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1735 lines
57 KiB
1735 lines
57 KiB
/* |
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* Copyright (c) 1990-1997 Sam Leffler |
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* Copyright (c) 1991-1997 Silicon Graphics, Inc. |
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* |
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* Permission to use, copy, modify, distribute, and sell this software and |
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* its documentation for any purpose is hereby granted without fee, provided |
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* that (i) the above copyright notices and this permission notice appear in |
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* all copies of the software and related documentation, and (ii) the names of |
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* Sam Leffler and Silicon Graphics may not be used in any advertising or |
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* publicity relating to the software without the specific, prior written |
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* permission of Sam Leffler and Silicon Graphics. |
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* |
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY |
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
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* |
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* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR |
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, |
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF |
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
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* OF THIS SOFTWARE. |
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*/ |
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|
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#include "tiffiop.h" |
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#ifdef CCITT_SUPPORT |
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/* |
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* TIFF Library. |
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* |
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* CCITT Group 3 (T.4) and Group 4 (T.6) Compression Support. |
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* |
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* This file contains support for decoding and encoding TIFF |
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* compression algorithms 2, 3, 4, and 32771. |
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* |
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* Decoder support is derived, with permission, from the code |
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* in Frank Cringle's viewfax program; |
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* Copyright (C) 1990, 1995 Frank D. Cringle. |
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*/ |
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#include "tif_fax3.h" |
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#define G3CODES |
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#include "t4.h" |
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#include <stdio.h> |
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|
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/* |
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* Compression+decompression state blocks are |
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* derived from this ``base state'' block. |
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*/ |
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typedef struct |
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{ |
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int rw_mode; /* O_RDONLY for decode, else encode */ |
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int mode; /* operating mode */ |
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tmsize_t rowbytes; /* bytes in a decoded scanline */ |
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uint32_t rowpixels; /* pixels in a scanline */ |
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|
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uint16_t cleanfaxdata; /* CleanFaxData tag */ |
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uint32_t badfaxrun; /* BadFaxRun tag */ |
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uint32_t badfaxlines; /* BadFaxLines tag */ |
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uint32_t groupoptions; /* Group 3/4 options tag */ |
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|
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TIFFVGetMethod vgetparent; /* super-class method */ |
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TIFFVSetMethod vsetparent; /* super-class method */ |
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TIFFPrintMethod printdir; /* super-class method */ |
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} Fax3BaseState; |
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#define Fax3State(tif) ((Fax3BaseState *)(tif)->tif_data) |
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|
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typedef enum |
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{ |
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G3_1D, |
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G3_2D |
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} Ttag; |
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typedef struct |
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{ |
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Fax3BaseState b; |
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|
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/* Decoder state info */ |
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const unsigned char *bitmap; /* bit reversal table */ |
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uint32_t data; /* current i/o byte/word */ |
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int bit; /* current i/o bit in byte */ |
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int EOLcnt; /* count of EOL codes recognized */ |
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TIFFFaxFillFunc fill; /* fill routine */ |
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uint32_t *runs; /* b&w runs for current/previous row */ |
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uint32_t nruns; /* size of the refruns / curruns arrays */ |
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uint32_t *refruns; /* runs for reference line */ |
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uint32_t *curruns; /* runs for current line */ |
