public Shader(string name)
{
var vertexShader = CompileShaderObject(ShaderType.VertexShader, name);
var fragmentShader = CompileShaderObject(ShaderType.FragmentShader, name);
// Assemble program
program = GL.CreateProgram();
ErrorHandler.CheckGlError();
GL.AttachShader(program, vertexShader);
ErrorHandler.CheckGlError();
GL.AttachShader(program, fragmentShader);
ErrorHandler.CheckGlError();
GL.LinkProgram(program);
ErrorHandler.CheckGlError();
int success;
GL.GetProgram(program, ProgramParameter.LinkStatus, out success);
ErrorHandler.CheckGlError();
if (success == (int)All.False)
{
int len;
GL.GetProgram(program, ProgramParameter.InfoLogLength, out len);
var log = new StringBuilder(len);
unsafe
{
GL.GetProgramInfoLog(program, len, null, log);
}
Log.Write("graphics", "GL Info Log:\n{0}", log.ToString());
throw new InvalidProgramException("Link error in shader program '{0}'".F(name));
}
GL.UseProgram(program);
ErrorHandler.CheckGlError();
int numUniforms;
GL.GetProgram(program, ProgramParameter.ActiveUniforms, out numUniforms);
ErrorHandler.CheckGlError();
var nextTexUnit = 0;
for (var i = 0; i < numUniforms; i++)
{
int length, size;
ActiveUniformType type;
var sb = new StringBuilder(128);
GL.GetActiveUniform(program, i, 128, out length, out size, out type, sb);
var sampler = sb.ToString();
ErrorHandler.CheckGlError();
if (type == ActiveUniformType.Sampler2D)
{
samplers.Add(sampler, nextTexUnit);
var loc = GL.GetUniformLocation(program, sampler);
ErrorHandler.CheckGlError();
GL.Uniform1(loc, nextTexUnit);
ErrorHandler.CheckGlError();
nextTexUnit++;
}
}
}