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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
  @test
  @bug 8148619
  @summary Select the closest resolution variant in BaseMultiResolutionImage
  @run main/othervm -Dsun.java2d.uiScale=1 MultiResolutionVariantSelectionTest
  @run main/othervm -Dsun.java2d.uiScale=2 MultiResolutionVariantSelectionTest
  @run main/othervm -Dsun.java2d.uiScale=3 MultiResolutionVariantSelectionTest
  @run main/othervm -Dsun.java2d.uiScale=4 MultiResolutionVariantSelectionTest
*/

import java.awt.*;
import java.awt.image.*;

public class MultiResolutionVariantSelectionTest {

    static Color[] colors = {Color.RED, Color.GREEN, Color.BLUE};
    static int W = 100, H = 100;

    public static void main(String[] args) throws Exception {
        Image[] images = new Image[colors.length];
        for (int i = colors.length - 1; i >= 0; i--) {
            images[i] = generateImage(i + 1, colors[i]);
        }
        Image mrImage =new BaseMultiResolutionImage(images);

        Frame frame = new Frame();
        Panel panel = new Panel() {
            @Override
            public void paint(Graphics g) {
                super.paint(g);
                g.drawImage(mrImage, 0, 0, W, H, null);
            }
        };
        panel.setPreferredSize(new Dimension(W, H));
        frame.add(panel);
        frame.pack();
        frame.setVisible(true);

        Robot robot = new Robot();
        robot.delay(200);
        robot.waitForIdle();

        Point p = panel.getLocationOnScreen();
        p.translate(W / 2, H / 2);
        Color color = robot.getPixelColor(p.x, p.y);
        int expected = Math.min(
                Integer.parseInt(System.getProperty("sun.java2d.uiScale")),
                colors.length) - 1;
        if (!color.equals(colors[expected])) {
            throw new RuntimeException("Wrong image variant painted " + color);
        }
    }

    private static BufferedImage generateImage(int scale, Color c) {
        BufferedImage image = new BufferedImage(
                scale * W, scale * H, BufferedImage.TYPE_INT_RGB);
        Graphics g = image.getGraphics();
        g.setColor(c);
        g.fillRect(0, 0, scale * W + 1, scale * H + 1);
        g.dispose();
        return image;
    }
}