1 /*
   2  * Copyright (c) 2013, 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 /*
  25  * @test
  26  * @key headful
  27  * @bug 8007146 8213119
  28  * @summary [macosx] Setting a display mode crashes JDK under VNC
  29  * @author Alexander Scherbatiy
  30  * @run main CheckDisplayModes
  31  */
  32 import java.awt.DisplayMode;
  33 import java.awt.GraphicsDevice;
  34 import java.awt.GraphicsEnvironment;
  35 
  36 public class CheckDisplayModes {
  37 
  38     public static void main(String[] args) {
  39         GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
  40         for (GraphicsDevice graphicDevice : ge.getScreenDevices()) {
  41             if (!graphicDevice.isDisplayChangeSupported()) {
  42                 System.err.println("Display mode change is not supported on this host. Test is considered passed.");
  43                 continue;
  44             }
  45             DisplayMode defaultDisplayMode = graphicDevice.getDisplayMode();
  46             checkDisplayMode(defaultDisplayMode);
  47             graphicDevice.setDisplayMode(defaultDisplayMode);
  48 
  49             DisplayMode[] displayModes = graphicDevice.getDisplayModes();
  50             boolean isDefaultDisplayModeIncluded = false;
  51             for (DisplayMode displayMode : displayModes) {
  52                 checkDisplayMode(displayMode);
  53                 graphicDevice.setDisplayMode(displayMode);
  54                 if (defaultDisplayMode.equals(displayMode)) {
  55                     isDefaultDisplayModeIncluded = true;
  56                 }
  57             }
  58 
  59             if (!isDefaultDisplayModeIncluded) {
  60                 throw new RuntimeException("Default display mode is not included");
  61             }
  62         }
  63     }
  64 
  65     static void checkDisplayMode(DisplayMode displayMode) {
  66         if (displayMode == null || displayMode.getWidth() <= 1 || displayMode.getHeight() <= 1) {
  67             throw new RuntimeException("invalid display mode");
  68         }
  69     }
  70 }