public GLShaderProgram(GlInterface gl, string vertex_shader_source, string fragment_shader_source)
{
this.gl = gl;
this.GlVersion = gl.ContextInfo.Version;
vertex_shader_source = GetShader(false, vertex_shader_source);
fragment_shader_source = GetShader(true, fragment_shader_source);
vertex_shader = new GLShader(gl, GL_VERTEX_SHADER, vertex_shader_source);
fragment_shader = new GLShader(gl, GL_FRAGMENT_SHADER, fragment_shader_source);
ProgramId = gl.CreateProgram();
gl.AttachShader(ProgramId, vertex_shader.ShaderId);
gl.AttachShader(ProgramId, fragment_shader.ShaderId);
gl.LinkProgram(ProgramId);
int link_succeeded;
gl.GetProgramiv(ProgramId, GL_LINK_STATUS, &link_succeeded);
if (link_succeeded == 0)
{
byte[] buf = new byte[MaxErrorLength];
string log;
fixed(byte *pbuf = buf)
{
gl.GetProgramInfoLog(ProgramId, MaxErrorLength, out int log_length, pbuf);
log = Encoding.UTF8.GetString(pbuf, log_length);
}
throw new InvalidOperationException($"Failed to link program : {log}");
}
}