getMode method
Get display mode.
Implementation
DisplayMode getMode(final int modeIndex) {
sdl.checkReturnValue(
sdl.sdl.SDL_GetDisplayMode(index, modeIndex, sdl.displayModePointer),
);
final m = sdl.displayModePointer.ref;
return DisplayMode(m.format, m.w, m.h, m.refresh_rate);
}