1 /*
   2  * Copyright (c) 2009, 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 6683775 6794764
  28  * @summary Painting artifacts is seen when panel is made setOpaque(false) for a translucent window
  29  * @author Alexander Potochkin
  30  * @modules java.desktop/com.sun.awt
  31  *          java.desktop/sun.awt
  32  * @run main bug6683775
  33  */
  34 
  35 import com.sun.awt.AWTUtilities;
  36 import sun.awt.SunToolkit;
  37 
  38 import javax.swing.*;
  39 import java.awt.*;
  40 import java.awt.image.BufferedImage;
  41 
  42 public class bug6683775 {
  43     public static void main(String[] args) throws Exception {
  44         GraphicsConfiguration gc = getGC();
  45         if (!AWTUtilities.isTranslucencySupported(
  46                 AWTUtilities.Translucency.PERPIXEL_TRANSLUCENT)
  47                 || gc == null) {
  48             return;
  49         }
  50         SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
  51         Robot robot = new Robot();
  52         final JFrame testFrame = new JFrame(gc);
  53 
  54         SwingUtilities.invokeLater(new Runnable() {
  55             public void run() {
  56                 JFrame backgroundFrame = new JFrame("Background frame");
  57                 backgroundFrame.setUndecorated(true);
  58                 JPanel panel = new JPanel();
  59                 panel.setBackground(Color.RED);
  60                 backgroundFrame.add(panel);
  61                 backgroundFrame.setSize(200, 200);
  62                 backgroundFrame.setVisible(true);
  63 
  64                 testFrame.setUndecorated(true);
  65                 JPanel p = new JPanel();
  66                 p.setOpaque(false);
  67                 testFrame.add(p);
  68                 AWTUtilities.setWindowOpaque(testFrame, false);
  69                 testFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  70                 testFrame.setSize(400, 400);
  71                 testFrame.setLocation(0, 0);
  72                 testFrame.setVisible(true);
  73             }
  74         });
  75 
  76         toolkit.realSync();
  77 
  78         //robot.getPixelColor() didn't work right for some reason
  79         BufferedImage capture = robot.createScreenCapture(new Rectangle(100, 100));
  80 
  81         int redRGB = Color.RED.getRGB();
  82         if (redRGB != capture.getRGB(10, 10)) {
  83             throw new RuntimeException("Transparent frame is not transparent!");
  84         }
  85     }
  86 
  87     private static GraphicsConfiguration getGC() {
  88         GraphicsConfiguration transparencyCapableGC =
  89                 GraphicsEnvironment.getLocalGraphicsEnvironment()
  90                         .getDefaultScreenDevice().getDefaultConfiguration();
  91         if (!AWTUtilities.isTranslucencyCapable(transparencyCapableGC)) {
  92             transparencyCapableGC = null;
  93 
  94             GraphicsEnvironment env =
  95                     GraphicsEnvironment.getLocalGraphicsEnvironment();
  96             GraphicsDevice[] devices = env.getScreenDevices();
  97 
  98             for (int i = 0; i < devices.length && transparencyCapableGC == null; i++) {
  99                 GraphicsConfiguration[] configs = devices[i].getConfigurations();
 100                 for (int j = 0; j < configs.length && transparencyCapableGC == null; j++) {
 101                     if (AWTUtilities.isTranslucencyCapable(configs[j])) {
 102                         transparencyCapableGC = configs[j];
 103                     }
 104                 }
 105             }
 106         }
 107         return transparencyCapableGC;
 108     }
 109 }