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/*
* Copyright 2002 Paulo Soares
*
*
* 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.
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) 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.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*
* 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.m_DOMAIN, new PdfArray(domain)); // ssteward
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.m_DOMAIN, new PdfArray(domain)); // ssteward
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.m_DOMAIN, new PdfArray(domain)); // ssteward
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.m_DOMAIN, new PdfArray(domain)); // ssteward
func.dictionary.put(PdfName.RANGE, new PdfArray(range));
return func;
}
}
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