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+/*
+ * Copyright 2002 Paulo Soares
+ *
+ * The contents of this file are subject to the Mozilla Public License Version 1.1
+ * (the "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the License.
+ *
+ * The Original Code is 'iText, a free JAVA-PDF library'.
+ *
+ * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
+ * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
+ * All Rights Reserved.
+ * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
+ * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
+ *
+ * Contributor(s): all the names of the contributors are added in the source code
+ * where applicable.
+ *
+ * Alternatively, the contents of this file may be used under the terms of the
+ * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
+ * provisions of LGPL are applicable instead of those above. If you wish to
+ * allow use of your version of this file only under the terms of the LGPL
+ * License and not to allow others to use your version of this file under
+ * the MPL, indicate your decision by deleting the provisions above and
+ * replace them with the notice and other provisions required by the LGPL.
+ * If you do not delete the provisions above, a recipient may use your version
+ * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the MPL as stated above or under the terms of the GNU
+ * Library General Public License as published by the Free Software Foundation;
+ * either version 2 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
+ * details.
+ *
+ * If you didn't download this code from the following link, you should check if
+ * you aren't using an obsolete version:
+ * http://www.lowagie.com/iText/
+ */
+package com.lowagie.text.pdf;
+
+import com.lowagie.text.ExceptionConverter;
+import java.io.IOException;
+/** Implements PDF functions.
+ *
+ * @author Paulo Soares (psoares@consiste.pt)
+ */
+public class PdfFunction {
+
+ protected PdfWriter writer;
+
+ protected PdfIndirectReference reference;
+
+ protected PdfDictionary dictionary;
+
+ /** Creates new PdfFunction */
+ protected PdfFunction(PdfWriter writer) {
+ this.writer = writer;
+ }
+
+ PdfIndirectReference getReference() {
+ try {
+ if (reference == null) {
+ reference = writer.addToBody(dictionary).getIndirectReference();
+ }
+ }
+ catch (IOException ioe) {
+ throw new ExceptionConverter(ioe);
+ }
+ return reference;
+ }
+
+ public static PdfFunction type0(PdfWriter writer, float domain[], float range[], int size[],
+ int bitsPerSample, int order, float encode[], float decode[], byte stream[]) {
+ PdfFunction func = new PdfFunction(writer);
+ func.dictionary = new PdfStream(stream);
+ ((PdfStream)func.dictionary).flateCompress();
+ func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(0));
+ func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
+ func.dictionary.put(PdfName.RANGE, new PdfArray(range));
+ func.dictionary.put(PdfName.SIZE, new PdfArray(size));
+ func.dictionary.put(PdfName.BITSPERSAMPLE, new PdfNumber(bitsPerSample));
+ if (order != 1)
+ func.dictionary.put(PdfName.ORDER, new PdfNumber(order));
+ if (encode != null)
+ func.dictionary.put(PdfName.ENCODE, new PdfArray(encode));
+ if (decode != null)
+ func.dictionary.put(PdfName.DECODE, new PdfArray(decode));
+ return func;
+ }
+
+ public static PdfFunction type2(PdfWriter writer, float domain[], float range[], float c0[], float c1[], float n) {
+ PdfFunction func = new PdfFunction(writer);
+ func.dictionary = new PdfDictionary();
+ func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(2));
+ func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
+ if (range != null)
+ func.dictionary.put(PdfName.RANGE, new PdfArray(range));
+ if (c0 != null)
+ func.dictionary.put(PdfName.C0, new PdfArray(c0));
+ if (c1 != null)
+ func.dictionary.put(PdfName.C1, new PdfArray(c1));
+ func.dictionary.put(PdfName.N, new PdfNumber(n));
+ return func;
+ }
+
+ public static PdfFunction type3(PdfWriter writer, float domain[], float range[], PdfFunction functions[], float bounds[], float encode[]) {
+ PdfFunction func = new PdfFunction(writer);
+ func.dictionary = new PdfDictionary();
+ func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(3));
+ func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
+ if (range != null)
+ func.dictionary.put(PdfName.RANGE, new PdfArray(range));
+ PdfArray array = new PdfArray();
+ for (int k = 0; k < functions.length; ++k)
+ array.add(functions[k].getReference());
+ func.dictionary.put(PdfName.FUNCTIONS, array);
+ func.dictionary.put(PdfName.BOUNDS, new PdfArray(bounds));
+ func.dictionary.put(PdfName.ENCODE, new PdfArray(encode));
+ return func;
+ }
+
+ public static PdfFunction type4(PdfWriter writer, float domain[], float range[], String postscript) {
+ byte b[] = new byte[postscript.length()];
+ for (int k = 0; k < b.length; ++k)
+ b[k] = (byte)postscript.charAt(k);
+ PdfFunction func = new PdfFunction(writer);
+ func.dictionary = new PdfStream(b);
+ ((PdfStream)func.dictionary).flateCompress();
+ func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(4));
+ func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
+ func.dictionary.put(PdfName.RANGE, new PdfArray(range));
+ return func;
+ }
+}