001: /*
002: * $Id: PdfContents.java 2742 2007-05-08 13:04:56Z blowagie $
003: * $Name$
004: *
005: * Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
006: *
007: * The contents of this file are subject to the Mozilla Public License Version 1.1
008: * (the "License"); you may not use this file except in compliance with the License.
009: * You may obtain a copy of the License at http://www.mozilla.org/MPL/
010: *
011: * Software distributed under the License is distributed on an "AS IS" basis,
012: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
013: * for the specific language governing rights and limitations under the License.
014: *
015: * The Original Code is 'iText, a free JAVA-PDF library'.
016: *
017: * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
018: * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
019: * All Rights Reserved.
020: * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
021: * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
022: *
023: * Contributor(s): all the names of the contributors are added in the source code
024: * where applicable.
025: *
026: * Alternatively, the contents of this file may be used under the terms of the
027: * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
028: * provisions of LGPL are applicable instead of those above. If you wish to
029: * allow use of your version of this file only under the terms of the LGPL
030: * License and not to allow others to use your version of this file under
031: * the MPL, indicate your decision by deleting the provisions above and
032: * replace them with the notice and other provisions required by the LGPL.
033: * If you do not delete the provisions above, a recipient may use your version
034: * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
035: *
036: * This library is free software; you can redistribute it and/or modify it
037: * under the terms of the MPL as stated above or under the terms of the GNU
038: * Library General Public License as published by the Free Software Foundation;
039: * either version 2 of the License, or any later version.
040: *
041: * This library is distributed in the hope that it will be useful, but WITHOUT
042: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
043: * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
044: * details.
045: *
046: * If you didn't download this code from the following link, you should check if
047: * you aren't using an obsolete version:
048: * http://www.lowagie.com/iText/
049: */
050:
051: package com.lowagie.text.pdf;
052:
053: import java.io.ByteArrayOutputStream;
054: import java.io.OutputStream;
055: import java.util.zip.DeflaterOutputStream;
056:
057: import com.lowagie.text.DocWriter;
058: import com.lowagie.text.Document;
059: import com.lowagie.text.Rectangle;
060:
061: /**
062: * <CODE>PdfContents</CODE> is a <CODE>PdfStream</CODE> containing the contents (text + graphics) of a <CODE>PdfPage</CODE>.
063: */
064:
065: class PdfContents extends PdfStream {
066:
067: static final byte SAVESTATE[] = DocWriter.getISOBytes("q\n");
068: static final byte RESTORESTATE[] = DocWriter.getISOBytes("Q\n");
069: static final byte ROTATE90[] = DocWriter.getISOBytes("0 1 -1 0 ");
070: static final byte ROTATE180[] = DocWriter.getISOBytes("-1 0 0 -1 ");
071: static final byte ROTATE270[] = DocWriter.getISOBytes("0 -1 1 0 ");
072: static final byte ROTATEFINAL[] = DocWriter.getISOBytes(" cm\n");
073:
074: // constructor
075:
076: /**
077: * Constructs a <CODE>PdfContents</CODE>-object, containing text and general graphics.
078: *
079: * @param under the direct content that is under all others
080: * @param content the graphics in a page
081: * @param text the text in a page
082: * @param secondContent the direct content that is over all others
083: * @throws BadPdfFormatException on error
084: */
085:
086: PdfContents(PdfContentByte under, PdfContentByte content,
087: PdfContentByte text, PdfContentByte secondContent,
088: Rectangle page) throws BadPdfFormatException {
089: super ();
090: try {
091: OutputStream out = null;
092: streamBytes = new ByteArrayOutputStream();
093: if (Document.compress) {
094: compressed = true;
095: out = new DeflaterOutputStream(streamBytes);
096: } else
097: out = streamBytes;
098: int rotation = page.getRotation();
099: switch (rotation) {
100: case 90:
101: out.write(ROTATE90);
102: out.write(DocWriter.getISOBytes(ByteBuffer
103: .formatDouble(page.getTop())));
104: out.write(' ');
105: out.write('0');
106: out.write(ROTATEFINAL);
107: break;
108: case 180:
109: out.write(ROTATE180);
110: out.write(DocWriter.getISOBytes(ByteBuffer
111: .formatDouble(page.getRight())));
112: out.write(' ');
113: out.write(DocWriter.getISOBytes(ByteBuffer
114: .formatDouble(page.getTop())));
115: out.write(ROTATEFINAL);
116: break;
117: case 270:
118: out.write(ROTATE270);
119: out.write('0');
120: out.write(' ');
121: out.write(DocWriter.getISOBytes(ByteBuffer
122: .formatDouble(page.getRight())));
123: out.write(ROTATEFINAL);
124: break;
125: }
126: if (under.size() > 0) {
127: out.write(SAVESTATE);
128: under.getInternalBuffer().writeTo(out);
129: out.write(RESTORESTATE);
130: }
131: if (content.size() > 0) {
132: out.write(SAVESTATE);
133: content.getInternalBuffer().writeTo(out);
134: out.write(RESTORESTATE);
135: }
136: if (text != null) {
137: out.write(SAVESTATE);
138: text.getInternalBuffer().writeTo(out);
139: out.write(RESTORESTATE);
140: }
141: if (secondContent.size() > 0) {
142: secondContent.getInternalBuffer().writeTo(out);
143: }
144: out.close();
145: } catch (Exception e) {
146: throw new BadPdfFormatException(e.getMessage());
147: }
148: put(PdfName.LENGTH, new PdfNumber(streamBytes.size()));
149: if (compressed)
150: put(PdfName.FILTER, PdfName.FLATEDECODE);
151: }
152: }
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