1 /*

     2  * Copyright (c) 2012, 2016, 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.Graphics;

    26 import java.awt.GraphicsConfiguration;

    27 import java.awt.GraphicsEnvironment;

    28 import java.awt.Transparency;

    29 import java.awt.image.BufferedImage;

    30 import java.awt.image.VolatileImage;

    31 

    32 /**

    33  * @test

    34  * @key headful

    35  * @bug 7181438

    36  * @summary Verifies that we get correct alpha, when we draw opaque

    37  * BufferedImage to non opaque VolatileImage via intermediate opaque texture.

    38  * @author Sergey Bylokhov

    39  * @run main/othervm -Dsun.java2d.accthreshold=0 bug7181438

    40  */

    41 public final class bug7181438 {

    42 

    43     private static final int SIZE = 500;

    44 

    45     public static void main(final String[] args) {

    46 

    47         final BufferedImage bi = createBufferedImage();

    48         final VolatileImage vi = createVolatileImage();

    49         final Graphics s2dVi = vi.getGraphics();

    50 

    51         //sw->texture->surface blit

    52         s2dVi.drawImage(bi, 0, 0, null);

    53 

    54         final BufferedImage results = vi.getSnapshot();

    55         for (int i = 0; i < SIZE; ++i) {

    56             for (int j = 0; j < SIZE; ++j) {

    57                 //Image should be opaque: (black color and alpha = 255)

    58                 if (results.getRGB(i, j) != 0xFF000000) {

    59                     throw new RuntimeException("Failed: Wrong alpha");

    60                 }

    61             }

    62         }

    63         System.out.println("Passed");

    64     }

    65 

    66 

    67     private static VolatileImage createVolatileImage() {

    68         final GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();

    69         final GraphicsConfiguration gc = ge.getDefaultScreenDevice().getDefaultConfiguration();

    70         return gc.createCompatibleVolatileImage(SIZE, SIZE,

    71                                                 Transparency.TRANSLUCENT);

    72     }

    73 

    74     private static BufferedImage createBufferedImage() {

    75         final BufferedImage bi = new BufferedImage(SIZE, SIZE,

    76                                                    BufferedImage.TYPE_INT_RGB);

    77         final Graphics bg = bi.getGraphics();

    78         //Black color and alpha = 0

    79         bg.setColor(new Color(0, 0, 0, 0));

    80         bg.fillRect(0, 0, SIZE, SIZE);

    81         bg.dispose();

    82         return bi;

    83     }

    84 }