/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2017 iText Group NV
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: sales@itextpdf.com
*/
package com.itextpdf.text.pdf;
import java.io.IOException;
import com.itextpdf.text.ExceptionConverter;
/** Implements PDF functions.
*
* @author Paulo Soares
*/
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(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 (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(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;
}
}