internal override void WriteSourceCode( System.IO.StreamWriter stream, Program program )
{
var functionList = program.Functions;
var parameterList = program.Parameters;
//Generate source code header
WriteProgramTitle( stream, program );
stream.WriteLine();
WriteProgramDependencies( stream, program );
stream.WriteLine();
WriteUniformParametersTitle( stream, program );
stream.WriteLine();
foreach ( var itUniformParam in parameterList )
{
WriteUniformParameter( stream, itUniformParam );
stream.WriteLine( ";" );
}
stream.WriteLine();
foreach ( var curFunction in functionList )
{
bool needToTranslateHlsl4Color = false;
Parameter colorParameter;
WriteFunctionTitle( stream, curFunction );
WriteFunctionDeclaration( stream, curFunction, out needToTranslateHlsl4Color, out colorParameter );
stream.WriteLine( "{" );
var localParams = curFunction.LocalParameters;
foreach ( var itParam in localParams )
{
stream.Write( "\t" );
WriteLocalParameter( stream, itParam );
stream.WriteLine( ";" );
}
if ( needToTranslateHlsl4Color )
{
stream.WriteLine( "\t" );
WriteLocalParameter( stream, colorParameter );
stream.WriteLine( ";" );
stream.WriteLine();
stream.WriteLine( "\tFFP_Assign(iHlsl4Color_0, " + colorParameter.Name + ");" );
}
curFunction.SortAtomInstances();
var atomInstances = curFunction.AtomInstances;
foreach ( var itAtom in atomInstances )
{
WriteAtomInstance( stream, itAtom );
}
stream.WriteLine( "}" );
}
stream.WriteLine();
}
internal override void WriteSourceCode( System.IO.StreamWriter stream, Program program )
{
var functionList = program.Functions;
var parameterList = program.Parameters;
//Generate source code header
WriteProgramTitle( stream, program );
stream.WriteLine();
//Generate dependencies
WriteProgramDependencies( stream, program );
stream.WriteLine();
//Generate global variable code.
WriteUniformParametersTitle( stream, program );
stream.WriteLine();
foreach ( var itUniformParam in parameterList )
{
WriteUniformParameter( stream, itUniformParam );
stream.Write( ";\n" );
}
stream.WriteLine();
//Write program function(s)
foreach ( var curFunction in functionList )
{
Parameter colorParameter;
WriteFunctionTitle( stream, curFunction );
WriteFunctionDeclaration( stream, curFunction, out colorParameter );
stream.Write( "{\n" );
//Write local parameters
var localParams = curFunction.LocalParameters;
foreach ( var itParam in localParams )
{
stream.Write( "\t" );
WriteLocalParameter( stream, itParam );
stream.Write( ";\n" );
}
//Sort and write function atoms
curFunction.SortAtomInstances();
var atomInstances = curFunction.AtomInstances;
foreach ( var itAtom in atomInstances )
{
WriteAtomInstance( stream, itAtom );
}
stream.Write( "}\n" );
}
stream.WriteLine();
}
private void BindTextureSampler( Program cpuProgram, GpuProgram gpuProgram )
{
var gpuParams = gpuProgram.DefaultParameters;
var progParams = cpuProgram.Parameters;
//Bind the samplers
foreach ( var curParam in progParams )
{
if ( curParam.IsSampler )
{
gpuParams.SetNamedConstant( curParam.Name, curParam.Index );
}
}
}
private void BindTextureSamplers( Program cpuProgram, GpuProgram gpuProgram )
{
var gpuParams = gpuProgram.DefaultParameters;
var progParams = cpuProgram.Parameters;
//bind the samplers
foreach ( var curParam in progParams )
{
if ( curParam.IsSampler )
{
// The optimizer may remove some unnecessary parameters, so we should ignore them
gpuParams.IgnoreMissingParameters = true;
gpuParams.SetNamedConstant( curParam.Name, curParam.Index );
}
}
}
private void WriteProgramDependencies( StreamWriter stream, Program program )
{
stream.WriteLine( "//-----------------------------------------------------------------------------" );
stream.WriteLine( "// PROGRAM DEPENDENCIES" );
stream.WriteLine( "//-----------------------------------------------------------------------------" );
for ( int i = 0; i < program.DependencyCount; i++ )
{
string curDependency = program.GetDependency( i );
stream.WriteLine( "#include " + '\"' + curDependency + "." + TargetLanguage + '\"' );
}
}
private bool AddPSInvocation( Program psProgram, int groupOrder, ref int internalCounter )
{
Function psMain = psProgram.EntryPointFunction;
FunctionInvocation curFuncInvocation = null;
ShadowTextureParams splitParams0 = this.shadowTextureParamsList[ 0 ];
ShadowTextureParams splitParams1 = this.shadowTextureParamsList[ 1 ];
ShadowTextureParams splitParams2 = this.shadowTextureParamsList[ 2 ];
//Compute shadow factor
curFuncInvocation = new FunctionInvocation( SGXFuncComputeShadowColor3, groupOrder, internalCounter++ );
