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Porting update. 

git-svn-id: svn://svn.code.sf.net/p/itextsharp/code/trunk@23 820d3149-562b-4f88-9aa4-a8e61a3485cf
master
psoares33 2009-06-11 10:05:36 +00:00
parent ed736f53d1
commit 753e17ad0c
7 changed files with 756 additions and 24 deletions
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65
src/core/iTextSharp/text/Image.cs
View File

@ -138,6 +138,12 @@ namespace iTextSharp.text {
/** type of image */
public const int ORIGINAL_JPEG2000 = 8;
/**
* type of image
* @since 2.1.5
*/
public const int ORIGINAL_JBIG2 = 9;
/** Image color inversion */
protected bool invert = false;
@ -347,6 +353,11 @@ namespace iTextSharp.text {
int c2 = istr.ReadByte();
int c3 = istr.ReadByte();
int c4 = istr.ReadByte();
// jbig2
int c5 = istr.ReadByte();
int c6 = istr.ReadByte();
int c7 = istr.ReadByte();
int c8 = istr.ReadByte();
istr.Close();
istr = null;
@ -395,6 +406,23 @@ namespace iTextSharp.text {
}
}
if ( c1 == 0x97 && c2 == 'J' && c3 == 'B' && c4 == '2' &&
c5 == '\r' && c6 == '\n' && c7 == 0x1a && c8 == '\n' ) {
RandomAccessFileOrArray ra = null;
try {
if (url.IsFile) {
String file = url.LocalPath;
ra = new RandomAccessFileOrArray(file);
} else
ra = new RandomAccessFileOrArray(url);
Image img = JBIG2Image.GetJbig2Image(ra, 1);
img.url = url;
return img;
} finally {
if (ra != null)
ra.Close();
}
}
throw new IOException(url.ToString()
+ " is not a recognized imageformat.");
} finally {
@ -410,6 +438,19 @@ namespace iTextSharp.text {
return GetInstance(a);
}
/**
* Creates a JBIG2 Image.
* @param width the width of the image
* @param height the height of the image
* @param data the raw image data
* @param globals JBIG2 globals
* @since 2.1.5
*/
public static Image GetInstance(int width, int height, byte[] data, byte[] globals) {
Image img = new ImgJBIG2(width, height, data, globals);
return img;
}
/// <summary>
/// Gets an instance of an Image.
/// </summary>
@ -1426,10 +1467,10 @@ namespace iTextSharp.text {
}
}
private PdfObject SimplifyColorspace(PdfObject obj) {
if (obj == null || !obj.IsArray())
private PdfObject SimplifyColorspace(PdfArray obj) {
if (obj == null)
return obj;
PdfObject first = (PdfObject)(((PdfArray)obj).ArrayList[0]);
PdfObject first = obj.GetAsName(0);
if (PdfName.CALGRAY.Equals(first))
return PdfName.DEVICEGRAY;
else if (PdfName.CALRGB.Equals(first))
@ -1444,18 +1485,22 @@ namespace iTextSharp.text {
public void SimplifyColorspace() {
if (additional == null)
return;
PdfObject value = additional.Get(PdfName.COLORSPACE);
if (value == null || !value.IsArray())
PdfArray value = additional.GetAsArray(PdfName.COLORSPACE);
if (value == null)
return;
PdfObject cs = SimplifyColorspace(value);
PdfObject newValue;
if (cs.IsName())
value = cs;
newValue = cs;
else {
PdfObject first = (PdfObject)(((PdfArray)value).ArrayList[0]);
newValue = value;
PdfName first = value.GetAsName(0);
if (PdfName.INDEXED.Equals(first)) {
ArrayList array = ((PdfArray)value).ArrayList;
if (array.Count >= 2 && ((PdfObject)array[1]).IsArray()) {
array[1] = SimplifyColorspace((PdfObject)array[1]);
if (value.Size >= 2) {
PdfArray second = value.GetAsArray(1);
if (second != null) {
value[1] = SimplifyColorspace(second);
}
}
}
}

