com.lowagie.text.pdf.PdfContents Maven / Gradle / Ivy
/*
* $Id: PdfContents.java 3634 2008-12-23 18:44:04Z xlv $
*
* Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
*
* 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 java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import com.lowagie.text.DocWriter;
import com.lowagie.text.Document;
import com.lowagie.text.Rectangle;
/**
* PdfContents is a PdfStream containing the contents (text + graphics) of a PdfPage.
*/
class PdfContents extends PdfStream {
static final byte[] SAVESTATE = DocWriter.getISOBytes("q\n");
static final byte[] RESTORESTATE = DocWriter.getISOBytes("Q\n");
static final byte[] ROTATE90 = DocWriter.getISOBytes("0 1 -1 0 ");
static final byte[] ROTATE180 = DocWriter.getISOBytes("-1 0 0 -1 ");
static final byte[] ROTATE270 = DocWriter.getISOBytes("0 -1 1 0 ");
static final byte[] ROTATEFINAL = DocWriter.getISOBytes(" cm\n");
// constructor
/**
* Constructs a PdfContents-object, containing text and general graphics.
*
* @param under the direct content that is under all others
* @param content the graphics in a page
* @param text the text in a page
* @param secondContent the direct content that is over all others
* @throws BadPdfFormatException on error
*/
PdfContents(PdfContentByte under, PdfContentByte content, PdfContentByte text, PdfContentByte secondContent, Rectangle page) throws BadPdfFormatException {
super();
try {
OutputStream out = null;
Deflater deflater = null;
streamBytes = new ByteArrayOutputStream();
if (Document.compress)
{
compressed = true;
compressionLevel = text.getPdfWriter().getCompressionLevel();
deflater = new Deflater(compressionLevel);
out = new DeflaterOutputStream(streamBytes, deflater);
}
else
out = streamBytes;
int rotation = page.getRotation();
switch (rotation) {
case 90:
out.write(ROTATE90);
out.write(DocWriter.getISOBytes(ByteBuffer.formatDouble(page.getTop())));
out.write(' ');
out.write('0');
out.write(ROTATEFINAL);
break;
case 180:
out.write(ROTATE180);
out.write(DocWriter.getISOBytes(ByteBuffer.formatDouble(page.getRight())));
out.write(' ');
out.write(DocWriter.getISOBytes(ByteBuffer.formatDouble(page.getTop())));
out.write(ROTATEFINAL);
break;
case 270:
out.write(ROTATE270);
out.write('0');
out.write(' ');
out.write(DocWriter.getISOBytes(ByteBuffer.formatDouble(page.getRight())));
out.write(ROTATEFINAL);
break;
}
if (under.size() > 0) {
out.write(SAVESTATE);
under.getInternalBuffer().writeTo(out);
out.write(RESTORESTATE);
}
if (content.size() > 0) {
out.write(SAVESTATE);
content.getInternalBuffer().writeTo(out);
out.write(RESTORESTATE);
}
if (text != null) {
out.write(SAVESTATE);
text.getInternalBuffer().writeTo(out);
out.write(RESTORESTATE);
}
if (secondContent.size() > 0) {
secondContent.getInternalBuffer().writeTo(out);
}
out.close();
if (deflater != null) {
deflater.end();
}
}
catch (Exception e) {
throw new BadPdfFormatException(e.getMessage());
}
put(PdfName.LENGTH, new PdfNumber(streamBytes.size()));
if (compressed)
put(PdfName.FILTER, PdfName.FLATEDECODE);
}
}