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

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using Ryujinx.Common;
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using Ryujinx.Graphics.Shader.StructuredIr;
using Ryujinx.Graphics.Shader.Translation;
using System;
using System.Linq;
namespace Ryujinx.Graphics.Shader.CodeGen.Glsl
{
static class Declarations
{
// At least 16 attributes are guaranteed by the spec.
public const int MaxAttributes = 16;
public static void Declare(CodeGenContext context, StructuredProgramInfo info)
{
context.AppendLine("#version 450 core");
context.AppendLine("#extension GL_ARB_gpu_shader_int64 : enable");
context.AppendLine("#extension GL_ARB_shader_ballot : enable");
context.AppendLine("#extension GL_ARB_shader_group_vote : enable");
context.AppendLine("#extension GL_EXT_shader_image_load_formatted : enable");
context.AppendLine("#extension GL_EXT_texture_shadow_lod : enable");
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if (context.Config.Stage == ShaderStage.Compute)
{
context.AppendLine("#extension GL_ARB_compute_shader : enable");
}
if (context.Config.GpPassthrough)
{
context.AppendLine("#extension GL_NV_geometry_shader_passthrough : enable");
}
context.AppendLine("#pragma optionNV(fastmath off)");
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context.AppendLine();
context.AppendLine($"const int {DefaultNames.UndefinedName} = 0;");
context.AppendLine();
if (context.Config.Stage == ShaderStage.Compute)
{
int localMemorySize = BitUtils.DivRoundUp(context.Config.GpuAccessor.QueryComputeLocalMemorySize(), 4);
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if (localMemorySize != 0)
{
string localMemorySizeStr = NumberFormatter.FormatInt(localMemorySize);
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context.AppendLine($"uint {DefaultNames.LocalMemoryName}[{localMemorySizeStr}];");
context.AppendLine();
}
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int sharedMemorySize = BitUtils.DivRoundUp(context.Config.GpuAccessor.QueryComputeSharedMemorySize(), 4);
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if (sharedMemorySize != 0)
{
string sharedMemorySizeStr = NumberFormatter.FormatInt(sharedMemorySize);
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context.AppendLine($"shared uint {DefaultNames.SharedMemoryName}[{sharedMemorySizeStr}];");
context.AppendLine();
}
}
else if (context.Config.LocalMemorySize != 0)
{
int localMemorySize = BitUtils.DivRoundUp(context.Config.LocalMemorySize, 4);
string localMemorySizeStr = NumberFormatter.FormatInt(localMemorySize);
context.AppendLine($"uint {DefaultNames.LocalMemoryName}[{localMemorySizeStr}];");
context.AppendLine();
}
var cBufferDescriptors = context.Config.GetConstantBufferDescriptors();
if (cBufferDescriptors.Length != 0)
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{
DeclareUniforms(context, cBufferDescriptors);
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context.AppendLine();
}
var sBufferDescriptors = context.Config.GetStorageBufferDescriptors();
if (sBufferDescriptors.Length != 0)
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{
DeclareStorages(context, sBufferDescriptors);
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context.AppendLine();
}
var textureDescriptors = context.Config.GetTextureDescriptors();
if (textureDescriptors.Length != 0)
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{
DeclareSamplers(context, textureDescriptors);
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context.AppendLine();
}
var imageDescriptors = context.Config.GetImageDescriptors();
if (imageDescriptors.Length != 0)
{
DeclareImages(context, imageDescriptors);
context.AppendLine();
}
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if (context.Config.Stage != ShaderStage.Compute)
{
if (context.Config.Stage == ShaderStage.Geometry)
{
string inPrimitive = context.Config.GpuAccessor.QueryPrimitiveTopology().ToGlslString();
context.AppendLine($"layout ({inPrimitive}) in;");
if (context.Config.GpPassthrough)
{
context.AppendLine($"layout (passthrough) in gl_PerVertex");
context.EnterScope();
context.AppendLine("vec4 gl_Position;");
context.AppendLine("float gl_PointSize;");
context.AppendLine("float gl_ClipDistance[];");
context.LeaveScope(";");
}
else
{
string outPrimitive = context.Config.OutputTopology.ToGlslString();
int maxOutputVertices = context.Config.MaxOutputVertices;
context.AppendLine($"layout ({outPrimitive}, max_vertices = {maxOutputVertices}) out;");
}
context.AppendLine();
}
