Java SWT Image 图像 ——COPY、DISABLE、GRAY

SWT的预定了一些图像的效果：

The flag argument is a static constant of either SWT.IMAGE_COPY, SWT.IMAGE_DISABLE or SWT.IMAGE_GRAY. Copy creates a new image based on the original but with a copy of its imageData, whereas Disable and Gray create a new image applying platform specific effects.

Image ideaImage = new Image(display,
        getClass().getResourceAsStream("/icons/Idea.jpg");
	Image disabledImage  = new Image(display,image,SWT.IMAGE_DISABLE);
 	Image grayImage = new Image(display,image,SWT.IMAGE_GRAY);
 	Image copyImage = new Image(display,ideaImage,SWT.IMAGE_COPY);
	GC gc = new GC(copyImage);
    	gc.drawText("This is a copy",0,0);
    	gc.dispose();