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Posted to fop-commits@xmlgraphics.apache.org by es...@locus.apache.org on 2000/05/23 11:20:09 UTC
cvs commit: xml-fop/src/org/apache/fop/pdf PDFBinaryStream.java
eschaeffer 00/05/23 02:20:09
Added: src/org/apache/fop/pdf PDFBinaryStream.java
Log:
PDFBinaryStream, represent a binary stream (utility to encode data using PDFFilter)
Revision Changes Path
1.1 xml-fop/src/org/apache/fop/pdf/PDFBinaryStream.java
Index: PDFBinaryStream.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Fop" and "Apache Software Foundation" must not be used to
endorse or promote products derived from this software without prior
written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
James Tauber <jt...@jtauber.com>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
//Author: Eric SCHAEFFER
//Description: Encode a binary stream using PDF filters
package org.apache.fop.pdf;
import org.apache.fop.datatypes.ColorSpace;
// Java
import java.util.Vector;
import java.lang.reflect.Array;
import java.io.*;
// compression
import java.util.zip.Deflater;
public class PDFBinaryStream {
private byte[] m_data = null;
private int m_dataSize = 0;
private Vector m_filters = null;
public PDFBinaryStream() {
m_filters = new Vector();
}
public void setData(byte[] data) {
this.m_data = data;
this.m_dataSize = java.lang.reflect.Array.getLength(this.m_data);
}
public void encode(PDFFilter filter) throws PDFFilterException {
if (this.m_data == null) throw new PDFFilterException("no data to encode");
int filterType = filter.getType();
if (filterType == PDFFilter.FLATE_DECODE) {
Deflater compressor = new Deflater();
// PDFFilter properties ?
compressor.setLevel(Deflater.DEFAULT_COMPRESSION);
compressor.setStrategy(Deflater.DEFAULT_STRATEGY);
compressor.setInput(m_data);
compressor.finish();
byte[] compMap = new byte[this.m_dataSize];
int compSize = compressor.deflate(compMap);
compressor.end();
this.m_data = new byte[compSize];
for (int i = 0; i < compSize; i++) {
this.m_data[i] = compMap[i];
}
this.m_dataSize = compSize;
// this.m_data = compMap;
// this.m_dataSize = java.lang.reflect.Array.getLength(this.m_data);
// } else if (filterType == PDFFilter.LZW_DECODE) {
} else if (filterType == PDFFilter.ASCII_HEX_DECODE) {
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < this.m_dataSize; i++) {
int val = (int) (this.m_data[i] & 0xFF);
if (val < 16) buffer.append("0");
buffer.append(Integer.toHexString(val));
//// TEST ////
/*
buffer.append(" ");
if (i % 75 == 0) buffer.append("\n");
*/
//// TEST ////
}
this.m_data = buffer.toString().getBytes();
this.m_dataSize = java.lang.reflect.Array.getLength(this.m_data);
} else {
throw new PDFFilterException("filter not supported");
}
this.m_filters.add(filter);
}
public String toPDF() {
StringBuffer buffer = new StringBuffer();
buffer.append("<<\n/Length ");
buffer.append(this.m_dataSize);
buffer.append("\n");
buffer.append("/Filter [");
for (int i = this.m_filters.size(); i > 0; i--) {
PDFFilter filter = (PDFFilter) this.m_filters.get(i - 1);
buffer.append(filter.toPDF());
if (i > 1) buffer.append(" ");
}
buffer.append("]\n");
buffer.append(">>\n");
buffer.append("stream\n");
buffer.append(this.m_data);
buffer.append("\nendstream\n");
return buffer.toString();
}
public String getPDFDictionary() {
StringBuffer buffer = new StringBuffer();
buffer.append("/Length ");
//// TEST ////
buffer.append(this.m_dataSize);
// buffer.append(this.m_dataSize + 1);
//// TEST ////
buffer.append("\n");
if (this.m_filters.size() > 0) {
buffer.append("/Filter [");
for (int i = this.m_filters.size(); i > 0; i--) {
PDFFilter filter = (PDFFilter) this.m_filters.get(i - 1);
buffer.append(filter.toPDF());
if (i > 1) buffer.append(" ");
}
buffer.append("]\n");
}
return buffer.toString();
}
public String getPDFStream() {
StringBuffer buffer = new StringBuffer();
buffer.append("stream\n");
buffer.append(this.m_data);
//// TEST ////
// buffer.append(">");
//// TEST ////
buffer.append("\nendstream\n");
return buffer.toString();
}
public int outputPDFStream(PrintWriter writer) throws IOException {
int length = 0;
String p;
p = new String("stream\n");
writer.write(p);
length += p.length();
/*
for (int i = 0; i < this.m_dataSize; i++) {
writer.write(Byte.toString(this.m_data[i]));
}
*/
writer.write(new String(this.m_data));
length += this.m_dataSize;
//// TEST ////
// writer.write(">");
// length += (new String(">")).length();
//// TEST ////
p = new String("\nendstream\n");
writer.write(p);
length += p.length();
return length;
}
}