1 /* 2 * Copyright (c) 2018, 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 import java.awt.Color; 25 import java.awt.Frame; 26 import java.awt.Point; 27 import java.awt.Robot; 28 import java.util.List; 29 30 /** 31 * @test 32 * @key headful 33 * @bug 8215105 34 * @summary tests that Robot can capture the common colors without artifacts 35 */ 36 public final class CheckCommonColors { 37 38 private static final Frame frame = new Frame(); 39 private static Robot robot; 40 41 public static void main(final String[] args) throws Exception { 42 robot = new Robot(); 43 try { 44 test(); 45 } finally { 46 frame.dispose(); 47 } 48 } 49 50 private static void test() { 51 frame.setSize(400, 400); 52 frame.setLocationRelativeTo(null); 53 frame.setUndecorated(true); 54 for (final Color color : List.of(Color.WHITE, Color.LIGHT_GRAY, 55 Color.GRAY, Color.DARK_GRAY, 56 Color.BLACK, Color.RED, Color.PINK, 57 Color.ORANGE, Color.YELLOW, 58 Color.GREEN, Color.MAGENTA, Color.CYAN, 59 Color.BLUE)) { 60 frame.dispose(); 61 frame.setBackground(color); 62 frame.setVisible(true); 63 checkPixels(color); 64 } 65 } 66 67 private static void checkPixels(final Color color) { 68 int attempt = 0; 69 while (true) { 70 Point p = frame.getLocationOnScreen(); 71 Color pixel = robot.getPixelColor(p.x + frame.getWidth() / 2, 72 p.y + frame.getHeight() / 2); 73 if (color.equals(pixel)) { 74 return; 75 } 76 if (attempt > 10) { 77 System.err.println("Expected: " + color); 78 System.err.println("Actual: " + pixel); 79 throw new RuntimeException("Too many attempts: " + attempt); 80 } 81 // skip Robot.waitForIdle to speedup the common case, but also take 82 // care about slow systems 83 robot.delay((int) Math.pow(2.2, attempt++)); 84 } 85 } 86 }