1GL_ARB_fragment_shader 2http://www.opengl.org/registry/specs/ARB/fragment_shader.txt 3GL_ARB_fragment_shader 4 GL_FRAGMENT_SHADER_ARB 0x8B30 5 GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB 0x8B49 6 GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB 0x8B8B 7