public static string ConvertToGLSL(ByteArray agal, textures.SamplerState[] outSamplers)
{
agal.position = 0;
int magic = agal.readByte();
if (magic != 0xA0)
{
throw new InvalidOperationException("Magic value must be 0xA0, may not be AGAL");
}
int version = agal.readInt();
if (version != 1)
{
throw new InvalidOperationException("Version must be 1");
}
int shaderTypeId = agal.readByte();
if (shaderTypeId != 0xA1)
{
throw new InvalidOperationException("Shader type id must be 0xA1");
}
ProgramType programType = (agal.readByte() == 0) ? ProgramType.Vertex : ProgramType.Fragment;
var map = new RegisterMap();
var sb = new StringBuilder();
while (agal.position < agal.length)
{
// fetch instruction info
int opcode = agal.readInt();
uint dest = (uint)agal.readInt();
ulong source1 = ReadUInt64(agal);
ulong source2 = ReadUInt64(agal);
// sb.Append("\t");
// sb.AppendFormat("// opcode:{0:X} dest:{1:X} source1:{2:X} source2:{3:X}\n", opcode,
// dest, source1, source2);
// parse registers
var dr = DestReg.Parse(dest, programType);
var sr1 = SourceReg.Parse(source1, programType, dr.mask);
var sr2 = SourceReg.Parse(source2, programType, dr.mask);
// switch on opcode and emit GLSL
sb.Append("\t");
switch (opcode)
{
case 0x00: // mov
sb.AppendFormat("{0} = {1}; // mov", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x01: // add
sb.AppendFormat("{0} = {1} + {2}; // add", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x02: // sub
sb.AppendFormat("{0} = {1} - {2}; // sub", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x03: // mul
sb.AppendFormat("{0} = {1} * {2}; // mul", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x04: // div
sb.AppendFormat("{0} = {1} / {2}; // div", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x05: // rcp
sb.AppendFormat("{0} = vec4(1) / {1}; // rcp (untested)", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x06: // min
sb.AppendFormat("{0} = min({1}, {2}); // min", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x07: // max
sb.AppendFormat("{0} = max({1}, {2}); // max", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x08: // frc
sb.AppendFormat("{0} = fract({1}); // frc", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x09: // sqrt
sb.AppendFormat("{0} = sqrt({1}); // sqrt", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0A: // rsq
sb.AppendFormat("{0} = inversesqrt({1}); // rsq", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0B: // pow
sb.AppendFormat("{0} = pow({1}, {2}); // pow", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x0C: // log
sb.AppendFormat("{0} = log2({1}); // log", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0D: // exp
sb.AppendFormat("{0} = exp2({1}); // exp", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0E: // normalize
sb.AppendFormat("{0} = normalize({1}); // normalize", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0F: // sin
sb.AppendFormat("{0} = sin({1}); // sin", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x10: // cos
sb.AppendFormat("{0} = cos({1}); // cos", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x11: // crs
sr1.sourceMask = sr2.sourceMask = 7; // adjust source mask for xyz input to dot product
sb.AppendFormat("{0} = cross(vec3({1}), vec3({2})); // crs", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x12: // dp3
sr1.sourceMask = sr2.sourceMask = 7; // adjust source mask for xyz input to dot product
sb.AppendFormat("{0} = dot(vec3({1}), vec3({2})); // dp3", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x13: // dp4
sr1.sourceMask = sr2.sourceMask = 0xF; // adjust source mask for xyzw input to dot product
sb.AppendFormat("{0} = dot(vec4({1}), vec4({2})); // dp4", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x14: // abs
sb.AppendFormat("{0} = abs({1}); // abs", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x15: // neg
sb.AppendFormat("{0} = -{1}; // neg", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x16: // saturate
sb.AppendFormat("{0} = clamp({1}, 0.0, 1.0); // saturate", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x17: // m33
{
var existingUsage = map.GetUsage(sr2);
if (existingUsage != RegisterUsage.Vector4)
{
sb.AppendFormat("{0} = {1} * mat3({2}); // m33", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(false));
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Matrix44); // 33?
