1 /*
   2  * Copyright (c) 2009, 2013, 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
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  23 
  24 /* @test
  25    @bug 6683775 6794764
  26    @summary Painting artifacts is seen when panel is made setOpaque(false) for a translucent window
  27    @author Alexander Potochkin
  28    @run main bug6683775
  29 */
  30 
  31 import com.sun.awt.AWTUtilities;
  32 import sun.awt.SunToolkit;
  33 
  34 import javax.swing.*;
  35 import java.awt.*;
  36 import java.awt.image.BufferedImage;
  37 
  38 public class bug6683775 {
  39     public static void main(String[] args) throws Exception {
  40         GraphicsConfiguration gc = getGC();
  41         if (!AWTUtilities.isTranslucencySupported(
  42                 AWTUtilities.Translucency.PERPIXEL_TRANSLUCENT)
  43                 || gc == null) {
  44             return;
  45         }
  46         SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
  47         Robot robot = new Robot();
  48         final JFrame testFrame = new JFrame(gc);
  49 
  50         SwingUtilities.invokeLater(new Runnable() {
  51             public void run() {
  52                 JFrame backgroundFrame = new JFrame("Background frame");
  53                 backgroundFrame.setUndecorated(true);
  54                 JPanel panel = new JPanel();
  55                 panel.setBackground(Color.RED);
  56                 backgroundFrame.add(panel);
  57                 backgroundFrame.setSize(200, 200);
  58                 backgroundFrame.setVisible(true);
  59 
  60                 testFrame.setUndecorated(true);
  61                 JPanel p = new JPanel();
  62                 p.setOpaque(false);
  63                 testFrame.add(p);
  64                 AWTUtilities.setWindowOpaque(testFrame, false);
  65                 testFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  66                 testFrame.setSize(400, 400);
  67                 testFrame.setLocation(0, 0);
  68                 testFrame.setVisible(true);
  69             }
  70         });
  71 
  72         toolkit.realSync();
  73 
  74         //robot.getPixelColor() didn't work right for some reason
  75         BufferedImage capture = robot.createScreenCapture(new Rectangle(100, 100));
  76 
  77         int redRGB = Color.RED.getRGB();
  78         if (redRGB != capture.getRGB(10, 10)) {
  79             throw new RuntimeException("Transparent frame is not transparent!");
  80         }
  81     }
  82 
  83     private static GraphicsConfiguration getGC() {
  84         GraphicsConfiguration transparencyCapableGC =
  85                 GraphicsEnvironment.getLocalGraphicsEnvironment()
  86                         .getDefaultScreenDevice().getDefaultConfiguration();
  87         if (!AWTUtilities.isTranslucencyCapable(transparencyCapableGC)) {
  88             transparencyCapableGC = null;
  89 
  90             GraphicsEnvironment env =
  91                     GraphicsEnvironment.getLocalGraphicsEnvironment();
  92             GraphicsDevice[] devices = env.getScreenDevices();
  93 
  94             for (int i = 0; i < devices.length && transparencyCapableGC == null; i++) {
  95                 GraphicsConfiguration[] configs = devices[i].getConfigurations();
  96                 for (int j = 0; j < configs.length && transparencyCapableGC == null; j++) {
  97                     if (AWTUtilities.isTranslucencyCapable(configs[j])) {
  98                         transparencyCapableGC = configs[j];
  99                     }
 100                 }
 101             }
 102         }
 103         return transparencyCapableGC;
 104     }
 105 }