curFuncInvocation.PushOperand( this.psInDepth, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( this.psSplitPoints, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( splitParams0.PSInLightPosition, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( splitParams1.PSInLightPosition, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( splitParams2.PSInLightPosition, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( splitParams0.TextureSampler, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( splitParams1.TextureSampler, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( splitParams2.TextureSampler, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( splitParams0.InvTextureSize, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( splitParams1.InvTextureSize, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( splitParams2.InvTextureSize, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( this.psLocalShadowFactor, Operand.OpSemantic.Out );
psMain.AddAtomInstance( curFuncInvocation );
//Apply shadow factor on diffuse color
curFuncInvocation = new FunctionInvocation( SGXFuncApplyShadowFactorDiffuse, groupOrder, internalCounter++ );
curFuncInvocation.PushOperand( this.psDerivedSceneColor, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( this.psDiffuse, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( this.psLocalShadowFactor, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( this.psLocalShadowFactor, Operand.OpSemantic.Out );
psMain.AddAtomInstance( curFuncInvocation );
//Apply shadow factor on specular color
curFuncInvocation = new FunctionInvocation( SGXFuncModulateScalar, groupOrder, internalCounter++ );
curFuncInvocation.PushOperand( this.psLocalShadowFactor, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( this.psSpecular, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( this.psSpecular, Operand.OpSemantic.Out );
psMain.AddAtomInstance( curFuncInvocation );
//Assign the local diffuse to output diffuse
curFuncInvocation = new FunctionInvocation( FFPRenderState.FFPFuncAssign, groupOrder, internalCounter++ );
curFuncInvocation.PushOperand( this.psDiffuse, Operand.OpSemantic.In );
curFuncInvocation.PushOperand( this.psOutDiffuse, Operand.OpSemantic.Out );
psMain.AddAtomInstance( curFuncInvocation );
return true;
}
private void BindSubShaders( Program program, GpuProgram gpuProgram )
{
if ( program.DependencyCount > 0 )
{
// Get all attached shaders so we do not attach shaders twice.
// maybe GLSLProgram should take care of that ( prevent add duplicate shaders )
string attachedShaders = string.Empty; //TODO: gpuProgram.GetParameter("attach");
string subSharedDef = string.Empty;
for ( int i = 0; i < program.DependencyCount; i++ )
{
// Here we append _VS and _FS to the library shaders (so max each lib shader
// is compiled twice once as vertex and once as fragment shader)
string subShaderName = program.GetDependency( i );
if ( program.Type == GpuProgramType.Vertex )
{
subShaderName += "_VS";
}
else
{
subShaderName += "_FS";
}
//Check if the library shader already compiled
if ( !HighLevelGpuProgramManager.Instance.ResourceExists( subShaderName ) )
{
//Create the library shader
HighLevelGpuProgram subGpuProgram =
HighLevelGpuProgramManager.Instance.CreateProgram( subShaderName,
ResourceGroupManager.
DefaultResourceGroupName,
TargetLanguage, program.Type );
//Set the source name
string sourceName = program.GetDependency( i ) + "." + TargetLanguage;
subGpuProgram.SourceFile = sourceName;
//If we have compiler errors than stop processing
if ( subGpuProgram.HasCompileError )
{
throw new AxiomException( "Could not compile shader library from the source file: " +
sourceName );
}
this.libraryPrograms.Add( subShaderName );
}
//Check if the lib shader already attached to this shader
if ( attachedShaders.Contains( subShaderName ) )
{
subSharedDef += subShaderName + " ";
}
}
//Check if we have something to attach
if ( subSharedDef.Length > 0 )
{
var nvpl = new Axiom.Collections.NameValuePairList();
nvpl.Add( "attach", subSharedDef );
gpuProgram.SetParameters( nvpl );
}
}
}
internal override void WriteSourceCode( System.IO.StreamWriter stream, Program program )
{
var gpuType = program.Type;
if ( gpuType == GpuProgramType.Geometry )
{
throw new Core.AxiomException( "Geometry Programs not supported in GLSL ES writer" );
}
this.fragInputParams.Clear();
var functionList = program.Functions;
var parameterList = program.Parameters;
// Write the current version (this forces the driver to fulfill the glsl es standard)
stream.WriteLine( "#version" + this.glslVersion.ToString() );
//Default precision declaration is required in fragment and vertex shaders.