}
else
{
// compose the matrix multiply from dot products
sr1.sourceMask = sr2.sourceMask = 7;
sb.AppendFormat("{0} = vec3(dot({1},{2}), dot({1},{3}), dot({1},{4})); // m33", dr.ToGLSL(), sr1.ToGLSL(true),
sr2.ToGLSL(true, 0),
sr2.ToGLSL(true, 1),
sr2.ToGLSL(true, 2)
);
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4, 0);
map.Add(sr2, RegisterUsage.Vector4, 1);
map.Add(sr2, RegisterUsage.Vector4, 2);
}
}
break;
case 0x18: // m44
{
var existingUsage = map.GetUsage(sr2);
if (existingUsage != RegisterUsage.Vector4)
{
sb.AppendFormat("{0} = {1} * {2}; // m44", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(false));
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Matrix44);
}
else
{
// compose the matrix multiply from dot products
sr1.sourceMask = sr2.sourceMask = 0xF;
sb.AppendFormat("{0} = vec4(dot({1},{2}), dot({1},{3}), dot({1},{4}, dot({1},{5})); // m44", dr.ToGLSL(), sr1.ToGLSL(true),
sr2.ToGLSL(true, 0),
sr2.ToGLSL(true, 1),
sr2.ToGLSL(true, 2),
sr2.ToGLSL(true, 3)
);
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4, 0);
map.Add(sr2, RegisterUsage.Vector4, 1);
map.Add(sr2, RegisterUsage.Vector4, 2);
map.Add(sr2, RegisterUsage.Vector4, 3);
}
}
break;
case 0x19: // m34
{
// prevent w from being written for a m34
dr.mask &= 7;
var existingUsage = map.GetUsage(sr2);
if (existingUsage != RegisterUsage.Vector4)
{
sb.AppendFormat("{0} = {1} * {2}; // m34", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(false));
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Matrix44);
}
else
{
// compose the matrix multiply from dot products
sr1.sourceMask = sr2.sourceMask = 0xF;
sb.AppendFormat("{0} = vec3(dot({1},{2}), dot({1},{3}), dot({1},{4}); // m34", dr.ToGLSL(), sr1.ToGLSL(true),
sr2.ToGLSL(true, 0),
sr2.ToGLSL(true, 1),
sr2.ToGLSL(true, 2)
);
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4, 0);
map.Add(sr2, RegisterUsage.Vector4, 1);
map.Add(sr2, RegisterUsage.Vector4, 2);
}
}
break;
case 0x27: // kill / discard
sb.AppendFormat("if (any(lessThan({0}, vec4(0)))) discard;", sr1.ToGLSL());
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x28: // tex
SamplerReg sampler = SamplerReg.Parse(source2, programType);
switch (sampler.d)
{
case 0: // 2d texture
sr1.sourceMask = 0x3;
sb.AppendFormat("{0} = texture2D({2}, {1}); // tex", dr.ToGLSL(), sr1.ToGLSL(), sampler.ToGLSL());
map.Add(sampler, RegisterUsage.Sampler2D);
break;
case 1: // cube texture
sr1.sourceMask = 0x7;
sb.AppendFormat("{0} = textureCube({2}, {1}); // tex", dr.ToGLSL(), sr1.ToGLSL(), sampler.ToGLSL());
map.Add(sampler, RegisterUsage.SamplerCube);
break;
}
//sb.AppendFormat("{0} = vec4(0,1,0,1);", dr.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
if (outSamplers != null)
{
// add sampler state to output list for caller
outSamplers[sampler.n] = sampler.ToSamplerState();
}
break;
case 0x29: // sge
sr1.sourceMask = sr2.sourceMask = 0xF; // sge only supports vec4
sb.AppendFormat("{0} = vec4(greaterThanEqual({1}, {2})){3}; // ste", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(), dr.GetWriteMask());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x2A: // slt
sr1.sourceMask = sr2.sourceMask = 0xF; // slt only supports vec4
sb.AppendFormat("{0} = vec4(lessThan({1}, {2})){3}; // slt", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(), dr.GetWriteMask());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x2C: // seq
sr1.sourceMask = sr2.sourceMask = 0xF; // seq only supports vec4
sb.AppendFormat("{0} = vec4(equal({1}, {2})){3}; // seq", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(), dr.GetWriteMask());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x2D: // sne
