tifffaxdecoder.java

源码包含生成 PDF 和 HTML 的类库

/*
 * Copyright 2003-2009 by Paulo Soares.
 * 
 * This code was originally released in 2001 by SUN (see class
 * com.sun.media.imageioimpl.plugins.tiff.TIFFFaxDecompressor.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.lowagie.text.pdf.codec;

public class TIFFFaxDecoder {
    
    private int bitPointer, bytePointer;
    private byte[] data;
    private int w, h;
    private int fillOrder;
    
    // Data structures needed to store changing elements for the previous
    // and the current scanline
    private int changingElemSize = 0;
    private int prevChangingElems[];
    private int currChangingElems[];
    
    // Element at which to start search in getNextChangingElement
    private int lastChangingElement = 0;
    
    private int compression = 2;
    
    // Variables set by T4Options
    private int uncompressedMode = 0;
    private int fillBits = 0;
    private int oneD;
    
    static int table1[] = {
        0x00, // 0 bits are left in first byte - SHOULD NOT HAPPEN
        0x01, // 1 bits are left in first byte
        0x03, // 2 bits are left in first byte
        0x07, // 3 bits are left in first byte
        0x0f, // 4 bits are left in first byte
        0x1f, // 5 bits are left in first byte
        0x3f, // 6 bits are left in first byte
        0x7f, // 7 bits are left in first byte
        0xff  // 8 bits are left in first byte
    };
    
    static int table2[] = {
        0x00, // 0
        0x80, // 1
        0xc0, // 2
        0xe0, // 3
        0xf0, // 4
        0xf8, // 5
        0xfc, // 6
        0xfe, // 7
        0xff  // 8
    };
    
    // Table to be used when fillOrder = 2, for flipping bytes.
    static byte flipTable[] = {
        0,  -128,    64,   -64,    32,   -96,    96,   -32,
        16,  -112,    80,   -48,    48,   -80,   112,   -16,
        8,  -120,    72,   -56,    40,   -88,   104,   -24,
        24,  -104,    88,   -40,    56,   -72,   120,    -8,
        4,  -124,    68,   -60,    36,   -92,   100,   -28,
        20,  -108,    84,   -44,    52,   -76,   116,   -12,
        12,  -116,    76,   -52,    44,   -84,   108,   -20,
        28,  -100,    92,   -36,    60,   -68,   124,    -4,
        2,  -126,    66,   -62,    34,   -94,    98,   -30,
        18,  -110,    82,   -46,    50,   -78,   114,   -14,
        10,  -118,    74,   -54,    42,   -86,   106,   -22,
        26,  -102,    90,   -38,    58,   -70,   122,    -6,
        6,  -122,    70,   -58,    38,   -90,   102,   -26,
        22,  -106,    86,   -42,    54,   -74,   118,   -10,
        14,  -114,    78,   -50,    46,   -82,   110,   -18,
        30,   -98,    94,   -34,    62,   -66,   126,    -2,
        1,  -127,    65,   -63,    33,   -95,    97,   -31,
        17,  -111,    81,   -47,    49,   -79,   113,   -15,
        9,  -119,    73,   -55,    41,   -87,   105,   -23,
        25,  -103,    89,   -39,    57,   -71,   121,    -7,
        5,  -123,    69,   -59,    37,   -91,   101,   -27,
        21,  -107,    85,   -43,    53,   -75,   117,   -11,
        13,  -115,    77,   -51,    45,   -83,   109,   -19,
        29,   -99,    93,   -35,    61,   -67,   125,    -3,
        3,  -125,    67,   -61,    35,   -93,    99,   -29,
        19,  -109,    83,   -45,    51,   -77,   115,   -13,
        11,  -117,    75,   -53,    43,   -85,   107,   -21,
        27,  -101,    91,   -37,    59,   -69,   123,    -5,
        7,  -121,    71,   -57,    39,   -89,   103,   -25,
        23,  -105,    87,   -41,    55,   -73,   119,    -9,
        15,  -113,    79,   -49,    47,   -81,   111,   -17,
        31,   -97,    95,   -33,    63,   -65,   127,    -1,
    };
    