if (info.IAttributes.Count != 0 || context.Config.GpPassthrough)
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{
DeclareInputAttributes(context, info);
context.AppendLine();
}
if (info.OAttributes.Count != 0 || context.Config.Stage != ShaderStage.Fragment)
{
DeclareOutputAttributes(context, info);
context.AppendLine();
}
}
else
{
string localSizeX = NumberFormatter.FormatInt(context.Config.GpuAccessor.QueryComputeLocalSizeX());
string localSizeY = NumberFormatter.FormatInt(context.Config.GpuAccessor.QueryComputeLocalSizeY());
string localSizeZ = NumberFormatter.FormatInt(context.Config.GpuAccessor.QueryComputeLocalSizeZ());
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context.AppendLine(
"layout (" +
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$"local_size_x = {localSizeX}, " +
$"local_size_y = {localSizeY}, " +
$"local_size_z = {localSizeZ}) in;");
context.AppendLine();
}
bool isFragment = context.Config.Stage == ShaderStage.Fragment;
if (isFragment || context.Config.Stage == ShaderStage.Compute)
{
if (isFragment && context.Config.GpuAccessor.QueryEarlyZForce())
{
context.AppendLine("layout(early_fragment_tests) in;");
context.AppendLine();
}
if ((context.Config.UsedFeatures & (FeatureFlags.FragCoordXY | FeatureFlags.IntegerSampling)) != 0)
{
string stage = OperandManager.GetShaderStagePrefix(context.Config.Stage);
int scaleElements = context.Config.GetTextureDescriptors().Length + context.Config.GetImageDescriptors().Length;
if (isFragment)
{
scaleElements++; // Also includes render target scale, for gl_FragCoord.
}
DeclareSupportUniformBlock(context, isFragment, scaleElements);
if (context.Config.UsedFeatures.HasFlag(FeatureFlags.IntegerSampling))
{
AppendHelperFunction(context, $"Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/TexelFetchScale_{stage}.glsl");
context.AppendLine();
}
}
else if (isFragment)
{
DeclareSupportUniformBlock(context, true, 0);
}
}
if ((info.HelperFunctionsMask & HelperFunctionsMask.AtomicMinMaxS32Shared) != 0)
{
AppendHelperFunction(context, "Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/AtomicMinMaxS32Shared.glsl");
}
if ((info.HelperFunctionsMask & HelperFunctionsMask.AtomicMinMaxS32Storage) != 0)
{
AppendHelperFunction(context, "Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/AtomicMinMaxS32Storage.glsl");
}
if ((info.HelperFunctionsMask & HelperFunctionsMask.MultiplyHighS32) != 0)
{
AppendHelperFunction(context, "Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/MultiplyHighS32.glsl");
}
if ((info.HelperFunctionsMask & HelperFunctionsMask.MultiplyHighU32) != 0)
{
AppendHelperFunction(context, "Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/MultiplyHighU32.glsl");
}
if ((info.HelperFunctionsMask & HelperFunctionsMask.Shuffle) != 0)
{
AppendHelperFunction(context, "Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/Shuffle.glsl");
}
if ((info.HelperFunctionsMask & HelperFunctionsMask.ShuffleDown) != 0)
{
AppendHelperFunction(context, "Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/ShuffleDown.glsl");
}
if ((info.HelperFunctionsMask & HelperFunctionsMask.ShuffleUp) != 0)
{
AppendHelperFunction(context, "Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/ShuffleUp.glsl");
}
if ((info.HelperFunctionsMask & HelperFunctionsMask.ShuffleXor) != 0)
{
AppendHelperFunction(context, "Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/ShuffleXor.glsl");
}
if ((info.HelperFunctionsMask & HelperFunctionsMask.SwizzleAdd) != 0)
{
AppendHelperFunction(context, "Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/SwizzleAdd.glsl");
}
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}
public static void DeclareLocals(CodeGenContext context, StructuredFunction function)
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{
foreach (AstOperand decl in function.Locals)
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{
string name = context.OperandManager.DeclareLocal(decl);
context.AppendLine(GetVarTypeName(decl.VarType) + " " + name + ";");
}
}
public static string GetVarTypeName(VariableType type)
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{
switch (type)
{
case VariableType.Bool: return "bool";
case VariableType.F32: return "precise float";
case VariableType.F64: return "double";
case VariableType.None: return "void";
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case VariableType.S32: return "int";
case VariableType.U32: return "uint";
}
throw new ArgumentException($"Invalid variable type \"{type}\".");
}
private static void DeclareUniforms(CodeGenContext context, BufferDescriptor[] descriptors)