sr1.sourceMask = sr2.sourceMask = 0xF; // sne only supports vec4
sb.AppendFormat("{0} = vec4(notEqual({1}, {2})){3}; // sne", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(), dr.GetWriteMask());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
default:
//sb.AppendFormat ("unsupported opcode" + opcode);
throw new NotSupportedException("Opcode " + opcode);
}
sb.AppendLine();
}
#if PLATFORM_MONOMAC
var glslVersion = 120;
#elif PLATFORM_MONOTOUCH
var glslVersion = 100; // Actually this is glsl 1.20 but in gles it's 1.0
#endif
// combine parts into final progam
var glsl = new StringBuilder();
glsl.AppendFormat("// AGAL {0} shader\n", (programType == ProgramType.Vertex) ? "vertex" : "fragment");
glsl.AppendFormat("#version {0}\n", glslVersion);
#if PLATFORM_MONOTOUCH
// Required to set the default precision of vectors
glsl.Append("precision mediump float;\n");
#endif
glsl.Append(map.ToGLSL(false));
if (programType == ProgramType.Vertex)
{
// this is needed for flipping render textures upside down
glsl.AppendLine("uniform vec4 vcPositionScale;");
}
glsl.AppendLine("void main() {");
glsl.Append(map.ToGLSL(true));
glsl.Append(sb.ToString());
if (programType == ProgramType.Vertex)
{
// this is needed for flipping render textures upside down
glsl.AppendLine("gl_Position *= vcPositionScale;");
}
glsl.AppendLine("}");
// System.Console.WriteLine(glsl);
return(glsl.ToString());;
}
public static string ConvertToGLSL (ByteArray agal, textures.SamplerState[] outSamplers)
{
agal.position = 0;
int magic = agal.readByte ();
if (magic != 0xA0) {
throw new InvalidOperationException ("Magic value must be 0xA0, may not be AGAL");
}
int version = agal.readInt ();
if (version != 1) {
throw new InvalidOperationException ("Version must be 1");
}
int shaderTypeId = agal.readByte ();
if (shaderTypeId != 0xA1) {
throw new InvalidOperationException ("Shader type id must be 0xA1");
}
ProgramType programType = (agal.readByte () == 0) ? ProgramType.Vertex : ProgramType.Fragment;
var map = new RegisterMap();
var sb = new StringBuilder();
while (agal.position < agal.length) {
// fetch instruction info
int opcode = agal.readInt();
uint dest = (uint)agal.readInt();
ulong source1 = ReadUInt64(agal);
ulong source2 = ReadUInt64(agal);
// sb.Append("\t");
// sb.AppendFormat("// opcode:{0:X} dest:{1:X} source1:{2:X} source2:{3:X}\n", opcode,
// dest, source1, source2);
// parse registers
var dr = DestReg.Parse(dest,programType);
var sr1 = SourceReg.Parse(source1,programType, dr.mask);
var sr2 = SourceReg.Parse(source2,programType, dr.mask);
// switch on opcode and emit GLSL
sb.Append("\t");
switch (opcode)
{
case 0x00: // mov
sb.AppendFormat("{0} = {1}; // mov", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x01: // add
sb.AppendFormat("{0} = {1} + {2}; // add", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x02: // sub
sb.AppendFormat("{0} = {1} - {2}; // sub", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x03: // mul
sb.AppendFormat("{0} = {1} * {2}; // mul", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x04: // div
sb.AppendFormat("{0} = {1} / {2}; // div", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x05: // rcp
sb.AppendFormat("{0} = vec4(1) / {1}; // rcp (untested)", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x06: // min
sb.AppendFormat("{0} = min({1}, {2}); // min", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x07: // max
sb.AppendFormat("{0} = max({1}, {2}); // max", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x08: // frc
sb.AppendFormat("{0} = fract({1}); // frc", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x09: // sqrt
