mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-08-20 15:48:43 +02:00
227 lines
9.7 KiB
C#
227 lines
9.7 KiB
C#
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using Ryujinx.Graphics.Shader.IntermediateRepresentation;
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using Ryujinx.Graphics.Shader.StructuredIr;
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using Ryujinx.Graphics.Shader.Translation;
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using static Spv.Specification;
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namespace Ryujinx.Graphics.Shader.CodeGen.Spirv
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{
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using SpvInstruction = Spv.Generator.Instruction;
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static class ScalingHelpers
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{
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public static SpvInstruction ApplyScaling(
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CodeGenContext context,
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AstTextureOperation texOp,
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SpvInstruction vector,
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bool intCoords,
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bool isBindless,
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bool isIndexed,
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bool isArray,
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int pCount)
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{
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if (intCoords)
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{
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if (context.Config.Stage.SupportsRenderScale() &&
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!isBindless &&
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!isIndexed)
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{
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int index = texOp.Inst == Instruction.ImageLoad
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? context.Config.GetTextureDescriptors().Length + context.Config.FindImageDescriptorIndex(texOp)
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: context.Config.FindTextureDescriptorIndex(texOp);
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if (pCount == 3 && isArray)
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{
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return ApplyScaling2DArray(context, vector, index);
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}
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else if (pCount == 2 && !isArray)
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{
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return ApplyScaling2D(context, vector, index);
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}
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}
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}
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return vector;
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}
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private static SpvInstruction ApplyScaling2DArray(CodeGenContext context, SpvInstruction vector, int index)
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{
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// The array index is not scaled, just x and y.
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var vectorXY = context.VectorShuffle(context.TypeVector(context.TypeS32(), 2), vector, vector, 0, 1);
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var vectorZ = context.CompositeExtract(context.TypeS32(), vector, 2);
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var vectorXYScaled = ApplyScaling2D(context, vectorXY, index);
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var vectorScaled = context.CompositeConstruct(context.TypeVector(context.TypeS32(), 3), vectorXYScaled, vectorZ);
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return vectorScaled;
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}
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private static SpvInstruction ApplyScaling2D(CodeGenContext context, SpvInstruction vector, int index)
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{
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var pointerType = context.TypePointer(StorageClass.Uniform, context.TypeFP32());
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var fieldIndex = context.Constant(context.TypeU32(), 4);
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var scaleIndex = context.Constant(context.TypeU32(), index);
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if (context.Config.Stage == ShaderStage.Vertex)
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{
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var scaleCountPointerType = context.TypePointer(StorageClass.Uniform, context.TypeS32());
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var scaleCountElemPointer = context.AccessChain(scaleCountPointerType, context.SupportBuffer, context.Constant(context.TypeU32(), 3));
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var scaleCount = context.Load(context.TypeS32(), scaleCountElemPointer);
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scaleIndex = context.IAdd(context.TypeU32(), scaleIndex, scaleCount);
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}
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scaleIndex = context.IAdd(context.TypeU32(), scaleIndex, context.Constant(context.TypeU32(), 1));
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var scaleElemPointer = context.AccessChain(pointerType, context.SupportBuffer, fieldIndex, scaleIndex);
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var scale = context.Load(context.TypeFP32(), scaleElemPointer);
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var ivector2Type = context.TypeVector(context.TypeS32(), 2);
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var localVector = context.CoordTemp;
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var passthrough = context.FOrdEqual(context.TypeBool(), scale, context.Constant(context.TypeFP32(), 1f));
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var mergeLabel = context.Label();
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if (context.Config.Stage == ShaderStage.Fragment)
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{
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var scaledInterpolatedLabel = context.Label();
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var scaledNoInterpolationLabel = context.Label();
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var needsInterpolation = context.FOrdLessThan(context.TypeBool(), scale, context.Constant(context.TypeFP32(), 0f));
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context.SelectionMerge(mergeLabel, SelectionControlMask.MaskNone);
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context.BranchConditional(needsInterpolation, scaledInterpolatedLabel, scaledNoInterpolationLabel);
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// scale < 0.0
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context.AddLabel(scaledInterpolatedLabel);
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ApplyScalingInterpolated(context, localVector, vector, scale);
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context.Branch(mergeLabel);
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// scale >= 0.0
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context.AddLabel(scaledNoInterpolationLabel);
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ApplyScalingNoInterpolation(context, localVector, vector, scale);
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context.Branch(mergeLabel);
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context.AddLabel(mergeLabel);
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var passthroughLabel = context.Label();
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var finalMergeLabel = context.Label();
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context.SelectionMerge(finalMergeLabel, SelectionControlMask.MaskNone);
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context.BranchConditional(passthrough, passthroughLabel, finalMergeLabel);