stream.WriteLine( "precision highp float" );
stream.WriteLine( "precision highp int" );
//Generate source code header
WriteProgramTitle( stream, program );
stream.WriteLine();
//Embed depndencies.
WriteProgramDependencies( stream, program );
stream.WriteLine();
//Generate global variable code.
WriteUniformParametersTitle( stream, program );
stream.WriteLine();
//Write the uniforms
foreach ( var uniformParams in parameterList )
{
stream.Write( "uniform\t" );
stream.Write( this.gpuConstTypeMap[ uniformParams.Type ] );
stream.Write( "\t" );
stream.Write( uniformParams.Name );
if ( uniformParams.IsArray )
{
stream.Write( "[" + uniformParams.Size.ToString() + "]" );
}
stream.WriteLine( ";" );
}
stream.WriteLine();
//Write program function(s)
foreach ( var curFunction in functionList )
{
WriteFunctionTitle( stream, curFunction );
this.inputToGLStatesMap.Clear();
WriteInputParameters( stream, curFunction, gpuType );
WriteOutParameters( stream, curFunction, gpuType );
stream.WriteLine( "void main() {" );
if ( gpuType == GpuProgramType.Fragment )
{
stream.WriteLine( "\tvec4 outputColor;" );
}
else if ( gpuType == GpuProgramType.Vertex )
{
stream.WriteLine( "\tvec4 outputPosition;" );
}
//Write local paraemters
var localParam = curFunction.LocalParameters;
foreach ( var itParam in localParam )
{
stream.Write( "\t" );
WriteLocalParameter( stream, itParam );
stream.WriteLine( ";" );
}
stream.WriteLine();
//sort function atoms
curFunction.SortAtomInstances();
var atomInstances = curFunction.AtomInstances;
foreach ( var itAtom in atomInstances )
{
var funcInvoc = (FunctionInvocation)itAtom;
int itOperand = 0;
int itOperandEnd = funcInvoc.OperandList.Count;
var localOs = new StringBuilder();
localOs.Append( "\t" + funcInvoc.FunctionName + "(" );
int curIndLevel = 0;
while ( itOperand != itOperandEnd )
{
Operand op = funcInvoc.OperandList[ itOperand ];
Operand.OpSemantic opSemantic = op.Semantic;
string paramName = op.Parameter.Name;
Parameter.ContentType content = op.Parameter.Content;
// Check if we write to a varying because the are only readable in fragment programs
if ( opSemantic == Operand.OpSemantic.Out || opSemantic == Operand.OpSemantic.InOut )
{
bool isVarying = false;
if ( gpuType == GpuProgramType.Fragment )
{
if ( this.fragInputParams.Contains( paramName ) )
{
//Declare the copy variable
string newVar = "local_" + paramName;
string tempVar = paramName;
isVarying = true;
// We stored the original values in the mFragInputParams thats why we have to replace the first var with o
// because all vertex output vars are prefixed with o in glsl the name has to match in the fragment program.
tempVar.Remove( 0 );
tempVar.Insert( 0, "o" );
//Declare the copy variable and assign the original
stream.WriteLine( "\t" + this.gpuConstTypeMap[ op.Parameter.Type ] + " " + newVar + " = " +
tempVar + ";\n" );
//Fromnow on we replace it automatic
this.inputToGLStatesMap.Add( paramName, newVar );
this.fragInputParams.Remove( paramName );
}
}
if ( !isVarying )
{
foreach ( var param in parameterList )
{
if ( CompareUniformByName( param, paramName ) )
{
string newVar = "local_" + paramName;
if ( this.inputToGLStatesMap.ContainsKey( newVar ) == false )
{
//Declare the copy variable and assign the original
stream.WriteLine( "\t" + this.gpuConstTypeMap[ param.Type ] + " " + newVar +
" = " + paramName + ";\n" );
//From now on we replace it automatic
this.inputToGLStatesMap.Add( paramName, newVar );
}
}
}
}
string newParam;
if ( this.inputToGLStatesMap.ContainsKey( paramName ) )
{
int mask = op.Mask; //our swizzle mask
//Here we insert the renamed param name
newParam = this.inputToGLStatesMap[ paramName ];
if ( mask != (int)Operand.OpMask.All )
{
newParam += "." + Operand.GetMaskAsString( mask );
}
// Now that every texcoord is a vec4 (passed as vertex attributes) we
// have to swizzle them according the desired type.
