/*
* Copyright (c) 2007, 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.
*
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*/
/**
* @test
* @bug 6547241
* @summary Test verifies that concurrent usage of jpeg writer instance
* by number of threads does not cause crash in jpeg library.
* @run main ConcurrentWritingTest
*/
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.geom.Point2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
public class ConcurrentWritingTest extends Thread {
static ImageWriter w = null;
static File pwd = new File(".");
static BufferedImage img;
private static int MAX_THREADS = 50;
private static int completeCount = 0;
private static Object lock = new Object();
public static void main(String[] args) throws Exception {
img = createTestImage();
w = ImageIO.getImageWritersByFormatName("JPEG").next();
for (int i = 0; i < MAX_THREADS; i++) {
(new ConcurrentWritingTest()).start();
}
// wait for threads
boolean needWait = true;
while(needWait) {
synchronized(lock) {
needWait = completeCount < MAX_THREADS;
}
}
System.out.println("Test PASSED");
}
public void run() {
try {
File f = File.createTempFile("writer_", ".jpg", pwd);
ImageOutputStream ios = ImageIO.createImageOutputStream(f);
w.setOutput(ios);
Thread.sleep(70);
w.write(img);
Thread.sleep(70);
w.reset();
} catch (IllegalStateException e) {
System.out.println(e);
} catch (IOException e) {
System.out.println(e);
} catch (Throwable e) {
// Unexpected exception. Test failed.
throw new RuntimeException("Test failed.", e);
} finally {
synchronized(lock) {
completeCount ++;
}
}
}
private static BufferedImage createTestImage() {
int w = 1024;
int h = 768;
BufferedImage img = new
BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g = img.createGraphics();
Color[] colors = { Color.red, Color.green, Color.blue };
float[] dist = {0.0f, 0.5f, 1.0f };
Point2D center = new Point2D.Float(0.5f * w, 0.5f * h);
RadialGradientPaint p =
new RadialGradientPaint(center, 0.5f * w, dist, colors);
g.setPaint(p);
g.fillRect(0, 0, w, h);
g.dispose();
return img;
}
}