GL_ARB_fragment_shader
http://oss.sgi.com/projects/ogl-sample/registry/ARB/fragment_shader.txt
	GL_FRAGMENT_SHADER_ARB 0x8B30
	GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB 0x8B49
	GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB 0x8B8B