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Version modificada de iText 2.1.7 con el paquete cambiado, adaptaciones menores para firma y dependencias actualizadas.
/*
* $Id: Jpeg2000.java 3583 2008-08-12 00:00:09Z xlv $
*
* Copyright 2007 by 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:
* http://www.lowagie.com/iText/
*/
package com.aowagie.text;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
/**
* An Jpeg2000 is the representation of a graphic element (JPEG)
* that has to be inserted into the document
*
* @see Element
* @see Image
*/
class Jpeg2000 extends Image {
// public static final membervariables
private static final int JP2_JP = 0x6a502020;
private static final int JP2_IHDR = 0x69686472;
private static final int JP2_FTYP = 0x66747970;
private static final int JP2_JP2H = 0x6a703268;
private static final int JP2_JP2C = 0x6a703263;
private InputStream inp;
private int boxLength;
private int boxType;
// Constructors
/**
* Constructs a Jpeg2000-object, using an url.
*
* @param url the URL where the image can be found
* @throws BadElementException
* @throws IOException
*/
Jpeg2000(final URL url) throws BadElementException, IOException {
super(url);
processParameters();
}
/**
* Constructs a Jpeg2000-object from memory.
*
* @param img the memory image
* @throws BadElementException
* @throws IOException
*/
Jpeg2000(final byte[] img) throws BadElementException, IOException {
super((URL)null);
this.rawData = img;
this.originalData = img;
processParameters();
}
private int cio_read(final int n) throws IOException {
int v = 0;
for (int i = n - 1; i >= 0; i--) {
v += this.inp.read() << (i << 3);
}
return v;
}
private void jp2_read_boxhdr() throws IOException {
this.boxLength = cio_read(4);
this.boxType = cio_read(4);
if (this.boxLength == 1) {
if (cio_read(4) != 0) {
throw new IOException("Cannot handle box sizes higher than 2^32");
}
this.boxLength = cio_read(4);
if (this.boxLength == 0) {
throw new IOException("Unsupported box size == 0");
}
}
else if (this.boxLength == 0) {
throw new IOException("Unsupported box size == 0");
}
}
/**
* This method checks if the image is a valid JPEG and processes some parameters.
* @throws IOException
*/
private void processParameters() throws IOException {
this.type = JPEG2000;
this.originalType = ORIGINAL_JPEG2000;
this.inp = null;
try {
String errorID;
if (this.rawData == null){
this.inp = this.url.openStream();
errorID = this.url.toString();
}
else{
this.inp = new java.io.ByteArrayInputStream(this.rawData);
errorID = "Byte array";
}
this.boxLength = cio_read(4);
if (this.boxLength == 0x0000000c) {
this.boxType = cio_read(4);
if (JP2_JP != this.boxType) {
throw new IOException("Expected JP Marker");
}
if (0x0d0a870a != cio_read(4)) {
throw new IOException("Error with JP Marker");
}
jp2_read_boxhdr();
if (JP2_FTYP != this.boxType) {
throw new IOException("Expected FTYP Marker");
}
Utilities.skip(this.inp, this.boxLength - 8);
jp2_read_boxhdr();
do {
if (JP2_JP2H != this.boxType) {
if (this.boxType == JP2_JP2C) {
throw new IOException("Expected JP2H Marker");
}
Utilities.skip(this.inp, this.boxLength - 8);
jp2_read_boxhdr();
}
} while(JP2_JP2H != this.boxType);
jp2_read_boxhdr();
if (JP2_IHDR != this.boxType) {
throw new IOException("Expected IHDR Marker");
}
this.scaledHeight = cio_read(4);
setTop(this.scaledHeight);
this.scaledWidth = cio_read(4);
setRight(this.scaledWidth);
this.bpc = -1;
}
else if (this.boxLength == 0xff4fff51) {
Utilities.skip(this.inp, 4);
final int x1 = cio_read(4);
final int y1 = cio_read(4);
final int x0 = cio_read(4);
final int y0 = cio_read(4);
Utilities.skip(this.inp, 16);
this.colorspace = cio_read(2);
this.bpc = 8;
this.scaledHeight = y1 - y0;
setTop(this.scaledHeight);
this.scaledWidth = x1 - x0;
setRight(this.scaledWidth);
}
else {
throw new IOException("Not a valid Jpeg2000 file");
}
}
finally {
if (this.inp != null) {
try{this.inp.close();}catch(final Exception e){}
this.inp = null;
}
}
this.plainWidth = getWidth();
this.plainHeight = getHeight();
}
}