else if ( gpuType == GpuProgramType.Vertex &&
content == Parameter.ContentType.TextureCoordinate0 ||
content == Parameter.ContentType.TextureCoordinate1 ||
content == Parameter.ContentType.TextureCoordinate2 ||
content == Parameter.ContentType.TextureCoordinate3 ||
content == Parameter.ContentType.TextureCoordinate4 ||
content == Parameter.ContentType.TextureCoordinate5 ||
content == Parameter.ContentType.TextureCoordinate6 ||
content == Parameter.ContentType.TextureCoordinate7 )
{
//Now generate the swizzle mask according
// the type.
switch ( op.Parameter.Type )
{
case GpuProgramParameters.GpuConstantType.Float1:
newParam += ".x";
break;
case GpuProgramParameters.GpuConstantType.Float2:
newParam += ".xy";
break;
case GpuProgramParameters.GpuConstantType.Float3:
newParam += ".xyz";
break;
case GpuProgramParameters.GpuConstantType.Float4:
newParam += ".xyzw";
break;
default:
break;
}
}
}
else
{
newParam = op.ToString();
}
itOperand++;
//Prepare for the next operand
localOs.Append( newParam );
int opIndLevel = 0;
if ( itOperand != itOperandEnd )
{
opIndLevel = funcInvoc.OperandList[ itOperand ].IndirectionLevel;
}
if ( curIndLevel != 0 )
{
localOs.Append( ")" );
}
if ( curIndLevel < opIndLevel )
{
while ( curIndLevel < opIndLevel )
{
curIndLevel++;
localOs.Append( "[" );
}
}
else
{
while ( curIndLevel > opIndLevel )
{
curIndLevel--;
localOs.Append( "]" );
}
if ( opIndLevel != 0 )
{
localOs.Append( "][" );
}
else if ( itOperand != itOperandEnd )
{
localOs.Append( ", " );
}
}
if ( curIndLevel != 0 )
{
localOs.Append( "int(" );
}
}
//Write function call closer
localOs.AppendLine( ");" );
localOs.AppendLine();
stream.Write( localOs.ToString() );
}
}
if ( gpuType == GpuProgramType.Fragment )
{
stream.WriteLine( "\tgl_FragColor = outputColor;" );
}
else if ( gpuType == GpuProgramType.Vertex )
{
stream.WriteLine( "\tgl_Position = outputPosition;" );
}
stream.WriteLine( "}" );
}
stream.WriteLine();
}
private void WriteProgramDependencies( StreamWriter stream, Program program )
{
for ( int i = 0; i < program.DependencyCount; i++ )
{
string curDependency = program.GetDependency( i );
CacheDependencyFunctions( curDependency );
}
stream.WriteLine( "//-----------------------------------------------------------------------------" );
stream.WriteLine( "// PROGRAM DEPENDENCIES" );
stream.WriteLine();
var forwardDecl = new List<FunctionInvocation>();
var functionList = program.Functions;
int itFunction = 0;
Function curFunction = functionList[ 0 ];
var atomInstances = curFunction.AtomInstances;
int itAtom = 0;
int itAtomEnd = atomInstances.Count;
//Now iterate over all function atoms
for ( ; itAtom != itAtomEnd; itAtom++ )
{
//Skip non function invocation atom
if ( atomInstances[ itAtom ] is FunctionInvocation == false )
{
continue;
}
var funcInvoc = atomInstances[ itAtom ] as FunctionInvocation;
forwardDecl.Add( funcInvoc );
// Now look into that function for other non-builtin functions and add them to the declaration list
// Look for non-builtin functions
// Do so by assuming that these functions do not have several variations.
// Also, because GLSL is C based, functions must be defined before they are used
// so we can make the assumption that we already have this function cached.
