private UniformCollection FindUniforms(ShaderProgramNameGL3x program)
{
int programHandle = program.Value;
int numberOfUniforms;
GL.GetProgram(programHandle, ProgramParameter.ActiveUniforms, out numberOfUniforms);
int uniformNameMaxLength;
GL.GetProgram(programHandle, ProgramParameter.ActiveUniformMaxLength, out uniformNameMaxLength);
UniformCollection uniforms = new UniformCollection();
for (int i = 0; i < numberOfUniforms; ++i)
{
int uniformNameLength;
int uniformSize;
ActiveUniformType uniformType;
StringBuilder uniformNameBuilder = new StringBuilder(uniformNameMaxLength);
GL.GetActiveUniform(programHandle, i, uniformNameMaxLength,
out uniformNameLength, out uniformSize, out uniformType, uniformNameBuilder);
string uniformName = CorrectUniformName(uniformNameBuilder.ToString());
if (uniformName.StartsWith("gl_", StringComparison.InvariantCulture))
{
//
// Names starting with the reserved prefix of "gl_" have a location of -1.
//
continue;
}
//
// Skip uniforms in a named block
//
int uniformBlockIndex;
GL.GetActiveUniforms(programHandle, 1, ref i, ActiveUniformParameter.UniformBlockIndex, out uniformBlockIndex);
if (uniformBlockIndex != -1)
{
continue;
}
if (uniformSize != 1)
{
// TODO: Support arrays
throw new NotSupportedException("Uniform arrays are not supported.");
}
int uniformLocation = GL.GetUniformLocation(programHandle, uniformName);
uniforms.Add(CreateUniform(uniformName, uniformLocation, uniformType));
}
return(uniforms);
}
private static ShaderVertexAttributeCollection FindVertexAttributes(ShaderProgramNameGL3x program)
{
int programHandle = program.Value;
int numberOfAttributes;
GL.GetProgram(programHandle, ProgramParameter.ActiveAttributes, out numberOfAttributes);
int attributeNameMaxLength;
GL.GetProgram(programHandle, ProgramParameter.ActiveAttributeMaxLength, out attributeNameMaxLength);
ShaderVertexAttributeCollection vertexAttributes = new ShaderVertexAttributeCollection();
for (int i = 0; i < numberOfAttributes; ++i)
{
int attributeNameLength;
int attributeLength;
ActiveAttribType attributeType;
StringBuilder attributeNameBuilder = new StringBuilder(attributeNameMaxLength);
GL.GetActiveAttrib(programHandle, i, attributeNameMaxLength,
out attributeNameLength, out attributeLength, out attributeType, attributeNameBuilder);
string attributeName = attributeNameBuilder.ToString();
if (attributeName.StartsWith("gl_", StringComparison.InvariantCulture))
{
//
// Names starting with the reserved prefix of "gl_" have a location of -1.
//
continue;
}
int attributeLocation = GL.GetAttribLocation(programHandle, attributeName);
vertexAttributes.Add(new ShaderVertexAttribute(
attributeName, attributeLocation, TypeConverterGL3x.To(attributeType), attributeLength));
}
return(vertexAttributes);
}
public ShaderProgramGL3x(
string vertexShaderSource,
string geometryShaderSource,
string fragmentShaderSource)
{
_vertexShader = new ShaderObjectGL3x(ShaderType.VertexShader, vertexShaderSource);
if (geometryShaderSource.Length > 0)
{
_geometryShader = new ShaderObjectGL3x(ShaderType.GeometryShaderExt, geometryShaderSource);
}
_fragmentShader = new ShaderObjectGL3x(ShaderType.FragmentShader, fragmentShaderSource);
_program = new ShaderProgramNameGL3x();
int programHandle = _program.Value;
GL.AttachShader(programHandle, _vertexShader.Handle);
if (geometryShaderSource.Length > 0)
{
GL.AttachShader(programHandle, _geometryShader.Handle);
}
GL.AttachShader(programHandle, _fragmentShader.Handle);
GL.LinkProgram(programHandle);
int linkStatus;
GL.GetProgram(programHandle, ProgramParameter.LinkStatus, out linkStatus);
if (linkStatus == 0)
{
throw new CouldNotCreateVideoCardResourceException("Could not link shader program. Link Log: \n\n" + ProgramInfoLog);
}
_fragmentOutputs = new FragmentOutputsGL3x(_program);
_vertexAttributes = FindVertexAttributes(_program);
_dirtyUniforms = new List <ICleanable>();
_uniforms = FindUniforms(_program);
_uniformBlocks = FindUniformBlocks(_program);
InitializeAutomaticUniforms(_uniforms);
}
public ShaderProgramGL3x(
string vertexShaderSource,
string geometryShaderSource,
string fragmentShaderSource)
{
_vertexShader = new ShaderObjectGL3x(ShaderType.VertexShader, vertexShaderSource);
if (geometryShaderSource.Length > 0)
{
_geometryShader = new ShaderObjectGL3x(ShaderType.GeometryShaderExt, geometryShaderSource);
}
_fragmentShader = new ShaderObjectGL3x(ShaderType.FragmentShader, fragmentShaderSource);
_program = new ShaderProgramNameGL3x();
int programHandle = _program.Value;
GL.AttachShader(programHandle, _vertexShader.Handle);
if (geometryShaderSource.Length > 0)
{
