在applet程序中将Image转换为Buffered Image

时间:2013-07-11 20:34:55

标签: java image swing applet imageicon

我尝试了很多方法在Applet程序中将Image类的图像转换为BufferedImage。我有一个方法,从netbeans运行时工作正常。但相同的代码在浏览器运行时不起作用。我试过的代码是

ImageIcon icon = new ImageIcon(orgImage);
BufferedImage buffer = ((ToolkitImage) icon.getImage()).getBufferedImage();

还尝试了以下

1) BufferedImage buffer = ((ToolkitImage) orgImage).getBufferedImage();

2) BufferedImage  buffer = new BufferedImage(
   orgImage.getWidth(null), orgImage.getWidth(null), BufferedImage.TYPE_INT_RGB);
   buffer.getGraphics().drawImage(orgImage, 0, 0, null);

orgImage是彩色图像。

在所有这些情况下,

缓冲区为空..

我的问题的解决方案是什么?

1 个答案:

答案 0 :(得分:2)

要将图像转换为缓冲图像,您可以使用以下功能:

/**
 * Converts a given Image into a BufferedImage
 * 
 * @param img The Image to be converted
 * @return The converted BufferedImage
 */
public BufferedImage toBufferedImage(Image img){
    if (img instanceof BufferedImage) {
        return (BufferedImage) img;
    }
    // Create a buffered image with transparency
    BufferedImage bimage = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_ARGB);
    // Draw the image on to the buffered image
    Graphics2D bGr = bimage.createGraphics();
    bGr.drawImage(img, 0, 0, null);
    bGr.dispose();
    // Return the buffered image
    return bimage;
}

将其粘贴到您班级的任何位置,然后使用以下代码:

BufferedImage bi = toBufferedImage(orgImage);

〜问候Max