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Devin Jankowski
2023-06-21 12:46:23 -04:00
commit c70248a520
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iTechSharp/iTextSharp/text/Jpeg2000.cs Normal file
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using System;
using System.IO;
using System.Net;
using System.util;
using iTextSharp.text.pdf;
/*
* $Id: Jpeg2000.cs,v 1.5 2008/05/13 11:25:11 psoares33 Exp $
*
*
* Copyright 1999, 2000, 2001, 2002 by 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:
* http://www.lowagie.com/iText/
*/
namespace iTextSharp.text {
/**
* An <CODE>Jpeg2000</CODE> is the representation of a graphic element (JPEG)
* that has to be inserted into the document
*
* @see Element
* @see Image
*/
public class Jpeg2000 : Image {
// public static final membervariables
public const int JP2_JP = 0x6a502020;
public const int JP2_IHDR = 0x69686472;
public const int JPIP_JPIP = 0x6a706970;
public const int JP2_FTYP = 0x66747970;
public const int JP2_JP2H = 0x6a703268;
public const int JP2_COLR = 0x636f6c72;
public const int JP2_JP2C = 0x6a703263;
public const int JP2_URL = 0x75726c20;
public const int JP2_DBTL = 0x6474626c;
public const int JP2_BPCC = 0x62706363;
public const int JP2_JP2 = 0x6a703220;
private Stream inp;
private int boxLength;
private int boxType;
// Constructors
public Jpeg2000(Image image) : base(image) {
}
/**
* Constructs a <CODE>Jpeg2000</CODE>-object, using an <VAR>url</VAR>.
*
* @param url the <CODE>URL</CODE> where the image can be found
* @throws BadElementException
* @throws IOException
*/
public Jpeg2000(Uri url) : base(url) {
ProcessParameters();
}
/**
* Constructs a <CODE>Jpeg2000</CODE>-object from memory.
*
* @param img the memory image
* @throws BadElementException
* @throws IOException
*/
public Jpeg2000(byte[] img) : base((Uri)null) {
rawData = img;
originalData = img;
ProcessParameters();
}
/**
* Constructs a <CODE>Jpeg2000</CODE>-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) : this(img) {
scaledWidth = width;
scaledHeight = height;
}
private int Cio_read(int n) {
int v = 0;
for (int i = n - 1; i >= 0; i--) {
v += inp.ReadByte() << (i << 3);
}
return v;
}
public void Jp2_read_boxhdr() {
boxLength = Cio_read(4);
boxType = Cio_read(4);
if (boxLength == 1) {
if (Cio_read(4) != 0) {
throw new IOException("Cannot handle box sizes higher than 2^32");
}
boxLength = Cio_read(4);
if (boxLength == 0)
throw new IOException("Unsupported box size == 0");
}
else if (boxLength == 0) {
throw new IOException("Unsupported box size == 0");
}
}
/**
* This method checks if the image is a valid JPEG and processes some parameters.
* @throws BadElementException
* @throws IOException
*/
private void ProcessParameters() {
type = JPEG2000;
originalType = ORIGINAL_JPEG2000;
inp = null;
try {
string errorID;
if (rawData == null){
WebRequest w = WebRequest.Create(url);
inp = w.GetResponse().GetResponseStream();
errorID = url.ToString();
}
else{
inp = new MemoryStream(rawData);
errorID = "Byte array";
}
boxLength = Cio_read(4);
if (boxLength == 0x0000000c) {
boxType = Cio_read(4);
if (JP2_JP != 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 != boxType) {
throw new IOException("Expected FTYP Marker");
}
Utilities.Skip(inp, boxLength - 8);
Jp2_read_boxhdr();
do {
if (JP2_JP2H != boxType) {
if (boxType == JP2_JP2C) {
throw new IOException("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("Expected IHDR Marker");
}
scaledHeight = Cio_read(4);
Top = scaledHeight;
scaledWidth = Cio_read(4);
Right = scaledWidth;
bpc = -1;
}
else if ((uint)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;
Top = scaledHeight;
scaledWidth = x1 - x0;
Right = scaledWidth;
}
else {
throw new IOException("Not a valid Jpeg2000 file");
}
}
finally {
if (inp != null) {
try{inp.Close();}catch{}
inp = null;
}
}
plainWidth = this.Width;
plainHeight = this.Height;
}
}
}