GL.AttachShader(programHandle, _geometryShader.Handle);
}
GL.AttachShader(programHandle, _fragmentShader.Handle);
GL.LinkProgram(programHandle);
int linkStatus;
GL.GetProgram(programHandle, ProgramParameter.LinkStatus, out linkStatus);
if (linkStatus == 0)
{
throw new CouldNotCreateVideoCardResourceException("Could not link shader program. Link Log: \n\n" + ProgramInfoLog);
}
_fragmentOutputs = new FragmentOutputsGL3x(_program);
_vertexAttributes = FindVertexAttributes(_program);
_dirtyUniforms = new List<ICleanable>();
_uniforms = FindUniforms(_program);
_uniformBlocks = FindUniformBlocks(_program);
InitializeAutomaticUniforms(_uniforms);
}
private static ShaderVertexAttributeCollection FindVertexAttributes(ShaderProgramNameGL3x program)
{
int programHandle = program.Value;
int numberOfAttributes;
GL.GetProgram(programHandle, ProgramParameter.ActiveAttributes, out numberOfAttributes);
int attributeNameMaxLength;
GL.GetProgram(programHandle, ProgramParameter.ActiveAttributeMaxLength, out attributeNameMaxLength);
ShaderVertexAttributeCollection vertexAttributes = new ShaderVertexAttributeCollection();
for (int i = 0; i < numberOfAttributes; ++i)
{
int attributeNameLength;
int attributeLength;
ActiveAttribType attributeType;
StringBuilder attributeNameBuilder = new StringBuilder(attributeNameMaxLength);
GL.GetActiveAttrib(programHandle, i, attributeNameMaxLength,
out attributeNameLength, out attributeLength, out attributeType, attributeNameBuilder);
string attributeName = attributeNameBuilder.ToString();
if (attributeName.StartsWith("gl_", StringComparison.InvariantCulture))
{
//
// Names starting with the reserved prefix of "gl_" have a location of -1.
//
continue;
}
int attributeLocation = GL.GetAttribLocation(programHandle, attributeName);
vertexAttributes.Add(new ShaderVertexAttribute(
attributeName, attributeLocation, TypeConverterGL3x.To(attributeType), attributeLength));
}
return vertexAttributes;
}
public FragmentOutputsGL3x(ShaderProgramNameGL3x program)
{
_program = program;
}
private static UniformBlockCollection FindUniformBlocks(ShaderProgramNameGL3x program)
{
int programHandle = program.Value;
int numberOfUniformBlocks;
GL.GetProgram(programHandle, ProgramParameter.ActiveUniformBlocks, out numberOfUniformBlocks);
UniformBlockCollection uniformBlocks = new UniformBlockCollection();
for (int i = 0; i < numberOfUniformBlocks; ++i)
{
string uniformBlockName = GL.GetActiveUniformBlockName(programHandle, i);
int uniformBlockSizeInBytes;
GL.GetActiveUniformBlock(programHandle, i, ActiveUniformBlockParameter.UniformBlockDataSize, out uniformBlockSizeInBytes);
int numberOfUniformsInBlock;
GL.GetActiveUniformBlock(programHandle, i, ActiveUniformBlockParameter.UniformBlockActiveUniforms, out numberOfUniformsInBlock);
int[] uniformIndicesInBlock = new int[numberOfUniformsInBlock];
GL.GetActiveUniformBlock(programHandle, i, ActiveUniformBlockParameter.UniformBlockActiveUniformIndices, uniformIndicesInBlock);
//
// Query uniforms in this named uniform block
//
int[] uniformTypes = new int[numberOfUniformsInBlock];
int[] uniformOffsetsInBytes = new int[numberOfUniformsInBlock];
int[] uniformLengths = new int[numberOfUniformsInBlock];
int[] uniformArrayStridesInBytes = new int[numberOfUniformsInBlock];
int[] uniformmatrixStrideInBytess = new int[numberOfUniformsInBlock];
int[] uniformRowMajors = new int[numberOfUniformsInBlock];
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformType, uniformTypes);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformOffset, uniformOffsetsInBytes);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformSize, uniformLengths);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformArrayStride, uniformArrayStridesInBytes);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformMatrixStride, uniformmatrixStrideInBytess);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformIsRowMajor, uniformRowMajors);
UniformBlock uniformBlock = new UniformBlockGL3x(uniformBlockName, uniformBlockSizeInBytes, i);
for (int j = 0; j < numberOfUniformsInBlock; ++j)
{
string uniformName = GL.GetActiveUniformName(programHandle, uniformIndicesInBlock[j]);
uniformName = CorrectUniformName(uniformName);
UniformType uniformType = TypeConverterGL3x.To((ActiveUniformType)uniformTypes[j]);
uniformBlock.Members.Add(CreateUniformBlockMember(uniformName,
uniformType, uniformOffsetsInBytes[j], uniformLengths[j], uniformArrayStridesInBytes[j],
uniformmatrixStrideInBytess[j], uniformRowMajors[j]));
}
uniformBlocks.Add(uniformBlock);
//
// Create a one to one mapping between uniform blocks and uniform buffer objects.