sb.AppendFormat("{0} = sqrt({1}); // sqrt", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0A: // rsq
sb.AppendFormat("{0} = inversesqrt({1}); // rsq", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0B: // pow
sb.AppendFormat("{0} = pow({1}, {2}); // pow", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x0C: // log
sb.AppendFormat("{0} = log2({1}); // log", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0D: // exp
sb.AppendFormat("{0} = exp2({1}); // exp", dr.ToGLSL(), sr1.ToGLSL());
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0E: // normalize
sb.AppendFormat("{0} = normalize({1}); // normalize", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x0F: // sin
sb.AppendFormat("{0} = sin({1}); // sin", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x10: // cos
sb.AppendFormat("{0} = cos({1}); // cos", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x11: // crs
sr1.sourceMask = sr2.sourceMask = 7; // adjust source mask for xyz input to dot product
sb.AppendFormat("{0} = cross(vec3({1}), vec3({2})); // crs", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x12: // dp3
sr1.sourceMask = sr2.sourceMask = 7; // adjust source mask for xyz input to dot product
sb.AppendFormat("{0} = dot(vec3({1}), vec3({2})); // dp3", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x13: // dp4
sr1.sourceMask = sr2.sourceMask = 0xF; // adjust source mask for xyzw input to dot product
sb.AppendFormat("{0} = dot(vec4({1}), vec4({2})); // dp4", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x14: // abs
sb.AppendFormat("{0} = abs({1}); // abs", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x15: // neg
sb.AppendFormat("{0} = -{1}; // neg", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x16: // saturate
sb.AppendFormat("{0} = clamp({1}, 0.0, 1.0); // saturate", dr.ToGLSL(), sr1.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x17: // m33
{
var existingUsage = map.GetUsage(sr2);
if (existingUsage != RegisterUsage.Vector4)
{
sb.AppendFormat("{0} = {1} * mat3({2}); // m33", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(false) );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Matrix44); // 33?
}
else
{
// compose the matrix multiply from dot products
sr1.sourceMask = sr2.sourceMask = 7;
sb.AppendFormat("{0} = vec3(dot({1},{2}), dot({1},{3}), dot({1},{4})); // m33", dr.ToGLSL(), sr1.ToGLSL(true),
sr2.ToGLSL(true,0),
sr2.ToGLSL(true,1),
sr2.ToGLSL(true,2)
);
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4, 0);
map.Add(sr2, RegisterUsage.Vector4, 1);
map.Add(sr2, RegisterUsage.Vector4, 2);
}
}
break;
case 0x18: // m44
{
var existingUsage = map.GetUsage(sr2);
if (existingUsage != RegisterUsage.Vector4)
{
sb.AppendFormat("{0} = {1} * {2}; // m44", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(false) );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Matrix44);
}
else
{
// compose the matrix multiply from dot products
sr1.sourceMask = sr2.sourceMask = 0xF;
sb.AppendFormat("{0} = vec4(dot({1},{2}), dot({1},{3}), dot({1},{4}, dot({1},{5})); // m44", dr.ToGLSL(), sr1.ToGLSL(true),
sr2.ToGLSL(true,0),
sr2.ToGLSL(true,1),
sr2.ToGLSL(true,2),
sr2.ToGLSL(true,3)
);
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4, 0);
map.Add(sr2, RegisterUsage.Vector4, 1);
map.Add(sr2, RegisterUsage.Vector4, 2);
map.Add(sr2, RegisterUsage.Vector4, 3);
}
}
break;
case 0x19: // m34
{
// prevent w from being written for a m34
dr.mask &= 7;
var existingUsage = map.GetUsage(sr2);
if (existingUsage != RegisterUsage.Vector4)
{
sb.AppendFormat("{0} = {1} * {2}; // m34", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(false) );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Matrix44);