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|
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/* Encoder state info */ |
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Ttag tag; /* encoding state */ |
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unsigned char *refline; /* reference line for 2d decoding */ |
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int k; /* #rows left that can be 2d encoded */ |
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int maxk; /* max #rows that can be 2d encoded */ |
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|
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int line; |
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} Fax3CodecState; |
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#define DecoderState(tif) ((Fax3CodecState *)Fax3State(tif)) |
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#define EncoderState(tif) ((Fax3CodecState *)Fax3State(tif)) |
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|
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#define is2DEncoding(sp) (sp->b.groupoptions & GROUP3OPT_2DENCODING) |
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#define isAligned(p, t) ((((size_t)(p)) & (sizeof(t) - 1)) == 0) |
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|
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/* |
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* Group 3 and Group 4 Decoding. |
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*/ |
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|
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/* |
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* These macros glue the TIFF library state to |
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* the state expected by Frank's decoder. |
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*/ |
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#define DECLARE_STATE(tif, sp, mod) \ |
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static const char module[] = mod; \ |
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Fax3CodecState *sp = DecoderState(tif); \ |
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int a0; /* reference element */ \ |
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int lastx = sp->b.rowpixels; /* last element in row */ \ |
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uint32_t BitAcc; /* bit accumulator */ \ |
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int BitsAvail; /* # valid bits in BitAcc */ \ |
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int RunLength; /* length of current run */ \ |
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unsigned char *cp; /* next byte of input data */ \ |
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unsigned char *ep; /* end of input data */ \ |
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uint32_t *pa; /* place to stuff next run */ \ |
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uint32_t *thisrun; /* current row's run array */ \ |
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int EOLcnt; /* # EOL codes recognized */ \ |
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const unsigned char *bitmap = sp->bitmap; /* input data bit reverser */ \ |
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const TIFFFaxTabEnt *TabEnt |
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#define DECLARE_STATE_2D(tif, sp, mod) \ |
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DECLARE_STATE(tif, sp, mod); \ |
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int b1; /* next change on prev line */ \ |
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uint32_t \ |
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*pb /* next run in reference line */ /* \ |
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* Load any state that may be \ |
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* changed during decoding. \ |
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*/ |
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#define CACHE_STATE(tif, sp) \ |
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do \ |
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{ \ |
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BitAcc = sp->data; \ |
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BitsAvail = sp->bit; \ |
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EOLcnt = sp->EOLcnt; \ |
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cp = (unsigned char *)tif->tif_rawcp; \ |
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ep = cp + tif->tif_rawcc; \ |
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} while (0) |
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/* |
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* Save state possibly changed during decoding. |
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*/ |
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#define UNCACHE_STATE(tif, sp) \ |
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do \ |
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{ \ |
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sp->bit = BitsAvail; \ |
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sp->data = BitAcc; \ |
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sp->EOLcnt = EOLcnt; \ |
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tif->tif_rawcc -= (tmsize_t)((uint8_t *)cp - tif->tif_rawcp); \ |
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tif->tif_rawcp = (uint8_t *)cp; \ |
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} while (0) |
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|
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/* |
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* Setup state for decoding a strip. |
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*/ |
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static int Fax3PreDecode(TIFF *tif, uint16_t s) |
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{ |
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Fax3CodecState *sp = DecoderState(tif); |
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|
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(void)s; |
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assert(sp != NULL); |
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sp->bit = 0; /* force initial read */ |
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sp->data = 0; |
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sp->EOLcnt = 0; /* force initial scan for EOL */ |
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/* |
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* Decoder assumes lsb-to-msb bit order. Note that we select |
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* this here rather than in Fax3SetupState so that viewers can |
