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 /**

    25  * @test

    26  * @key headful

    27  * @bug 8204931

    28  * @summary test alpha colors are blended with background.

    29  */

    30 

    31 import java.awt.Color;

    32 import java.awt.Component;

    33 import java.awt.Dimension;

    34 import java.awt.Frame;

    35 import java.awt.Graphics;

    36 import java.awt.Robot;

    37 import javax.swing.SwingUtilities;

    38 

    39 public class AlphaColorTest extends Component {

    40 

    41     private Color color;

    42 

    43     public AlphaColorTest(Color c) {

    44        this.color = c;

    45     }

    46 

    47     public void paint(Graphics g) {

    48         g.setColor(color);

    49         g.fillRect(0, 0, getSize().width, getSize().height);

    50     }

    51 

    52     public Dimension getPreferredSize() {

    53         return getSize();

    54     }

    55 

    56     public Dimension getSize() {

    57         return new Dimension(200, 200);

    58     }

    59 

    60     public static void main(String args[]) throws Exception {

    61         SwingUtilities.invokeAndWait(() -> createAndShowGUI());

    62         Robot robot = new Robot();

    63         robot.delay(5000);

    64         robot.waitForIdle();

    65         Color c = robot.getPixelColor(frame.getX() + 100, frame.getY() + 100);

    66         int red = c.getRed();

    67         frame.dispose();

    68         // Should be 126-128, but be tolerant of gamma correction.

    69         if (red < 122 || red > 132) {

    70             throw new RuntimeException("Color is not as expected. Got " + c);

    71         }

    72      }

    73 

    74     static Frame frame;

    75     private static void createAndShowGUI() {

    76         frame = new Frame("Alpha Color Test");

    77         frame.setBackground(Color.black);

    78         Color color = new Color(255, 255, 255, 127);

    79         frame.add("Center", new AlphaColorTest(color));

    80         frame.pack();

    81         frame.setVisible(true);

    82     }

    83 }