Type Definition glu_sys::glu::PFNGLGETCOMPRESSEDTEXTURESUBIMAGEPROC

type PFNGLGETCOMPRESSEDTEXTURESUBIMAGEPROC = Option<unsafe extern "C" fn(texture: GLuint, level: GLint, xoffset: GLint, yoffset: GLint, zoffset: GLint, width: GLsizei, height: GLsizei, depth: GLsizei, bufSize: GLsizei, pixels: *mut c_void)>;