001/* 002 * $Id: ImgJBIG2.java 4784 2011-03-15 08:33:00Z blowagie $ 003 * 004 * This file is part of the iText (R) project. 005 * Copyright (c) 1998-2011 1T3XT BVBA 006 * Authors: Bruno Lowagie, Paulo Soares, et al. 007 * 008 * This program is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Affero General Public License version 3 010 * as published by the Free Software Foundation with the addition of the 011 * following permission added to Section 15 as permitted in Section 7(a): 012 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT, 013 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS. 014 * 015 * This program is distributed in the hope that it will be useful, but 016 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 017 * or FITNESS FOR A PARTICULAR PURPOSE. 018 * See the GNU Affero General Public License for more details. 019 * You should have received a copy of the GNU Affero General Public License 020 * along with this program; if not, see http://www.gnu.org/licenses or write to 021 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 022 * Boston, MA, 02110-1301 USA, or download the license from the following URL: 023 * http://itextpdf.com/terms-of-use/ 024 * 025 * The interactive user interfaces in modified source and object code versions 026 * of this program must display Appropriate Legal Notices, as required under 027 * Section 5 of the GNU Affero General Public License. 028 * 029 * In accordance with Section 7(b) of the GNU Affero General Public License, 030 * a covered work must retain the producer line in every PDF that is created 031 * or manipulated using iText. 032 * 033 * You can be released from the requirements of the license by purchasing 034 * a commercial license. Buying such a license is mandatory as soon as you 035 * develop commercial activities involving the iText software without 036 * disclosing the source code of your own applications. 037 * These activities include: offering paid services to customers as an ASP, 038 * serving PDFs on the fly in a web application, shipping iText with a closed 039 * source product. 040 * 041 * For more information, please contact iText Software Corp. at this 042 * address: sales@itextpdf.com 043 */ 044package com.itextpdf.text; 045 046import java.net.URL; 047import java.security.MessageDigest; 048 049/** 050 * Support for JBIG2 images. 051 * @since 2.1.5 052 */ 053public class ImgJBIG2 extends Image { 054 055 /** JBIG2 globals */ 056 private byte[] global; 057 /** A unique hash */ 058 private byte[] globalHash; 059 060 /** 061 * Copy contstructor. 062 * @param image another Image 063 */ 064 ImgJBIG2(Image image) { 065 super(image); 066 } 067 068 /** 069 * Empty constructor. 070 */ 071 public ImgJBIG2() { 072 super((Image) null); 073 } 074 075 /** 076 * Actual constructor for ImgJBIG2 images. 077 * @param width the width of the image 078 * @param height the height of the image 079 * @param data the raw image data 080 * @param globals JBIG2 globals 081 */ 082 public ImgJBIG2(int width, int height, byte[] data, byte[] globals) { 083 super((URL) null); 084 type = JBIG2; 085 originalType = ORIGINAL_JBIG2; 086 scaledHeight = height; 087 setTop(scaledHeight); 088 scaledWidth = width; 089 setRight(scaledWidth); 090 bpc = 1; 091 colorspace = 1; 092 rawData = data; 093 plainWidth = getWidth(); 094 plainHeight = getHeight(); 095 if ( globals != null ) { 096 this.global = globals; 097 MessageDigest md; 098 try { 099 md = MessageDigest.getInstance("MD5"); 100 md.update(this.global); 101 this.globalHash = md.digest(); 102 } catch (Exception e) { 103 //ignore 104 } 105 106 } 107 } 108 109 /** 110 * Getter for the JBIG2 global data. 111 * @return an array of bytes 112 */ 113 public byte[] getGlobalBytes() { 114 return this.global; 115 } 116 117 /** 118 * Getter for the unique hash. 119 * @return an array of bytes 120 */ 121 public byte[] getGlobalHash() { 122 return this.globalHash; 123 } 124 125}