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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:
* https://github.com/LibrePDF/OpenPDF
*/
package com.lowagie.text.pdf;
import com.lowagie.text.ExceptionConverter;
import java.io.IOException;
/** Implements PDF functions.
*
* @author Paulo Soares ([email protected])
*/
public class PdfFunction {
protected PdfWriter writer;
protected PdfIndirectReference reference;
protected PdfDictionary dictionary;
/** Creates new PdfFunction
* @param writer the PdfWriter to associate to the 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(writer.getCompressionLevel());
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 (PdfFunction function : functions) array.add(function.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(writer.getCompressionLevel());
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;
}
}
