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  * @bug      8176795

    27  * @summary  Test verifies that we get proper color when we draw translucent

    28  *           color over an opaque color using X Render extension in Linux.

    29  * @requires (os.family == "linux")

    30  * @run      main XRenderTranslucentColorDrawTest -Dsun.java2d.xrender=true

    31  */

    32 

    33 import java.awt.Color;

    34 import java.awt.Graphics2D;

    35 import java.awt.GraphicsConfiguration;

    36 import java.awt.GraphicsDevice;

    37 import java.awt.GraphicsEnvironment;

    38 import java.awt.image.BufferedImage;

    39 import java.awt.image.VolatileImage;

    40 

    41 public class XRenderTranslucentColorDrawTest {

    42 

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

    44         GraphicsEnvironment env = GraphicsEnvironment.

    45                 getLocalGraphicsEnvironment();

    46         GraphicsConfiguration translucentGC = null;

    47         SCREENS: for (GraphicsDevice screen : env.getScreenDevices()) {

    48             for (GraphicsConfiguration gc : screen.getConfigurations()) {

    49                 if (gc.isTranslucencyCapable()) {

    50                     translucentGC = gc;

    51                     break SCREENS;

    52                 }

    53             }

    54         }

    55         if (translucentGC == null) {

    56             throw new RuntimeException("No suitable gc found.");

    57         }

    58         int width = 10;

    59         int height = 10;

    60         VolatileImage image = translucentGC.

    61                 createCompatibleVolatileImage(width, height);

    62         Graphics2D g = image.createGraphics();

    63         // draw opaque black color

    64         g.setColor(new Color(0xff000000, true));

    65         g.fillRect(0, 0, width, height);

    66         // draw translucent white color over opaque black color

    67         g.setColor(new Color(0x80ffffff, true));

    68         g.fillRect(0, 0, width, height);

    69         g.dispose();

    70         // Get snapshot of VolatileImage to pick color and verify the same

    71         BufferedImage snapshot = image.getSnapshot();

    72         int argb = snapshot.getRGB(width / 2, height / 2);

    73         // we expect the resultant rgb hex value to be ff808080

    74         if (!(Integer.toHexString(argb).equals("ff808080"))) {

    75             throw new RuntimeException("Using X Render extension for drawing"

    76                     + " translucent color is not giving expected results.");

    77         }

    78     }

    79 }

    80