//
// If we find a function, look it up in the map and write it out
DiscoverFunctionDependencies( funcInvoc, forwardDecl );
}
//Now remove duplicate declarations
forwardDecl.Sort();
forwardDecl = forwardDecl.Distinct( new FunctionInvocation.FunctionInvocationComparer() ).ToList();
for ( int i = 0; i < program.DependencyCount; i++ )
{
string curDependency = program.GetDependency( i );
foreach ( var key in this.definesMap.Keys )
{
if ( this.definesMap[ key ] == curDependency )
{
stream.Write( this.definesMap[ key ] );
stream.Write( "\n" );
}
}
}
// Parse the source shader and write out only the needed functions
foreach ( var it in forwardDecl )
{
var invoc = new FunctionInvocation( string.Empty, 0, 0, string.Empty );
string body = string.Empty;
//find the function in the cache
foreach ( var key in this.functionCacheMap.Keys )
{
if ( !( it == key ) )
{
continue;
}
invoc = key;
body = this.functionCacheMap[ key ];
break;
}
if ( invoc.FunctionName.Length > 0 )
{
//Write out the funciton name from the cached FunctionInvocation
stream.Write( invoc.ReturnType );
stream.Write( " " );
stream.Write( invoc.FunctionName );
stream.Write( "(" );
int itOperand = 0;
int itOperandEnd = invoc.OperandList.Count;
while ( itOperand != itOperandEnd )
{
Operand op = invoc.OperandList[ itOperand ];
Operand.OpSemantic opSemantic = op.Semantic;
string paramName = op.Parameter.Name;
int opMask = op.Mask;
GpuProgramParameters.GpuConstantType gpuType = GpuProgramParameters.GpuConstantType.Unknown;
switch ( opSemantic )
{
case Operand.OpSemantic.In:
stream.Write( "in " );
break;
case Operand.OpSemantic.Out:
stream.Write( "out " );
break;
case Operand.OpSemantic.InOut:
stream.Write( "inout " );
break;
default:
break;
}
//Swizzle masks are onluy defined for types like vec2, vec3, vec4
if ( opMask == (int)Operand.OpMask.All )
{
gpuType = op.Parameter.Type;
}
else
{
gpuType = Operand.GetGpuConstantType( opMask );
}
//We need a valid type otherwise glsl compilation will not work
if ( gpuType == GpuProgramParameters.GpuConstantType.Unknown )
{
throw new Core.AxiomException( "Cannot convert Operand.OpMask to GpuConstantType" );
}
stream.Write( this.gpuConstTypeMap[ gpuType ] + " " + paramName );
itOperand++;
//Prepare for the next operand
if ( itOperand != itOperandEnd )
{
stream.Write( ", " );
}
}
stream.WriteLine();
stream.WriteLine( "{" );
stream.WriteLine( body );
stream.WriteLine( "}" );
stream.WriteLine();
}
}
}
private void WriteForwardDeclarations( StreamWriter stream, Program program )
{
stream.WriteLine( "//-----------------------------------------------------------------------------" );
stream.WriteLine( "// FORWARD DECLARATIONS" );
stream.WriteLine( "//-----------------------------------------------------------------------------" );
var forwardDecl = new List<string>(); // hold all generated function declarations
var functionList = program.Functions;
foreach ( var curFunction in functionList )
{
var atomInstances = curFunction.AtomInstances;
for ( int i = 0; i < atomInstances.Count; i++ )
{
var itAtom = atomInstances[ i ];
//Skip non function invocation atoms
if ( !( itAtom is FunctionInvocation ) )
{
continue;
}
var funcInvoc = itAtom as FunctionInvocation;
int itOperator = 0;
int itOperatorEnd = funcInvoc.OperandList.Count;
//Start with function declaration
string funcDecl = funcInvoc.ReturnType + " " + funcInvoc.FunctionName + "(";
//Now iterate overall operands
while ( itOperator != itOperatorEnd )
{
Parameter param = funcInvoc.OperandList[ itOperator ].Parameter;
Operand.OpSemantic opSemantic = funcInvoc.OperandList[ itOperator ].Semantic;
int opMask = funcInvoc.OperandList[ itOperator ].Mask;
Axiom.Graphics.GpuProgramParameters.GpuConstantType gpuType =
GpuProgramParameters.GpuConstantType.Unknown;
//Write the semantic in, out, inout
switch ( opSemantic )
{
case Operand.OpSemantic.In:
funcDecl += "in ";
break;
case Operand.OpSemantic.Out:
funcDecl += "out ";
break;
case Operand.OpSemantic.InOut:
funcDecl += "inout ";
break;
default:
break;
}
//Swizzle masks are only defined fro types like vec2, vec3, vec4
if ( opMask == (int)Operand.OpMask.All )
{
gpuType = param.Type;
}
else
{
//Now we have to conver the mask to operator
gpuType = Operand.GetGpuConstantType( opMask );
}
//We need a valid type otherwise glsl compilation will not work
if ( gpuType == GpuProgramParameters.GpuConstantType.Unknown )
{
throw new Core.AxiomException( "Cannot convert Operand.OpMask to GpuConstantType" );
}
//Write the operand type.
