/// <summary>
/// Actually create this ShaderObject resource.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating resources.
/// </param>
protected override void CreateObject(GraphicsContext ctx)
{
if (ctx == null)
{
throw new ArgumentNullException("ctx");
}
if (_CompilationParams == null)
{
throw new InvalidOperationException("no compiler parameters");
}
// Using a deep copy of the shader compiler context, since it will be modified by this ShaderProgram
// instance and the attached ShaderObject instances
ShaderCompilerContext cctx = new ShaderCompilerContext(_CompilationParams);
sLog.Debug("Compilation of shader object '{0}'.", _SourcePath);
List <string> source = GenerateSource(ctx, cctx); // Source generation!
// Set shader source
Gl.ShaderSource(ObjectName, source.ToArray());
if (ctx.Caps.GlExtensions.ShadingLanguageInclude_ARB)
{
string[] includePaths = new string[cctx.Includes.Count];
cctx.Includes.CopyTo(includePaths, 0);
// Compile shader object (specifying include paths)
Gl.CompileShaderIncludeARB(ObjectName, includePaths, null);
}
else
{
// Compile shader object (includes are already preprocessed)
Gl.CompileShader(ObjectName);
}
// Check for compilation errors
int cStatus;
Gl.GetObjectParameterARB(ObjectName, Gl.COMPILE_STATUS, out cStatus);
if (cStatus != Gl.TRUE)
{
StringBuilder sb = GetInfoLog();
// Stop compilation process
sLog.Error("Shader object \"{0}\" compilation failed:\n{1}", _SourcePath ?? "<Hardcoded>", sb.ToString());
// Log the source code referred to the shader log
sLog.Error("Source code for shader '{0}' that has generated the compiler error.", _SourcePath);
sLog.Error("--------------------------------------------------------------------------------");
uint sourcelineNo = 0;
foreach (string sourceline in source)
{
sLog.Error("{0,4} | {1}", ++sourcelineNo, sourceline.Length > 0 ? sourceline.Remove(sourceline.Length - 1, 1) : String.Empty);
}
sLog.Error("--------------------------------------------------------------------------------");
throw new ShaderException("shader object is not valid. Compiler output for {0}: {1}\n", _SourcePath, sb.ToString());
}
else
{
StringBuilder sb = GetInfoLog();
if (sb.Length > 0)
{
sLog.Warn("Shader object \"{0}\" compilation warning: {1}", _SourcePath ?? "<Hardcoded>", sb.ToString());
}
}
_Compiled = true;
}