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* hold the image open, fiddle with the FillOrder tag value, |
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* and then re-decode the image. Otherwise they'd need to close |
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* and open the image to get the state reset. |
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*/ |
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sp->bitmap = |
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TIFFGetBitRevTable(tif->tif_dir.td_fillorder != FILLORDER_LSB2MSB); |
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sp->curruns = sp->runs; |
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if (sp->refruns) |
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{ /* init reference line to white */ |
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sp->refruns = sp->runs + sp->nruns; |
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sp->refruns[0] = (uint32_t)sp->b.rowpixels; |
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sp->refruns[1] = 0; |
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} |
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sp->line = 0; |
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return (1); |
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} |
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|
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/* |
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* Routine for handling various errors/conditions. |
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* Note how they are "glued into the decoder" by |
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* overriding the definitions used by the decoder. |
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*/ |
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|
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static void Fax3Unexpected(const char *module, TIFF *tif, uint32_t line, |
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uint32_t a0) |
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{ |
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TIFFErrorExtR(tif, module, |
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"Bad code word at line %" PRIu32 " of %s %" PRIu32 |
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" (x %" PRIu32 ")", |
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line, isTiled(tif) ? "tile" : "strip", |
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(isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), a0); |
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} |
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#define unexpected(table, a0) Fax3Unexpected(module, tif, sp->line, a0) |
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|
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static void Fax3Extension(const char *module, TIFF *tif, uint32_t line, |
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uint32_t a0) |
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{ |
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TIFFErrorExtR(tif, module, |
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"Uncompressed data (not supported) at line %" PRIu32 |
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" of %s %" PRIu32 " (x %" PRIu32 ")", |
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line, isTiled(tif) ? "tile" : "strip", |
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(isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), a0); |
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} |
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#define extension(a0) Fax3Extension(module, tif, sp->line, a0) |
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|
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static void Fax3BadLength(const char *module, TIFF *tif, uint32_t line, |
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uint32_t a0, uint32_t lastx) |
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{ |
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TIFFWarningExtR(tif, module, |
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"%s at line %" PRIu32 " of %s %" PRIu32 " (got %" PRIu32 |
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", expected %" PRIu32 ")", |
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a0 < lastx ? "Premature EOL" : "Line length mismatch", line, |
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isTiled(tif) ? "tile" : "strip", |
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(isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), a0, |
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lastx); |
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} |
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#define badlength(a0, lastx) Fax3BadLength(module, tif, sp->line, a0, lastx) |
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|
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static void Fax3PrematureEOF(const char *module, TIFF *tif, uint32_t line, |
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uint32_t a0) |
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{ |
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TIFFWarningExtR(tif, module, |
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"Premature EOF at line %" PRIu32 " of %s %" PRIu32 |
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" (x %" PRIu32 ")", |
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line, isTiled(tif) ? "tile" : "strip", |
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(isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), a0); |
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} |
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#define prematureEOF(a0) Fax3PrematureEOF(module, tif, sp->line, a0) |
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|
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#define Nop |
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|
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/** |
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* Decode the requested amount of G3 1D-encoded data. |
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* @param buf destination buffer |
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* @param occ available bytes in destination buffer |
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* @param s number of planes (ignored) |
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* @returns 1 for success, -1 in case of error |
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*/ |
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static int Fax3Decode1D(TIFF *tif, uint8_t *buf, tmsize_t occ, uint16_t s) |
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{ |