129
src/core/iTextSharp/text/ImgJBIG2.cs 100644
View File

@ -0,0 +1,129 @@
using System;
using System.Security.Cryptography;
/*
* $Id: ImgJBIG2.java 3962 2009-06-10 11:43:19Z psoares33 $
*
* Copyright 2009 by Nigel Kerr.
*
* 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) 1999-2009 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2009 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 {
/**
* Support for JBIG2 images.
* @since 2.1.5
*/
public class ImgJBIG2 : Image {
/** JBIG2 globals */
private byte[] global;
/** A unique hash */
private byte[] globalHash;
/**
* Copy contstructor.
* @param image another Image
*/
ImgJBIG2(Image image) : base(image) {
}
/**
* Empty constructor.
*/
public ImgJBIG2() : base((Image) null) {
}
/**
* Actual constructor for ImgJBIG2 images.
* @param width the width of the image
* @param height the height of the image
* @param data the raw image data
* @param globals JBIG2 globals
*/
public ImgJBIG2(int width, int height, byte[] data, byte[] globals) : base((Uri)null) {
type = Element.JBIG2;
originalType = ORIGINAL_JBIG2;
scaledHeight = height;
this.Top = scaledHeight;
scaledWidth = width;
this.Right = scaledWidth;
bpc = 1;
colorspace = 1;
rawData = data;
plainWidth = this.Width;
plainHeight = this.Height;
if ( globals != null ) {
this.global = globals;
try {
MD5 md5 = new MD5CryptoServiceProvider();
md5.Initialize();
this.globalHash = md5.ComputeHash(this.global);
} catch {
//ignore
}
}
}
/**
* Getter for the JBIG2 global data.
* @return an array of bytes
*/
public byte[] GlobalBytes {
get {
return this.global;
}
}
/**
* Getter for the unique hash.
* @return an array of bytes
*/
public byte[] GlobalHash {
get {
return this.globalHash;
}
}
}
}

24
src/core/iTextSharp/text/pdf/PdfArray.cs
View File

@ -155,8 +155,7 @@ public class PdfArray : PdfObject {
// ARRAY CONTENT METHODS
/**
* Overwrites a specified location of the array, returning the previous
* value
* Overwrites a specified location of the array.
*
* @param idx The index of the element to be overwritten
* @param obj new value for the specified index
@ -164,10 +163,13 @@ public class PdfArray : PdfObject {
* @return the previous value
* @since 2.1.5
*/
public PdfObject SetPdfObject(int idx, PdfObject obj) {
PdfObject tmp = (PdfObject)arrayList[idx];
arrayList[idx] = obj;
return tmp;
public PdfObject this[int idx] {
get {
return (PdfObject)arrayList[idx];
}
set {
arrayList[idx] = value;
}
}
/**
@ -292,12 +294,12 @@ public class PdfArray : PdfObject {
return arrayList.ToString();
}
public PdfObject GetPdfObject( int idx ) {
return (PdfObject)arrayList[idx];
}
// public PdfObject GetPdfObject( int idx ) {
// return (PdfObject)arrayList[idx];
// }
public PdfObject GetDirectObject( int idx ) {
return PdfReader.GetPdfObject(GetPdfObject(idx));
return PdfReader.GetPdfObject(this[idx]);
}
// more of the same like PdfDictionary. (MAS 2/17/06)
@ -359,7 +361,7 @@ public class PdfArray : PdfObject {
public PdfIndirectReference GetAsIndirectObject(int idx) {
PdfIndirectReference refi = null;
PdfObject orig = GetPdfObject(idx); // not getDirect this time.
PdfObject orig = this[idx]; // not getDirect this time.
if (orig != null && orig.IsIndirect())
refi = (PdfIndirectReference) orig;
return refi;

6
src/core/iTextSharp/text/pdf/PdfStamperImp.cs
View File

@ -1524,7 +1524,7 @@ namespace iTextSharp.text.pdf {
PdfObject obj;
PdfLayer layer;
for (int i = 0; i < arr.Size; i++) {
obj = arr.GetPdfObject(i);
obj = arr[i];
if (obj.IsIndirect()) {
layer = (PdfLayer)ocgmap[obj.ToString()];
layer.OnPanel = true;
@ -1532,9 +1532,9 @@ namespace iTextSharp.text.pdf {
if (parent != null) {
parent.AddChild(layer);
}
if (arr.Size > i + 1 && arr.GetPdfObject(i + 1).IsArray()) {
if (arr.Size > i + 1 && arr[i + 1].IsArray()) {
i++;
AddOrder(layer, (PdfArray)arr.GetPdfObject(i), ocgmap);
AddOrder(layer, (PdfArray)arr[i], ocgmap);
}
}
else if (obj.IsArray()) {

