.R8G8B8A8Snorm => ImageFormat.Rgba8Snorm,
TextureFormat.R8G8B8A8Uint => ImageFormat.Rgba8ui,
TextureFormat.R8G8B8A8Sint => ImageFormat.Rgba8i,
TextureFormat.R16G16B16A16Float => ImageFormat.Rgba16f,
TextureFormat.R16G16B16A16Unorm => ImageFormat.Rgba16,
TextureFormat.R16G16B16A16Snorm => ImageFormat.Rgba16Snorm,
TextureFormat.R16G16B16A16Uint => ImageFormat.Rgba16ui,
TextureFormat.R16G16B16A16Sint => ImageFormat.Rgba16i,
TextureFormat.R32G32B32A32Float => ImageFormat.Rgba32f,
TextureFormat.R32G32B32A32Uint => ImageFormat.Rgba32ui,
TextureFormat.R32G32B32A32Sint => ImageFormat.Rgba32i,
TextureFormat.R10G10B10A2Unorm => ImageFormat.Rgb10A2,
TextureFormat.R10G10B10A2Uint => ImageFormat.Rgb10a2ui,
TextureFormat.R11G11B10Float => ImageFormat.R11fG11fB10f,
_ => throw new ArgumentException($"Invalid texture format \"{format}\".")
};
}
private static void DeclareInputAttributes(CodeGenContext context, StructuredProgramInfo info, bool perPatch)
{
bool iaIndexing = context.Config.UsedFeatures.HasFlag(FeatureFlags.IaIndexing);
if (iaIndexing && !perPatch)
{
var attrType = context.TypeVector(context.TypeFP32(), (LiteralInteger)4);
attrType = context.TypeArray(attrType, context.Constant(context.TypeU32(), (LiteralInteger)MaxAttributes));
if (context.Config.Stage == ShaderStage.Geometry)
{
attrType = context.TypeArray(attrType, context.Constant(context.TypeU32(), (LiteralInteger)context.InputVertices));
}
var spvType = context.TypePointer(StorageClass.Input, attrType);
var spvVar = context.Variable(spvType, StorageClass.Input);
if (context.Config.PassthroughAttributes != 0 && context.Config.GpuAccessor.QueryHostSupportsGeometryShaderPassthrough())
{
context.Decorate(spvVar, Decoration.PassthroughNV);
}
context.Decorate(spvVar, Decoration.Location, (LiteralInteger)0);
context.AddGlobalVariable(spvVar);
context.InputsArray = spvVar;
}
var inputs = perPatch ? info.InputsPerPatch : info.Inputs;
foreach (int attr in inputs)
{
if (!AttributeInfo.Validate(context.Config, attr, isOutAttr: false, perPatch))
{
continue;
}
bool isUserAttr = attr >= AttributeConsts.UserAttributeBase && attr < AttributeConsts.UserAttributeEnd;
if (iaIndexing && isUserAttr && !perPatch)
{
continue;
}
PixelImap iq = PixelImap.Unused;
if (context.Config.Stage == ShaderStage.Fragment)
{
if (attr >= AttributeConsts.UserAttributeBase && attr < AttributeConsts.UserAttributeEnd)
{
iq = context.Config.ImapTypes[(attr - AttributeConsts.UserAttributeBase) / 16].GetFirstUsedType();
}
else
{
AttributeInfo attrInfo = AttributeInfo.From(context.Config, attr, isOutAttr: false);
AggregateType elemType = attrInfo.Type & AggregateType.ElementTypeMask;
if (attrInfo.IsBuiltin && (elemType == AggregateType.S32 || elemType == AggregateType.U32))
{
iq = PixelImap.Constant;
}
}
}
DeclareInputOrOutput(context, attr, perPatch, isOutAttr: false, iq);
}
}
private static void DeclareOutputAttributes(CodeGenContext context, StructuredProgramInfo info, bool perPatch)
{
bool oaIndexing = context.Config.UsedFeatures.HasFlag(FeatureFlags.OaIndexing);
if (oaIndexing && !perPatch)
{
var attrType = context.TypeVector(context.TypeFP32(), (LiteralInteger)4);
attrType = context.TypeArray(attrType, context.Constant(context.TypeU32(), (LiteralInteger)MaxAttributes));
if (context.Config.Stage == ShaderStage.TessellationControl)
