1 /*

     2  * Copyright (c) 2002, 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 4450894

    27  * @summary Tests if the JPEGImageWriter allows images with > 8-bit samples to

    28  *          be written. Also tests the JPEGImageWriterSpi.canEncodeImage()

    29  *          mechanism for this same behavior.

    30  */

    31 

    32 import java.awt.image.BufferedImage;

    33 import java.io.ByteArrayOutputStream;

    34 import java.io.IOException;

    35 import java.util.Iterator;

    36 

    37 import javax.imageio.ImageIO;

    38 import javax.imageio.ImageTypeSpecifier;

    39 import javax.imageio.ImageWriter;

    40 import javax.imageio.stream.ImageOutputStream;

    41 

    42 public class UshortGrayTest {

    43 

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

    45         Iterator iter;

    46         BufferedImage bi = new BufferedImage(10, 10,

    47                                              BufferedImage.TYPE_USHORT_GRAY);

    48 

    49         // Part 1: ensure that JPEGImageWriter throws an exception if it

    50         // encounters an image with 16-bit samples

    51         ImageWriter writer = null;

    52         iter = ImageIO.getImageWritersByFormatName("jpeg");

    53         if (iter.hasNext()) {

    54             writer = (ImageWriter)iter.next();

    55         } else {

    56             throw new RuntimeException("No JPEG reader found");

    57         }

    58 

    59         ByteArrayOutputStream baos = new ByteArrayOutputStream();

    60         ImageOutputStream ios = null;

    61         boolean exceptionThrown = false;

    62 

    63         try {

    64             ios = ImageIO.createImageOutputStream(baos);

    65         } catch (IOException ioe) {

    66             throw new RuntimeException("Could not create ImageOutputStream");

    67         }

    68 

    69         try {

    70             writer.setOutput(ios);

    71             writer.write(bi);

    72         } catch (IOException ioe) {

    73             exceptionThrown = true;

    74         }

    75 

    76         if (!exceptionThrown) {

    77             throw new RuntimeException("JPEG writer should not be able to " +

    78                                        "write USHORT_GRAY images");

    79         }

    80 

    81         // Part 2: ensure that JPEGImageWriterSpi.canEncodeImage() returns

    82         // false for images with 16-bit samples

    83         ImageTypeSpecifier its =

    84             ImageTypeSpecifier.createFromRenderedImage(bi);

    85 

    86         iter = ImageIO.getImageWriters(its, "jpeg");

    87         if (iter.hasNext()) {

    88             throw new RuntimeException("JPEG writer should not be available" +

    89                                        " for USHORT_GRAY images");

    90         }

    91     }

    92 }