107
src/core/iTextSharp/text/pdf/codec/JBIG2Image.cs 100644
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@ -0,0 +1,107 @@
using System;
using iTextSharp.text;
using iTextSharp.text.pdf;
/*
* $Id: JBIG2Image.java 3715 2009-02-23 15:02:23Z blowagie $
*
* Copyright 2009 by Nigel Kerr.
*
* 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) 1999-2009 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2009 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.pdf.codec {
/**
* Support for JBIG2 Images.
* This class assumes that we are always embedding into a pdf.
*
* @since 2.1.5
*/
public class JBIG2Image {
/**
* Gets a byte array that can be used as a /JBIG2Globals,
* or null if not applicable to the given jbig2.
* @param ra an random access file or array
* @return a byte array
*/
public static byte[] GetGlobalSegment(RandomAccessFileOrArray ra ) {
try {
JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
sr.Read();
return sr.GetGlobal(true);
} catch {
return null;
}
}
/**
* returns an Image representing the given page.
* @param ra the file or array containing the image
* @param page the page number of the image
* @return an Image object
*/
public static Image GetJbig2Image(RandomAccessFileOrArray ra, int page) {
if (page < 1)
throw new ArgumentException("The page number must be >= 1.");
JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
sr.Read();
JBIG2SegmentReader.JBIG2Page p = sr.GetPage(page);
Image img = new ImgJBIG2(p.pageBitmapWidth, p.pageBitmapHeight, p.GetData(true), sr.GetGlobal(true));
return img;
}
/***
* Gets the number of pages in a JBIG2 image.
* @param ra a random acces file array containing a JBIG2 image
* @return the number of pages
*/
public static int GetNumberOfPages(RandomAccessFileOrArray ra) {
JBIG2SegmentReader sr = new JBIG2SegmentReader(ra);
sr.Read();
return sr.NumberOfPages();
}
}
}

