/// <summary>
/// Creates the shader program.
/// </summary>
/// <param name="vertexShaderSource">The vertex shader source.</param>
/// <param name="fragmentShaderSource">The fragment shader source.</param>
/// <param name="attributeLocations">The attribute locations. This is an optional array of
/// uint attribute locations to their names.</param>
/// <exception cref="ShaderCompilationException"></exception>
public void Create(string vertexShaderSource, string fragmentShaderSource,
Dictionary <uint, string> attributeLocations)
{
// Create the shaders.
vertexShader.Create(GL.GL_VERTEX_SHADER, vertexShaderSource);
fragmentShader.Create(GL.GL_FRAGMENT_SHADER, fragmentShaderSource);
// Create the program, attach the shaders.
ShaderProgramObject = GL.CreateProgram();
GL.AttachShader(ShaderProgramObject, vertexShader.ShaderObject);
GL.AttachShader(ShaderProgramObject, fragmentShader.ShaderObject);
// Before we link, bind any vertex attribute locations.
if (attributeLocations != null)
{
foreach (var vertexAttributeLocation in attributeLocations)
{
GL.BindAttribLocation(ShaderProgramObject, vertexAttributeLocation.Key, vertexAttributeLocation.Value);
}
}
// Now we can link the program.
GL.LinkProgram(ShaderProgramObject);
// Now that we've compiled and linked the shader, check it's link status. If it's not linked properly, we're
// going to throw an exception.
if (GetLinkStatus() == false)
{
string log = this.GetInfoLog();
throw new ShaderCompilationException(
string.Format("Failed to link shader program with ID {0}. Log: {1}", ShaderProgramObject, log),
log);
}
if (vertexShader.GetCompileStatus() == false)
{
string log = vertexShader.GetInfoLog();
throw new Exception(log);
}
if (fragmentShader.GetCompileStatus() == false)
{
string log = fragmentShader.GetInfoLog();
throw new Exception(log);
}
GL.DetachShader(ShaderProgramObject, vertexShader.ShaderObject);
GL.DetachShader(ShaderProgramObject, fragmentShader.ShaderObject);
vertexShader.Delete();
fragmentShader.Delete();
}
