public static SpvInstruction ApplyScaling(
CodeGenContext context,
AstTextureOperation texOp,
SpvInstruction vector,
bool intCoords,
bool isBindless,
bool isIndexed,
bool isArray,
int pCount)
{
if (intCoords)
{
if (context.Config.Stage.SupportsRenderScale() &&
!isBindless &&
!isIndexed)
{
int index = texOp.Inst == Instruction.ImageLoad
? context.Config.GetTextureDescriptors().Length + context.Config.FindImageDescriptorIndex(texOp)
: context.Config.FindTextureDescriptorIndex(texOp);
if (pCount == 3 && isArray)
{
return(ApplyScaling2DArray(context, vector, index));
}
else if (pCount == 2 && !isArray)
{
return(ApplyScaling2D(context, vector, index));
}
}
}
return(vector);
}
private static SpvInstruction ApplyScaling2DArray(CodeGenContext context, SpvInstruction vector, int index)
{
// The array index is not scaled, just x and y.
var vectorXY = context.VectorShuffle(context.TypeVector(context.TypeS32(), 2), vector, vector, 0, 1);
var vectorZ = context.CompositeExtract(context.TypeS32(), vector, 2);
var vectorXYScaled = ApplyScaling2D(context, vectorXY, index);
var vectorScaled = context.CompositeConstruct(context.TypeVector(context.TypeS32(), 3), vectorXYScaled, vectorZ);
return(vectorScaled);
}
private static void ApplyScalingNoInterpolation(CodeGenContext context, SpvInstruction output, SpvInstruction vector, SpvInstruction scale)
{
if (context.Config.Stage == ShaderStage.Vertex)
{
scale = context.GlslFAbs(context.TypeFP32(), scale);
}
var vector2Type = context.TypeVector(context.TypeFP32(), 2);
var vectorFloat = context.ConvertSToF(vector2Type, vector);
var vectorScaled = context.VectorTimesScalar(vector2Type, vectorFloat, scale);
context.Store(output, context.ConvertFToS(context.TypeVector(context.TypeS32(), 2), vectorScaled));
}
public static byte[] Generate(StructuredProgramInfo info, ShaderConfig config)
{
CodeGenContext context = new CodeGenContext(config);
context.AddCapability(Capability.GroupNonUniformBallot);
context.AddCapability(Capability.ImageBuffer);
context.AddCapability(Capability.SampledBuffer);
context.AddCapability(Capability.SubgroupBallotKHR);
context.AddCapability(Capability.SubgroupVoteKHR);
context.AddExtension("SPV_KHR_shader_ballot");
context.AddExtension("SPV_KHR_subgroup_vote");
Declarations.DeclareAll(context, info);
if ((info.HelperFunctionsMask & NeedsInvocationIdMask) != 0)
{
Declarations.DeclareInvocationId(context);
}
for (int funcIndex = 0; funcIndex < info.Functions.Count; funcIndex++)
{
var function = info.Functions[funcIndex];
var retType = context.GetType(function.ReturnType.Convert());
var funcArgs = new SpvInstruction[function.InArguments.Length + function.OutArguments.Length];
for (int argIndex = 0; argIndex < funcArgs.Length; argIndex++)
{
var argType = context.GetType(function.GetArgumentType(argIndex).Convert());
var argPointerType = context.TypePointer(StorageClass.Function, argType);
funcArgs[argIndex] = argPointerType;
}
var funcType = context.TypeFunction(retType, false, funcArgs);
var spvFunc = context.Function(retType, FunctionControlMask.MaskNone, funcType);
context.DeclareFunction(funcIndex, function, spvFunc);
}
for (int funcIndex = 0; funcIndex < info.Functions.Count; funcIndex++)
{
Generate(context, info, funcIndex);
}
return(context.Generate());
}
private static void ApplyScalingInterpolated(CodeGenContext context, SpvInstruction output, SpvInstruction vector, SpvInstruction scale)
{
var vector2Type = context.TypeVector(context.TypeFP32(), 2);
var scaleNegated = context.FNegate(context.TypeFP32(), scale);
var scaleVector = context.CompositeConstruct(vector2Type, scaleNegated, scaleNegated);
var vectorFloat = context.ConvertSToF(vector2Type, vector);
var vectorScaled = context.VectorTimesScalar(vector2Type, vectorFloat, scaleNegated);
var fragCoordPointer = context.Inputs[AttributeConsts.PositionX];
var fragCoord = context.Load(context.TypeVector(context.TypeFP32(), 4), fragCoordPointer);
var fragCoordXY = context.VectorShuffle(vector2Type, fragCoord, fragCoord, 0, 1);