434
src/core/iTextSharp/text/pdf/codec/JBIG2SegmentReader.cs 100644
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@ -0,0 +1,434 @@
using System;
using System.IO;
using System.util.collections;
using iTextSharp.text.pdf;
/*
* $Id: JBIG2SegmentReader.java 3714 2009-02-20 21:04:16Z xlv $
*
* Copyright 2009 by Nigel Kerr.
*
* 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) 1999-2009 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2009 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.pdf.codec {
/**
* Class to read a JBIG2 file at a basic level: understand all the segments,
* understand what segments belong to which pages, how many pages there are,
* what the width and height of each page is, and global segments if there
* are any. Or: the minimum required to be able to take a normal sequential
* or random-access organized file, and be able to embed JBIG2 pages as images
* in a PDF.
*
* TODO: the indeterminate-segment-size value of dataLength, else?
*
* @since 2.1.5
*/
public class JBIG2SegmentReader {
public const int SYMBOL_DICTIONARY = 0; //see 7.4.2.
public const int INTERMEDIATE_TEXT_REGION = 4; //see 7.4.3.
public const int IMMEDIATE_TEXT_REGION = 6; //see 7.4.3.
public const int IMMEDIATE_LOSSLESS_TEXT_REGION = 7; //see 7.4.3.
public const int PATTERN_DICTIONARY = 16; //see 7.4.4.
public const int INTERMEDIATE_HALFTONE_REGION = 20; //see 7.4.5.
public const int IMMEDIATE_HALFTONE_REGION = 22; //see 7.4.5.
public const int IMMEDIATE_LOSSLESS_HALFTONE_REGION = 23; //see 7.4.5.
public const int INTERMEDIATE_GENERIC_REGION = 36; //see 7.4.6.
public const int IMMEDIATE_GENERIC_REGION = 38; //see 7.4.6.
public const int IMMEDIATE_LOSSLESS_GENERIC_REGION = 39; //see 7.4.6.
public const int INTERMEDIATE_GENERIC_REFINEMENT_REGION = 40; //see 7.4.7.
public const int IMMEDIATE_GENERIC_REFINEMENT_REGION = 42; //see 7.4.7.
public const int IMMEDIATE_LOSSLESS_GENERIC_REFINEMENT_REGION = 43; //see 7.4.7.
public const int PAGE_INFORMATION = 48; //see 7.4.8.
public const int END_OF_PAGE = 49; //see 7.4.9.
public const int END_OF_STRIPE = 50; //see 7.4.10.
public const int END_OF_FILE = 51; //see 7.4.11.
public const int PROFILES = 52; //see 7.4.12.
public const int TABLES = 53; //see 7.4.13.
public const int EXTENSION = 62; //see 7.4.14.
private k_Tree segments = new k_Tree();
private k_Tree pages = new k_Tree();
private k_Tree globals = new k_Tree();
private RandomAccessFileOrArray ra;
private bool sequential;
private bool number_of_pages_known;
private int number_of_pages = -1;
private bool read = false;
/**
* Inner class that holds information about a JBIG2 segment.
* @since 2.1.5
*/
public class JBIG2Segment : IComparable {
public int segmentNumber;
public long dataLength = -1;
public int page = -1;
public int[] referredToSegmentNumbers = null;
public bool[] segmentRetentionFlags = null;
public int type = -1;
public bool deferredNonRetain = false;
public int countOfReferredToSegments = -1;
public byte[] data = null;
public byte[] headerData = null;
public bool page_association_size = false;
public int page_association_offset = -1;
public JBIG2Segment(int segment_number) {
this.segmentNumber = segment_number;
}
// for the globals treeset
public int CompareTo(Object o) {
return this.CompareTo((JBIG2Segment)o);
}
public int CompareTo(JBIG2Segment s) {
return this.segmentNumber - s.segmentNumber;
}
}
/**
* Inner class that holds information about a JBIG2 page.
* @since 2.1.5
*/
public class JBIG2Page {
public int page;
private JBIG2SegmentReader sr;
private k_Tree segs = new k_Tree();
public int pageBitmapWidth = -1;
public int pageBitmapHeight = -1;
public JBIG2Page(int page, JBIG2SegmentReader sr) {
this.page = page;
this.sr = sr;
}
/**
* return as a single byte array the header-data for each segment in segment number
* order, EMBEDDED organization, but i am putting the needed segments in SEQUENTIAL organization.
* if for_embedding, skip the segment types that are known to be not for acrobat.
* @param for_embedding
* @return a byte array
