public void resizeIfNeeded() {
        if (screenWidth != screenTarget.width || screenHeight != screenTarget.height) {
            resize(screenTarget.width, screenTarget.height);
        }
    }
Utility to check and resize targets if screen is resized. Useful since as far as I know, there is no Forge "onScreenResized" event.
Call this from the render thread before drawing into inputs
core/src/main/java/mrtjp/projectred/core/client/FixedScalePostChain.java