1 /* 2 * $Id$ 3 * 4 * Copyright 1999, 2000, 2001, 2002 Bruno Lowagie 5 * 6 * The contents of this file are subject to the Mozilla Public License Version 1.1 7 * (the "License"); you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at http://www.mozilla.org/MPL/ 9 * 10 * Software distributed under the License is distributed on an "AS IS" basis, 11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 12 * for the specific language governing rights and limitations under the License. 13 * 14 * The Original Code is 'iText, a free JAVA-PDF library'. 15 * 16 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by 17 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. 18 * All Rights Reserved. 19 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer 20 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. 21 * 22 * Contributor(s): all the names of the contributors are added in the source code 23 * where applicable. 24 * 25 * Alternatively, the contents of this file may be used under the terms of the 26 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the 27 * provisions of LGPL are applicable instead of those above. If you wish to 28 * allow use of your version of this file only under the terms of the LGPL 29 * License and not to allow others to use your version of this file under 30 * the MPL, indicate your decision by deleting the provisions above and 31 * replace them with the notice and other provisions required by the LGPL. 32 * If you do not delete the provisions above, a recipient may use your version 33 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. 34 * 35 * This library is free software; you can redistribute it and/or modify it 36 * under the terms of the MPL as stated above or under the terms of the GNU 37 * Library General Public License as published by the Free Software Foundation; 38 * either version 2 of the License, or any later version. 39 * 40 * This library is distributed in the hope that it will be useful, but WITHOUT 41 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 42 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more 43 * details. 44 * 45 * If you didn't download this code from the following link, you should check if 46 * you aren't using an obsolete version: 47 * http://www.lowagie.com/iText/ 48 */ 49 50 package com.lowagie.text.pdf; 51 52 import java.io.ByteArrayOutputStream; 53 import java.io.OutputStream; 54 import java.util.zip.Deflater; 55 import java.util.zip.DeflaterOutputStream; 56 57 import com.lowagie.text.DocWriter; 58 import com.lowagie.text.Document; 59 import com.lowagie.text.Rectangle; 60 61 /** 62 * <CODE>PdfContents</CODE> is a <CODE>PdfStream</CODE> containing the contents (text + graphics) of a <CODE>PdfPage</CODE>. 63 */ 64 65 class PdfContents extends PdfStream { 66 67 static final byte SAVESTATE[] = DocWriter.getISOBytes("q\n"); 68 static final byte RESTORESTATE[] = DocWriter.getISOBytes("Q\n"); 69 static final byte ROTATE90[] = DocWriter.getISOBytes("0 1 -1 0 "); 70 static final byte ROTATE180[] = DocWriter.getISOBytes("-1 0 0 -1 "); 71 static final byte ROTATE270[] = DocWriter.getISOBytes("0 -1 1 0 "); 72 static final byte ROTATEFINAL[] = DocWriter.getISOBytes(" cm\n"); 73 // constructor 74 75 /** 76 * Constructs a <CODE>PdfContents</CODE>-object, containing text and general graphics. 77 * 78 * @param under the direct content that is under all others 79 * @param content the graphics in a page 80 * @param text the text in a page 81 * @param secondContent the direct content that is over all others 82 * @throws BadPdfFormatException on error 83 */ 84 PdfContents(PdfContentByte under, PdfContentByte content, PdfContentByte text, PdfContentByte secondContent, Rectangle page)85 PdfContents(PdfContentByte under, PdfContentByte content, PdfContentByte text, PdfContentByte secondContent, Rectangle page) throws BadPdfFormatException { 86 super(); 87 try { 88 OutputStream out = null; 89 Deflater deflater = null; 90 streamBytes = new ByteArrayOutputStream(); 91 if (Document.compress) 92 { 93 compressed = true; 94 compressionLevel = text.getPdfWriter().getCompressionLevel(); 95 deflater = new Deflater(compressionLevel); 96 out = new DeflaterOutputStream(streamBytes, deflater); 97 } 98 else 99 out = streamBytes; 100 int rotation = page.getRotation(); 101 switch (rotation) { 102 case 90: 103 out.write(ROTATE90); 104 out.write(DocWriter.getISOBytes(ByteBuffer.formatDouble(page.getTop()))); 105 out.write(' '); 106 out.write('0'); 107 out.write(ROTATEFINAL); 108 break; 109 case 180: 110 out.write(ROTATE180); 111 out.write(DocWriter.getISOBytes(ByteBuffer.formatDouble(page.getRight()))); 112 out.write(' '); 113 out.write(DocWriter.getISOBytes(ByteBuffer.formatDouble(page.getTop()))); 114 out.write(ROTATEFINAL); 115 break; 116 case 270: 117 out.write(ROTATE270); 118 out.write('0'); 119 out.write(' '); 120 out.write(DocWriter.getISOBytes(ByteBuffer.formatDouble(page.getRight()))); 121 out.write(ROTATEFINAL); 122 break; 123 } 124 if (under.size() > 0) { 125 out.write(SAVESTATE); 126 under.getInternalBuffer().writeTo(out); 127 out.write(RESTORESTATE); 128 } 129 if (content.size() > 0) { 130 out.write(SAVESTATE); 131 content.getInternalBuffer().writeTo(out); 132 out.write(RESTORESTATE); 133 } 134 if (text != null) { 135 out.write(SAVESTATE); 136 text.getInternalBuffer().writeTo(out); 137 out.write(RESTORESTATE); 138 } 139 if (secondContent.size() > 0) { 140 secondContent.getInternalBuffer().writeTo(out); 141 } 142 out.close(); 143 if (deflater != null) { 144 deflater.end(); 145 } 146 } 147 catch (Exception e) { 148 throw new BadPdfFormatException(e.getMessage()); 149 } 150 put(PdfName.LENGTH, new PdfNumber(streamBytes.size())); 151 if (compressed) 152 put(PdfName.FILTER, PdfName.FLATEDECODE); 153 } 154 }