public void PrepareForReturn()
{
if (_shaderType == GalShaderType.Fragment)
{
if (_header.OmapDepth)
{
Operand dest = Attribute(AttributeConsts.FragmentOutputDepth);
Operand src = Register(_header.DepthRegister, RegisterType.Gpr);
this.Copy(dest, src);
}
int regIndex = 0;
for (int attachment = 0; attachment < 8; attachment++)
{
OutputMapTarget target = _header.OmapTargets[attachment];
for (int component = 0; component < 4; component++)
{
if (target.ComponentEnabled(component))
{
Operand dest = Attribute(AttributeConsts.FragmentOutputColorBase + regIndex * 4);
Operand src = Register(regIndex, RegisterType.Gpr);
this.Copy(dest, src);
regIndex++;
}
}
}
}
}
public ShaderHeader(ReadOnlySpan <byte> code)
{
ReadOnlySpan <int> header = MemoryMarshal.Cast <byte, int>(code);
int commonWord0 = header[0];
int commonWord1 = header[1];
int commonWord2 = header[2];
int commonWord3 = header[3];
int commonWord4 = header[4];
SphType = commonWord0.Extract(0, 5);
Version = commonWord0.Extract(5, 5);
Stage = (ShaderStage)commonWord0.Extract(10, 4);
// Invalid.
if (Stage == ShaderStage.Compute)
{
Stage = ShaderStage.Vertex;
}
MrtEnable = commonWord0.Extract(14);
KillsPixels = commonWord0.Extract(15);
DoesGlobalStore = commonWord0.Extract(16);
SassVersion = commonWord0.Extract(17, 4);
DoesLoadOrStore = commonWord0.Extract(26);
DoesFp64 = commonWord0.Extract(27);
StreamOutMask = commonWord0.Extract(28, 4);
ShaderLocalMemoryLowSize = commonWord1.Extract(0, 24);
PerPatchAttributeCount = commonWord1.Extract(24, 8);
ShaderLocalMemoryHighSize = commonWord2.Extract(0, 24);
ThreadsPerInputPrimitive = commonWord2.Extract(24, 8);
ShaderLocalMemoryCrsSize = commonWord3.Extract(0, 24);
OutputTopology = (OutputTopology)commonWord3.Extract(24, 4);
MaxOutputVertexCount = commonWord4.Extract(0, 12);
StoreReqStart = commonWord4.Extract(12, 8);
StoreReqEnd = commonWord4.Extract(24, 8);
int type2OmapTarget = header[18];
int type2Omap = header[19];
OmapTargets = new OutputMapTarget[8];
for (int offset = 0; offset < OmapTargets.Length * 4; offset += 4)
{
OmapTargets[offset >> 2] = new OutputMapTarget(
type2OmapTarget.Extract(offset + 0),
type2OmapTarget.Extract(offset + 1),
type2OmapTarget.Extract(offset + 2),
type2OmapTarget.Extract(offset + 3));
}
OmapSampleMask = type2Omap.Extract(0);
OmapDepth = type2Omap.Extract(1);
}