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DECLARE_STATE(tif, sp, "Fax3Decode1D"); |
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(void)s; |
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if (occ % sp->b.rowbytes) |
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{ |
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TIFFErrorExtR(tif, module, "Fractional scanlines cannot be read"); |
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return (-1); |
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} |
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CACHE_STATE(tif, sp); |
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thisrun = sp->curruns; |
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while (occ > 0) |
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{ |
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a0 = 0; |
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RunLength = 0; |
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pa = thisrun; |
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#ifdef FAX3_DEBUG |
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printf("\nBitAcc=%08" PRIX32 ", BitsAvail = %d\n", BitAcc, BitsAvail); |
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printf("-------------------- %" PRIu32 "\n", tif->tif_row); |
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fflush(stdout); |
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#endif |
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SYNC_EOL(EOF1D); |
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EXPAND1D(EOF1Da); |
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(*sp->fill)(buf, thisrun, pa, lastx); |
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buf += sp->b.rowbytes; |
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occ -= sp->b.rowbytes; |
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sp->line++; |
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continue; |
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EOF1D: /* premature EOF */ |
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CLEANUP_RUNS(); |
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EOF1Da: /* premature EOF */ |
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(*sp->fill)(buf, thisrun, pa, lastx); |
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UNCACHE_STATE(tif, sp); |
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return (-1); |
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} |
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UNCACHE_STATE(tif, sp); |
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return (1); |
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} |
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|
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#define SWAP(t, a, b) \ |
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{ \ |
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t x; \ |
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x = (a); \ |
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(a) = (b); \ |
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(b) = x; \ |
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} |
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/* |
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* Decode the requested amount of G3 2D-encoded data. |
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*/ |
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static int Fax3Decode2D(TIFF *tif, uint8_t *buf, tmsize_t occ, uint16_t s) |
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{ |
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DECLARE_STATE_2D(tif, sp, "Fax3Decode2D"); |
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int is1D; /* current line is 1d/2d-encoded */ |
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(void)s; |
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if (occ % sp->b.rowbytes) |
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{ |
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TIFFErrorExtR(tif, module, "Fractional scanlines cannot be read"); |
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return (-1); |
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} |
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CACHE_STATE(tif, sp); |
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while (occ > 0) |
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{ |
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a0 = 0; |
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RunLength = 0; |
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pa = thisrun = sp->curruns; |
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#ifdef FAX3_DEBUG |
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printf("\nBitAcc=%08" PRIX32 ", BitsAvail = %d EOLcnt = %d", BitAcc, |
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BitsAvail, EOLcnt); |
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#endif |
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SYNC_EOL(EOF2D); |
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NeedBits8(1, EOF2D); |
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is1D = GetBits(1); /* 1D/2D-encoding tag bit */ |
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ClrBits(1); |
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#ifdef FAX3_DEBUG |
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printf(" %s\n-------------------- %" PRIu32 "\n", is1D ? "1D" : "2D", |
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tif->tif_row); |
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fflush(stdout); |
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#endif |
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pb = sp->refruns; |
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b1 = *pb++; |
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if (is1D) |
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EXPAND1D(EOF2Da); |
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else |
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EXPAND2D(EOF2Da); |
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(*sp->fill)(buf, thisrun, pa, lastx); |
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if (pa < thisrun + sp->nruns) |
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{ |
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SETVALUE(0); /* imaginary change for reference */ |
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} |
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SWAP(uint32_t *, sp->curruns, sp->refruns); |
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buf += sp->b.rowbytes; |
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occ -= sp->b.rowbytes; |
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sp->line++; |
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continue; |