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{
string ubSize = "[" + NumberFormatter.FormatInt(Constants.ConstantBufferSize / 16) + "]";
if (context.Config.UsedFeatures.HasFlag(FeatureFlags.CbIndexing))
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{
string ubName = OperandManager.GetShaderStagePrefix(context.Config.Stage);
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ubName += "_" + DefaultNames.UniformNamePrefix;
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string blockName = $"{ubName}_{DefaultNames.BlockSuffix}";
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context.AppendLine($"layout (binding = {context.Config.FirstConstantBufferBinding}, std140) uniform {blockName}");
context.EnterScope();
context.AppendLine("vec4 " + DefaultNames.DataName + ubSize + ";");
context.LeaveScope($" {ubName}[{NumberFormatter.FormatInt(descriptors.Max(x => x.Slot) + 1)}];");
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}
else
{
foreach (var descriptor in descriptors)
{
string ubName = OperandManager.GetShaderStagePrefix(context.Config.Stage);
ubName += "_" + DefaultNames.UniformNamePrefix + descriptor.Slot;
context.AppendLine($"layout (binding = {descriptor.Binding}, std140) uniform {ubName}");
context.EnterScope();
context.AppendLine("vec4 " + OperandManager.GetUbName(context.Config.Stage, descriptor.Slot, false) + ubSize + ";");
context.LeaveScope(";");
}
}
}
private static void DeclareStorages(CodeGenContext context, BufferDescriptor[] descriptors)
{
string sbName = OperandManager.GetShaderStagePrefix(context.Config.Stage);
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sbName += "_" + DefaultNames.StorageNamePrefix;
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string blockName = $"{sbName}_{DefaultNames.BlockSuffix}";
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string layout = context.Config.Options.TargetApi == TargetApi.Vulkan ? ", set = 1" : string.Empty;
context.AppendLine($"layout (binding = {context.Config.FirstStorageBufferBinding}{layout}, std430) buffer {blockName}");
context.EnterScope();
context.AppendLine("uint " + DefaultNames.DataName + "[];");
context.LeaveScope($" {sbName}[{NumberFormatter.FormatInt(descriptors.Max(x => x.Slot) + 1)}];");
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}
private static void DeclareSamplers(CodeGenContext context, TextureDescriptor[] descriptors)
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{
int arraySize = 0;
foreach (var descriptor in descriptors)
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{
if (descriptor.Type.HasFlag(SamplerType.Indexed))
{
if (arraySize == 0)
{
arraySize = ShaderConfig.SamplerArraySize;
}
else if (--arraySize != 0)
{
continue;
}
}
string indexExpr = NumberFormatter.FormatInt(arraySize);
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string samplerName = OperandManager.GetSamplerName(
context.Config.Stage,
descriptor.CbufSlot,
descriptor.HandleIndex,
descriptor.Type.HasFlag(SamplerType.Indexed),
indexExpr);
string samplerTypeName = descriptor.Type.ToGlslSamplerType();
string layout = string.Empty;
if (context.Config.Options.TargetApi == TargetApi.Vulkan)
{
bool isBuffer = (descriptor.Type & SamplerType.Mask) == SamplerType.TextureBuffer;
int setIndex = isBuffer ? 4 : 2;
layout = $", set = {setIndex}";
}
context.AppendLine($"layout (binding = {descriptor.Binding}{layout}) uniform {samplerTypeName} {samplerName};");
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}
}
private static void DeclareImages(CodeGenContext context, TextureDescriptor[] descriptors)
{
int arraySize = 0;
foreach (var descriptor in descriptors)
{
if (descriptor.Type.HasFlag(SamplerType.Indexed))
{
if (arraySize == 0)
{
arraySize = ShaderConfig.SamplerArraySize;
}
else if (--arraySize != 0)
{
continue;
}
}
string indexExpr = NumberFormatter.FormatInt(arraySize);
string imageName = OperandManager.GetImageName(
context.Config.Stage,
descriptor.CbufSlot,
descriptor.HandleIndex,
descriptor.Format,
descriptor.Type.HasFlag(SamplerType.Indexed),
indexExpr);
string imageTypeName = descriptor.Type.ToGlslImageType(descriptor.Format.GetComponentType());
string layout = descriptor.Format.ToGlslFormat();
if (!string.IsNullOrEmpty(layout))
{
layout = ", " + layout;
}
if (context.Config.Options.TargetApi == TargetApi.Vulkan)
{
bool isBuffer = (descriptor.Type & SamplerType.Mask) == SamplerType.TextureBuffer;
int setIndex = isBuffer ? 5 : 3;
layout = $", set = {setIndex}{layout}";
}
context.AppendLine($"layout (binding = {descriptor.Binding}{layout}) uniform {imageTypeName} {imageName};");
