private string ProcessTechniqueVS(SourceShader shader, HlslTechnique technique, AsmTechnique asmTechnique, ShaderExtension extension, Platform platform)
{
HlslMethod vs = shader.GetMethod(technique.VertexShaderMethodName, platform);
HlslMethod ps = shader.GetMethod(technique.PixelShaderMethodName, platform);
if (vs == null) throw new CompileException(string.Format("Unabled to find declaration for vertex shader method '{0}'", technique.VertexShaderMethodName));
if (ps == null) throw new CompileException(string.Format("Unabled to find declaration for pixel shader method '{0}'", technique.PixelShaderMethodName));
string nameAppend = "_" + Guid.NewGuid().ToString("N") + "_" + extension.ToString();
string blendName = "__blend_weights__GEN";
string indicesName = "__blend_indices__GEN";
//generated merged matrices
StringBuilder matrixGen = new StringBuilder();
foreach (var remap in matrixRemap.Values)
{
if (remap.BaseName != null) // this will be null for the world matrix
{
//find the matching register in the technique
string matrixType;
string matrixExpansion = GetMatrixRankExpansion(remap.Name, asmTechnique, out matrixType);
if (extension == ShaderExtension.Instancing)
matrixGen.AppendFormat("\tfloat4x4 {0} = float4x4(({4})mul({1},{2}){3});", remap.RemapTo, worldMatrixName, remap.BaseName, matrixExpansion, matrixType);
if (extension == ShaderExtension.Blending)
matrixGen.AppendFormat("\tfloat4x4 {0} = float4x4(({4})mul({1},{2}){3});", remap.RemapTo, worldMatrixName, remap.Name, matrixExpansion, matrixType);
matrixGen.AppendLine();
}
}
//create the method signatures
footer.AppendLine();
bool multiArg = false;
StringBuilder argList = new StringBuilder();
int argIndex = -1;
bool transposeWorldMatrix = false;
foreach (var element in vs.HlslShader.Elements)
{
if (element.Statement == vs.Name)
{
footer.Append(vs.Name);
footer.Append(nameAppend);
}
else
{
if (element.Statement == "(" || element.Statement == ",")
argIndex = 0;
else
{
argIndex++;
if (element.Statement == "out" ||
element.Statement == "in" ||
element.Statement == "inout" ||
element.Statement == "uniform" ||
element.Statement == "const")
argIndex--;
if (argIndex != -1 && argIndex == 2)
{
if (argList.Length > 0)
argList.Append(", ");
argList.Append(element.Statement);
}
}
if (element.Statement == ")")
{
argIndex = -1;
if (methodNames.TryGetValue(vs.Name, out multiArg) && multiArg)
footer.Append(", ");
if (extension == ShaderExtension.Instancing)
{
footer.Append("float4x4 " + worldMatrixName + "_transpose : POSITION12");
transposeWorldMatrix = true;
}
if (extension == ShaderExtension.Blending)
{
footer.AppendFormat("float4 {0} : BLENDWEIGHT, int4 {1} : BLENDINDICES", blendName, indicesName);
}
}
footer.Append(element);
footer.Append(' ');
}
}
footer.AppendLine();
footer.AppendLine("{");
if (transposeWorldMatrix)
{
footer.AppendLine("\tfloat4x4 " + worldMatrixName + " = transpose(" + worldMatrixName + "_transpose);");
}
if (extension == ShaderExtension.Blending)
{
string calculation =
@" float4x4 {3}
= transpose(float4x4(
{0}[{1}.x * 3 + 0] * {2}.x + {0}[{1}.y * 3 + 0] * {2}.y + {0}[{1}.z * 3 + 0] * {2}.z + {0}[{1}.w * 3 + 0] * {2}.w,
{0}[{1}.x * 3 + 1] * {2}.x + {0}[{1}.y * 3 + 1] * {2}.y + {0}[{1}.z * 3 + 1] * {2}.z + {0}[{1}.w * 3 + 1] * {2}.w,
{0}[{1}.x * 3 + 2] * {2}.x + {0}[{1}.y * 3 + 2] * {2}.y + {0}[{1}.z * 3 + 2] * {2}.z + {0}[{1}.w * 3 + 2] * {2}.w,
float4(0,0,0,1)));";
footer.AppendFormat(calculation, blendMatricesName, indicesName, blendName, worldMatrixName);
footer.AppendLine();
}
footer.Append(matrixGen);
footer.AppendFormat("\t{4}{0}({1}{2}{3});", ToInternalMethodName(vs.Name, extension), methodCallAppend, multiArg ? ", " : "", argList, vs.HasReturnValue ? "return " : "");
footer.AppendLine();
footer.AppendLine("}");
return vs.Name + nameAppend;
}
void TranslateMatrices(HlslStructure.ShaderStatement[] elements, int callDepth, ShaderExtension extension)
{
bool isInstancing = extension == ShaderExtension.Instancing;
List<int> skipFinalRemappingIndices = new List<int>();
int processingMul = 0, depth = 0, arg = 0;
int argStart = 0, argEnd = 0;
int remapArg = -1;
int remapIndex = 0;
MatrixMapping remapping = new MatrixMapping();
Stack<int> mulStart = new Stack<int>();
Stack<int> mulDepth = new Stack<int>();
Stack<int> mulArg = new Stack<int>();
Stack<int> mulArgStart = new Stack<int>();
Stack<int> mulArgEnd = new Stack<int>();
Stack<int> mulRemap = new Stack<int>();
Stack<int> mulRemapIdx = new Stack<int>();
Stack<MatrixMapping> mulRemapping = new Stack<MatrixMapping>();
for (int i = 0; i < elements.Length; i++)
{
string line = elements[i].Statement;
