1 /*
   2  * Copyright (c) 2003, 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 /*
  25  * @test
  26  * @bug 4826548
  27  * @summary Tests for reading PNG images with 5,6,7 and 8 colors in palette
  28  */
  29 
  30 import java.awt.image.BufferedImage;
  31 import java.awt.image.IndexColorModel;
  32 import java.io.ByteArrayInputStream;
  33 import java.io.ByteArrayOutputStream;
  34 import java.io.IOException;
  35 
  36 import javax.imageio.ImageIO;
  37 
  38 public class ShortPaletteTest {
  39 
  40     public static void main(String[] args) {
  41 
  42         for (int numberColors = 2; numberColors <= 16; numberColors++) {
  43             try {
  44                 ByteArrayOutputStream baos = new ByteArrayOutputStream();
  45                 BufferedImage image = createImage(numberColors);
  46                 ImageIO.write(image, "png", baos);
  47                 baos.close();
  48                 System.out.println("Number of colors: " + numberColors);
  49                 byte[] buffer = baos.toByteArray();
  50                 ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
  51                 ImageIO.read(bais);
  52                 System.out.println("OK");
  53             } catch (ArrayIndexOutOfBoundsException e) {
  54                 e.printStackTrace();
  55                 throw new RuntimeException("Test failed.");
  56             } catch (IOException e) {
  57                 e.printStackTrace();
  58                 throw new RuntimeException("Unexpected exception was thrown."
  59                                            + " Test failed.");
  60             }
  61         }
  62     }
  63 
  64     private static IndexColorModel createColorModel(int numberColors) {
  65 
  66         byte[] colors = new byte[numberColors*3];
  67         int depth = 4;
  68         int startIndex = 0;
  69 
  70         return new IndexColorModel(depth,
  71                                    numberColors,
  72                                    colors,
  73                                    startIndex,
  74                                    false);
  75     }
  76 
  77     private static BufferedImage createImage(int numberColors) {
  78         return new BufferedImage(32,
  79                                  32,
  80                                  BufferedImage.TYPE_BYTE_BINARY,
  81                                  createColorModel(numberColors));
  82     }
  83 }