Implement fragment program fallback for GL_ATI_texture_env_combine3 and GL_NV_texture_env_combine4 #682
Description
On Intel HD graphics the GL_ATI_texture_env_combine3 and GL_NV_texture_env_combine4 extensions are not supported, this causes reflection on armor to become disabled. As GL_ARB_fragment_program is available on this graphics target, it should be possible to support the MAD operator in the texture stages by generating a fragment program.
The behaviour of GL_ATI_texture_env_combine3 is the desired ideal behaviour.