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using Ryujinx.Graphics.Shader.Decoders;
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
namespace Ryujinx.Graphics.Shader.Translation
{
class EmitterContext
{
public DecodedProgram Program { get; }
public ShaderConfig Config { get; }
public bool IsNonMain { get; }
public Block CurrBlock { get; set; }
public InstOp CurrOp { get; set; }
public int OperationsCount => _operations.Count;
private readonly List<Operation> _operations;
private readonly Dictionary<ulong, Operand> _labels;
public EmitterContext(DecodedProgram program, ShaderConfig config, bool isNonMain)
{
Program = program;
Config = config;
IsNonMain = isNonMain;
_operations = new List<Operation>();
_labels = new Dictionary<ulong, Operand>();
}
public T GetOp<T>() where T : unmanaged
{
Debug.Assert(Unsafe.SizeOf<T>() == sizeof(ulong));
ulong op = CurrOp.RawOpCode;
return Unsafe.As<ulong, T>(ref op);
}
public Operand Add(Instruction inst, Operand dest = null, params Operand[] sources)
{
Operation operation = new Operation(inst, dest, sources);
Add(operation);
return dest;
}
public (Operand, Operand) Add(Instruction inst, (Operand, Operand) dest, params Operand[] sources)
{
Operand[] dests = new[] { dest.Item1, dest.Item2 };
Operation operation = new Operation(inst, 0, dests, sources);
Add(operation);
return dest;
}
public void Add(Operation operation)
{
_operations.Add(operation);
}
public TextureOperation CreateTextureOperation(
Instruction inst,
SamplerType type,
TextureFlags flags,
int handle,
int compIndex,
Operand dest,
params Operand[] sources)
{
return CreateTextureOperation(inst, type, TextureFormat.Unknown, flags, handle, compIndex, dest, sources);
}
public TextureOperation CreateTextureOperation(
Instruction inst,
SamplerType type,
TextureFormat format,
TextureFlags flags,
int handle,
int compIndex,
Operand dest,
params Operand[] sources)
{
if (!flags.HasFlag(TextureFlags.Bindless))
{
Config.SetUsedTexture(inst, type, format, flags, TextureOperation.DefaultCbufSlot, handle);
}
return new TextureOperation(inst, type, format, flags, handle, compIndex, dest, sources);
}
public void FlagAttributeRead(int attribute)
{
if (Config.Stage == ShaderStage.Vertex && attribute == AttributeConsts.InstanceId)
{
Config.SetUsedFeature(FeatureFlags.InstanceId);
}
else if (Config.Stage == ShaderStage.Fragment)
{
switch (attribute)
{
case AttributeConsts.PositionX:
case AttributeConsts.PositionY:
Config.SetUsedFeature(FeatureFlags.FragCoordXY);
break;
}
}
}
public void FlagAttributeWritten(int attribute)
{
if (Config.Stage == ShaderStage.Vertex)
{
switch (attribute)
{
case AttributeConsts.ClipDistance0:
case AttributeConsts.ClipDistance1:
case AttributeConsts.ClipDistance2:
case AttributeConsts.ClipDistance3:
case AttributeConsts.ClipDistance4:
case AttributeConsts.ClipDistance5:
case AttributeConsts.ClipDistance6:
case AttributeConsts.ClipDistance7:
Config.SetClipDistanceWritten((attribute - AttributeConsts.ClipDistance0) / 4);
break;
}
}
if (Config.Stage != ShaderStage.Fragment && attribute == AttributeConsts.Layer)
{
Config.SetUsedFeature(FeatureFlags.RtLayer);
}
}
public void MarkLabel(Operand label)
{
Add(Instruction.MarkLabel, label);
}
public Operand GetLabel(ulong address)
{
if (!_labels.TryGetValue(address, out Operand label))
{
label = Label();
_labels.Add(address, label);
}
return label;
}
public void PrepareForReturn()
{
if (!IsNonMain && Config.Stage == ShaderStage.Fragment)
{
if (Config.OmapDepth)
{
Operand dest = Attribute(AttributeConsts.FragmentOutputDepth);
Operand src = Register(Config.GetDepthRegister(), RegisterType.Gpr);
this.Copy(dest, src);
}
bool supportsBgra = Config.GpuAccessor.QueryHostSupportsBgraFormat();
int regIndexBase = 0;
for (int rtIndex = 0; rtIndex < 8; rtIndex++)
{
for (int component = 0; component < 4; component++)
{
bool componentEnabled = (Config.OmapTargets & (1 << (rtIndex * 4 + component))) != 0;
if (!componentEnabled)
{
continue;
}
int fragmentOutputColorAttr = AttributeConsts.FragmentOutputColorBase + rtIndex * 16;
Operand src = Register(regIndexBase + component, RegisterType.Gpr);
// Perform B <-> R swap if needed, for BGRA formats (not supported on OpenGL).
if (!supportsBgra && (component == 0 || component == 2))
{
Operand isBgra = Attribute(AttributeConsts.FragmentOutputIsBgraBase + rtIndex * 4);
Operand lblIsBgra = Label();
Operand lblEnd = Label();
this.BranchIfTrue(lblIsBgra, isBgra);
this.Copy(Attribute(fragmentOutputColorAttr + component * 4), src);
this.Branch(lblEnd);
MarkLabel(lblIsBgra);
this.Copy(Attribute(fragmentOutputColorAttr + (2 - component) * 4), src);
MarkLabel(lblEnd);
}
else
{
this.Copy(Attribute(fragmentOutputColorAttr + component * 4), src);
}
}
bool targetEnabled = (Config.OmapTargets & (0xf << (rtIndex * 4))) != 0;
if (targetEnabled)
{
Config.SetOutputUserAttribute(rtIndex, perPatch: false);
regIndexBase += 4;
}
}
}
}
public Operation[] GetOperations()
{
return _operations.ToArray();
}
}
}
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