{
attrType = context.TypeArray(attrType, context.Constant(context.TypeU32(), context.Config.ThreadsPerInputPrimitive));
}
var spvType = context.TypePointer(StorageClass.Output, attrType);
var spvVar = context.Variable(spvType, StorageClass.Output);
context.Decorate(spvVar, Decoration.Location, (LiteralInteger)0);
context.AddGlobalVariable(spvVar);
context.OutputsArray = spvVar;
}
var outputs = perPatch ? info.OutputsPerPatch : info.Outputs;
foreach (int attr in outputs)
{
if (!AttributeInfo.Validate(context.Config, attr, isOutAttr: true, perPatch))
{
continue;
}
bool isUserAttr = attr >= AttributeConsts.UserAttributeBase && attr < AttributeConsts.UserAttributeEnd;
if (oaIndexing && isUserAttr && !perPatch)
{
continue;
}
DeclareOutputAttribute(context, attr, perPatch);
}
if (context.Config.Stage == ShaderStage.Vertex)
{
DeclareOutputAttribute(context, AttributeConsts.PositionX, perPatch: false);
}
}
private static void DeclareOutputAttribute(CodeGenContext context, int attr, bool perPatch)
{
DeclareInputOrOutput(context, attr, perPatch, isOutAttr: true);
}
public static void DeclareInvocationId(CodeGenContext context)
{
DeclareInputOrOutput(context, AttributeConsts.LaneId, perPatch: false, isOutAttr: false);
}
private static void DeclareInputOrOutput(CodeGenContext context, int attr, bool perPatch, bool isOutAttr, PixelImap iq = PixelImap.Unused)
{
bool isUserAttr = attr >= AttributeConsts.UserAttributeBase && attr < AttributeConsts.UserAttributeEnd;
if (isUserAttr && context.Config.TransformFeedbackEnabled && !perPatch &&
((isOutAttr && context.Config.LastInVertexPipeline) ||
(!isOutAttr && context.Config.Stage == ShaderStage.Fragment)))
{
DeclareTransformFeedbackInputOrOutput(context, attr, isOutAttr, iq);
return;
}
var dict = perPatch
? (isOutAttr ? context.OutputsPerPatch : context.InputsPerPatch)
: (isOutAttr ? context.Outputs : context.Inputs);
var attrInfo = perPatch
? AttributeInfo.FromPatch(context.Config, attr, isOutAttr)
: AttributeInfo.From(context.Config, attr, isOutAttr);
if (dict.ContainsKey(attrInfo.BaseValue))
{
return;
}
var storageClass = isOutAttr ? StorageClass.Output : StorageClass.Input;
var attrType = context.GetType(attrInfo.Type, attrInfo.Length);
bool builtInPassthrough = false;
if (AttributeInfo.IsArrayAttributeSpirv(context.Config.Stage, isOutAttr) && !perPatch && (!attrInfo.IsBuiltin || AttributeInfo.IsArrayBuiltIn(attr)))
{
int arraySize = context.Config.Stage == ShaderStage.Geometry ? context.InputVertices : 32;
attrType = context.TypeArray(attrType, context.Constant(context.TypeU32(), (LiteralInteger)arraySize));
if (context.Config.GpPassthrough && context.Config.GpuAccessor.QueryHostSupportsGeometryShaderPassthrough())
{
builtInPassthrough = true;
}
}
if (context.Config.Stage == ShaderStage.TessellationControl && isOutAttr && !perPatch)
{
attrType = context.TypeArray(attrType, context.Constant(context.TypeU32(), context.Config.ThreadsPerInputPrimitive));
}
var spvType = context.TypePointer(storageClass, attrType);
var spvVar = context.Variable(spvType, storageClass);
if (builtInPassthrough)
{
context.Decorate(spvVar, Decoration.PassthroughNV);
}
if (attrInfo.IsBuiltin)
{
if (perPatch)
{
context.Decorate(spvVar, Decoration.Patch);
}
