1 /*
   2  * Copyright (c) 2009, 2015, 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 /* @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    @modules java.desktop/com.sun.awt
  29             java.desktop/sun.awt
  30    @run main bug6683775
  31 */
  32 
  33 import com.sun.awt.AWTUtilities;
  34 
  35 import javax.swing.*;
  36 import java.awt.*;
  37 import java.awt.image.BufferedImage;
  38 
  39 public class bug6683775 {
  40     static final int LOC = 100,
  41             SIZE = 200;
  42 
  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         Robot robot = new Robot();
  51         final JFrame testFrame = new JFrame(gc);
  52 
  53         SwingUtilities.invokeAndWait(() -> {
  54             JFrame backgroundFrame = new JFrame("Background frame");
  55             backgroundFrame.setUndecorated(true);
  56             JPanel panel = new JPanel();
  57             panel.setBackground(Color.RED);
  58             backgroundFrame.add(panel);
  59             backgroundFrame.setBounds(LOC, LOC, SIZE, SIZE);
  60             backgroundFrame.setVisible(true);
  61 
  62             testFrame.setUndecorated(true);
  63             JPanel p = new JPanel();
  64             p.setOpaque(false);
  65             testFrame.add(p);
  66             AWTUtilities.setWindowOpaque(testFrame, false);
  67             testFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  68             testFrame.setBounds(LOC, LOC, SIZE, SIZE);
  69             testFrame.setVisible(true);
  70         });
  71 
  72         robot.waitForIdle();
  73         Thread.sleep(1500);
  74 
  75         //robot.getPixelColor() didn't work right for some reason
  76         BufferedImage capture =
  77                 robot.createScreenCapture(new Rectangle(LOC, LOC, SIZE, SIZE));
  78 
  79         int redRGB = Color.RED.getRGB();
  80         if (redRGB != capture.getRGB(SIZE/2, SIZE/2)) {
  81             throw new RuntimeException("Transparent frame is not transparent!");
  82         }
  83     }
  84 
  85     private static GraphicsConfiguration getGC() {
  86         GraphicsConfiguration transparencyCapableGC =
  87                 GraphicsEnvironment.getLocalGraphicsEnvironment()
  88                         .getDefaultScreenDevice().getDefaultConfiguration();
  89         if (!AWTUtilities.isTranslucencyCapable(transparencyCapableGC)) {
  90             transparencyCapableGC = null;
  91 
  92             GraphicsEnvironment env =
  93                     GraphicsEnvironment.getLocalGraphicsEnvironment();
  94             GraphicsDevice[] devices = env.getScreenDevices();
  95 
  96             for (int i = 0; i < devices.length && transparencyCapableGC == null; i++) {
  97                 GraphicsConfiguration[] configs = devices[i].getConfigurations();
  98                 for (int j = 0; j < configs.length && transparencyCapableGC == null; j++) {
  99                     if (AWTUtilities.isTranslucencyCapable(configs[j])) {
 100                         transparencyCapableGC = configs[j];
 101                     }
 102                 }
 103             }
 104         }
 105         return transparencyCapableGC;
 106     }
 107 }