test/javax/swing/JComponent/6683775/bug6683775.java

*** 1,7 ****
  /*
!  * Copyright (c) 2009, 2016, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2009, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 22,54 ****
   */
  
  /*
   * @test
   * @key headful
!  * @bug 6683775 6794764
!  * @summary Painting artifacts is seen when panel is made setOpaque(false) for a translucent window
!  * @author Alexander Potochkin
!  * @modules java.desktop/com.sun.awt
!  *          java.desktop/sun.awt
!  * @run main bug6683775
   */
  
! import com.sun.awt.AWTUtilities;
! 
! import javax.swing.*;
! import java.awt.*;
  import java.awt.image.BufferedImage;
  
  public class bug6683775 {
      static final int LOC = 100,
              SIZE = 200;
  
      public static void main(String[] args) throws Exception {
          GraphicsConfiguration gc = getGC();
!        if (!AWTUtilities.isTranslucencySupported(
!                AWTUtilities.Translucency.PERPIXEL_TRANSLUCENT)
!                 || gc == null) {
              return;
          }
          Robot robot = new Robot();
          final JFrame testFrame = new JFrame(gc);
  
--- 22,57 ----
   */
  
  /*
   * @test
   * @key headful
!  * @bug 6683775 6794764 8186617
!  * @summary Painting artifacts is seen when panel is made setOpaque(false) for a
!  *          translucent window
   */
  
! import java.awt.Color;
! import java.awt.GraphicsConfiguration;
! import java.awt.GraphicsDevice;
! import java.awt.GraphicsEnvironment;
! import java.awt.Rectangle;
! import java.awt.Robot;
! import java.awt.Window;
  import java.awt.image.BufferedImage;
  
+ import javax.swing.JFrame;
+ import javax.swing.JPanel;
+ import javax.swing.SwingUtilities;
+ 
  public class bug6683775 {
      static final int LOC = 100,
              SIZE = 200;
  
      public static void main(String[] args) throws Exception {
          GraphicsConfiguration gc = getGC();
!         if (gc == null || !gc.getDevice().isWindowTranslucencySupported(
!                 GraphicsDevice.WindowTranslucency.PERPIXEL_TRANSLUCENT)) {
              return;
          }
          Robot robot = new Robot();
          final JFrame testFrame = new JFrame(gc);
  
*** 63,73 ****
  
              testFrame.setUndecorated(true);
              JPanel p = new JPanel();
              p.setOpaque(false);
              testFrame.add(p);
!             AWTUtilities.setWindowOpaque(testFrame, false);
              testFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              testFrame.setBounds(LOC, LOC, SIZE, SIZE);
              testFrame.setVisible(true);
          });
  
--- 66,76 ----
  
              testFrame.setUndecorated(true);
              JPanel p = new JPanel();
              p.setOpaque(false);
              testFrame.add(p);
!             setOpaque(testFrame, false);
              testFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              testFrame.setBounds(LOC, LOC, SIZE, SIZE);
              testFrame.setVisible(true);
          });
  
*** 76,106 ****
  
          //robot.getPixelColor() didn't work right for some reason
          BufferedImage capture =
                  robot.createScreenCapture(new Rectangle(LOC, LOC, SIZE, SIZE));
  
          int redRGB = Color.RED.getRGB();
          if (redRGB != capture.getRGB(SIZE/2, SIZE/2)) {
              throw new RuntimeException("Transparent frame is not transparent!");
          }
      }
  
      private static GraphicsConfiguration getGC() {
          GraphicsConfiguration transparencyCapableGC =
                  GraphicsEnvironment.getLocalGraphicsEnvironment()
                          .getDefaultScreenDevice().getDefaultConfiguration();
!         if (!AWTUtilities.isTranslucencyCapable(transparencyCapableGC)) {
              transparencyCapableGC = null;
  
              GraphicsEnvironment env =
                      GraphicsEnvironment.getLocalGraphicsEnvironment();
              GraphicsDevice[] devices = env.getScreenDevices();
  
              for (int i = 0; i < devices.length && transparencyCapableGC == null; i++) {
                  GraphicsConfiguration[] configs = devices[i].getConfigurations();
                  for (int j = 0; j < configs.length && transparencyCapableGC == null; j++) {
!                     if (AWTUtilities.isTranslucencyCapable(configs[j])) {
                          transparencyCapableGC = configs[j];
                      }
                  }
              }
          }
--- 79,120 ----
  
          //robot.getPixelColor() didn't work right for some reason
          BufferedImage capture =
                  robot.createScreenCapture(new Rectangle(LOC, LOC, SIZE, SIZE));
  
+         SwingUtilities.invokeAndWait(testFrame::dispose);
+ 
          int redRGB = Color.RED.getRGB();
          if (redRGB != capture.getRGB(SIZE/2, SIZE/2)) {
              throw new RuntimeException("Transparent frame is not transparent!");
          }
      }
  
+     public static void setOpaque(Window window, boolean opaque) {
+         Color bg = window.getBackground();
+         if (bg == null) {
+             bg = new Color(0, 0, 0, 0);
+         }
+         window.setBackground(new Color(bg.getRed(), bg.getGreen(), bg.getBlue(),
+                                        opaque ? 255 : 0));
+     }
+ 
      private static GraphicsConfiguration getGC() {
          GraphicsConfiguration transparencyCapableGC =
                  GraphicsEnvironment.getLocalGraphicsEnvironment()
                          .getDefaultScreenDevice().getDefaultConfiguration();
!         if (!transparencyCapableGC.isTranslucencyCapable()) {
              transparencyCapableGC = null;
  
              GraphicsEnvironment env =
                      GraphicsEnvironment.getLocalGraphicsEnvironment();
              GraphicsDevice[] devices = env.getScreenDevices();
  
              for (int i = 0; i < devices.length && transparencyCapableGC == null; i++) {
                  GraphicsConfiguration[] configs = devices[i].getConfigurations();
                  for (int j = 0; j < configs.length && transparencyCapableGC == null; j++) {
!                     if (configs[j].isTranslucencyCapable()) {
                          transparencyCapableGC = configs[j];
                      }
                  }
              }
          }