GL_ARB_fragment_shader http://www.opengl.org/registry/specs/ARB/fragment_shader.txt GL_ARB_fragment_shader GL_FRAGMENT_SHADER_ARB 0x8B30 GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB 0x8B49 GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB 0x8B8B