1 /*
2 * $Id: PdfContents.java 3634 2008-12-23 18:44:04Z xlv $
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
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 }