NXCanvas.java

package provider.nx;

import provider.MapleCanvas;
import provider.pkgnx.format.nodes.NXBitmapNode;

import java.awt.image.BufferedImage;

/**
 * @author Aaron
 * @version 1.0
 * @since 6/8/13
 */
public class NXCanvas implements MapleCanvas {
	private final NXBitmapNode bitmapNode;
	private BufferedImage cache = null;

	public NXCanvas(NXBitmapNode bitmapNode) {
		this.bitmapNode = bitmapNode;
	}

	@Override
	public int getHeight() {
		ensureCached();
		return cache.getHeight();
	}

	@Override
	public int getWidth() {
		ensureCached();
		return cache.getWidth();
	}

	@Override
	public BufferedImage getImage() {
		ensureCached();
		return cache;
	}

	private void ensureCached() {
		if (cache == null)
			cache = bitmapNode.getImage();
	}
}