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 * @test 26 * @bug 6574555 27 * @summary Test verifies that PNGImageWriter encodes the R, G, B 28 * values of bKGD chunk properly. 29 * @run main VerifyRGBValuesFromBKGDChunk 30 */ 31 32 import java.awt.image.BufferedImage; 33 import java.io.IOException; 34 import java.util.Iterator; 35 import javax.imageio.ImageTypeSpecifier; 36 import javax.imageio.ImageWriter; 37 import javax.imageio.ImageReader; 38 import javax.imageio.ImageIO; 39 import javax.imageio.ImageWriteParam; 40 import javax.imageio.metadata.IIOMetadata; 41 import javax.imageio.metadata.IIOMetadataNode; 42 import javax.imageio.IIOImage; 43 import javax.imageio.stream.ImageInputStream; 44 import javax.imageio.stream.ImageOutputStream; 45 import java.io.ByteArrayInputStream; 46 import java.io.ByteArrayOutputStream; 47 import java.io.InputStream; 48 49 public class VerifyRGBValuesFromBKGDChunk { 50 51 public static void main(String[] args) throws IOException { 52 int width = 1; 53 int height = 1; 54 BufferedImage img = new 55 BufferedImage(width, height, BufferedImage.TYPE_INT_BGR); 56 Iterator<ImageWriter> iterWriter = 57 ImageIO.getImageWritersBySuffix("png"); 58 ImageWriter writer = iterWriter.next(); 59 60 ImageWriteParam param = writer.getDefaultWriteParam(); 61 ImageTypeSpecifier specifier = 62 ImageTypeSpecifier. 63 createFromBufferedImageType(BufferedImage.TYPE_INT_BGR); 64 IIOMetadata encodeMetadata = 65 writer.getDefaultImageMetadata(specifier, param); 66 67 // Write png image with bKGD chunk 68 IIOMetadataNode bKGD_rgb = new IIOMetadataNode("bKGD_RGB"); 69 String red = "100"; 70 String green = "150"; 71 String blue = "200"; 72 bKGD_rgb.setAttribute("red", red); 73 bKGD_rgb.setAttribute("green", green); 74 bKGD_rgb.setAttribute("blue", blue); 75 76 IIOMetadataNode bKGD = new IIOMetadataNode("bKGD"); 77 bKGD.appendChild(bKGD_rgb); 78 IIOMetadataNode encodeRoot = 79 new IIOMetadataNode("javax_imageio_png_1.0"); 80 encodeRoot.appendChild(bKGD); 81 82 encodeMetadata.mergeTree("javax_imageio_png_1.0", encodeRoot); 83 84 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 85 ImageOutputStream ios = ImageIO.createImageOutputStream(baos); 86 writer.setOutput(ios); 87 88 writer.write(encodeMetadata, 89 new IIOImage(img, null, encodeMetadata), param); 90 writer.dispose(); 91 92 baos.flush(); 93 byte[] imageByteArray = baos.toByteArray(); 94 baos.close(); 95 96 // Get bKGD chunk from image and verify the values 97 InputStream input= new ByteArrayInputStream(imageByteArray); 98 ImageInputStream iis = ImageIO.createImageInputStream(input); 99 Iterator<ImageReader> iterReader = 100 ImageIO.getImageReadersBySuffix("png"); 101 ImageReader reader = iterReader.next(); 102 reader.setInput(iis, false, false); 103 104 IIOMetadata decodeMetadata = reader.getImageMetadata(0); 105 IIOMetadataNode decodeRoot = 106 (IIOMetadataNode) decodeMetadata. 107 getAsTree("javax_imageio_png_1.0"); 108 bKGD_rgb = (IIOMetadataNode) 109 decodeRoot.getElementsByTagName("bKGD_RGB").item(0); 110 111 if (!(red.equals(bKGD_rgb.getAttribute("red")) && 112 green.equals(bKGD_rgb.getAttribute("green")) && 113 blue.equals(bKGD_rgb.getAttribute("blue")))) { 114 throw new RuntimeException("bKGD RGB values are not stored" + 115 " properly"); 116 } 117 } 118 } 119