if (line == "mul")
{
processingMul++;
mulStart.Push(i);
mulDepth.Push(depth);
mulArg.Push(arg);
mulArgEnd.Push(argEnd);
mulArgStart.Push(argStart);
mulRemap.Push(remapArg);
mulRemapping.Push(remapping);
mulRemapIdx.Push(remapIndex);
depth = 0;
arg = 0;
argStart = 0;
argEnd = 0;
remapArg = -1;
remapIndex = 0;
remapping = new MatrixMapping();
}
MatrixMapping mapping;
if (processingMul > 0 && depth == 1 && matrixRemap.TryGetValue(line, out mapping) && (mapping.BaseName != null || !isInstancing))
{
remapArg = arg;
remapping = mapping;
remapIndex = i;
}
if (processingMul > 0 && line == "(")
{
if (depth == 0)
argStart = i;
depth++;
}
if (processingMul > 0 && depth == 1 && line == ",")
{
if (depth == 1)
argEnd = i;
arg++;
}
if (processingMul > 0 && line == ")")
{
depth--;
if (depth == 0)
{
string baseMatrix = remapping.Name;
if (isInstancing)
baseMatrix = remapping.BaseName;
string prefix = "";
int startPrefix = -1;
if (remapArg == 1)
startPrefix = argEnd;
if (remapArg == 0)
startPrefix = argStart;
if (remapIndex > startPrefix && startPrefix != -1)
{
for (int p = startPrefix + 1; p < remapIndex; p++)
prefix += elements[p].Statement + " ";
}
//right, see if the args need modifying.
if (remapArg == 1)
{
//a known remapping matrix was used.
var element = elements[remapIndex];
elements[remapIndex] = new HlslStructure.ShaderStatement(baseMatrix, element.Line);
element = elements[argStart];
elements[argStart] = new HlslStructure.ShaderStatement("(mul(", element.Line);
element = elements[argEnd];
elements[argEnd] = new HlslStructure.ShaderStatement("," + prefix + worldMatrixName + "),", element.Line);
if (!isInstancing)
skipFinalRemappingIndices.Add(remapIndex);
}
if (remapArg == 0) // transpose
{
//a known remapping matrix was used.
var element = elements[remapIndex];
elements[remapIndex] = new HlslStructure.ShaderStatement(baseMatrix, element.Line);
element = elements[argEnd];
elements[argEnd] = new HlslStructure.ShaderStatement(",mul(" + prefix + worldMatrixName + ",", element.Line);
element = elements[i];
elements[i] = new HlslStructure.ShaderStatement("))", element.Line);
if (!isInstancing)
skipFinalRemappingIndices.Add(remapIndex);
}
processingMul--;
mulStart.Pop();
depth = mulDepth.Pop();
arg = mulArg.Pop();
argEnd = mulArgEnd.Pop();
argStart = mulArgStart.Pop();
remapArg = mulRemap.Pop();
remapping = mulRemapping.Pop();
remapIndex = mulRemapIdx.Pop();
}
}
}
//find unremapped matrices
if (callDepth > 0)
{
for (int i = 0; i < elements.Length; i++)
{
//it is intended that this matrix reference is not modified.
if (!isInstancing && skipFinalRemappingIndices.Contains(i))
continue;
MatrixMapping mapping;
if (matrixRemap.TryGetValue(elements[i].Statement, out mapping))
elements[i] = new HlslStructure.ShaderStatement(mapping.RemapTo, elements[i].Line);
}
}
}
void TranslateMethodNames(HlslStructure.ShaderStatement[] elements, int callDepth, ShaderExtension extension)
{
for (int i = 0; i < elements.Length; i++)
{
string methodName = elements[i].Statement;
bool multArg;
if (methodNames.TryGetValue(methodName, out multArg))
{
BuildMethod(methodName, extension);
//find the method start
for (int n = i+1; n < elements.Length; n++)
{
if (elements[n] == "(")
{
string argAppend = multArg ? ", " : "";
//append the method signatures
if (callDepth == 0)
elements[n] = new HlslStructure.ShaderStatement("(" + this.methodSignatureAppend + argAppend, elements[n].Line);
else
elements[n] = new HlslStructure.ShaderStatement("(" + this.methodCallAppend + argAppend, elements[n].Line);
elements[i] = new HlslStructure.ShaderStatement(ToInternalMethodName(methodName,extension), elements[i].Line);
break;
}
}
}
}
}
void BuildMethod(string methodName, ShaderExtension extension)
{
if (methodBuilt.ContainsKey(methodName) == false)
return;
if (methodBuilt[methodName])
return;
StringBuilder sb = new StringBuilder();
foreach (var method in methodList)
{
if (method.Name == methodName)
{
methodBuilt[methodName] = true;
method.HlslShader.ToString(sb, 0, this, null, false, false);
}
}
this.builtShader.Append(sb);
}
private void BuildTechniqueMethod(SourceShader shader, ShaderExtension extension)
{
methodExtractionExtension = extension;
foreach (var method in methodList)
{
if (methodBuilt.ContainsKey(method.Name) == false)
methodBuilt.Add(method.Name, false);
}
foreach (var tech in shader.GetAllTechniques())
{
BuildMethod(tech.VertexShaderMethodName, extension);
}
methodBuilt.Clear();
UnwindBackup(shader.HlslShader);
}
static string ToInternalMethodName(string name, ShaderExtension extension)
{
return string.Format("__{0}__{1}_GENCALL", name, extension);
}