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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import static java.awt.image.ImageObserver.*;
import java.io.File;
import javax.imageio.ImageIO;
/*
* @test
* @bug 8065627
* @summary Animated GIFs fail to display on a HiDPI display
* @author Alexander Scherbatiy
* @run main MultiResolutionImageObserverTest
*/
public class MultiResolutionImageObserverTest {
private static final int TIMEOUT = 500;
public static void main(String[] args) throws Exception {
generateImages();
Toolkit toolkit = Toolkit.getDefaultToolkit();
Image image = Toolkit.getDefaultToolkit().getImage(IMAGE_NAME_1X);
LoadImageObserver sizeObserver
= new LoadImageObserver(WIDTH | HEIGHT);
toolkit.prepareImage(image, -1, -1, sizeObserver);
waitForImageLoading(sizeObserver, "The first observer is not called");
LoadImageObserver bitsObserver
= new LoadImageObserver(SOMEBITS | FRAMEBITS | ALLBITS);
BufferedImage buffImage = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = (Graphics2D) buffImage.createGraphics();
g2d.scale(2, 2);
g2d.drawImage(image, 0, 0, bitsObserver);
waitForImageLoading(bitsObserver, "The second observer is not called!");
g2d.dispose();
}
private static void waitForImageLoading(LoadImageObserver observer,
String errorMessage) throws Exception {
long endTime = System.currentTimeMillis() + TIMEOUT;
while (!observer.loaded && System.currentTimeMillis() < endTime) {
Thread.sleep(TIMEOUT / 10);
}
if (!observer.loaded) {
throw new RuntimeException(errorMessage);
}
}
private static final String IMAGE_NAME_1X = "image.png";
private static final String IMAGE_NAME_2X = "image@2x.png";
private static void generateImages() throws Exception {
generateImage(1);
generateImage(2);
}
private static void generateImage(int scale) throws Exception {
BufferedImage image = new BufferedImage(
scale * 200, scale * 300,
BufferedImage.TYPE_INT_RGB);
Graphics g = image.createGraphics();
g.setColor(scale == 1 ? Color.GREEN : Color.BLUE);
g.fillRect(0, 0, scale * 200, scale * 300);
File file = new File(scale == 1 ? IMAGE_NAME_1X : IMAGE_NAME_2X);
ImageIO.write(image, "png", file);
g.dispose();
}
private static class LoadImageObserver implements ImageObserver {
private final int infoflags;
private boolean loaded;
public LoadImageObserver(int flags) {
this.infoflags = flags;
}
@Override
public boolean imageUpdate(Image img, int flags, int x, int y, int width, int height) {
if ((flags & infoflags) != 0) {
loaded = true;
}
return !loaded;
}
}
}
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