if (context.Config.GpuAccessor.QueryHostReducedPrecision() && attr == AttributeConsts.PositionX && context.Config.Stage != ShaderStage.Fragment)
{
context.Decorate(spvVar, Decoration.Invariant);
}
context.Decorate(spvVar, Decoration.BuiltIn, (LiteralInteger)GetBuiltIn(context, attrInfo.BaseValue));
if (context.Config.TransformFeedbackEnabled && context.Config.LastInVertexPipeline && isOutAttr)
{
var tfOutput = context.Info.GetTransformFeedbackOutput(attrInfo.BaseValue);
if (tfOutput.Valid)
{
context.Decorate(spvVar, Decoration.XfbBuffer, (LiteralInteger)tfOutput.Buffer);
context.Decorate(spvVar, Decoration.XfbStride, (LiteralInteger)tfOutput.Stride);
context.Decorate(spvVar, Decoration.Offset, (LiteralInteger)tfOutput.Offset);
}
}
}
else if (perPatch)
{
context.Decorate(spvVar, Decoration.Patch);
int location = context.Config.GetPerPatchAttributeLocation((attr - AttributeConsts.UserAttributePerPatchBase) / 16);
context.Decorate(spvVar, Decoration.Location, (LiteralInteger)location);
}
else if (isUserAttr)
{
int location = (attr - AttributeConsts.UserAttributeBase) / 16;
context.Decorate(spvVar, Decoration.Location, (LiteralInteger)location);
if (!isOutAttr &&
!perPatch &&
(context.Config.PassthroughAttributes & (1 << location)) != 0 &&
context.Config.GpuAccessor.QueryHostSupportsGeometryShaderPassthrough())
{
context.Decorate(spvVar, Decoration.PassthroughNV);
}
}
else if (attr >= AttributeConsts.FragmentOutputColorBase && attr < AttributeConsts.FragmentOutputColorEnd)
{
int location = (attr - AttributeConsts.FragmentOutputColorBase) / 16;
context.Decorate(spvVar, Decoration.Location, (LiteralInteger)location);
}
if (!isOutAttr)
{
switch (iq)
{
case PixelImap.Constant:
context.Decorate(spvVar, Decoration.Flat);
break;
case PixelImap.ScreenLinear:
context.Decorate(spvVar, Decoration.NoPerspective);
break;
}
}
context.AddGlobalVariable(spvVar);
dict.Add(attrInfo.BaseValue, spvVar);
}
private static void DeclareTransformFeedbackInputOrOutput(CodeGenContext context, int attr, bool isOutAttr, PixelImap iq = PixelImap.Unused)
{
var dict = isOutAttr ? context.Outputs : context.Inputs;
var attrInfo = AttributeInfo.From(context.Config, attr, isOutAttr);
bool hasComponent = true;
int component = (attr >> 2) & 3;
int components = 1;
var type = attrInfo.Type & AggregateType.ElementTypeMask;
if (context.Config.LastInPipeline && isOutAttr)
{
components = context.Info.GetTransformFeedbackOutputComponents(attr);
if (components > 1)
{
attr &= ~0xf;
type = components switch
{
2 => AggregateType.Vector2 | AggregateType.FP32,
3 => AggregateType.Vector3 | AggregateType.FP32,
4 => AggregateType.Vector4 | AggregateType.FP32,
_ => AggregateType.FP32
};
hasComponent = false;
}
}
if (dict.ContainsKey(attr))
{
return;
}
var storageClass = isOutAttr ? StorageClass.Output : StorageClass.Input;
var attrType = context.GetType(type, components);
if (AttributeInfo.IsArrayAttributeSpirv(context.Config.Stage, isOutAttr) && (!attrInfo.IsBuiltin || AttributeInfo.IsArrayBuiltIn(attr)))
{
int arraySize = context.Config.Stage == ShaderStage.Geometry ? context.InputVertices : 32;
attrType = context.TypeArray(attrType, context.Constant(context.TypeU32(), (LiteralInteger)arraySize));
}
if (context.Config.Stage == ShaderStage.TessellationControl && isOutAttr)
{
attrType = context.TypeArray(attrType, context.Constant(context.TypeU32(), context.Config.ThreadsPerInputPrimitive));
