1 /*

     2  * Copyright (c) 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 import java.awt.Color;

    25 import java.awt.EventQueue;

    26 import java.awt.Graphics2D;

    27 import java.awt.image.BufferedImage;

    28 import java.io.File;

    29 import java.io.IOException;

    30 import java.util.List;

    31 

    32 import javax.imageio.ImageIO;

    33 import javax.swing.JEditorPane;

    34 import javax.swing.text.html.HTMLEditorKit;

    35 

    36 /**

    37  * @test

    38  * @bug 8134256

    39  * @summary Different "background-position" should produce different pages

    40  */

    41 public final class BackgroundImagePosition {

    42 

    43     static final List<String> pos = List.of("", "-2", "-1", "1px", "2px", "3px",

    44                                             "1em", "2em", "3em", "10%", "55%",

    45                                             "-1em", "-2em", "-3em", "-10%");

    46     static final int SIZE = 300;

    47 

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

    49         // The image which we will place on the page

    50         final BufferedImage bi = new BufferedImage(50, 50,

    51                                                    BufferedImage.TYPE_INT_ARGB);

    52         final Graphics2D g = bi.createGraphics();

    53         g.setColor(Color.GREEN);

    54         g.fillRect(0, 0, 50, 50);

    55         g.dispose();

    56         final File file = new File("file.png");

    57         ImageIO.write(bi, "png", file);

    58         for (final String x : pos) {

    59             final BufferedImage img1 = test(x, x);

    60             for (final String y : pos) {

    61                 // Different positions should produce different pages

    62                 if (!x.equals(y)) {

    63                     compareImages(img1, test(x, y));

    64                     compareImages(img1, test(y, x));

    65                 }

    66             }

    67         }

    68     }

    69 

    70     /**

    71      * Throws an exception if the images are the same.

    72      */

    73     static void compareImages(final BufferedImage img1,

    74                               final BufferedImage img2) throws IOException {

    75         for (int imgX = 0; imgX < SIZE; ++imgX) {

    76             for (int imgY = 0; imgY < SIZE; ++imgY) {

    77                 if (img1.getRGB(imgX, imgY) != img2.getRGB(imgX, imgY)) {

    78                     return;

    79                 }

    80             }

    81         }

    82         ImageIO.write(img1, "png", new File("img1.png"));

    83         ImageIO.write(img2, "png", new File("img2.png"));

    84         throw new RuntimeException("Same images for different size");

    85     }

    86 

    87     static BufferedImage test(final String x, final String y) throws Exception {

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

    89                                                    BufferedImage.TYPE_INT_ARGB);

    90         EventQueue.invokeAndWait(() -> {

    91             try {

    92                 final JEditorPane jep = new JEditorPane();

    93 

    94                 final HTMLEditorKit kit = new HTMLEditorKit();

    95                 jep.setEditorKit(kit);

    96                 jep.setText(

    97                         "<style>body {"

    98                                 + "background-image: url(file:./file.png);"

    99                                 + "background-repeat: no-repeat;"

   100                                 + "background-position: " + x + " " + y + ";"

   101                                 + "background-color: #FF0000;"

   102                                 + "}</style><body></body>");

   103                 jep.setSize(SIZE, SIZE);

   104 

   105                 final Graphics2D graphics = bi.createGraphics();

   106                 jep.paint(graphics);

   107                 graphics.dispose();

   108             } catch (final Exception e) {

   109                 throw new RuntimeException(e);

   110             }

   111         });

   112         return bi;

   113     }

   114 }