    // The main 10 bit white runs lookup table
    static short white[] = {
        // 0 - 7
        6430,   6400,   6400,   6400,   3225,   3225,   3225,   3225,
        // 8 - 15
        944,    944,    944,    944,    976,    976,    976,    976,
        // 16 - 23
        1456,   1456,   1456,   1456,   1488,   1488,   1488,   1488,
        // 24 - 31
        718,    718,    718,    718,    718,    718,    718,    718,
        // 32 - 39
        750,    750,    750,    750,    750,    750,    750,    750,
        // 40 - 47
        1520,   1520,   1520,   1520,   1552,   1552,   1552,   1552,
        // 48 - 55
        428,    428,    428,    428,    428,    428,    428,    428,
        // 56 - 63
        428,    428,    428,    428,    428,    428,    428,    428,
        // 64 - 71
        654,    654,    654,    654,    654,    654,    654,    654,
        // 72 - 79
        1072,   1072,   1072,   1072,   1104,   1104,   1104,   1104,
        // 80 - 87
        1136,   1136,   1136,   1136,   1168,   1168,   1168,   1168,
        // 88 - 95
        1200,   1200,   1200,   1200,   1232,   1232,   1232,   1232,
        // 96 - 103
        622,    622,    622,    622,    622,    622,    622,    622,
        // 104 - 111
        1008,   1008,   1008,   1008,   1040,   1040,   1040,   1040,
        // 112 - 119
        44,     44,     44,     44,     44,     44,     44,     44,
        // 120 - 127
        44,     44,     44,     44,     44,     44,     44,     44,
        // 128 - 135
        396,    396,    396,    396,    396,    396,    396,    396,
        // 136 - 143
        396,    396,    396,    396,    396,    396,    396,    396,
        // 144 - 151
        1712,   1712,   1712,   1712,   1744,   1744,   1744,   1744,
        // 152 - 159
        846,    846,    846,    846,    846,    846,    846,    846,
        // 160 - 167
        1264,   1264,   1264,   1264,   1296,   1296,   1296,   1296,
        // 168 - 175
        1328,   1328,   1328,   1328,   1360,   1360,   1360,   1360,
        // 176 - 183
        1392,   1392,   1392,   1392,   1424,   1424,   1424,   1424,
        // 184 - 191
        686,    686,    686,    686,    686,    686,    686,    686,
        // 192 - 199
        910,    910,    910,    910,    910,    910,    910,    910,
        // 200 - 207
        1968,   1968,   1968,   1968,   2000,   2000,   2000,   2000,
        // 208 - 215
        2032,   2032,   2032,   2032,     16,     16,     16,     16,
        // 216 - 223
        10257,  10257,  10257,  10257,  12305,  12305,  12305,  12305,
        // 224 - 231
        330,    330,    330,    330,    330,    330,    330,    330,
        // 232 - 239
        330,    330,    330,    330,    330,    330,    330,    330,
        // 240 - 247
        330,    330,    330,    330,    330,    330,    330,    330,
        // 248 - 255
        330,    330,    330,    330,    330,    330,    330,    330,
        // 256 - 263
        362,    362,    362,    362,    362,    362,    362,    362,
        // 264 - 271
        362,    362,    362,    362,    362,    362,    362,    362,
        // 272 - 279
        362,    362,    362,    362,    362,    362,    362,    362,
        // 280 - 287
        362,    362,    362,    362,    362,    362,    362,    362,
        // 288 - 295
        878,    878,    878,    878,    878,    878,    878,    878,
        // 296 - 303
        1904,   1904,   1904,   1904,   1936,   1936,   1936,   1936,
        // 304 - 311
        -18413, -18413, -16365, -16365, -14317, -14317, -10221, -10221,
        // 312 - 319
        590,    590,    590,    590,    590,    590,    590,    590,
        // 320 - 327
        782,    782,    782,    782,    782,    782,    782,    782,
        // 328 - 335
        1584,   1584,   1584,   1584,   1616,   1616,   1616,   1616,
        // 336 - 343
        1648,   1648,   1648,   1648,   1680,   1680,   1680,   1680,
        // 344 - 351
        814,    814,    814,    814,    814,    814,    814,    814,
        // 352 - 359
        1776,   1776,   1776,   1776,   1808,   1808,   1808,   1808,
        // 360 - 367
        1840,   1840,   1840,   1840,   1872,   1872,   1872,   1872,
        // 368 - 375
        6157,   6157,   6157,   6157,   6157,   6157,   6157,   6157,
        // 376 - 383
        6157,   6157,   6157,   6157,   6157,   6157,   6157,   6157,
        // 384 - 391
        -12275, -12275, -12275, -12275, -12275, -12275, -12275, -12275,
        // 392 - 399
        -12275, -12275, -12275, -12275, -12275, -12275, -12275, -12275,
        // 400 - 407
        14353,  14353,  14353,  14353,  16401,  16401,  16401,  16401,
        // 408 - 415
        22547,  22547,  24595,  24595,  20497,  20497,  20497,  20497,
        // 416 - 423
        18449,  18449,  18449,  18449,  26643,  26643,  28691,  28691,
        // 424 - 431
        30739,  30739, -32749, -32749, -30701, -30701, -28653, -28653,
        // 432 - 439
        -26605, -26605, -24557, -24557, -22509, -22509, -20461, -20461,
        // 440 - 447
        8207,   8207,   8207,   8207,   8207,   8207,   8207,   8207,
        // 448 - 455
        72,     72,     72,     72,     72,     72,     72,     72,
        // 456 - 463
        72,     72,     72,     72,     72,     72,     72,     72,
        // 464 - 471
        72,     72,     72,     72,     72,     72,     72,     72,
        // 472 - 479
        72,     72,     72,     72,     72,     72,     72,     72,
        // 480 - 487
        72,     72,     72,     72,     72,     72,     72,     72,