* @throws IOException
*/
public byte[] GetData(bool for_embedding) {
MemoryStream os = new MemoryStream();
foreach (int sn in segs.Keys) {
JBIG2Segment s = (JBIG2Segment)segs[sn];
// pdf reference 1.4, section 3.3.6 JBIG2Decode Filter
// D.3 Embedded organisation
if ( for_embedding &&
( s.type == END_OF_FILE || s.type == END_OF_PAGE ) ) {
continue;
}
if ( for_embedding ) {
// change the page association to page 1
byte[] headerData_emb = CopyByteArray(s.headerData);
if ( s.page_association_size ) {
headerData_emb[s.page_association_offset] = 0x0;
headerData_emb[s.page_association_offset+1] = 0x0;
headerData_emb[s.page_association_offset+2] = 0x0;
headerData_emb[s.page_association_offset+3] = 0x1;
} else {
headerData_emb[s.page_association_offset] = 0x1;
}
os.Write(headerData_emb, 0, headerData_emb.Length);
} else {
os.Write(s.headerData, 0, s.headerData.Length);
}
os.Write(s.data, 0, s.data.Length);
}
os.Close();
return os.ToArray();
}
public void AddSegment(JBIG2Segment s) {
segs[s.segmentNumber] = s;
}
}
public JBIG2SegmentReader(RandomAccessFileOrArray ra ) {
this.ra = ra;
}
public static byte[] CopyByteArray(byte[] b) {
byte[] bc = new byte[b.Length];
System.Array.Copy(b, 0, bc, 0, b.Length);
return bc;
}
public void Read() {
if ( this.read ) {
throw new InvalidOperationException("already attempted a Read() on this Jbig2 File");
}
this.read = true;
ReadFileHeader();
// Annex D
if ( this.sequential ) {
// D.1
do {
JBIG2Segment tmp = ReadHeader();
ReadSegment(tmp);
segments[tmp.segmentNumber] = tmp;
} while ( this.ra.FilePointer < this.ra.Length);
} else {
// D.2
JBIG2Segment tmp;
do {
tmp = ReadHeader();
segments[tmp.segmentNumber] = tmp;
} while ( tmp.type != END_OF_FILE );
foreach (int ss in segments.Keys) {
ReadSegment((JBIG2Segment)segments[ss]);
}
}
}
void ReadSegment(JBIG2Segment s) {
int ptr = ra.FilePointer;
if ( s.dataLength == 0xffffffffL ) {
// TODO figure this bit out, 7.2.7
return;
}
byte[] data = new byte[(int)s.dataLength];
ra.Read(data);
s.data = data;
if ( s.type == PAGE_INFORMATION ) {
int last = ra.FilePointer;
ra.Seek(ptr);
int page_bitmap_width = ra.ReadInt();
int page_bitmap_height = ra.ReadInt();
ra.Seek(last);
JBIG2Page p = (JBIG2Page)pages[s.page];
if ( p == null ) {
throw new InvalidOperationException("referring to widht/height of page we havent seen yet? " + s.page);
}
p.pageBitmapWidth = page_bitmap_width;
p.pageBitmapHeight = page_bitmap_height;
}
}
JBIG2Segment ReadHeader() {
int ptr = ra.FilePointer;
// 7.2.1
int segment_number = ra.ReadInt();
JBIG2Segment s = new JBIG2Segment(segment_number);
// 7.2.3
int segment_header_flags = ra.Read();
bool deferred_non_retain = (( segment_header_flags & 0x80 ) == 0x80);
s.deferredNonRetain = deferred_non_retain;
bool page_association_size = (( segment_header_flags & 0x40 ) == 0x40);
int segment_type = ( segment_header_flags & 0x3f );
s.type = segment_type;
//7.2.4
int referred_to_byte0 = ra.Read();
int count_of_referred_to_segments = (referred_to_byte0 & 0xE0) >> 5;
int[] referred_to_segment_numbers = null;
bool[] segment_retention_flags = null;
if ( count_of_referred_to_segments == 7 ) {
// at least five bytes
ra.Seek(ra.FilePointer - 1);
count_of_referred_to_segments = ( ra.ReadInt() & 0x1fffffff );
segment_retention_flags = new bool[count_of_referred_to_segments+1];
int i = 0;
int referred_to_current_byte = 0;
do {
int j = i % 8;
if ( j == 0) {
referred_to_current_byte = ra.Read();
}
segment_retention_flags[i] = (((( 0x1 << j ) & referred_to_current_byte) >> j) == 0x1);
i++;
} while ( i <= count_of_referred_to_segments );
} else if ( count_of_referred_to_segments <= 4 ) {
// only one byte
segment_retention_flags = new bool[count_of_referred_to_segments+1];
referred_to_byte0 &= 0x1f;
for ( int i = 0; i <= count_of_referred_to_segments; i++ ) {
segment_retention_flags[i] = (((( 0x1 << i ) & referred_to_byte0) >> i) == 0x1);
}
} else if ( count_of_referred_to_segments == 5 || count_of_referred_to_segments == 6 ) {
throw new InvalidOperationException("count of referred-to segments had bad value in header for segment " + segment_number + " starting at " + ptr);
