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 32import java.awt.image.BufferedImage; 33import java.io.ByteArrayOutputStream; 34import java.io.IOException; 35import java.util.Iterator; 36 37import javax.imageio.ImageIO; 38import javax.imageio.ImageTypeSpecifier; 39import javax.imageio.ImageWriter; 40import javax.imageio.stream.ImageOutputStream; 41 42public 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} 93