var scaleMod = context.FMod(vector2Type, fragCoordXY, scaleVector);
var vectorInterpolated = context.FAdd(vector2Type, vectorScaled, scaleMod);
context.Store(output, context.ConvertFToS(context.TypeVector(context.TypeS32(), 2), vectorInterpolated));
}
public static SpvInstruction ApplyUnscaling(
CodeGenContext context,
AstTextureOperation texOp,
SpvInstruction size,
bool isBindless,
bool isIndexed)
{
if (context.Config.Stage.SupportsRenderScale() &&
!isBindless &&
!isIndexed)
{
int index = context.Config.FindTextureDescriptorIndex(texOp);
var pointerType = context.TypePointer(StorageClass.Uniform, context.TypeFP32());
var fieldIndex = context.Constant(context.TypeU32(), 4);
var scaleIndex = context.Constant(context.TypeU32(), index);
if (context.Config.Stage == ShaderStage.Vertex)
{
var scaleCountPointerType = context.TypePointer(StorageClass.Uniform, context.TypeS32());
var scaleCountElemPointer = context.AccessChain(scaleCountPointerType, context.SupportBuffer, context.Constant(context.TypeU32(), 3));
var scaleCount = context.Load(context.TypeS32(), scaleCountElemPointer);
scaleIndex = context.IAdd(context.TypeU32(), scaleIndex, scaleCount);
}
scaleIndex = context.IAdd(context.TypeU32(), scaleIndex, context.Constant(context.TypeU32(), 1));
var scaleElemPointer = context.AccessChain(pointerType, context.SupportBuffer, fieldIndex, scaleIndex);
var scale = context.GlslFAbs(context.TypeFP32(), context.Load(context.TypeFP32(), scaleElemPointer));
var passthrough = context.FOrdEqual(context.TypeBool(), scale, context.Constant(context.TypeFP32(), 1f));
var sizeFloat = context.ConvertSToF(context.TypeFP32(), size);
var sizeUnscaled = context.FDiv(context.TypeFP32(), sizeFloat, scale);
var sizeUnscaledInt = context.ConvertFToS(context.TypeS32(), sizeUnscaled);
return(context.Select(context.TypeS32(), passthrough, size, sizeUnscaledInt));
}
return(size);
}
public static void DeclareLocalForArgs(CodeGenContext context, List <StructuredFunction> functions)
{
for (int funcIndex = 0; funcIndex < functions.Count; funcIndex++)
{
StructuredFunction function = functions[funcIndex];
SpvInstruction[] locals = new SpvInstruction[function.InArguments.Length];
for (int i = 0; i < function.InArguments.Length; i++)
{
var type = function.GetArgumentType(i).Convert();
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 byte[] Generate(StructuredProgramInfo info, ShaderConfig config)
{
SpvInstructionPool instPool;
SpvLiteralIntegerPool integerPool;
lock (PoolLock)
{
instPool = InstructionPool.Allocate();
integerPool = IntegerPool.Allocate();
}
CodeGenContext context = new CodeGenContext(info, config, instPool, integerPool);
context.AddCapability(Capability.GroupNonUniformBallot);
context.AddCapability(Capability.ImageBuffer);
context.AddCapability(Capability.ImageGatherExtended);
context.AddCapability(Capability.ImageQuery);
context.AddCapability(Capability.SampledBuffer);
context.AddCapability(Capability.SubgroupBallotKHR);
context.AddCapability(Capability.SubgroupVoteKHR);
if (config.TransformFeedbackEnabled && config.LastInVertexPipeline)
{
context.AddCapability(Capability.TransformFeedback);
}
if (config.Stage == ShaderStage.Fragment && context.Config.GpuAccessor.QueryHostSupportsFragmentShaderInterlock())
{
context.AddCapability(Capability.FragmentShaderPixelInterlockEXT);
context.AddExtension("SPV_EXT_fragment_shader_interlock");
}
else if (config.Stage == ShaderStage.Geometry)
{
context.AddCapability(Capability.Geometry);
if (config.GpPassthrough && context.Config.GpuAccessor.QueryHostSupportsGeometryShaderPassthrough())
{
context.AddExtension("SPV_NV_geometry_shader_passthrough");
context.AddCapability(Capability.GeometryShaderPassthroughNV);
}
}
else if (config.Stage == ShaderStage.TessellationControl || config.Stage == ShaderStage.TessellationEvaluation)
{
context.AddCapability(Capability.Tessellation);
}
context.AddExtension("SPV_KHR_shader_ballot");
context.AddExtension("SPV_KHR_subgroup_vote");
Declarations.DeclareAll(context, info);
if ((info.HelperFunctionsMask & NeedsInvocationIdMask) != 0)
