Function sdl2_sys::SDL_GetSurfaceColorMod

pub unsafe extern "C" fn SDL_GetSurfaceColorMod(
    surface: *mut SDL_Surface, 
    r: *mut Uint8, 
    g: *mut Uint8, 
    b: *mut Uint8
) -> c_int

\brief Get the additional color value used in blit operations.

\param surface The surface to query. \param r A pointer filled in with the current red color value. \param g A pointer filled in with the current green color value. \param b A pointer filled in with the current blue color value.

\return 0 on success, or -1 if the surface is not valid.

\sa SDL_SetSurfaceColorMod()