BufferedImage生成黑色背景

Question

好吧,所以我正在制作游戏,我正在尝试通过在其上添加文本来修改原始命中标记图像,并且我使用以下代码:

import javax.swing.ImageIcon;
import javax.swing.Timer;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
public class HitMarker {

    public static final Image rangeHitMarker = new ImageIcon(HitMarker.class.getResource("rangeHitMarker.png")).getImage();
    public static final Image magicHitMarker = new ImageIcon(HitMarker.class.getResource("magicHitMarker.png")).getImage();
    public static final Image monsterHitMarker = new ImageIcon(HitMarker.class.getResource("monsterHitMarker.png")).getImage();

    public static final Font font = new Font("Tahoma", Font.PLAIN, 10);

    public static final Color t = new Color(0,0,0,0);

    public Image hitMarker;
    public BufferedImage image;
    public String hit;

    public int attackStyle;

    public boolean rangeAttack;
    public int x;
    public int y;

    public Timer timer;
    public boolean remove;

    public HitMarker(int x, int y, int hit, int attackStyle){
        this.hit = String.format("%d", hit);
        this.remove = false;
        this.x = x;
        this.y = y;
        this.attackStyle = attackStyle;
        this.hitMarker = getImage();
        BufferedImage bi = new BufferedImage(35, 20, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = bi.createGraphics();
        g.drawImage(hitMarker, 0, 0, null);
        g.setFont(font);
        g.setColor(Color.WHITE);
        g.drawString(this.hit, 18, 13);
        g.dispose();
        image = bi;
        timer = new Timer(800,
                new ActionListener(){
            public void actionPerformed(ActionEvent e){
                remove = true;
                timer.stop();
            }
        }
        );
        timer.setInitialDelay(800);
        timer.start();
    }

    public HitMarker(int x, int y, int hit){
        this.hit = String.format("%d", hit);
        this.remove = false;
        this.x = x;
        this.y = y;
        this.hitMarker = monsterHitMarker;
        BufferedImage bi = new BufferedImage(35, 20, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = bi.createGraphics();
        g.drawImage(hitMarker, 0, 0, null);
        g.setFont(font);
        g.setColor(Color.WHITE);
        g.drawString(this.hit, 18, 13);
        g.dispose();
        image = bi;
        timer = new Timer(800,
                new ActionListener(){
            public void actionPerformed(ActionEvent e){
                remove = true;
                timer.stop();
            }
        }
        );
        timer.setInitialDelay(800);
        timer.start();
    }

    public boolean isRangeAttack(){
        return attackStyle == AttackStyleConstants.RANGE || attackStyle == AttackStyleConstants.RANGE_DEFENCE ? true : false;
    }

    public Image getImage(){
        return isRangeAttack() ? rangeHitMarker : magicHitMarker;
    }

}

特别关注构造函数:我遇到的错误是当我创建BufferedImage并在缓冲图像上绘制图像时,它会自动创建黑色背景,我不知道为什么.我已经尝试过研究这个主题,并且有些人说要改变一些关于AlphaComposite和g.clearRect()方法的东西,但这些似乎都不起作用.顺便说一下,我在缓冲图像上绘制的图像是35x20(这是缓冲图像的尺寸),它具有透明背景.如果有人能告诉我如何删除这个黑色背景,将非常感谢,谢谢.

Answer 1

试试BufferedImage.TYPE_INT_ARGB.这将使区域透明而不是黑色.