}
}
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private static void DeclareInputAttributes(CodeGenContext context, StructuredProgramInfo info)
{
if (context.Config.GpPassthrough)
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{
for (int attr = 0; attr < MaxAttributes; attr++)
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{
DeclareInputAttribute(context, info, attr);
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}
foreach (int attr in info.IAttributes.OrderBy(x => x).Where(x => x >= MaxAttributes))
{
DeclareInputAttribute(context, info, attr);
}
}
else
{
foreach (int attr in info.IAttributes.OrderBy(x => x))
{
DeclareInputAttribute(context, info, attr);
}
}
}
private static void DeclareInputAttribute(CodeGenContext context, StructuredProgramInfo info, int attr)
{
string suffix = context.Config.Stage == ShaderStage.Geometry ? "[]" : string.Empty;
string iq = string.Empty;
if (context.Config.Stage == ShaderStage.Fragment)
{
iq = context.Config.ImapTypes[attr].GetFirstUsedType() switch
{
PixelImap.Constant => "flat ",
PixelImap.ScreenLinear => "noperspective ",
_ => string.Empty
};
}
string pass = context.Config.GpPassthrough && !info.OAttributes.Contains(attr) ? "passthrough, " : string.Empty;
string name = $"{DefaultNames.IAttributePrefix}{attr}";
if ((context.Config.Options.Flags & TranslationFlags.Feedback) != 0)
{
for (int c = 0; c < 4; c++)
{
char swzMask = "xyzw"[c];
context.AppendLine($"layout ({pass}location = {attr}, component = {c}) {iq}in float {name}_{swzMask}{suffix};");
}
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}
else
{
context.AppendLine($"layout ({pass}location = {attr}) {iq}in vec4 {name}{suffix};");
}
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}
private static void DeclareOutputAttributes(CodeGenContext context, StructuredProgramInfo info)
{
if (context.Config.Stage == ShaderStage.Fragment || context.Config.GpPassthrough)
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{
DeclareUsedOutputAttributes(context, info);
}
else
{
DeclareAllOutputAttributes(context, info);
}
}
private static void DeclareUsedOutputAttributes(CodeGenContext context, StructuredProgramInfo info)
{
foreach (int attr in info.OAttributes.OrderBy(x => x))
{
DeclareOutputAttribute(context, attr);
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}
}
private static void DeclareAllOutputAttributes(CodeGenContext context, StructuredProgramInfo info)
{
for (int attr = 0; attr < MaxAttributes; attr++)
{
DeclareOutputAttribute(context, attr);
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}
foreach (int attr in info.OAttributes.OrderBy(x => x).Where(x => x >= MaxAttributes))
{
DeclareOutputAttribute(context, attr);
}
}
private static void DeclareOutputAttribute(CodeGenContext context, int attr)
{
string name = $"{DefaultNames.OAttributePrefix}{attr}";
if ((context.Config.Options.Flags & TranslationFlags.Feedback) != 0)
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{
for (int c = 0; c < 4; c++)
{
char swzMask = "xyzw"[c];
context.AppendLine($"layout (location = {attr}, component = {c}) out float {name}_{swzMask};");
}
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}
else
{
context.AppendLine($"layout (location = {attr}) out vec4 {name};");
}
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}
private static void DeclareSupportUniformBlock(CodeGenContext context, bool isFragment, int scaleElements)
{
if (!isFragment && scaleElements == 0)
{
return;
}
context.AppendLine($"layout (binding = 0, std140) uniform {DefaultNames.SupportBlockName}");
context.EnterScope();
if (isFragment)
{
context.AppendLine($"uint {DefaultNames.SupportBlockAlphaTestName};");
context.AppendLine($"bool {DefaultNames.SupportBlockIsBgraName}[{SupportBuffer.FragmentIsBgraCount}];");
}
else
{
context.AppendLine($"uint s_reserved[{SupportBuffer.ComputeRenderScaleOffset / SupportBuffer.FieldSize}];");
}
if (scaleElements != 0)
{
context.AppendLine($"float {DefaultNames.SupportBlockRenderScaleName}[{scaleElements}];");
}
context.LeaveScope(";");
context.AppendLine();
}
private static void AppendHelperFunction(CodeGenContext context, string filename)
{
string code = EmbeddedResources.ReadAllText(filename);
code = code.Replace("\t", CodeGenContext.Tab);
code = code.Replace("$SHARED_MEM$", DefaultNames.SharedMemoryName);
code = code.Replace("$STORAGE_MEM$", OperandManager.GetShaderStagePrefix(context.Config.Stage) + "_" + DefaultNames.StorageNamePrefix);
context.AppendLine(code);
context.AppendLine();
}
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}
}