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;