com.github.brunothg.game.engine.image.sprite.WeakSprite Maven / Gradle / Ivy
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package com.github.brunothg.game.engine.image.sprite;
import com.github.brunothg.game.engine.image.ImageUtils;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.lang.ref.WeakReference;
/**
* This implementation of {@link Sprite} caches tiles with {@link WeakReference} in order to find a
* balance between time and memory
*
* @author Marvin Bruns
*
*/
public class WeakSprite extends DefaultSprite
{
WeakReference[][] tiles;
/**
* Create a new sprite. The given {@link BufferedImage} will be used as is. So consider passing
* a copy of your original image. Calls to {@link #getTile(int, int)} will be buffered. So
* changes maybe ignored or delayed. Calls to {@link #drawTile(Graphics2D, int, int, int, int)}
* won't be buffered.
*
* @param image The image that contains the sub-images
* @param width Width of one sub-image
* @param height Height of one sub-image
*/
public WeakSprite(BufferedImage image, int width, int height)
{
super(image, width, height);
tiles = new WeakReference[getColumns()][getRows()];
}
@Override
public BufferedImage getTile(int x, int y)
{
WeakReference weakTile = tiles[x][y];
Object tile = null;
if (weakTile != null && (tile = weakTile.get()) != null)
{
return ImageUtils.copy((BufferedImage) tile);
}
BufferedImage btile = super.getTile(x, y);
tiles[x][y] = new WeakReference(btile);
return ImageUtils.copy(btile);
}
@Override
public Sprite getSubSprite(int x, int y, int width, int height)
{
return new DerivedSprite(this, x, y, width, height);
}
}