public OptimizationResult Optimize(ShaderType shaderType, string source, OptimizationOptions options)
{
var sourcePtr = Marshal.StringToHGlobalAnsi(source);
var shader = NativeMethods.glslopt_optimize(_ctx, shaderType, sourcePtr, (uint)options);
if (shader == IntPtr.Zero)
{
throw new Exception("Failed to create shader");
}
try
{
if (!NativeMethods.glslopt_get_status(shader))
{
var log = NativeMethods.glslopt_get_log(shader);
var info = Marshal.PtrToStringAnsi(log);
throw new Exception("Error parsing shader: " + info);
}
var outputPtr = NativeMethods.glslopt_get_output(shader);
var output = Marshal.PtrToStringAnsi(outputPtr);
var result = new OptimizationResult();
result.OutputCode = output;
var inputCount = NativeMethods.glslopt_shader_get_input_count(shader);
for (int i = 0; i < inputCount; i++)
{
IntPtr outName;
int outLocation, outArraySize, outMatSize, outVecSize;
BasicType outType;
Precision outPrec;
NativeMethods.glslopt_shader_get_input_desc(shader, i,
out outName,
out outType,
out outPrec,
out outVecSize,
out outMatSize,
out outArraySize,
out outLocation);
var name = Marshal.PtrToStringAnsi(outName);
result.Inputs.Add(new VariableInfo
{
Name = name,
Type = outType,
Precision = outPrec,
VectorSize = outVecSize,
MatrixSize = outMatSize,
ArraySize = outArraySize,
Location = outLocation
});
}
var uniformCount = NativeMethods.glslopt_shader_get_uniform_count(shader);
for (int i = 0; i < uniformCount; i++)
{
IntPtr outName;
int outLocation, outArraySize, outMatSize, outVecSize;
BasicType outType;
Precision outPrec;
NativeMethods.glslopt_shader_get_uniform_desc(shader, i,
out outName,
out outType,
out outPrec,
out outVecSize,
out outMatSize,
out outArraySize,
out outLocation);
var name = Marshal.PtrToStringAnsi(outName);
result.Uniforms.Add(new VariableInfo
{
Name = name,
Type = outType,
Precision = outPrec,
VectorSize = outVecSize,
MatrixSize = outMatSize,
ArraySize = outArraySize,
Location = outLocation
});
}
var textureCount = NativeMethods.glslopt_shader_get_texture_count(shader);
for (int i = 0; i < textureCount; i++)
{
IntPtr outName;
int outLocation, outArraySize, outMatSize, outVecSize;
BasicType outType;
Precision outPrec;
NativeMethods.glslopt_shader_get_texture_desc(shader, i,
out outName,
out outType,
out outPrec,
out outVecSize,
out outMatSize,
out outArraySize,
out outLocation);
var name = Marshal.PtrToStringAnsi(outName);
result.Textures.Add(new VariableInfo
{
Name = name,
Type = outType,
Precision = outPrec,
VectorSize = outVecSize,
MatrixSize = outMatSize,
ArraySize = outArraySize,
Location = outLocation
});
}
int outMath, outTex, outFlow;
NativeMethods.glslopt_shader_get_stats(shader, out outMath, out outTex, out outFlow);
result.Statistics.ApproxMathInstructions = outMath;
result.Statistics.ApproxTextureInstructions = outTex;
result.Statistics.ApproxControlFlowInstructions = outFlow;
return(result);
}
finally
{
NativeMethods.glslopt_shader_delete(shader);
}
}
public OptimizationResult Optimize(ShaderType shaderType, string source, OptimizationOptions options)
{
var sourcePtr = Marshal.StringToHGlobalAnsi(source);
var shader = NativeMethods.glslopt_optimize(_ctx, shaderType, sourcePtr, (uint) options);
if (shader == IntPtr.Zero)
throw new Exception("Failed to create shader");
try
{
if (!NativeMethods.glslopt_get_status(shader))
{
var log = NativeMethods.glslopt_get_log(shader);
var info = Marshal.PtrToStringAnsi(log);
throw new Exception("Error parsing shader: " + info);
}
var outputPtr = NativeMethods.glslopt_get_output(shader);
var output = Marshal.PtrToStringAnsi(outputPtr);
var result = new OptimizationResult();
result.OutputCode = output;
var inputCount = NativeMethods.glslopt_shader_get_input_count(shader);
for (int i = 0; i < inputCount; i++)
{
IntPtr outName;
int outLocation, outArraySize, outMatSize, outVecSize;
BasicType outType;
Precision outPrec;
NativeMethods.glslopt_shader_get_input_desc(shader, i,
out outName,
out outType,
out outPrec,
out outVecSize,
out outMatSize,
out outArraySize,
out outLocation);
var name = Marshal.PtrToStringAnsi(outName);
result.Inputs.Add(new VariableInfo
{
Name = name,
Type = outType,
Precision = outPrec,
VectorSize = outVecSize,
MatrixSize = outMatSize,
ArraySize = outArraySize,
Location = outLocation
});
}
var uniformCount = NativeMethods.glslopt_shader_get_uniform_count(shader);
for (int i = 0; i < uniformCount; i++)
{
IntPtr outName;
int outLocation, outArraySize, outMatSize, outVecSize;
BasicType outType;
Precision outPrec;
NativeMethods.glslopt_shader_get_uniform_desc(shader, i,
out outName,
out outType,
out outPrec,
out outVecSize,
out outMatSize,
out outArraySize,
out outLocation);
var name = Marshal.PtrToStringAnsi(outName);
result.Uniforms.Add(new VariableInfo
{
Name = name,
Type = outType,
Precision = outPrec,
VectorSize = outVecSize,
MatrixSize = outMatSize,
ArraySize = outArraySize,
Location = outLocation
});
}
var textureCount = NativeMethods.glslopt_shader_get_texture_count(shader);
for (int i = 0; i < textureCount; i++)
{
IntPtr outName;
int outLocation, outArraySize, outMatSize, outVecSize;
BasicType outType;
Precision outPrec;
NativeMethods.glslopt_shader_get_texture_desc(shader, i,
out outName,
out outType,
out outPrec,
out outVecSize,
out outMatSize,
out outArraySize,
out outLocation);
var name = Marshal.PtrToStringAnsi(outName);
result.Textures.Add(new VariableInfo
{
Name = name,
Type = outType,
Precision = outPrec,
VectorSize = outVecSize,
MatrixSize = outMatSize,
ArraySize = outArraySize,
Location = outLocation
});
}
int outMath, outTex, outFlow;
NativeMethods.glslopt_shader_get_stats(shader, out outMath, out outTex, out outFlow);
result.Statistics.ApproxMathInstructions = outMath;
result.Statistics.ApproxTextureInstructions = outTex;
result.Statistics.ApproxControlFlowInstructions = outFlow;
return result;
}
finally
{
NativeMethods.glslopt_shader_delete(shader);
}
}