}
else
{
// compose the matrix multiply from dot products
sr1.sourceMask = sr2.sourceMask = 0xF;
sb.AppendFormat("{0} = vec3(dot({1},{2}), dot({1},{3}), dot({1},{4}); // m34", dr.ToGLSL(), sr1.ToGLSL(true),
sr2.ToGLSL(true,0),
sr2.ToGLSL(true,1),
sr2.ToGLSL(true,2)
);
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4, 0);
map.Add(sr2, RegisterUsage.Vector4, 1);
map.Add(sr2, RegisterUsage.Vector4, 2);
}
}
break;
case 0x27: // kill / discard
sb.AppendFormat("if (any(lessThan({0}, vec4(0)))) discard;", sr1.ToGLSL() );
map.Add(sr1, RegisterUsage.Vector4);
break;
case 0x28: // tex
SamplerReg sampler = SamplerReg.Parse(source2, programType);
switch (sampler.d)
{
case 0: // 2d texture
sr1.sourceMask = 0x3;
sb.AppendFormat("{0} = texture2D({2}, {1}); // tex", dr.ToGLSL(), sr1.ToGLSL(), sampler.ToGLSL() );
map.Add(sampler, RegisterUsage.Sampler2D);
break;
case 1: // cube texture
sr1.sourceMask = 0x7;
sb.AppendFormat("{0} = textureCube({2}, {1}); // tex", dr.ToGLSL(), sr1.ToGLSL(), sampler.ToGLSL() );
map.Add(sampler, RegisterUsage.SamplerCube);
break;
}
//sb.AppendFormat("{0} = vec4(0,1,0,1);", dr.ToGLSL() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
if (outSamplers != null)
{
// add sampler state to output list for caller
outSamplers[sampler.n] = sampler.ToSamplerState();
}
break;
case 0x29: // sge
sr1.sourceMask = sr2.sourceMask = 0xF; // sge only supports vec4
sb.AppendFormat("{0} = vec4(greaterThanEqual({1}, {2})){3}; // ste", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(), dr.GetWriteMask() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x2A: // slt
sr1.sourceMask = sr2.sourceMask = 0xF; // slt only supports vec4
sb.AppendFormat("{0} = vec4(lessThan({1}, {2})){3}; // slt", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(), dr.GetWriteMask() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x2C: // seq
sr1.sourceMask = sr2.sourceMask = 0xF; // seq only supports vec4
sb.AppendFormat("{0} = vec4(equal({1}, {2})){3}; // seq", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(), dr.GetWriteMask() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
case 0x2D: // sne
sr1.sourceMask = sr2.sourceMask = 0xF; // sne only supports vec4
sb.AppendFormat("{0} = vec4(notEqual({1}, {2})){3}; // sne", dr.ToGLSL(), sr1.ToGLSL(), sr2.ToGLSL(), dr.GetWriteMask() );
map.Add(dr, RegisterUsage.Vector4);
map.Add(sr1, RegisterUsage.Vector4);
map.Add(sr2, RegisterUsage.Vector4);
break;
default:
//sb.AppendFormat ("unsupported opcode" + opcode);
throw new NotSupportedException("Opcode " + opcode);
}
sb.AppendLine();
}
#if PLATFORM_MONOMAC
var glslVersion = 120;
#elif PLATFORM_MONOTOUCH
var glslVersion = 100; // Actually this is glsl 1.20 but in gles it's 1.0
#endif
// combine parts into final progam
var glsl = new StringBuilder();
glsl.AppendFormat("// AGAL {0} shader\n", (programType == ProgramType.Vertex) ? "vertex" : "fragment");
glsl.AppendFormat("#version {0}\n", glslVersion);
#if PLATFORM_MONOTOUCH
// Required to set the default precision of vectors
glsl.Append("precision mediump float;\n");
#endif
glsl.Append (map.ToGLSL(false));
if (programType == ProgramType.Vertex) {
// this is needed for flipping render textures upside down
glsl.AppendLine("uniform vec4 vcPositionScale;");
}
glsl.AppendLine("void main() {");
glsl.Append (map.ToGLSL(true));
glsl.Append(sb.ToString());
if (programType == ProgramType.Vertex) {
// this is needed for flipping render textures upside down
glsl.AppendLine("gl_Position *= vcPositionScale;");
}
glsl.AppendLine("}");
// System.Console.WriteLine(glsl);
return glsl.ToString();;
}