test/jdk/java/awt/Robot/CheckCommonColors/CheckCommonColors.java

rev 60071 : 8211999: Window positioning bugs due to overlapping GraphicsDevice bounds (Windows/HiDPI)
Reviewed-by: XXX

*** 1,7 ****
  /*
!  * Copyright (c) 2018, 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) 2018, 2020, 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.
*** 21,77 ****
   * questions.
   */
  
  import java.awt.Color;
  import java.awt.Frame;
  import java.awt.Point;
  import java.awt.Robot;
  import java.util.List;
  
  /**
   * @test
   * @key headful
!  * @bug 8215105
   * @summary tests that Robot can capture the common colors without artifacts
   */
  public final class CheckCommonColors {
  
      private static final Frame frame = new Frame();
      private static Robot robot;
  
      public static void main(final String[] args) throws Exception {
          robot = new Robot();
          try {
!             test();
          } finally {
              frame.dispose();
          }
      }
  
!     private static void test() {
          frame.setSize(400, 400);
!         frame.setLocationRelativeTo(null);
          frame.setUndecorated(true);
          for (final Color color : List.of(Color.WHITE, Color.LIGHT_GRAY,
                                           Color.GRAY, Color.DARK_GRAY,
                                           Color.BLACK, Color.RED, Color.PINK,
                                           Color.ORANGE, Color.YELLOW,
                                           Color.GREEN, Color.MAGENTA, Color.CYAN,
                                           Color.BLUE)) {
              frame.dispose();
              frame.setBackground(color);
              frame.setVisible(true);
!             checkPixels(color);
          }
      }
  
!     private static void checkPixels(final Color color) {
          int attempt = 0;
          while (true) {
              Point p = frame.getLocationOnScreen();
!             Color pixel = robot.getPixelColor(p.x + frame.getWidth() / 2,
!                                               p.y + frame.getHeight() / 2);
              if (color.equals(pixel)) {
                  return;
              }
              if (attempt > 10) {
                  System.err.println("Expected: " + color);
--- 21,94 ----
   * questions.
   */
  
  import java.awt.Color;
  import java.awt.Frame;
+ import java.awt.GraphicsDevice;
+ import java.awt.GraphicsEnvironment;
  import java.awt.Point;
+ import java.awt.Rectangle;
  import java.awt.Robot;
+ import java.awt.image.BufferedImage;
  import java.util.List;
  
  /**
   * @test
   * @key headful
!  * @bug 8215105 8211999
   * @summary tests that Robot can capture the common colors without artifacts
   */
  public final class CheckCommonColors {
  
      private static final Frame frame = new Frame();
      private static Robot robot;
  
      public static void main(final String[] args) throws Exception {
          robot = new Robot();
+         var ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
+         for (GraphicsDevice gd : ge.getScreenDevices()) {
              try {
!                 test(gd.getDefaultConfiguration().getBounds());
              } finally {
                  frame.dispose();
              }
          }
+     }
  
!     private static void test(Rectangle screen) {
          frame.setSize(400, 400);
!         frame.setLocation((int)screen.getCenterX() - 200,
!                           (int)screen.getCenterY() - 200);
          frame.setUndecorated(true);
          for (final Color color : List.of(Color.WHITE, Color.LIGHT_GRAY,
                                           Color.GRAY, Color.DARK_GRAY,
                                           Color.BLACK, Color.RED, Color.PINK,
                                           Color.ORANGE, Color.YELLOW,
                                           Color.GREEN, Color.MAGENTA, Color.CYAN,
                                           Color.BLUE)) {
              frame.dispose();
              frame.setBackground(color);
              frame.setVisible(true);
!             checkPixels(color, true);
!             checkPixels(color, false);
          }
      }
  
!     private static void checkPixels(final Color color, boolean useRect) {
!         System.out.println("color = " + color + ", useRect = " + useRect);
          int attempt = 0;
          while (true) {
              Point p = frame.getLocationOnScreen();
!             Color pixel;
!             Rectangle rect = new Rectangle(p.x + frame.getWidth() / 2,
!                                            p.y + frame.getHeight() / 2, 1, 1);
!             if (useRect) {
!                 BufferedImage bi = robot.createScreenCapture(rect);
!                 pixel = new Color(bi.getRGB(0, 0));
!             } else {
!                 pixel = robot.getPixelColor(rect.x, rect.y);
!             }
              if (color.equals(pixel)) {
                  return;
              }
              if (attempt > 10) {
                  System.err.println("Expected: " + color);