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 import java.awt.BasicStroke;

    26 import java.awt.Color;

    27 import java.awt.Graphics2D;

    28 import java.awt.RenderingHints;

    29 import java.awt.image.BufferedImage;

    30 import java.awt.image.Raster;

    31 import java.io.File;

    32 import java.io.IOException;

    33 import java.util.Arrays;

    34 import javax.imageio.ImageIO;

    35 

    36 /**

    37  * Simple Dashed Rect rendering test

    38  *

    39  * @test

    40  * @summary verify that dashed rectangle is properly rasterized

    41  * @bug 8202580

    42  */

    43 public class DashedRectTest {

    44 

    45     static final boolean SAVE_IMAGE = false;

    46 

    47     private final static int N = 10;

    48 

    49     final static float DASH_LEN = 3.0f;

    50     final static float DASH_PH = 5000f;

    51 

    52     final static int MAX = 100;

    53 

    54     public static void main(String[] args) {

    55 

    56         final int size = 200;

    57 

    58         // First display which renderer is tested:

    59         // JDK9 only:

    60         System.setProperty("sun.java2d.renderer.verbose", "true");

    61 

    62         System.out.println("DashedRectClipTest: size = " + size);

    63 

    64         final BufferedImage image = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);

    65 

    66         final Graphics2D g2d = (Graphics2D) image.getGraphics();

    67         try {

    68             g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);

    69             g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);

    70             g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);

    71 

    72             g2d.setClip(0, 0, size, size);

    73 

    74             g2d.setBackground(Color.WHITE);

    75             g2d.clearRect(0, 0, size, size);

    76 

    77             // Corrupt Marlin Dasher.dash cached array:

    78             g2d.setColor(Color.RED);

    79             g2d.setStroke(createBadStroke());

    80             g2d.drawRect(20, 20, 50, 50);

    81 

    82             g2d.setStroke(createStroke());

    83 

    84             g2d.setColor(Color.BLUE);

    85 

    86             for (int i = 0; i < N; i++) {

    87                 final long start = System.nanoTime();

    88 

    89                 g2d.drawRect(5, 5, MAX, MAX);

    90 

    91                 final long time = System.nanoTime() - start;

    92 

    93                 System.out.println("paint: duration= " + (1e-6 * time) + " ms.");

    94             }

    95 

    96             if (SAVE_IMAGE) {

    97                 try {

    98                     final File file = new File("DashedRectClipTest-MAX-" + MAX + "-dashed.png");

    99 

   100                     System.out.println("Writing file: " + file.getAbsolutePath());

   101                     ImageIO.write(image, "PNG", file);

   102                 } catch (IOException ex) {

   103                     ex.printStackTrace();

   104                 }

   105             }

   106 

   107             // Check image on few pixels:

   108             final Raster raster = image.getData();

   109 

   110             // 10, 5 = blue

   111             checkPixel(raster, 10, 5, Color.BLUE.getRGB());

   112 

   113         } finally {

   114             g2d.dispose();

   115         }

   116     }

   117 

   118     private static void checkPixel(final Raster raster,

   119                                    final int x, final int y,

   120                                    final int expected) {

   121 

   122         final int[] rgb = (int[]) raster.getDataElements(x, y, null);

   123 

   124         if (rgb[0] != expected) {

   125             throw new IllegalStateException("bad pixel at (" + x + ", " + y

   126                 + ") = " + rgb[0] + " expected: " + expected);

   127         }

   128     }

   129 

   130     private static BasicStroke createStroke() {

   131         return new BasicStroke(2f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 10.0f,

   132                 new float[]{DASH_LEN}, DASH_PH) {

   133 

   134         };

   135     }

   136 

   137     private static BasicStroke createBadStroke() {

   138         final float[] dash = new float[100];

   139         Arrays.fill(dash, 19.333f);

   140 

   141         return new BasicStroke(2f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 10.0f, dash, DASH_PH);

   142     }

   143 

   144 }