public bool TryBuild(out GLShaderProgram program)
{
if (mHasBuilt)
{
Trace.TraceError("Attempted to build shader program twice");
program = null;
return(false);
}
// link program
GL.LinkProgram(mShaderProgramId);
// check for linking errors
GL.GetProgram(mShaderProgramId, GetProgramParameterName.LinkStatus, out int linkStatus);
if (linkStatus == 0)
{
Trace.TraceError("Shader program linking failed");
// print info log
GL.GetProgram(mShaderProgramId, GetProgramParameterName.InfoLogLength, out int infoLogLength);
if (infoLogLength > 0)
{
GL.GetProgramInfoLog(mShaderProgramId, infoLogLength + 1, out int length, out var log);
Trace.TraceError(log);
Trace.TraceError("");
}
program = null;
return(false);
}
else
{
// print info log
GL.GetProgram(mShaderProgramId, GetProgramParameterName.InfoLogLength, out int infoLogLength);
if (infoLogLength > 0)
{
GL.GetProgramInfoLog(mShaderProgramId, infoLogLength + 1, out int length, out var log);
Trace.TraceInformation($"Shader program info log:");
Trace.TraceInformation(log);
Trace.TraceInformation("");
}
}
DeleteAttachedShaders();
program = new GLShaderProgram(mShaderProgramId);
mHasBuilt = true;
return(true);
}
public static bool TryCreate(string vertexShaderFilepath, string fragmentShaderFilepath, out GLShaderProgram program)
{
var vertexShaderSource = File.ReadAllText(vertexShaderFilepath);
var fragmentShaderSource = File.ReadAllText(fragmentShaderFilepath);
using (var builder = new GLShaderProgramBuilder())
{
if (!builder.TryAttachShader(ShaderType.VertexShader, vertexShaderSource))
{
program = null;
return(false);
}
if (!builder.TryAttachShader(ShaderType.FragmentShader, fragmentShaderSource))
{
program = null;
return(false);
}
if (!builder.TryBuild(out program))
{
return(false);
}
return(true);
}
}
