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iText io.jar Source Code
io.jar is a component in iText Java library to provide input/output functionalities. iText Java library allows you to generate and manage PDF documents.
The Source Code files are provided together with the JAR file in the binary packge like iText7-Core-7.1.4.zip. You can download it at iText 7 Core Download site.
You can compile it to generate your JAR file, using io.pom as the build configuration file.
The source code of io-7.1.4.jar is provided below:
✍: FYIcenter.com
⏎ com/itextpdf/io/codec/TIFFLZWDecoder.java
/* * Copyright 2003-2012 by Paulo Soares. * * This code was originally released in 2001 by SUN (see class * com.sun.media.imageioimpl.plugins.tiff.TIFFLZWDecompressor.java) * using the BSD license in a specific wording. In a mail dating from * January 23, 2008, Brian Burkhalter (@sun.com) gave us permission * to use the code under the following version of the BSD license: * * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistribution of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistribution in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of Sun Microsystems, Inc. or the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * This software is provided "AS IS," without a warranty of any * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. * * You acknowledge that this software is not designed or intended for * use in the design, construction, operation or maintenance of any * nuclear facility. */ package com.itextpdf.io.codec; import com.itextpdf.io.IOException; /** * A class for performing LZW decoding. */ public class TIFFLZWDecoder { byte[][] stringTable; byte[] data = null; byte[] uncompData; int tableIndex; int bitsToGet = 9; int bytePointer; int bitPointer; int dstIndex; int w; int h; int predictor; int samplesPerPixel; int nextData = 0; int nextBits = 0; int[] andTable = { 511, 1023, 2047, 4095 }; public TIFFLZWDecoder(int w, int predictor, int samplesPerPixel) { this.w = w; this.predictor = predictor; this.samplesPerPixel = samplesPerPixel; } /** * Method to decode LZW compressed data. * * @param data The compressed data. * @param uncompData Array to return the uncompressed data in. * @param h The number of rows the compressed data contains. */ public byte[] decode(byte[] data, byte[] uncompData, int h) { if (data[0] == (byte) 0x00 && data[1] == (byte) 0x01) { throw new IOException(IOException.Tiff50StyleLzwCodesAreNotSupported); } initializeStringTable(); this.data = data; this.h = h; this.uncompData = uncompData; // Initialize pointers bytePointer = 0; bitPointer = 0; dstIndex = 0; nextData = 0; nextBits = 0; int code, oldCode = 0; byte[] str; while (((code = getNextCode()) != 257) && dstIndex < uncompData.length) { if (code == 256) { initializeStringTable(); code = getNextCode(); if (code == 257) { break; } writeString(stringTable[code]); oldCode = code; } else { if (code < tableIndex) { str = stringTable[code]; writeString(str); addStringToTable(stringTable[oldCode], str[0]); oldCode = code; } else { str = stringTable[oldCode]; str = composeString(str, str[0]); writeString(str); addStringToTable(str); oldCode = code; } } } // Horizontal Differencing Predictor if (predictor == 2) { int count; for (int j = 0; j < h; j++) { count = samplesPerPixel * (j * w + 1); for (int i = samplesPerPixel; i < w * samplesPerPixel; i++) { uncompData[count] += uncompData[count - samplesPerPixel]; count++; } } } return uncompData; } /** * Initialize the string table. */ public void initializeStringTable() { stringTable = new byte[4096][]; for (int i = 0; i < 256; i++) { stringTable[i] = new byte[1]; stringTable[i][0] = (byte) i; } tableIndex = 258; bitsToGet = 9; } /** * Write out the string just uncompressed. */ public void writeString(byte[] str) { // Fix for broken tiff files int max = uncompData.length - dstIndex; if (str.length < max) max = str.length; System.arraycopy(str, 0, uncompData, dstIndex, max); dstIndex += max; } /** * Add a new string to the string table. */ public void addStringToTable(byte[] oldString, byte newString) { int length = oldString.length; byte[] str = new byte[length + 1]; System.arraycopy(oldString, 0, str, 0, length); str[length] = newString; // Add this new String to the table stringTable[tableIndex++] = str; if (tableIndex == 511) { bitsToGet = 10; } else if (tableIndex == 1023) { bitsToGet = 11; } else if (tableIndex == 2047) { bitsToGet = 12; } } /** * Add a new string to the string table. */ public void addStringToTable(byte[] str) { // Add this new String to the table stringTable[tableIndex++] = str; if (tableIndex == 511) { bitsToGet = 10; } else if (tableIndex == 1023) { bitsToGet = 11; } else if (tableIndex == 2047) { bitsToGet = 12; } } /** * Append <code>newString</code> to the end of <code>oldString</code>. */ public byte[] composeString(byte[] oldString, byte newString) { int length = oldString.length; byte[] str = new byte[length + 1]; System.arraycopy(oldString, 0, str, 0, length); str[length] = newString; return str; } // Returns the next 9, 10, 11 or 12 bits public int getNextCode() { // Attempt to get the next code. The exception is caught to make // this robust to cases wherein the EndOfInformation code has been // omitted from a strip. Examples of such cases have been observed // in practice. try { nextData = (nextData << 8) | (data[bytePointer++] & 0xff); nextBits += 8; if (nextBits < bitsToGet) { nextData = (nextData << 8) | (data[bytePointer++] & 0xff); nextBits += 8; } int code = (nextData >> (nextBits - bitsToGet)) & andTable[bitsToGet - 9]; nextBits -= bitsToGet; return code; } catch (ArrayIndexOutOfBoundsException e) { // Strip not terminated as expected: return EndOfInformation code. return 257; } } }
⏎ com/itextpdf/io/codec/TIFFLZWDecoder.java
Or download all of them as a single archive file:
File name: io-7.1.4-sources.jar File size: 608762 bytes Release date: 2018-10-09 Download
⇒ iText layout.jar Source Code
⇐ iText kernel.jar Source Code
2018-04-09, 92051👍, 5💬
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