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EOF2D: /* premature EOF */ |
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CLEANUP_RUNS(); |
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EOF2Da: /* premature EOF */ |
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(*sp->fill)(buf, thisrun, pa, lastx); |
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UNCACHE_STATE(tif, sp); |
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return (-1); |
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} |
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UNCACHE_STATE(tif, sp); |
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return (1); |
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} |
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#undef SWAP |
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|
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#define FILL(n, cp) \ |
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for (int32_t ifill = 0; ifill < (n); ++ifill) \ |
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{ \ |
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(cp)[ifill] = 0xff; \ |
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} \ |
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(cp) += (n); |
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|
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#define ZERO(n, cp) \ |
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for (int32_t izero = 0; izero < (n); ++izero) \ |
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{ \ |
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(cp)[izero] = 0; \ |
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} \ |
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(cp) += (n); |
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|
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/* |
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* Bit-fill a row according to the white/black |
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* runs generated during G3/G4 decoding. |
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*/ |
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void _TIFFFax3fillruns(unsigned char *buf, uint32_t *runs, uint32_t *erun, |
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uint32_t lastx) |
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{ |
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static const unsigned char _fillmasks[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0, |
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0xf8, 0xfc, 0xfe, 0xff}; |
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unsigned char *cp; |
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uint32_t x, bx, run; |
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int32_t n, nw; |
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int64_t *lp; |
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|
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if ((erun - runs) & 1) |
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*erun++ = 0; |
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x = 0; |
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for (; runs < erun; runs += 2) |
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{ |
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run = runs[0]; |
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if (x + run > lastx || run > lastx) |
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run = runs[0] = (uint32_t)(lastx - x); |
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if (run) |
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{ |
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cp = buf + (x >> 3); |
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bx = x & 7; |
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if (run > 8 - bx) |
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{ |
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if (bx) |
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{ /* align to byte boundary */ |
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*cp++ &= 0xff << (8 - bx); |
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run -= 8 - bx; |
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} |
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if ((n = run >> 3) != 0) |
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{ /* multiple bytes to fill */ |
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if ((n / sizeof(int64_t)) > 1) |
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{ |
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/* |
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* Align to int64_tword boundary and fill. |
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*/ |
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for (; n && !isAligned(cp, int64_t); n--) |
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*cp++ = 0x00; |
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lp = (int64_t *)cp; |
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nw = (int32_t)(n / sizeof(int64_t)); |
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n -= nw * sizeof(int64_t); |
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do |
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{ |
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*lp++ = 0L; |
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} while (--nw); |
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cp = (unsigned char *)lp; |
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} |
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ZERO(n, cp); |
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run &= 7; |
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} |
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if (run) |
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cp[0] &= 0xff >> run; |
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} |
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else |
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cp[0] &= ~(_fillmasks[run] >> bx); |
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x += runs[0]; |
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} |
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run = runs[1]; |
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if (x + run > lastx || run > lastx) |
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run = runs[1] = lastx - x; |
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if (run) |
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{ |
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cp = buf + (x >> 3); |
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bx = x & 7; |
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if (run > 8 - bx) |
