MultiResolutionImageTest.java 文件源码

static void testToolkitMultiResolutionImageLoad(Image image) throws Exception {

        MediaTracker tracker = new MediaTracker(new JPanel());
        tracker.addImage(image, 0);
        tracker.waitForID(0);
        if (tracker.isErrorAny()) {
            throw new RuntimeException("Error during image loading");
        }
        tracker.removeImage(image, 0);

        testImageLoaded(image);

        int w = image.getWidth(null);
        int h = image.getHeight(null);

        Image resolutionVariant = ((MultiResolutionImage) image)
                .getResolutionVariant(2 * w, 2 * h);

        if (image == resolutionVariant) {
            throw new RuntimeException("Resolution variant is not loaded");
        }

        testImageLoaded(resolutionVariant);
    }