无缓冲图像的字母混合
我想在 Graphics2D 上绘制一个形状，如果它与某个范围相交，则将其一部分着色为不同的颜色。我通过使用 AlphaComposite 和 AlphaComposite.SRC_IN 将 2 个形状绘制到 BufferedImage（原始形状和将导致颜色变化的区域）中来实现此目的。问题是，如果滚动画布，屏幕就会变得滞后，因为每次调用 Paint 方法时都会创建一个缓冲图像。
有没有办法在不使用缓冲图像对象的情况下实现相同的效果（两个形状重叠，只有第二个形状的重叠区域是彩色的）？
干杯， 最大限度
I'd like to draw a shape on a Graphics2D and colour a part of it different if it intersects a certain range. I managed to do this by drawing 2 shapes into a BufferedImage (the original shape and the area that will cause a change of colour) by using AlphaComposite and AlphaComposite.SRC_IN. The problem is that if the canvas is scrolled, the screen becomes laggy as every time the paint method is called, a buffered image is created.
Is there any way of achieving the same effect (2 shapes overlapping, only 2nd shape's overlap area is coloured) without using a buffered image object?
Cheers,
Max
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我不确定我是否完全理解您想要做什么，但您不应该在每次调用绘制方法时创建缓冲图像；仅当要显示的对象发生更改时。
I'm not sure I undertand fully what you're trying to do, but you shouldn't create the buffered image each time the paint method is called; only when something is changed in the objects to display.