}
s.segmentRetentionFlags = segment_retention_flags;
s.countOfReferredToSegments = count_of_referred_to_segments;
// 7.2.5
referred_to_segment_numbers = new int[count_of_referred_to_segments+1];
for ( int i = 1; i <= count_of_referred_to_segments; i++ ) {
if ( segment_number <= 256 ) {
referred_to_segment_numbers[i] = ra.Read();
} else if ( segment_number <= 65536 ) {
referred_to_segment_numbers[i] = ra.ReadUnsignedShort();
} else {
referred_to_segment_numbers[i] = (int)ra.ReadUnsignedInt(); // TODO wtf ack
}
}
s.referredToSegmentNumbers = referred_to_segment_numbers;
// 7.2.6
int segment_page_association;
int page_association_offset = ra.FilePointer - ptr;
if ( page_association_size ) {
segment_page_association = ra.ReadInt();
} else {
segment_page_association = ra.Read();
}
if ( segment_page_association < 0 ) {
throw new InvalidOperationException("page " + segment_page_association + " invalid for segment " + segment_number + " starting at " + ptr);
}
s.page = segment_page_association;
// so we can change the page association at embedding time.
s.page_association_size = page_association_size;
s.page_association_offset = page_association_offset;
if ( segment_page_association > 0 && ! pages.Contains(segment_page_association) ) {
pages[segment_page_association] = new JBIG2Page(segment_page_association, this);
}
if ( segment_page_association > 0 ) {
((JBIG2Page)pages[segment_page_association]).AddSegment(s);
} else {
globals[s] = null;
}
// 7.2.7
long segment_data_length = ra.ReadUnsignedInt();
// TODO the 0xffffffff value that might be here, and how to understand those afflicted segments
s.dataLength = segment_data_length;
int end_ptr = ra.FilePointer;
ra.Seek(ptr);
byte[] header_data = new byte[end_ptr - ptr];
ra.Read(header_data);
s.headerData = header_data;
return s;
}
void ReadFileHeader() {
ra.Seek(0);
byte[] idstring = new byte[8];
ra.Read(idstring);
byte[] refidstring = {(byte)0x97, 0x4A, 0x42, 0x32, 0x0D, 0x0A, 0x1A, 0x0A};
for ( int i = 0; i < idstring.Length; i++ ) {
if ( idstring[i] != refidstring[i] ) {
throw new InvalidOperationException("file header idstring not good at byte " + i);
}
}
int fileheaderflags = ra.Read();
this.sequential = (( fileheaderflags & 0x1 ) == 0x1);
this.number_of_pages_known = (( fileheaderflags & 0x2) == 0x0);
if ( (fileheaderflags & 0xfc) != 0x0 ) {
throw new InvalidOperationException("file header flags bits 2-7 not 0");
}
if ( this.number_of_pages_known ) {
this.number_of_pages = ra.ReadInt();
}
}
public int NumberOfPages() {
return pages.Count;
}
public int GetPageHeight(int i) {
return ((JBIG2Page)pages[i]).pageBitmapHeight;
}
public int GetPageWidth(int i) {
return ((JBIG2Page)pages[i]).pageBitmapWidth;
}
public JBIG2Page GetPage(int page) {
return (JBIG2Page)pages[page];
}
public byte[] GetGlobal(bool for_embedding) {
MemoryStream os = new MemoryStream();
try {
foreach (JBIG2Segment s in globals.Keys) {
if ( for_embedding &&
( s.type == END_OF_FILE || s.type == END_OF_PAGE ) ) {
continue;
}
os.Write(s.headerData, 0, s.headerData.Length);
os.Write(s.data, 0, s.data.Length);
}
os.Close();
} catch {
}
if ( os.Length <= 0 ) {
return null;
}
return os.ToArray();
}
public override String ToString() {
if ( this.read ) {
return "Jbig2SegmentReader: number of pages: " + this.NumberOfPages();
} else {
return "Jbig2SegmentReader in indeterminate state.";
}
}
}
}

15
src/core/itextsharp.csproj
View File

@ -227,6 +227,11 @@
SubType = "Code"
BuildAction = "Compile"
/>
<File
RelPath = "iTextSharp\text\ImgJBIG2.cs"
SubType = "Code"
BuildAction = "Compile"
/>
<File
RelPath = "iTextSharp\text\ImgRaw.cs"
SubType = "Code"
@ -1332,6 +1337,16 @@
SubType = "Code"
BuildAction = "Compile"
/>
<File
RelPath = "iTextSharp\text\pdf\codec\JBIG2Image.cs"
SubType = "Code"
BuildAction = "Compile"
/>
<File
RelPath = "iTextSharp\text\pdf\codec\JBIG2SegmentReader.cs"
SubType = "Code"
BuildAction = "Compile"
/>
<File
RelPath = "iTextSharp\text\pdf\codec\PngImage.cs"
SubType = "Code"