//
GL.UniformBlockBinding(programHandle, i, i);
}
return uniformBlocks;
}
private UniformCollection FindUniforms(ShaderProgramNameGL3x program)
{
int programHandle = program.Value;
int numberOfUniforms;
GL.GetProgram(programHandle, ProgramParameter.ActiveUniforms, out numberOfUniforms);
int uniformNameMaxLength;
GL.GetProgram(programHandle, ProgramParameter.ActiveUniformMaxLength, out uniformNameMaxLength);
UniformCollection uniforms = new UniformCollection();
for (int i = 0; i < numberOfUniforms; ++i)
{
int uniformNameLength;
int uniformSize;
ActiveUniformType uniformType;
StringBuilder uniformNameBuilder = new StringBuilder(uniformNameMaxLength);
GL.GetActiveUniform(programHandle, i, uniformNameMaxLength,
out uniformNameLength, out uniformSize, out uniformType, uniformNameBuilder);
string uniformName = CorrectUniformName(uniformNameBuilder.ToString());
if (uniformName.StartsWith("gl_", StringComparison.InvariantCulture))
{
//
// Names starting with the reserved prefix of "gl_" have a location of -1.
//
continue;
}
//
// Skip uniforms in a named block
//
int uniformBlockIndex;
GL.GetActiveUniforms(programHandle, 1, ref i, ActiveUniformParameter.UniformBlockIndex, out uniformBlockIndex);
if (uniformBlockIndex != -1)
{
continue;
}
if (uniformSize != 1)
{
// TODO: Support arrays
throw new NotSupportedException("Uniform arrays are not supported.");
}
int uniformLocation = GL.GetUniformLocation(programHandle, uniformName);
uniforms.Add(CreateUniform(uniformName, uniformLocation, uniformType));
}
return uniforms;
}
private static UniformBlockCollection FindUniformBlocks(ShaderProgramNameGL3x program)
{
int programHandle = program.Value;
int numberOfUniformBlocks;
GL.GetProgram(programHandle, ProgramParameter.ActiveUniformBlocks, out numberOfUniformBlocks);
UniformBlockCollection uniformBlocks = new UniformBlockCollection();
for (int i = 0; i < numberOfUniformBlocks; ++i)
{
string uniformBlockName = GL.GetActiveUniformBlockName(programHandle, i);
int uniformBlockSizeInBytes;
GL.GetActiveUniformBlock(programHandle, i, ActiveUniformBlockParameter.UniformBlockDataSize, out uniformBlockSizeInBytes);
int numberOfUniformsInBlock;
GL.GetActiveUniformBlock(programHandle, i, ActiveUniformBlockParameter.UniformBlockActiveUniforms, out numberOfUniformsInBlock);
int[] uniformIndicesInBlock = new int[numberOfUniformsInBlock];
GL.GetActiveUniformBlock(programHandle, i, ActiveUniformBlockParameter.UniformBlockActiveUniformIndices, uniformIndicesInBlock);
//
// Query uniforms in this named uniform block
//
int[] uniformTypes = new int[numberOfUniformsInBlock];
int[] uniformOffsetsInBytes = new int[numberOfUniformsInBlock];
int[] uniformLengths = new int[numberOfUniformsInBlock];
int[] uniformArrayStridesInBytes = new int[numberOfUniformsInBlock];
int[] uniformmatrixStrideInBytess = new int[numberOfUniformsInBlock];
int[] uniformRowMajors = new int[numberOfUniformsInBlock];
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformType, uniformTypes);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformOffset, uniformOffsetsInBytes);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformSize, uniformLengths);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformArrayStride, uniformArrayStridesInBytes);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformMatrixStride, uniformmatrixStrideInBytess);
GL.GetActiveUniforms(programHandle, numberOfUniformsInBlock, uniformIndicesInBlock, ActiveUniformParameter.UniformIsRowMajor, uniformRowMajors);
UniformBlock uniformBlock = new UniformBlockGL3x(uniformBlockName, uniformBlockSizeInBytes, i);
for (int j = 0; j < numberOfUniformsInBlock; ++j)
{
string uniformName = GL.GetActiveUniformName(programHandle, uniformIndicesInBlock[j]);
uniformName = CorrectUniformName(uniformName);
UniformType uniformType = TypeConverterGL3x.To((ActiveUniformType)uniformTypes[j]);
uniformBlock.Members.Add(CreateUniformBlockMember(uniformName,
uniformType, uniformOffsetsInBytes[j], uniformLengths[j], uniformArrayStridesInBytes[j],
uniformmatrixStrideInBytess[j], uniformRowMajors[j]));
}
uniformBlocks.Add(uniformBlock);
//
// Create a one to one mapping between uniform blocks and uniform buffer objects.
//
GL.UniformBlockBinding(programHandle, i, i);
}
return(uniformBlocks);
}
public FragmentOutputsGL3x(ShaderProgramNameGL3x program)
{
_program = program;
}