}
var spvType = context.TypePointer(storageClass, attrType);
var spvVar = context.Variable(spvType, storageClass);
Debug.Assert(attr >= AttributeConsts.UserAttributeBase && attr < AttributeConsts.UserAttributeEnd);
int location = (attr - AttributeConsts.UserAttributeBase) / 16;
context.Decorate(spvVar, Decoration.Location, (LiteralInteger)location);
if (hasComponent)
{
context.Decorate(spvVar, Decoration.Component, (LiteralInteger)component);
}
if (isOutAttr)
{
var tfOutput = context.Info.GetTransformFeedbackOutput(attr);
if (tfOutput.Valid)
{
context.Decorate(spvVar, Decoration.XfbBuffer, (LiteralInteger)tfOutput.Buffer);
context.Decorate(spvVar, Decoration.XfbStride, (LiteralInteger)tfOutput.Stride);
context.Decorate(spvVar, Decoration.Offset, (LiteralInteger)tfOutput.Offset);
}
}
else
{
if ((context.Config.PassthroughAttributes & (1 << location)) != 0 &&
context.Config.GpuAccessor.QueryHostSupportsGeometryShaderPassthrough())
{
context.Decorate(spvVar, Decoration.PassthroughNV);
}
switch (iq)
{
case PixelImap.Constant:
context.Decorate(spvVar, Decoration.Flat);
break;
case PixelImap.ScreenLinear:
context.Decorate(spvVar, Decoration.NoPerspective);
break;
}
}
context.AddGlobalVariable(spvVar);
dict.Add(attr, spvVar);
}
private static BuiltIn GetBuiltIn(CodeGenContext context, int attr)
{
return attr switch
{
AttributeConsts.TessLevelOuter0 => BuiltIn.TessLevelOuter,
AttributeConsts.TessLevelInner0 => BuiltIn.TessLevelInner,
AttributeConsts.Layer => BuiltIn.Layer,
AttributeConsts.ViewportIndex => BuiltIn.ViewportIndex,
AttributeConsts.PointSize => BuiltIn.PointSize,
AttributeConsts.PositionX => context.Config.Stage == ShaderStage.Fragment ? BuiltIn.FragCoord : BuiltIn.Position,
AttributeConsts.ClipDistance0 => BuiltIn.ClipDistance,
AttributeConsts.PointCoordX => BuiltIn.PointCoord,
AttributeConsts.TessCoordX => BuiltIn.TessCoord,
AttributeConsts.InstanceId => BuiltIn.InstanceId,
AttributeConsts.VertexId => BuiltIn.VertexId,
AttributeConsts.BaseInstance => BuiltIn.BaseInstance,
AttributeConsts.BaseVertex => BuiltIn.BaseVertex,
AttributeConsts.InstanceIndex => BuiltIn.InstanceIndex,
AttributeConsts.VertexIndex => BuiltIn.VertexIndex,
AttributeConsts.DrawIndex => BuiltIn.DrawIndex,
AttributeConsts.FrontFacing => BuiltIn.FrontFacing,
AttributeConsts.FragmentOutputDepth => BuiltIn.FragDepth,
AttributeConsts.ThreadKill => BuiltIn.HelperInvocation,
AttributeConsts.ThreadIdX => BuiltIn.LocalInvocationId,
AttributeConsts.CtaIdX => BuiltIn.WorkgroupId,
AttributeConsts.LaneId => BuiltIn.SubgroupLocalInvocationId,
AttributeConsts.InvocationId => BuiltIn.InvocationId,
AttributeConsts.PrimitiveId => BuiltIn.PrimitiveId,
AttributeConsts.PatchVerticesIn => BuiltIn.PatchVertices,
AttributeConsts.EqMask => BuiltIn.SubgroupEqMask,
AttributeConsts.GeMask => BuiltIn.SubgroupGeMask,
AttributeConsts.GtMask => BuiltIn.SubgroupGtMask,
AttributeConsts.LeMask => BuiltIn.SubgroupLeMask,
AttributeConsts.LtMask => BuiltIn.SubgroupLtMask,
AttributeConsts.SupportBlockViewInverseX => BuiltIn.Position,
AttributeConsts.SupportBlockViewInverseY => BuiltIn.Position,
_ => throw new ArgumentException($"Invalid attribute number 0x{attr:X}.")
};
}
private static string GetStagePrefix(ShaderStage stage)
{
return StagePrefixes[(int)stage];
}
}
}