{
Declarations.DeclareInvocationId(context);
}
for (int funcIndex = 0; funcIndex < info.Functions.Count; funcIndex++)
{
var function = info.Functions[funcIndex];
var retType = context.GetType(function.ReturnType.Convert());
var funcArgs = new SpvInstruction[function.InArguments.Length + function.OutArguments.Length];
for (int argIndex = 0; argIndex < funcArgs.Length; argIndex++)
{
var argType = context.GetType(function.GetArgumentType(argIndex).Convert());
var argPointerType = context.TypePointer(StorageClass.Function, argType);
funcArgs[argIndex] = argPointerType;
}
var funcType = context.TypeFunction(retType, false, funcArgs);
var spvFunc = context.Function(retType, FunctionControlMask.MaskNone, funcType);
context.DeclareFunction(funcIndex, function, spvFunc);
}
for (int funcIndex = 0; funcIndex < info.Functions.Count; funcIndex++)
{
Generate(context, info, funcIndex);
}
byte[] result = context.Generate();
lock (PoolLock)
{
InstructionPool.Release(instPool);
IntegerPool.Release(integerPool);
}
return(result);
}
private static SpvInstruction ApplyScaling2D(CodeGenContext context, SpvInstruction vector, int index)
{
var pointerType = context.TypePointer(StorageClass.Uniform, context.TypeFP32());
var fieldIndex = context.Constant(context.TypeU32(), 4);
var scaleIndex = context.Constant(context.TypeU32(), index);
if (context.Config.Stage == ShaderStage.Vertex)
{
var scaleCountPointerType = context.TypePointer(StorageClass.Uniform, context.TypeS32());
var scaleCountElemPointer = context.AccessChain(scaleCountPointerType, context.SupportBuffer, context.Constant(context.TypeU32(), 3));
var scaleCount = context.Load(context.TypeS32(), scaleCountElemPointer);
scaleIndex = context.IAdd(context.TypeU32(), scaleIndex, scaleCount);
}
scaleIndex = context.IAdd(context.TypeU32(), scaleIndex, context.Constant(context.TypeU32(), 1));
var scaleElemPointer = context.AccessChain(pointerType, context.SupportBuffer, fieldIndex, scaleIndex);
var scale = context.Load(context.TypeFP32(), scaleElemPointer);
var ivector2Type = context.TypeVector(context.TypeS32(), 2);
var localVector = context.CoordTemp;
var passthrough = context.FOrdEqual(context.TypeBool(), scale, context.Constant(context.TypeFP32(), 1f));
var mergeLabel = context.Label();
if (context.Config.Stage == ShaderStage.Fragment)
{
var scaledInterpolatedLabel = context.Label();
var scaledNoInterpolationLabel = context.Label();
var needsInterpolation = context.FOrdLessThan(context.TypeBool(), scale, context.Constant(context.TypeFP32(), 0f));
context.SelectionMerge(mergeLabel, SelectionControlMask.MaskNone);
context.BranchConditional(needsInterpolation, scaledInterpolatedLabel, scaledNoInterpolationLabel);
// scale < 0.0
context.AddLabel(scaledInterpolatedLabel);
ApplyScalingInterpolated(context, localVector, vector, scale);
context.Branch(mergeLabel);
// scale >= 0.0
context.AddLabel(scaledNoInterpolationLabel);
ApplyScalingNoInterpolation(context, localVector, vector, scale);
context.Branch(mergeLabel);
context.AddLabel(mergeLabel);
var passthroughLabel = context.Label();
var finalMergeLabel = context.Label();
context.SelectionMerge(finalMergeLabel, SelectionControlMask.MaskNone);
context.BranchConditional(passthrough, passthroughLabel, finalMergeLabel);
context.AddLabel(passthroughLabel);
context.Store(localVector, vector);
context.Branch(finalMergeLabel);
context.AddLabel(finalMergeLabel);
return(context.Load(ivector2Type, localVector));
}
else
{
var passthroughLabel = context.Label();
var scaledLabel = context.Label();
context.SelectionMerge(mergeLabel, SelectionControlMask.MaskNone);
context.BranchConditional(passthrough, passthroughLabel, scaledLabel);
// scale == 1.0
context.AddLabel(passthroughLabel);
context.Store(localVector, vector);
context.Branch(mergeLabel);
// scale != 1.0
context.AddLabel(scaledLabel);
ApplyScalingNoInterpolation(context, localVector, vector, scale);
context.Branch(mergeLabel);
context.AddLabel(mergeLabel);
return(context.Load(ivector2Type, localVector));
}
}
