Function gl::GetCompressedTextureSubImage

pub unsafe fn GetCompressedTextureSubImage(texture: GLuint,
                                           level: GLint,
                                           xoffset: GLint,
                                           yoffset: GLint,
                                           zoffset: GLint,
                                           width: GLsizei,
                                           height: GLsizei,
                                           depth: GLsizei,
                                           bufSize: GLsizei,
                                           pixels: *mut c_void)