        // 488 - 495
        72,     72,     72,     72,     72,     72,     72,     72,
        // 496 - 503
        72,     72,     72,     72,     72,     72,     72,     72,
        // 504 - 511
        72,     72,     72,     72,     72,     72,     72,     72,
        // 512 - 519
        104,    104,    104,    104,    104,    104,    104,    104,
        // 520 - 527
        104,    104,    104,    104,    104,    104,    104,    104,
        // 528 - 535
        104,    104,    104,    104,    104,    104,    104,    104,
        // 536 - 543
        104,    104,    104,    104,    104,    104,    104,    104,
        // 544 - 551
        104,    104,    104,    104,    104,    104,    104,    104,
        // 552 - 559
        104,    104,    104,    104,    104,    104,    104,    104,
        // 560 - 567
        104,    104,    104,    104,    104,    104,    104,    104,
        // 568 - 575
        104,    104,    104,    104,    104,    104,    104,    104,
        // 576 - 583
        4107,   4107,   4107,   4107,   4107,   4107,   4107,   4107,
        // 584 - 591
        4107,   4107,   4107,   4107,   4107,   4107,   4107,   4107,
        // 592 - 599
        4107,   4107,   4107,   4107,   4107,   4107,   4107,   4107,
        // 600 - 607
        4107,   4107,   4107,   4107,   4107,   4107,   4107,   4107,
        // 608 - 615
        266,    266,    266,    266,    266,    266,    266,    266,
        // 616 - 623
        266,    266,    266,    266,    266,    266,    266,    266,
        // 624 - 631
        266,    266,    266,    266,    266,    266,    266,    266,
        // 632 - 639
        266,    266,    266,    266,    266,    266,    266,    266,
        // 640 - 647
        298,    298,    298,    298,    298,    298,    298,    298,
        // 648 - 655
        298,    298,    298,    298,    298,    298,    298,    298,
        // 656 - 663
        298,    298,    298,    298,    298,    298,    298,    298,
        // 664 - 671
        298,    298,    298,    298,    298,    298,    298,    298,
        // 672 - 679
        524,    524,    524,    524,    524,    524,    524,    524,
        // 680 - 687
        524,    524,    524,    524,    524,    524,    524,    524,
        // 688 - 695
        556,    556,    556,    556,    556,    556,    556,    556,
        // 696 - 703
        556,    556,    556,    556,    556,    556,    556,    556,
        // 704 - 711
        136,    136,    136,    136,    136,    136,    136,    136,
        // 712 - 719
        136,    136,    136,    136,    136,    136,    136,    136,
        // 720 - 727
        136,    136,    136,    136,    136,    136,    136,    136,
        // 728 - 735
        136,    136,    136,    136,    136,    136,    136,    136,
        // 736 - 743
        136,    136,    136,    136,    136,    136,    136,    136,
        // 744 - 751
        136,    136,    136,    136,    136,    136,    136,    136,
        // 752 - 759
        136,    136,    136,    136,    136,    136,    136,    136,
        // 760 - 767
        136,    136,    136,    136,    136,    136,    136,    136,
        // 768 - 775
        168,    168,    168,    168,    168,    168,    168,    168,
        // 776 - 783
        168,    168,    168,    168,    168,    168,    168,    168,
        // 784 - 791
        168,    168,    168,    168,    168,    168,    168,    168,
        // 792 - 799
        168,    168,    168,    168,    168,    168,    168,    168,
        // 800 - 807
        168,    168,    168,    168,    168,    168,    168,    168,
        // 808 - 815
        168,    168,    168,    168,    168,    168,    168,    168,
        // 816 - 823
        168,    168,    168,    168,    168,    168,    168,    168,
        // 824 - 831
        168,    168,    168,    168,    168,    168,    168,    168,
        // 832 - 839
        460,    460,    460,    460,    460,    460,    460,    460,
        // 840 - 847
        460,    460,    460,    460,    460,    460,    460,    460,
        // 848 - 855
        492,    492,    492,    492,    492,    492,    492,    492,
        // 856 - 863
        492,    492,    492,    492,    492,    492,    492,    492,
        // 864 - 871
        2059,   2059,   2059,   2059,   2059,   2059,   2059,   2059,
        // 872 - 879
        2059,   2059,   2059,   2059,   2059,   2059,   2059,   2059,
        // 880 - 887
        2059,   2059,   2059,   2059,   2059,   2059,   2059,   2059,
        // 888 - 895
        2059,   2059,   2059,   2059,   2059,   2059,   2059,   2059,
        // 896 - 903
        200,    200,    200,    200,    200,    200,    200,    200,
        // 904 - 911
        200,    200,    200,    200,    200,    200,    200,    200,
        // 912 - 919
        200,    200,    200,    200,    200,    200,    200,    200,
        // 920 - 927
        200,    200,    200,    200,    200,    200,    200,    200,
        // 928 - 935
        200,    200,    200,    200,    200,    200,    200,    200,
        // 936 - 943
        200,    200,    200,    200,    200,    200,    200,    200,
        // 944 - 951
        200,    200,    200,    200,    200,    200,    200,    200,
        // 952 - 959
        200,    200,    200,    200,    200,    200,    200,    200,
        // 960 - 967
        232,    232,    232,    232,    232,    232,    232,    232,
        // 968 - 975
        232,    232,    232,    232,    232,    232,    232,    232,
        // 976 - 983