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iText, a free Java-PDF library
/*
* $Id: Jpeg2000.java 4065 2009-09-16 23:09:11Z psoares33 $
*
* 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.lowagie.text;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import com.lowagie.text.error_messages.MessageLocalization;
/**
* An Jpeg2000 is the representation of a graphic element (JPEG)
* that has to be inserted into the document
*
* @see Element
* @see Image
*/
public class Jpeg2000 extends Image {
// public static final membervariables
public static final int JP2_JP = 0x6a502020;
public static final int JP2_IHDR = 0x69686472;
public static final int JPIP_JPIP = 0x6a706970;
public static final int JP2_FTYP = 0x66747970;
public static final int JP2_JP2H = 0x6a703268;
public static final int JP2_COLR = 0x636f6c72;
public static final int JP2_JP2C = 0x6a703263;
public static final int JP2_URL = 0x75726c20;
public static final int JP2_DBTL = 0x6474626c;
public static final int JP2_BPCC = 0x62706363;
public static final int JP2_JP2 = 0x6a703220;
InputStream inp;
int boxLength;
int boxType;
// Constructors
Jpeg2000(Image image) {
super(image);
}
/**
* Constructs a Jpeg2000-object, using an url.
*
* @param url the URL where the image can be found
* @throws BadElementException
* @throws IOException
*/
public Jpeg2000(URL url) throws BadElementException, IOException {
super(url);
processParameters();
}
/**
* Constructs a Jpeg2000-object from memory.
*
* @param img the memory image
* @throws BadElementException
* @throws IOException
*/
public Jpeg2000(byte[] img) throws BadElementException, IOException {
super((URL)null);
rawData = img;
originalData = img;
processParameters();
}
/**
* Constructs a Jpeg2000-object from memory.
*
* @param img the memory image.
* @param width the width you want the image to have
* @param height the height you want the image to have
* @throws BadElementException
* @throws IOException
*/
public Jpeg2000(byte[] img, float width, float height) throws BadElementException, IOException {
this(img);
scaledWidth = width;
scaledHeight = height;
}
private int cio_read(int n) throws IOException {
int v = 0;
for (int i = n - 1; i >= 0; i--) {
v += inp.read() << (i << 3);
}
return v;
}
public void jp2_read_boxhdr() throws IOException {
boxLength = cio_read(4);
boxType = cio_read(4);
if (boxLength == 1) {
if (cio_read(4) != 0) {
throw new IOException(MessageLocalization.getComposedMessage("cannot.handle.box.sizes.higher.than.2.32"));
}
boxLength = cio_read(4);
if (boxLength == 0)
throw new IOException(MessageLocalization.getComposedMessage("unsupported.box.size.eq.eq.0"));
}
else if (boxLength == 0) {
throw new IOException(MessageLocalization.getComposedMessage("unsupported.box.size.eq.eq.0"));
}
}
/**
* This method checks if the image is a valid JPEG and processes some parameters.
* @throws IOException
*/
private void processParameters() throws IOException {
type = JPEG2000;
originalType = ORIGINAL_JPEG2000;
inp = null;
try {
String errorID;
if (rawData == null){
inp = url.openStream();
errorID = url.toString();
}
else{
inp = new java.io.ByteArrayInputStream(rawData);
errorID = "Byte array";
}
boxLength = cio_read(4);
if (boxLength == 0x0000000c) {
boxType = cio_read(4);
if (JP2_JP != boxType) {
throw new IOException(MessageLocalization.getComposedMessage("expected.jp.marker"));
}
if (0x0d0a870a != cio_read(4)) {
throw new IOException(MessageLocalization.getComposedMessage("error.with.jp.marker"));
}
jp2_read_boxhdr();
if (JP2_FTYP != boxType) {
throw new IOException(MessageLocalization.getComposedMessage("expected.ftyp.marker"));
}
Utilities.skip(inp, boxLength - 8);
jp2_read_boxhdr();
do {
if (JP2_JP2H != boxType) {
if (boxType == JP2_JP2C) {
throw new IOException(MessageLocalization.getComposedMessage("expected.jp2h.marker"));
}
Utilities.skip(inp, boxLength - 8);
jp2_read_boxhdr();
}
} while(JP2_JP2H != boxType);
jp2_read_boxhdr();
if (JP2_IHDR != boxType) {
throw new IOException(MessageLocalization.getComposedMessage("expected.ihdr.marker"));
}
scaledHeight = cio_read(4);
setTop(scaledHeight);
scaledWidth = cio_read(4);
setRight(scaledWidth);
bpc = -1;
}
else if (boxLength == 0xff4fff51) {
Utilities.skip(inp, 4);
int x1 = cio_read(4);
int y1 = cio_read(4);
int x0 = cio_read(4);
int y0 = cio_read(4);
Utilities.skip(inp, 16);
colorspace = cio_read(2);
bpc = 8;
scaledHeight = y1 - y0;
setTop(scaledHeight);
scaledWidth = x1 - x0;
setRight(scaledWidth);
}
else {
throw new IOException(MessageLocalization.getComposedMessage("not.a.valid.jpeg2000.file"));
}
}
finally {
if (inp != null) {
try{inp.close();}catch(Exception e){}
inp = null;
}
}
plainWidth = getWidth();
plainHeight = getHeight();
}
}