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{ |
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if (bx) |
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{ /* align to byte boundary */ |
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*cp++ |= 0xff >> bx; |
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run -= 8 - bx; |
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} |
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if ((n = run >> 3) != 0) |
|
{ /* multiple bytes to fill */ |
|
if ((n / sizeof(int64_t)) > 1) |
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{ |
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/* |
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* Align to int64_t boundary and fill. |
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*/ |
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for (; n && !isAligned(cp, int64_t); n--) |
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*cp++ = 0xff; |
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lp = (int64_t *)cp; |
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nw = (int32_t)(n / sizeof(int64_t)); |
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n -= nw * sizeof(int64_t); |
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do |
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{ |
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*lp++ = -1L; |
|
} while (--nw); |
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cp = (unsigned char *)lp; |
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} |
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FILL(n, cp); |
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run &= 7; |
|
} |
|
/* Explicit 0xff masking to make icc -check=conversions happy */ |
|
if (run) |
|
cp[0] = (unsigned char)((cp[0] | (0xff00 >> run)) & 0xff); |
|
} |
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else |
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cp[0] |= _fillmasks[run] >> bx; |
|
x += runs[1]; |
|
} |
|
} |
|
assert(x == lastx); |
|
} |
|
#undef ZERO |
|
#undef FILL |
|
|
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static int Fax3FixupTags(TIFF *tif) |
|
{ |
|
(void)tif; |
|
return (1); |
|
} |
|
|
|
/* |
|
* Setup G3/G4-related compression/decompression state |
|
* before data is processed. This routine is called once |
|
* per image -- it sets up different state based on whether |
|
* or not decoding or encoding is being done and whether |
|
* 1D- or 2D-encoded data is involved. |
|
*/ |
|
static int Fax3SetupState(TIFF *tif) |
|
{ |
|
static const char module[] = "Fax3SetupState"; |
|
TIFFDirectory *td = &tif->tif_dir; |
|
Fax3BaseState *sp = Fax3State(tif); |
|
int needsRefLine; |
|
Fax3CodecState *dsp = (Fax3CodecState *)Fax3State(tif); |
|
tmsize_t rowbytes; |
|
uint32_t rowpixels; |
|
|
|
if (td->td_bitspersample != 1) |
|
{ |
|
TIFFErrorExtR(tif, module, |
|
"Bits/sample must be 1 for Group 3/4 encoding/decoding"); |
|
return (0); |
|
} |
|
/* |
|
* Calculate the scanline/tile widths. |
|
*/ |
|
if (isTiled(tif)) |
|
{ |
|
rowbytes = TIFFTileRowSize(tif); |
|
rowpixels = td->td_tilewidth; |
|
} |
|
else |
|
{ |
|
rowbytes = TIFFScanlineSize(tif); |
|
rowpixels = td->td_imagewidth; |
|
} |
|
if ((int64_t)rowbytes < ((int64_t)rowpixels + 7) / 8) |
|
{ |
|
TIFFErrorExtR(tif, module, |
|
"Inconsistent number of bytes per row : rowbytes=%" PRId64 |
|
" rowpixels=%" PRIu32, |
|
(int64_t)rowbytes, rowpixels); |
|
return (0); |
|
} |
|
sp->rowbytes = rowbytes; |
|
sp->rowpixels = rowpixels; |
|
/* |
|
* Allocate any additional space required for decoding/encoding. |
|
*/ |
|
needsRefLine = ((sp->groupoptions & GROUP3OPT_2DENCODING) || |
|
td->td_compression == COMPRESSION_CCITTFAX4); |
|
|
|
/* |
|
Assure that allocation computations do not overflow. |
|
|
|
TIFFroundup and TIFFSafeMultiply return zero on integer overflow |
|
*/ |
|
dsp->runs = (uint32_t *)NULL; |
|
dsp->nruns = TIFFroundup_32(rowpixels + 1, 32); |
|
if (needsRefLine) |
|
{ |
|
dsp->nruns = TIFFSafeMultiply(uint32_t, dsp->nruns, 2); |
|
} |
|
if ((dsp->nruns == 0) || (TIFFSafeMultiply(uint32_t, dsp->nruns, 2) == 0)) |
|
{ |
|
TIFFErrorExtR(tif, tif->tif_name, |
|
"Row pixels integer overflow (rowpixels %" PRIu32 ")", |
|
rowpixels); |
|
return (0); |
|
} |
|
dsp->runs = (uint32_t *)_TIFFCheckMalloc( |
|
tif, TIFFSafeMultiply(uint32_t, dsp->nruns, 2), sizeof(uint32_t), |
|
"for Group 3/4 run arrays"); |
|
if (dsp->runs == NULL) |
|
return (0); |
|
memset(dsp->runs, 0, |
|
TIFFSafeMultiply(uint32_t, dsp->nruns, 2) * sizeof(uint32_t)); |
|
dsp->curruns = dsp->runs; |
|
if (needsRefLine) |
|
dsp->refruns = dsp->runs + dsp->nruns; |
|
else |
|
dsp->refruns = NULL; |
|
if (td->td_compression == COMPRESSION_CCITTFAX3 && is2DEncoding(dsp)) |
|
{ /* NB: default is 1D routine */ |
|
tif->tif_decoderow = Fax3Decode2D; |
|
tif->tif_decodestrip = Fax3Decode2D; |
|
tif->tif_decodetile = Fax3Decode2D; |
|
} |
|
|
|
if (needsRefLine) |
|
{ /* 2d encoding */ |
|
Fax3CodecState *esp = EncoderState(tif); |
|
/* |
|
* 2d encoding requires a scanline |
|
* buffer for the ``reference line''; the |
|
* scanline against which delta encoding |
|
* is referenced. The reference line must |
|
* be initialized to be ``white'' (done elsewhere). |
|
*/ |
|
esp->refline = (unsigned char *)_TIFFmallocExt(tif, rowbytes); |
|
if (esp->refline == NULL) |
|
{ |
|
TIFFErrorExtR(tif, module, "No space for Group 3/4 reference line"); |
|
return (0); |
|
} |
|
} |
|
else /* 1d encoding */ |
|
EncoderState(tif)->refline = NULL; |
|
|
|
return (1); |
|
} |
|
|
|
/* |
|
* CCITT Group 3 FAX Encoding. |
|
*/ |
|
|
|
#define Fax3FlushBits(tif, sp) \ |
|
{ \ |
|
if ((tif)->tif_rawcc >= (tif)->tif_rawdatasize) \ |
|
{ \ |
|
if (!TIFFFlushData1(tif)) \ |
|
return 0; \ |
|
} \ |
|
*(tif)->tif_rawcp++ = (uint8_t)(sp)->data; \ |
|
(tif)->tif_rawcc++; \ |
|
(sp)->data = 0, (sp)->bit = 8; \ |
|
} |
|
#define _FlushBits(tif) \ |
|
{ \ |
|
if ((tif)->tif_rawcc >= (tif)->tif_rawdatasize) \ |
|
{ \ |
|
if (!TIFFFlushData1(tif)) \ |
|
return 0; \ |
|
} \ |
|
*(tif)->tif_rawcp++ = (uint8_t)data; \ |
|
(tif)->tif_rawcc++; \ |
|
data = 0, bit = 8; \ |
|
} |
|
static const int _msbmask[9] = {0x00, 0x01, 0x03, 0x07, 0x0f, |
|
0x1f, 0x3f, 0x7f, 0xff}; |
|
#define _PutBits(tif, bits, length) \ |
|
{ \ |
|
while (length > bit) \ |
|
{ \ |
|
data |= bits >> (length - bit); \ |
|
length -= bit; \ |
|
_FlushBits(tif); \ |
|
} \ |
|
assert(length < 9); \ |
|
data |= (bits & _msbmask[length]) << (bit - length); \ |
|
bit -= length; \ |
|
if (bit == 0) \ |
|
_FlushBits(tif); \ |
|
} |
|
|
|
/* |
|
* Write a variable-length bit-value to |
|
* the output stream. Values are |
|
* assumed to be at most 16 bits. |
|
*/ |
|
static int Fax3PutBits(TIFF *tif, unsigned int bits, unsigned int length) |
|
{ |
|
Fax3CodecState *sp = EncoderState(tif); |
|
unsigned int bit = sp->bit; |
