virtual public ShaderModel ReadShader()
{
int dxbc = ReadInt32();
System.Diagnostics.Debug.Assert(dxbc == FourCC.Make("DXBC"));
ReadBytes(16); // checksum
ReadInt32(); // 1
ReadInt32(); // totalSize
int chunkCount = ReadInt32();
int[] chunkOffsets = new int[chunkCount];
for (int i = 0; i < chunkCount; i++)
{
chunkOffsets[i] = ReadInt32();
}
ShaderModel shader = null;
foreach (int chunkOffset in chunkOffsets)
{
BaseStream.Position = chunkOffset;
string chunkType = FourCC.Decode(ReadInt32());
if (chunkType == "RDEF")
{
ReadBytes(20);
byte majorVersion = ReadByte();
byte minorVersion = ReadByte();
ShaderType shaderType = (ShaderType)ReadUInt16();
shader = new ShaderModel(minorVersion, majorVersion, shaderType);
}
else if (chunkType == "OSGN")
{
}
else if (chunkType == "SHDR")
{
ReadBytes(8);
int chunkSize = ReadInt32() * 4;
long chunkEnd = BaseStream.Position + chunkSize - 8;
while (BaseStream.Position < chunkEnd)
{
D3D10Instruction instruction = ReadInstruction();
InstructionVerifier.Verify(instruction);
shader.Instructions.Add(instruction);
}
}
}
return(shader);
}
private D3D10Instruction ReadInstruction()
{
uint opcodeToken = ReadUInt32();
D3D10Opcode opcode = (D3D10Opcode)(opcodeToken & 0x7FF);
int operandCount = (int)((opcodeToken >> 24) & 0x7F) - 1;
bool isExtended = (opcodeToken & 0x80000000) != 0;
if (isExtended)
{
throw new NotImplementedException();
}
uint[] operandTokens = new uint[operandCount];
for (int i = 0; i < operandCount; i++)
{
operandTokens[i] = ReadUInt32();
}
var instruction = new D3D10Instruction(opcode, operandTokens);
return(instruction);
}
private static string GetSourceName(D3D10Instruction instruction, int srcIndex)
{
var operandType = instruction.GetOperandType(srcIndex);
if (operandType == OperandType.Immediate32)
{
var componentSelection = instruction.GetOperandComponentSelection(srcIndex);
if (componentSelection == D3D10OperandNumComponents.Operand1Component)
{
string immediate;
if (instruction.Opcode == D3D10Opcode.Discard)
{
immediate = instruction.GetParamInt(srcIndex).ToString();
}
else
{
immediate = ConstantFormatter.Format(instruction.GetParamSingle(srcIndex));
}
return($"l({immediate})");
}
else
{
string immediate0 = ConstantFormatter.Format(instruction.GetParamSingle(srcIndex, 0));
string immediate1 = ConstantFormatter.Format(instruction.GetParamSingle(srcIndex, 1));
string immediate2 = ConstantFormatter.Format(instruction.GetParamSingle(srcIndex, 2));
string immediate3 = ConstantFormatter.Format(instruction.GetParamSingle(srcIndex, 3));
return($"l({immediate0}, {immediate1}, {immediate2}, {immediate3})");
}
}
string sourceName = instruction.GetParamRegisterName(srcIndex);
sourceName += instruction.GetSourceSwizzleName(srcIndex);
sourceName = ApplyModifier(instruction.GetOperandModifier(srcIndex), sourceName);
return(sourceName);
}
private void WriteD3D10Instruction(D3D10Instruction instruction)
{
switch (instruction.Opcode)
{
case D3D10Opcode.Add:
WriteLine("add {0}, {1}, {2}", GetDestinationName(instruction),
GetSourceName(instruction, 1), GetSourceName(instruction, 2));
break;
case D3D10Opcode.DclInputPS:
WriteLine("dcl_input_ps {0} {1}", instruction.GetInterpolationModeName(), GetDestinationName(instruction));
break;
case D3D10Opcode.DclInput:
WriteLine("dcl_input {0}", GetDestinationName(instruction));
break;
case D3D10Opcode.DclOutput:
WriteLine("dcl_output {0}", GetDestinationName(instruction));
break;
case D3D10Opcode.DclTemps:
WriteLine("dcl_temps {0}", instruction.GetParamInt(0));
break;
case D3D10Opcode.Discard:
WriteLine("discard_nz {0}", GetSourceName(instruction, 0));
break;
case D3D10Opcode.Dp2:
WriteLine("dp2 {0}, {1}, {2}", GetDestinationName(instruction),
GetSourceName(instruction, 1), GetSourceName(instruction, 2));
break;
case D3D10Opcode.Dp3:
WriteLine("dp3 {0}, {1}, {2}", GetDestinationName(instruction),
GetSourceName(instruction, 1), GetSourceName(instruction, 2));
break;
case D3D10Opcode.Dp4:
WriteLine("dp4 {0}, {1}, {2}", GetDestinationName(instruction),
GetSourceName(instruction, 1), GetSourceName(instruction, 2));
break;
case D3D10Opcode.Mad:
WriteLine("mad {0}, {1}, {2}, {3}", GetDestinationName(instruction),
GetSourceName(instruction, 1), GetSourceName(instruction, 2), GetSourceName(instruction, 3));
break;
case D3D10Opcode.Mov:
WriteLine("mov {0}, {1}", GetDestinationName(instruction), GetSourceName(instruction, 1));
break;
case D3D10Opcode.Mul:
WriteLine("mul {0}, {1}, {2}", GetDestinationName(instruction),
GetSourceName(instruction, 1), GetSourceName(instruction, 2));
break;
case D3D10Opcode.Ret:
WriteLine("ret");
break;
case D3D10Opcode.Rsq:
WriteLine("rsq {0}, {1}", GetDestinationName(instruction),
GetSourceName(instruction, 1));
break;
default:
WriteLine(instruction.Opcode.ToString());
Console.WriteLine(instruction.Opcode);
//throw new NotImplementedException();
break;
}
}
