Java将图像转换为BufferedImage

  • Z时代
  • 2024-01-10
  • 分类：问答

在StackOverflow上已经存在类似此链接的问题，并且可接受的答案是“广播”：

Image image = ImageIO.read(new File(file));
BufferedImage buffered = (BufferedImage) image;

在我的程序中，我尝试：

final float FACTOR  = 4f;
BufferedImage img = ImageIO.read(new File("graphic.png"));
int scaleX = (int) (img.getWidth() * FACTOR);
int scaleY = (int) (img.getHeight() * FACTOR);
Image image = img.getScaledInstance(scaleX, scaleY, Image.SCALE_SMOOTH);
BufferedImage buffered = (BufferedImage) image;

不幸的是，我得到运行时错误：

sun.awt.image.ToolkitImage无法转换为java.awt.image.BufferedImage

显然，投射不起作用。

问题是：将Image转换为BufferedImage的正确方法是（或存在）什么？

回答：

从Java游戏引擎：

/**
 * Converts a given Image into a BufferedImage
 *
 * @param img The Image to be converted
 * @return The converted BufferedImage
 */
public static 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;
}

以上是 Java将图像转换为BufferedImage 的全部内容， 来源链接： utcz.com/qa/433651.html

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