1 /* 2 * Copyright (c) 2009, 2017, 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 /* 25 * @test 26 * @key headful 27 * @bug 6683775 6794764 8186617 28 * @summary Painting artifacts is seen when panel is made setOpaque(false) for a 29 * translucent window 30 */ 31 32 import java.awt.Color; 33 import java.awt.GraphicsConfiguration; 34 import java.awt.GraphicsDevice; 35 import java.awt.GraphicsEnvironment; 36 import java.awt.Rectangle; 37 import java.awt.Robot; 38 import java.awt.Window; 39 import java.awt.image.BufferedImage; 40 41 import javax.swing.JFrame; 42 import javax.swing.JPanel; 43 import javax.swing.SwingUtilities; 44 45 public class bug6683775 { 46 static final int LOC = 100, 47 SIZE = 200; 48 49 public static void main(String[] args) throws Exception { 50 GraphicsConfiguration gc = getGC(); 51 if (gc == null || !gc.getDevice().isWindowTranslucencySupported( 52 GraphicsDevice.WindowTranslucency.PERPIXEL_TRANSLUCENT)) { 53 return; 54 } 55 Robot robot = new Robot(); 56 final JFrame testFrame = new JFrame(gc); 57 58 SwingUtilities.invokeAndWait(() -> { 59 JFrame backgroundFrame = new JFrame("Background frame"); 60 backgroundFrame.setUndecorated(true); 61 JPanel panel = new JPanel(); 62 panel.setBackground(Color.RED); 63 backgroundFrame.add(panel); 64 backgroundFrame.setBounds(LOC, LOC, SIZE, SIZE); 65 backgroundFrame.setVisible(true); 66 67 testFrame.setUndecorated(true); 68 JPanel p = new JPanel(); 69 p.setOpaque(false); 70 testFrame.add(p); 71 setOpaque(testFrame, false); 72 testFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 73 testFrame.setBounds(LOC, LOC, SIZE, SIZE); 74 testFrame.setVisible(true); 75 }); 76 77 robot.waitForIdle(); 78 Thread.sleep(1500); 79 80 //robot.getPixelColor() didn't work right for some reason 81 BufferedImage capture = 82 robot.createScreenCapture(new Rectangle(LOC, LOC, SIZE, SIZE)); 83 84 SwingUtilities.invokeAndWait(testFrame::dispose); 85 86 int redRGB = Color.RED.getRGB(); 87 if (redRGB != capture.getRGB(SIZE/2, SIZE/2)) { 88 throw new RuntimeException("Transparent frame is not transparent!"); 89 } 90 } 91 92 public static void setOpaque(Window window, boolean opaque) { 93 Color bg = window.getBackground(); 94 if (bg == null) { 95 bg = new Color(0, 0, 0, 0); 96 } 97 window.setBackground(new Color(bg.getRed(), bg.getGreen(), bg.getBlue(), 98 opaque ? 255 : 0)); 99 } 100 101 private static GraphicsConfiguration getGC() { 102 GraphicsConfiguration transparencyCapableGC = 103 GraphicsEnvironment.getLocalGraphicsEnvironment() 104 .getDefaultScreenDevice().getDefaultConfiguration(); 105 if (!transparencyCapableGC.isTranslucencyCapable()) { 106 transparencyCapableGC = null; 107 108 GraphicsEnvironment env = 109 GraphicsEnvironment.getLocalGraphicsEnvironment(); 110 GraphicsDevice[] devices = env.getScreenDevices(); 111 112 for (int i = 0; i < devices.length && transparencyCapableGC == null; i++) { 113 GraphicsConfiguration[] configs = devices[i].getConfigurations(); 114 for (int j = 0; j < configs.length && transparencyCapableGC == null; j++) { 115 if (configs[j].isTranslucencyCapable()) { 116 transparencyCapableGC = configs[j]; 117 } 118 } 119 } 120 } 121 return transparencyCapableGC; 122 } 123 }