funcDecl += this.gpuConstTypeMap[ gpuType ];
itOperator++;
//move over all operators with indirection
while ( ( itOperator != itOperatorEnd ) &&
( funcInvoc.OperandList[ itOperator ].IndirectionLevel != 0 ) )
{
itOperator++;
}
//Prepare for the next operand
if ( itOperator != itOperatorEnd )
{
funcDecl += ", ";
}
}
//Write function call closer.
funcDecl += ");\n";
//Push the generated declaration into the vector
//duplicate declarations will be removed later.
forwardDecl.Add( funcDecl );
}
}
//Now remove duplicate declaration, first we have to sort the vector.
forwardDecl.Sort();
forwardDecl = forwardDecl.Distinct().ToList();
foreach ( var it in forwardDecl )
{
stream.Write( it );
}
}
internal override void WriteSourceCode( System.IO.StreamWriter stream, Program program )
{
var gpuType = program.Type;
if ( gpuType == GpuProgramType.Geometry )
{
throw new Core.AxiomException( "Geometry Program not supported iin GLSL writer" );
}
this.fragInputParams.Clear();
var functionList = program.Functions;
var parameterList = program.Parameters;
// Write the current version (this force the driver to more fulfill the glsl standard)
stream.WriteLine( "#version " + this.glslVersion.ToString() );
//Generate source code header
WriteProgramTitle( stream, program );
stream.WriteLine();
//Write forward declarations
WriteForwardDeclarations( stream, program );
stream.WriteLine();
//Generate global variable code
WriteUniformParametersTitle( stream, program );
stream.WriteLine();
//Write the uniforms
foreach ( var uniformParam in parameterList )
{
stream.Write( "uniform\t" );
stream.Write( this.gpuConstTypeMap[ uniformParam.Type ] );
stream.Write( "\t" );
stream.Write( uniformParam.Name );
if ( uniformParam.IsArray )
{
stream.Write( "[" + uniformParam.Size.ToString() + "]" );
}
stream.Write( ";" );
stream.WriteLine();
}
stream.WriteLine();
//Write program function(s)
foreach ( var curFunction in functionList )
{
WriteFunctionTitle( stream, curFunction );
//Clear output mapping this map is used when we use
//glsl built in types like gl_Color for example
this.inputToGLStatesMap.Clear();
//Write inout params and fill inputToGLStatesMap
WriteInputParameters( stream, curFunction, gpuType );
WriteOutParameters( stream, curFunction, gpuType );
stream.Write( "void main() {" );
stream.WriteLine();
//Write local parameters
var localParams = curFunction.LocalParameters;
foreach ( var itParam in localParams )
{
stream.Write( "\t" );
WriteLocalParameter( stream, itParam );
stream.Write( ";" );
stream.WriteLine();
}
stream.WriteLine();
//Sort function atoms
curFunction.SortAtomInstances();
var atomInstances = curFunction.AtomInstances;
foreach ( var itAtom in atomInstances )
{
var funcInvoc = itAtom as FunctionInvocation;
var localOs = new StringBuilder();
//Write function name
localOs.Append( "\t" + funcInvoc.FunctionAtomType + "(" );
int curIndLevel = 0;
int itOperand = 0;
int itOperandEnd = funcInvoc.OperandList.Count;
while ( itOperand != itOperandEnd )
{
Operand op = funcInvoc.OperandList[ itOperand ];
Operand.OpSemantic opSemantic = op.Semantic;
string paramName = op.Parameter.Name;
Parameter.ContentType content = op.Parameter.Content;
if ( opSemantic == Operand.OpSemantic.Out || opSemantic == Operand.OpSemantic.InOut )
{
bool isVarying = false;
// Check if we write to an varying because the are only readable in fragment programs
if ( gpuType == GpuProgramType.Fragment )
{
if ( this.fragInputParams.Contains( paramName ) )
{
//Declare the copy variable
string newVar = "local_" + paramName;
string tempVar = paramName;
isVarying = true;
// We stored the original values in the mFragInputParams thats why we have to replace the first var with o
// because all vertex output vars are prefixed with o in glsl the name has to match in the fragment program.