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context.AddLabel(passthroughLabel);
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context.Store(localVector, vector);
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context.Branch(finalMergeLabel);
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context.AddLabel(finalMergeLabel);
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return context.Load(ivector2Type, localVector);
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}
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else
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{
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var passthroughLabel = context.Label();
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var scaledLabel = context.Label();
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context.SelectionMerge(mergeLabel, SelectionControlMask.MaskNone);
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context.BranchConditional(passthrough, passthroughLabel, scaledLabel);
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// scale == 1.0
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context.AddLabel(passthroughLabel);
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context.Store(localVector, vector);
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context.Branch(mergeLabel);
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// scale != 1.0
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context.AddLabel(scaledLabel);
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ApplyScalingNoInterpolation(context, localVector, vector, scale);
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context.Branch(mergeLabel);
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context.AddLabel(mergeLabel);
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return context.Load(ivector2Type, localVector);
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}
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}
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private static void ApplyScalingInterpolated(CodeGenContext context, SpvInstruction output, SpvInstruction vector, SpvInstruction scale)
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{
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var vector2Type = context.TypeVector(context.TypeFP32(), 2);
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var scaleNegated = context.FNegate(context.TypeFP32(), scale);
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var scaleVector = context.CompositeConstruct(vector2Type, scaleNegated, scaleNegated);
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var vectorFloat = context.ConvertSToF(vector2Type, vector);
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var vectorScaled = context.VectorTimesScalar(vector2Type, vectorFloat, scaleNegated);
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var fragCoordPointer = context.Inputs[AttributeConsts.PositionX];
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var fragCoord = context.Load(context.TypeVector(context.TypeFP32(), 4), fragCoordPointer);
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var fragCoordXY = context.VectorShuffle(vector2Type, fragCoord, fragCoord, 0, 1);
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var scaleMod = context.FMod(vector2Type, fragCoordXY, scaleVector);
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var vectorInterpolated = context.FAdd(vector2Type, vectorScaled, scaleMod);
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context.Store(output, context.ConvertFToS(context.TypeVector(context.TypeS32(), 2), vectorInterpolated));
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}
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private static void ApplyScalingNoInterpolation(CodeGenContext context, SpvInstruction output, SpvInstruction vector, SpvInstruction scale)
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{
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if (context.Config.Stage == ShaderStage.Vertex)
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{
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scale = context.GlslFAbs(context.TypeFP32(), scale);
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}
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var vector2Type = context.TypeVector(context.TypeFP32(), 2);
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var vectorFloat = context.ConvertSToF(vector2Type, vector);
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var vectorScaled = context.VectorTimesScalar(vector2Type, vectorFloat, scale);
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context.Store(output, context.ConvertFToS(context.TypeVector(context.TypeS32(), 2), vectorScaled));
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}
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public static SpvInstruction ApplyUnscaling(
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CodeGenContext context,
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AstTextureOperation texOp,
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SpvInstruction size,
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bool isBindless,
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bool isIndexed)
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{
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if (context.Config.Stage.SupportsRenderScale() &&
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!isBindless &&
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!isIndexed)
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{
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int index = context.Config.FindTextureDescriptorIndex(texOp);
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var pointerType = context.TypePointer(StorageClass.Uniform, context.TypeFP32());
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var fieldIndex = context.Constant(context.TypeU32(), 4);
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var scaleIndex = context.Constant(context.TypeU32(), index);
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if (context.Config.Stage == ShaderStage.Vertex)
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{
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var scaleCountPointerType = context.TypePointer(StorageClass.Uniform, context.TypeS32());
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var scaleCountElemPointer = context.AccessChain(scaleCountPointerType, context.SupportBuffer, context.Constant(context.TypeU32(), 3));
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var scaleCount = context.Load(context.TypeS32(), scaleCountElemPointer);
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scaleIndex = context.IAdd(context.TypeU32(), scaleIndex, scaleCount);
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}
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scaleIndex = context.IAdd(context.TypeU32(), scaleIndex, context.Constant(context.TypeU32(), 1));
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var scaleElemPointer = context.AccessChain(pointerType, context.SupportBuffer, fieldIndex, scaleIndex);
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var scale = context.GlslFAbs(context.TypeFP32(), context.Load(context.TypeFP32(), scaleElemPointer));
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var passthrough = context.FOrdEqual(context.TypeBool(), scale, context.Constant(context.TypeFP32(), 1f));
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var sizeFloat = context.ConvertSToF(context.TypeFP32(), size);
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var sizeUnscaled = context.FDiv(context.TypeFP32(), sizeFloat, scale);
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var sizeUnscaledInt = context.ConvertFToS(context.TypeS32(), sizeUnscaled);
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return context.Select(context.TypeS32(), passthrough, size, sizeUnscaledInt);
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}
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return size;
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}
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}
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}
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