手把手一步一步教你使用Java开发一个大型街机动作闯关类游戏04图像资源的透明处理

package sprite;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;


public class Image {
	private BufferedImage _img;
	private int _width;
	private int _height;

	public Image(String path){
		try {
			_img = ImageIO.read(getClass().getClassLoader().getResourceAsStream(path));
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		_width = _img.getWidth(null);
		_height = _img.getHeight(null);
		_img = makeTransparent(_img);
	}
	
	private BufferedImage makeTransparent(BufferedImage tmpImage)
	{
		int h=tmpImage.getHeight(null);
		int w=tmpImage.getWidth(null);

		BufferedImage resultImage=new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);

		// assume the upperleft corner of the original image is a transparent pixel
		Color trans = new Color(255,0,255);
		Color transOther = new Color(252,0,255);
		int transparentColor=trans.getRGB();
		int transparentColorOther=transOther.getRGB();
		for (int y=0;y<h;y++)
		  for (int x=0;x<w;x++)
		  {
			int color=tmpImage.getRGB(x,y);
			if (color==transparentColor) color=color & 0x00FFFFFF; // clear the alpha flag
			else if(color==transparentColorOther) color=color & 0x00FFFFFF;
			resultImage.setRGB(x,y,color);
		  }

		return resultImage;
	}

	public BufferedImage getImage(){
		return _img;
	}

}

color=color & 0x00FFFFFF;