tempVar = tempVar.Remove( 0 );
tempVar = tempVar.Insert( 0, "o" );
//Declare the copy variable and assign the original
stream.WriteLine( "\t" + this.gpuConstTypeMap[ op.Parameter.Type ] + " " + newVar + " = " +
tempVar );
//From now on we replace it automatic
this.inputToGLStatesMap[ paramName ] = newVar;
//Remove the param because now it is replaced automatic with the local variable
//(which could be written).
this.fragInputParams.Remove( paramName );
}
}
//If its not varying param check if a uniform is written
if ( !isVarying )
{
foreach ( var param in parameterList )
{
if ( GLSLProgramWriter.CompareUniformByName( param, paramName ) )
{
//Declare the copy variable
string newVar = "local_" + paramName;
//now we check if we already declared a uniform redirector var
if ( this.inputToGLStatesMap.ContainsKey( newVar ) == false )
{
//Declare the copy variable and assign the original
stream.WriteLine( "\t" + this.gpuConstTypeMap[ param.Type ] + " " + newVar +
paramName + ";\n" );
//From now on we replace it automatic
this.inputToGLStatesMap.Add( paramName, newVar );
}
}
}
}
}
if ( this.inputToGLStatesMap.ContainsKey( paramName ) )
{
int mask = op.Mask; // our swizzle mask
//Here we insert the renamed param name
localOs.Append( "." + Operand.GetMaskAsString( mask ) );
if ( mask != (int)Operand.OpMask.All )
{
localOs.Append( "." + Operand.GetMaskAsString( mask ) );
}
//Now that every texcoord is a vec4 (passed as vertex attributes)
//we have to swizzle them aoccording the desired type.
else if ( gpuType == GpuProgramType.Vertex &&
content == Parameter.ContentType.TextureCoordinate0 ||
content == Parameter.ContentType.TextureCoordinate1 ||
content == Parameter.ContentType.TextureCoordinate2 ||
content == Parameter.ContentType.TextureCoordinate3 ||
content == Parameter.ContentType.TextureCoordinate4 ||
content == Parameter.ContentType.TextureCoordinate5 ||
content == Parameter.ContentType.TextureCoordinate6 ||
content == Parameter.ContentType.TextureCoordinate7 )
{
//Now generate the swizzel mask according
//the type.
switch ( op.Parameter.Type )
{
case GpuProgramParameters.GpuConstantType.Float1:
localOs.Append( ".x" );
break;
case GpuProgramParameters.GpuConstantType.Float2:
localOs.Append( ".xy" );
break;
case GpuProgramParameters.GpuConstantType.Float3:
localOs.Append( ".xyz" );
break;
case GpuProgramParameters.GpuConstantType.Float4:
localOs.Append( ".xyzw" );
break;
default:
break;
}
}
}
else
{
localOs.Append( op.ToString() );
}
itOperand++;
//Prepare for the next operand
int opIndLevel = 0;
if ( itOperand != itOperandEnd )
{
opIndLevel = funcInvoc.OperandList[ itOperand ].IndirectionLevel;
}
if ( curIndLevel < opIndLevel )
{
while ( curIndLevel < opIndLevel )
{
curIndLevel++;
localOs.Append( "[" );
}
}
else
{
while ( curIndLevel > opIndLevel )
{
curIndLevel--;
localOs.Append( "]" );
}
if ( opIndLevel != 0 )
{
localOs.Append( "][" );
}
else if ( itOperand != itOperandEnd )
{
localOs.Append( ", " );
}
}
if ( curIndLevel != 0 )
{
localOs.Append( "int(" );
}
}
//Write function call closer
localOs.AppendLine( ");" );
localOs.AppendLine();
stream.Write( localOs.ToString() );
}
stream.WriteLine( "}" );
}
stream.WriteLine();
}