1 /*
   2  * Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.awt.*;
  25 import java.awt.MultipleGradientPaint.*;
  26 import java.awt.image.*;
  27 import java.io.*;
  28 
  29 import javax.imageio.*;
  30 import javax.swing.*;
  31 
  32 /**
  33  * @test
  34  * @key headful
  35  * @bug 8028722
  36  * @summary tests wether drawString with 254 characters causes the xrender
  37  *          pipeline to hang.
  38  * @author ceisserer
  39  */
  40 public class XRenderElt254TextTest extends Frame implements Runnable {
  41     public volatile boolean success = false;
  42 
  43     public void run() {
  44         Image dstImg = getGraphicsConfiguration().createCompatibleVolatileImage(400, 400);
  45         Graphics2D g = (Graphics2D) dstImg.getGraphics();
  46 
  47         StringBuilder strBuilder = new StringBuilder(254);
  48         for (int c = 0; c < 254; c++) {
  49           strBuilder.append('a');
  50         }
  51 
  52         for (int i = 0; i < 100; i++) {
  53             g.drawString(strBuilder.toString(), 20, 20);
  54             Toolkit.getDefaultToolkit().sync();
  55         }
  56         success = true;
  57     }
  58 
  59     public static void main(String[] args) throws Exception {
  60         XRenderElt254TextTest test = new XRenderElt254TextTest();
  61         new Thread(test).start();
  62 
  63         for (int i = 0; i < 30; i++) {
  64             Thread.sleep(1000);
  65 
  66             if (test.success) {
  67             return; // Test finished successful
  68             }
  69         }
  70 
  71         throw new RuntimeException("Test Failed");
  72     }
  73 }