java.awt.image.MultiResolutionImage#getResolutionVariants()源码实例Demo

@Test
public void baseMultiResImageTest() {
    int baseIndex = 1;
    int length = 4;
    BufferedImage[] resolutionVariants = new BufferedImage[length];
    for (int i = 0; i < length; i++) {
        resolutionVariants[i] = createImage(i);
    }
    MultiResolutionImage bmrImage = new BaseMultiResolutionImage(baseIndex, resolutionVariants);
    List<Image> rvImageList = bmrImage.getResolutionVariants();
    assertEquals("MultiResoltion Image shoudl contain the same number of resolution variants!", rvImageList.size(), length);

    for (int i = 0; i < length; i++) {
        int imageSize = getSize(i);
        Image testRVImage = bmrImage.getResolutionVariant(imageSize, imageSize);
        assertSame("Images should be the same", testRVImage, resolutionVariants[i]);
    }

}
 

public static void main(String[] args) throws Exception {

        if (OSInfo.getOSType() != OSInfo.OSType.MACOSX) {
            return;
        }

        String icon = "NSImage://NSApplicationIcon";
        final Image image = Toolkit.getDefaultToolkit().getImage(icon);

        if (!(image instanceof MultiResolutionImage)) {
            throw new RuntimeException("Icon does not have resolution variants!");
        }

        MultiResolutionImage multiResolutionImage = (MultiResolutionImage) image;

        int width = 0;
        int height = 0;

        for (Image resolutionVariant : multiResolutionImage.getResolutionVariants()) {
            int rvWidth = resolutionVariant.getWidth(null);
            int rvHeight = resolutionVariant.getHeight(null);
            if (rvWidth < width || rvHeight < height) {
                throw new RuntimeException("Resolution variants are not sorted!");
            }
            width = rvWidth;
            height = rvHeight;
        }
    }
 

public static void main(String[] args) throws Exception {

        if (OSInfo.getOSType() != OSInfo.OSType.MACOSX) {
            return;
        }

        String icon = "NSImage://NSApplicationIcon";
        final Image image = Toolkit.getDefaultToolkit().getImage(icon);

        if (!(image instanceof MultiResolutionImage)) {
            throw new RuntimeException("Icon does not have resolution variants!");
        }

        MultiResolutionImage multiResolutionImage = (MultiResolutionImage) image;

        int width = 0;
        int height = 0;

        for (Image resolutionVariant : multiResolutionImage.getResolutionVariants()) {
            int rvWidth = resolutionVariant.getWidth(null);
            int rvHeight = resolutionVariant.getHeight(null);
            if (rvWidth < width || rvHeight < height) {
                throw new RuntimeException("Resolution variants are not sorted!");
            }
            width = rvWidth;
            height = rvHeight;
        }
    }
 

public void validateScreenCapture() throws AWTException {
    Robot robot = new Robot();
    outputControlPanel = new JPanel(layout);
    GridBagConstraints ogbc = new GridBagConstraints();

    MultiResolutionImage image
            = robot.createMultiResolutionScreenCapture(inputImageFrame.getBounds());
    List<Image> imageList = image.getResolutionVariants();
    int size = imageList.size();
    BufferedImage lowResImage = (BufferedImage) imageList.get(0);
    BufferedImage highResImage = (BufferedImage) imageList.get(1);

    outputImageFrame = new JFrame("Output");
    outputImageFrame.getContentPane().setLayout(new GridBagLayout());
    ogbc.gridx = 0;
    ogbc.gridy = 0;
    ogbc.fill = GridBagConstraints.HORIZONTAL;
    outputControlPanel.add(new JLabel(new ImageIcon(lowResImage)), ogbc);
    int width = lowResImage.getWidth();
    int height = lowResImage.getHeight();
    JLabel labelImg1 = new JLabel("LEFT:Width: " + width
                                  + " Height: " + height);
    ogbc.gridx = 0;
    ogbc.gridy = 1;
    outputControlPanel.add(labelImg1, ogbc);
    ogbc.gridx = 1;
    ogbc.gridy = 0;
    outputControlPanel.add(new JLabel(new ImageIcon(highResImage)), ogbc);
    width = highResImage.getWidth();
    height = highResImage.getHeight();
    JLabel labelImg2 = new JLabel("RIGHT:Width: " + width
                                  + " Height: " + height);
    ogbc.gridx = 1;
    ogbc.gridy = 1;
    outputControlPanel.add(labelImg2, ogbc);
    outputControlPanel.setBackground(Color.GRAY);
    outputImageFrame.add(outputControlPanel);

    outputImageFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    outputImageFrame.setBounds(600, 0, 400, 300);
    outputImageFrame.setLocationRelativeTo(null);
    outputImageFrame.setVisible(true);
}