001: /*
002: * Copyright 2002 Paulo Soares
003: *
004: * The contents of this file are subject to the Mozilla Public License Version 1.1
005: * (the "License"); you may not use this file except in compliance with the License.
006: * You may obtain a copy of the License at http://www.mozilla.org/MPL/
007: *
008: * Software distributed under the License is distributed on an "AS IS" basis,
009: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
010: * for the specific language governing rights and limitations under the License.
011: *
012: * The Original Code is 'iText, a free JAVA-PDF library'.
013: *
014: * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
015: * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
016: * All Rights Reserved.
017: * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
018: * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
019: *
020: * Contributor(s): all the names of the contributors are added in the source code
021: * where applicable.
022: *
023: * Alternatively, the contents of this file may be used under the terms of the
024: * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
025: * provisions of LGPL are applicable instead of those above. If you wish to
026: * allow use of your version of this file only under the terms of the LGPL
027: * License and not to allow others to use your version of this file under
028: * the MPL, indicate your decision by deleting the provisions above and
029: * replace them with the notice and other provisions required by the LGPL.
030: * If you do not delete the provisions above, a recipient may use your version
031: * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
032: *
033: * This library is free software; you can redistribute it and/or modify it
034: * under the terms of the MPL as stated above or under the terms of the GNU
035: * Library General Public License as published by the Free Software Foundation;
036: * either version 2 of the License, or any later version.
037: *
038: * This library is distributed in the hope that it will be useful, but WITHOUT
039: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
040: * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
041: * details.
042: *
043: * If you didn't download this code from the following link, you should check if
044: * you aren't using an obsolete version:
045: * http://www.lowagie.com/iText/
046: */
047: package com.lowagie.text.pdf;
048:
049: import java.io.IOException;
050:
051: import com.lowagie.text.ExceptionConverter;
052:
053: /** Implements PDF functions.
054: *
055: * @author Paulo Soares (psoares@consiste.pt)
056: */
057: public class PdfFunction {
058:
059: protected PdfWriter writer;
060:
061: protected PdfIndirectReference reference;
062:
063: protected PdfDictionary dictionary;
064:
065: /** Creates new PdfFunction */
066: protected PdfFunction(PdfWriter writer) {
067: this .writer = writer;
068: }
069:
070: PdfIndirectReference getReference() {
071: try {
072: if (reference == null) {
073: reference = writer.addToBody(dictionary)
074: .getIndirectReference();
075: }
076: } catch (IOException ioe) {
077: throw new ExceptionConverter(ioe);
078: }
079: return reference;
080: }
081:
082: public static PdfFunction type0(PdfWriter writer, float domain[],
083: float range[], int size[], int bitsPerSample, int order,
084: float encode[], float decode[], byte stream[]) {
085: PdfFunction func = new PdfFunction(writer);
086: func.dictionary = new PdfStream(stream);
087: ((PdfStream) func.dictionary).flateCompress();
088: func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(0));
089: func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
090: func.dictionary.put(PdfName.RANGE, new PdfArray(range));
091: func.dictionary.put(PdfName.SIZE, new PdfArray(size));
092: func.dictionary.put(PdfName.BITSPERSAMPLE, new PdfNumber(
093: bitsPerSample));
094: if (order != 1)
095: func.dictionary.put(PdfName.ORDER, new PdfNumber(order));
096: if (encode != null)
097: func.dictionary.put(PdfName.ENCODE, new PdfArray(encode));
098: if (decode != null)
099: func.dictionary.put(PdfName.DECODE, new PdfArray(decode));
100: return func;
101: }
102:
103: public static PdfFunction type2(PdfWriter writer, float domain[],
104: float range[], float c0[], float c1[], float n) {
105: PdfFunction func = new PdfFunction(writer);
106: func.dictionary = new PdfDictionary();
107: func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(2));
108: func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
109: if (range != null)
110: func.dictionary.put(PdfName.RANGE, new PdfArray(range));
111: if (c0 != null)
112: func.dictionary.put(PdfName.C0, new PdfArray(c0));
113: if (c1 != null)
114: func.dictionary.put(PdfName.C1, new PdfArray(c1));
115: func.dictionary.put(PdfName.N, new PdfNumber(n));
116: return func;
117: }
118:
119: public static PdfFunction type3(PdfWriter writer, float domain[],
120: float range[], PdfFunction functions[], float bounds[],
121: float encode[]) {
122: PdfFunction func = new PdfFunction(writer);
123: func.dictionary = new PdfDictionary();
124: func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(3));
125: func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
126: if (range != null)
127: func.dictionary.put(PdfName.RANGE, new PdfArray(range));
128: PdfArray array = new PdfArray();
129: for (int k = 0; k < functions.length; ++k)
130: array.add(functions[k].getReference());
131: func.dictionary.put(PdfName.FUNCTIONS, array);
132: func.dictionary.put(PdfName.BOUNDS, new PdfArray(bounds));
133: func.dictionary.put(PdfName.ENCODE, new PdfArray(encode));
134: return func;
135: }
136:
137: public static PdfFunction type4(PdfWriter writer, float domain[],
138: float range[], String postscript) {
139: byte b[] = new byte[postscript.length()];
140: for (int k = 0; k < b.length; ++k)
141: b[k] = (byte) postscript.charAt(k);
142: PdfFunction func = new PdfFunction(writer);
143: func.dictionary = new PdfStream(b);
144: ((PdfStream) func.dictionary).flateCompress();
145: func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(4));
146: func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
147: func.dictionary.put(PdfName.RANGE, new PdfArray(range));
148: return func;
149: }
150: }
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