|
int data = sp->data; |
|
|
|
_PutBits(tif, bits, length); |
|
|
|
sp->data = data; |
|
sp->bit = bit; |
|
return 1; |
|
} |
|
|
|
/* |
|
* Write a code to the output stream. |
|
*/ |
|
#define putcode(tif, te) Fax3PutBits(tif, (te)->code, (te)->length) |
|
|
|
#ifdef FAX3_DEBUG |
|
#define DEBUG_COLOR(w) (tab == TIFFFaxWhiteCodes ? w "W" : w "B") |
|
#define DEBUG_PRINT(what, len) \ |
|
{ \ |
|
int t; \ |
|
printf("%08" PRIX32 "/%-2d: %s%5d\t", data, bit, DEBUG_COLOR(what), \ |
|
len); \ |
|
for (t = length - 1; t >= 0; t--) \ |
|
putchar(code & (1 << t) ? '1' : '0'); \ |
|
putchar('\n'); \ |
|
} |
|
#endif |
|
|
|
/* |
|
* Write the sequence of codes that describes |
|
* the specified span of zero's or one's. The |
|
* appropriate table that holds the make-up and |
|
* terminating codes is supplied. |
|
*/ |
|
static int putspan(TIFF *tif, int32_t span, const tableentry *tab) |
|
{ |
|
Fax3CodecState *sp = EncoderState(tif); |
|
unsigned int bit = sp->bit; |
|
int data = sp->data; |
|
unsigned int code, length; |
|
|
|
while (span >= 2624) |
|
{ |
|
const tableentry *te = &tab[63 + (2560 >> 6)]; |
|
code = te->code; |
|
length = te->length; |
|
#ifdef FAX3_DEBUG |
|
DEBUG_PRINT("MakeUp", te->runlen); |
|
#endif |
|
_PutBits(tif, code, length); |
|
span -= te->runlen; |
|
} |
|
if (span >= 64) |
|
{ |
|
const tableentry *te = &tab[63 + (span >> 6)]; |
|
assert(te->runlen == 64 * (span >> 6)); |
|
code = te->code; |
|
length = te->length; |
|
#ifdef FAX3_DEBUG |
|
DEBUG_PRINT("MakeUp", te->runlen); |
|
#endif |
|
_PutBits(tif, code, length); |
|
span -= te->runlen; |
|
} |
|
code = tab[span].code; |
|
length = tab[span].length; |
|
#ifdef FAX3_DEBUG |
|
DEBUG_PRINT(" Term", tab[span].runlen); |
|
#endif |
|
_PutBits(tif, code, length); |
|
|
|
sp->data = data; |
|
sp->bit = bit; |
|
|
|
return 1; |
|
} |
|
|
|
/* |
|
* Write an EOL code to the output stream. The zero-fill |
|
* logic for byte-aligning encoded scanlines is handled |
|
* here. We also handle writing the tag bit for the next |
|
* scanline when doing 2d encoding. |
|
*/ |
|
static int Fax3PutEOL(TIFF *tif) |
|
{ |
|
Fax3CodecState *sp = EncoderState(tif); |
|
unsigned int bit = sp->bit; |
|
int data = sp->data; |
|
unsigned int code, length, tparm; |
|
|
|
if (sp->b.groupoptions & GROUP3OPT_FILLBITS) |
|
{ |
|
/* |
|
* Force bit alignment so EOL will terminate on |
|
* a byte boundary. That is, force the bit alignment |
|
* to 16-12 = 4 before putting out the EOL code. |
|
*/ |
|
int align = 8 - 4; |
|
if (align != sp->bit) |
|
{ |
|
if (align > sp->bit) |
|
align = sp->bit + (8 - align); |
|
else |
|
align = sp->bit - align; |
|
tparm = align; |
|
_PutBits(tif, 0, tparm); |
|
} |
|
} |
|
code = EOL; |
|
length = 12; |
|
if (is2DEncoding(sp)) |
|
{ |
|
code = (code << 1) | (sp->tag == G3_1D); |
|
length++; |
|
} |
|
_PutBits(tif, code, length); |
|
|
|
sp->data = data; |
|
sp->bit = bit; |
|
|
|
return 1; |
|
} |
|
|
|
/* |
|
* Reset encoding state at the start of a strip. |
|
*/ |
|
static int Fax3PreEncode(TIFF *tif, uint16_t s) |
|
{ |
|
Fax3CodecState *sp = EncoderState(tif); |
|
|
|
(void)s; |
|
assert(sp != NULL); |
|
sp->bit = 8; |
|
sp->data = 0; |
|
sp->tag = G3_1D; |
|
/* |
|
* This is necessary for Group 4; otherwise it isn't |
|
* needed because the first scanline of each strip ends |
|
* up being copied into the refline. |
|
*/ |
|
if (sp->refline) |
|
_TIFFmemset(sp->refline, 0x00, sp->b.rowbytes); |
|
if (is2DEncoding(sp)) |
|
{ |
|
float res = tif->tif_dir.td_yresolution; |
|
/* |
|
* The CCITT spec says that when doing 2d encoding, you |
|
* should only do it on K consecutive scanlines, where K |
|
* depends on the resolution of the image being encoded |
|
* (2 for <= 200 lpi, 4 for > 200 lpi). Since the directory |
|
* code initializes td_yresolution to 0, this code will |
|
* select a K of 2 unless the YResolution tag is set |
|
* appropriately. (Note also that we fudge a little here |
|
* and use 150 lpi to avoid problems with units conversion.) |
|
*/ |
|
if (tif->tif_dir.td_resolutionunit == RESUNIT_CENTIMETER) |
|
res *= 2.54f; /* convert to inches */ |
|
sp->maxk = (res > 150 ? 4 : 2); |
|
sp->k = sp->maxk - 1; |
|
} |
|
else |
|
sp->k = sp->maxk = 0; |
|
sp->line = 0; |
|
return (1); |
|
} |
|
|
|
static const unsigned char zeroruns[256] = { |
|
8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, /* 0x00 - 0x0f */ |
|
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0x10 - 0x1f */ |
|
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x20 - 0x2f */ |
|
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x30 - 0x3f */ |
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x40 - 0x4f */ |
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x50 - 0x5f */ |
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x60 - 0x6f */ |
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x70 - 0x7f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 - 0x8f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 - 0x9f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 - 0xaf */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 - 0xbf */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 - 0xcf */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 - 0xdf */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 - 0xef */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xf0 - 0xff */ |
|
}; |
|
static const unsigned char oneruns[256] = { |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 - 0x0f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 - 0x1f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 - 0x2f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x30 - 0x3f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x40 - 0x4f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 - 0x5f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60 - 0x6f */ |
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 - 0x7f */ |
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x80 - 0x8f */ |
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x90 - 0x9f */ |
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xa0 - 0xaf */ |
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xb0 - 0xbf */ |
|
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0xc0 - 0xcf */ |
|
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0xd0 - 0xdf */ |
|
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0xe0 - 0xef */ |
|
4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 8, /* 0xf0 - 0xff */ |
|
}; |
|
|
|
/* |
|
* Find a span of ones or zeros using the supplied |
|
* table. The ``base'' of the bit string is supplied |
|
* along with the start+end bit indices. |
|
*/ |
|
static inline int32_t find0span(unsigned char *bp, int32_t bs, int32_t be) |
|
{ |
|
int32_t bits = be - bs; |
|
int32_t n, span; |
|
|
|
bp += bs >> 3; |
|
/* |
|
* Check partial byte on lhs. |
|
*/ |
|
if (bits > 0 && (n = (bs & 7)) != 0) |
