如何克隆图片？ [英] How to clone Image?

问题描述

我有一张图片。我需要准确复制它并将其保存到BufferedImage，但是没有Image.clone（）。事情应该在计算循环内部，所以它应该非常快，没有逐像素复制。执行此操作的性能方法最好的是什么？

I have an Image. I need to make a exactly copy of it and save it to BufferedImage, but there is no Image.clone(). The thing should be inside a calculating loop and so it should be really fast, no pixel-by-pixel copying. What's the best in perfomance method to do this?

推荐答案

你可以绘制到一个缓冲的图像，所以制作一个空白 bufferedImage ，创建一个图形上下文从它开始，并将原始图像绘制到它。

You can draw to a buffered image, so make a blank bufferedImage, create a graphics context from it, and draw your original image to it.

BufferedImage copyOfImage = 
   new BufferedImage(widthOfImage, heightOfImage, BufferedImage.TYPE_INT_RGB);
Graphics g = copyOfImage.createGraphics();
g.drawImage(originalImage, 0, 0, null);

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