|
{ |
|
span = zeroruns[(*bp << n) & 0xff]; |
|
if (span > 8 - n) /* table value too generous */ |
|
span = 8 - n; |
|
if (span > bits) /* constrain span to bit range */ |
|
span = bits; |
|
if (n + span < 8) /* doesn't extend to edge of byte */ |
|
return (span); |
|
bits -= span; |
|
bp++; |
|
} |
|
else |
|
span = 0; |
|
if (bits >= (int32_t)(2 * 8 * sizeof(int64_t))) |
|
{ |
|
int64_t *lp; |
|
/* |
|
* Align to int64_t boundary and check int64_t words. |
|
*/ |
|
while (!isAligned(bp, int64_t)) |
|
{ |
|
if (*bp != 0x00) |
|
return (span + zeroruns[*bp]); |
|
span += 8; |
|
bits -= 8; |
|
bp++; |
|
} |
|
lp = (int64_t *)bp; |
|
while ((bits >= (int32_t)(8 * sizeof(int64_t))) && (0 == *lp)) |
|
{ |
|
span += 8 * sizeof(int64_t); |
|
bits -= 8 * sizeof(int64_t); |
|
lp++; |
|
} |
|
bp = (unsigned char *)lp; |
|
} |
|
/* |
|
* Scan full bytes for all 0's. |
|
*/ |
|
while (bits >= 8) |
|
{ |
|
if (*bp != 0x00) /* end of run */ |
|
return (span + zeroruns[*bp]); |
|
span += 8; |
|
bits -= 8; |
|
bp++; |
|
} |
|
/* |
|
* Check partial byte on rhs. |
|
*/ |
|
if (bits > 0) |
|
{ |
|
n = zeroruns[*bp]; |
|
span += (n > bits ? bits : n); |
|
} |
|
return (span); |
|
} |
|
|
|
static inline int32_t find1span(unsigned char *bp, int32_t bs, int32_t be) |
|
{ |
|
int32_t bits = be - bs; |
|
int32_t n, span; |
|
|
|
bp += bs >> 3; |
|
/* |
|
* Check partial byte on lhs. |
|
*/ |
|
if (bits > 0 && (n = (bs & 7)) != 0) |
|
{ |
|
span = oneruns[(*bp << n) & 0xff]; |
|
if (span > 8 - n) /* table value too generous */ |
|
span = 8 - n; |
|
if (span > bits) /* constrain span to bit range */ |
|
span = bits; |
|
if (n + span < 8) /* doesn't extend to edge of byte */ |
|
return (span); |
|
bits -= span; |
|
bp++; |
|
} |
|
else |
|
span = 0; |
|
if (bits >= (int32_t)(2 * 8 * sizeof(int64_t))) |
|
{ |
|
int64_t *lp; |
|
/* |
|
* Align to int64_t boundary and check int64_t words. |
|
*/ |
|
while (!isAligned(bp, int64_t)) |
|
{ |
|
if (*bp != 0xff) |
|
return (span + oneruns[*bp]); |
|
span += 8; |
|
bits -= 8; |
|
bp++; |
|
} |
|
lp = (int64_t *)bp; |
|
while ((bits >= (int32_t)(8 * sizeof(int64_t))) && |
|
(~((uint64_t)0) == (uint64_t)*lp)) |
|
{ |
|
span += 8 * sizeof(int64_t); |
|
bits -= 8 * sizeof(int64_t); |
|
lp++; |
|
} |
|
bp = (unsigned char *)lp; |
|
} |
|
/* |
|
* Scan full bytes for all 1's. |
|
*/ |
|
while (bits >= 8) |
|
{ |
|
if (*bp != 0xff) /* end of run */ |
|
return (span + oneruns[*bp]); |
|
span += 8; |
|
bits -= 8; |
|
bp++; |
|
} |
|
/* |
|
* Check partial byte on rhs. |
|
*/ |
|
if (bits > 0) |
|
{ |
|
n = oneruns[*bp]; |
|
span += (n > bits ? bits : n); |
|
} |
|
return (span); |
|
} |
|
|
|
/* |
|
* Return the offset of the next bit in the range |
|
* [bs..be] that is different from the specified |
|
* color. The end, be, is returned if no such bit |
|
* exists. |
|
*/ |
|
#define finddiff(_cp, _bs, _be, _color) \ |
|
(_bs + (_color ? find1span(_cp, _bs, _be) : find0span(_cp, _bs, _be))) |
|
/* |
|
* Like finddiff, but also check the starting bit |
|
* against the end in case start > end. |
|
*/ |
|
#define finddiff2(_cp, _bs, _be, _color) \ |
|
(_bs < _be ? finddiff(_cp, _bs, _be, _color) : _be) |
|
|
|
/* |
|
* 1d-encode a row of pixels. The encoding is |
|
* a sequence of all-white or all-black spans |
|
* of pixels encoded with Huffman codes. |
|
*/ |
|
static int Fax3Encode1DRow(TIFF *tif, unsigned char *bp, uint32_t bits) |
|
{ |
|
Fax3CodecState *sp = EncoderState(tif); |
|
int32_t span; |
|
uint32_t bs = 0; |
|
|
|
for (;;) |
|
{ |
|
span = find0span(bp, bs, bits); /* white span */ |
|
if (!putspan(tif, span, TIFFFaxWhiteCodes)) |
|
return 0; |
|
bs += span; |
|
if (bs >= bits) |
|
break; |
|
span = find1span(bp, bs, bits); /* black span */ |
|
if (!putspan(tif, span, TIFFFaxBlackCodes)) |
|
return 0; |
|
bs += span; |
|
if (bs >= bits) |
|
break; |
|
} |
|
if (sp->b.mode & (FAXMODE_BYTEALIGN | FAXMODE_WORDALIGN)) |
|
{ |
|
if (sp->bit != 8) /* byte-align */ |
|
Fax3FlushBits(tif, sp); |
|
if ((sp->b.mode & FAXMODE_WORDALIGN) && |
|
!isAligned(tif->tif_rawcp, uint16_t)) |
|
Fax3FlushBits(tif, sp); |
|
} |
|
return (1); |
|
} |
|
|
|
static const tableentry horizcode = {3, 0x1, 0}; /* 001 */ |
|
static const tableentry passcode = {4, 0x1, 0}; /* 0001 */ |
|
static const tableentry vcodes[7] = { |
|
{7, 0x03, 0}, /* 0000 011 */ |
|
{6, 0x03, 0}, /* 0000 11 */ |
|
{3, 0x03, 0}, /* 011 */ |
|
{1, 0x1, 0}, /* 1 */ |
|
{3, 0x2, 0}, /* 010 */ |
|
{6, 0x02, 0}, /* 0000 10 */ |
|
{7, 0x02, 0} /* 0000 010 */ |
|
}; |
|
|
|
/* |
|
* 2d-encode a row of pixels. Consult the CCITT |
|
* documentation for the algorithm. |
|
*/ |
|
static int Fax3Encode2DRow(TIFF *tif, unsigned char *bp, unsigned char *rp, |
|
uint32_t bits) |
|
{ |
|
#define PIXEL(buf, ix) ((((buf)[(ix) >> 3]) >> (7 - ((ix)&7))) & 1) |
|
uint32_t a0 = 0; |
|
uint32_t a1 = (PIXEL(bp, 0) != 0 ? 0 : finddiff(bp, 0, bits, 0)); |
|
uint32_t b1 = (PIXEL(rp, 0) != 0 ? 0 : finddiff(rp, 0, bits, 0)); |
|
uint32_t a2, b2; |
|
|
|
for (;;) |
|
{ |
|
b2 = finddiff2(rp, b1, bits, PIXEL(rp, b1)); |
|
if (b2 >= a1) |
|
{ |
|
/* Naive computation triggers |
|
* -fsanitize=undefined,unsigned-integer-overflow */ |
|
/* although it is correct unless the difference between both is < 31 |
|
* bit */ |
|
/* int32_t d = b1 - a1; */ |
|
int32_t d = (b1 >= a1 && b1 - a1 <= 3U) ? (int32_t)(b1 - a1) |
|
: (b1 < a1 && a1 - b1 <= 3U) ? -(int32_t)(a1 - b1) |
|
: 0x7FFFFFFF; |
|
if (!(-3 <= d && d <= 3)) |
|
{ /* horizontal mode */ |
|
a2 = finddiff2(bp, a1, bits, PIXEL(bp, a1)); |
|
if (!putcode(tif, &horizcode)) |
|
return 0; |
|
if (a0 + a1 == 0 || PIXEL(bp, a0) == 0) |
|
{ |
|
if (!putspan(tif, a1 - a0, TIFFFaxWhiteCodes)) |
|
return 0; |
|
if (!putspan(tif, a2 - a1, TIFFFaxBlackCodes)) |
|
return 0; |
|
} |
|
else |
|
{ |
|
if (!putspan(tif, a1 - a0, TIFFFaxBlackCodes)) |
|
return 0; |
|
if (!putspan(tif, a2 - a1, TIFFFaxWhiteCodes)) |
|
return 0; |
|
} |
|
a0 = a2; |
|
} |
|
else |
|
{ /* vertical mode */ |
|
if (!putcode(tif, &vcodes[d + 3])) |
|
return 0; |
|
a0 = a1; |
|
} |
|
} |
|
else |
|
{ /* pass mode */ |
|
if (!putcode(tif, &passcode)) |
|
return 0; |
|
a0 = b2; |
|
} |
|
if (a0 >= bits) |
|
break; |
|
a1 = finddiff(bp, a0, bits, PIXEL(bp, a0)); |
|
b1 = finddiff(rp, a0, bits, !PIXEL(bp, a0)); |
|
b1 = finddiff(rp, b1, bits, PIXEL(bp, a0)); |
|
} |
|
return (1); |
|
#undef PIXEL |
|
} |
|
|
|
/* |
|
* Encode a buffer of pixels. |
|
*/ |
|
static int Fax3Encode(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s) |
|
{ |
|
static const char module[] = "Fax3Encode"; |
|
Fax3CodecState *sp = EncoderState(tif); |
|
(void)s; |
|
if (cc % sp->b.rowbytes) |
|
{ |
|
TIFFErrorExtR(tif, module, "Fractional scanlines cannot be written"); |
|
return (0); |
|
} |
|
while (cc > 0) |
|
{ |
|
if ((sp->b.mode & FAXMODE_NOEOL) == 0) |
|
{ |
|
if (!Fax3PutEOL(tif)) |
|
return 0; |
|
} |
|
if (is2DEncoding(sp)) |
|
{ |
|
if (sp->tag == G3_1D) |
|
{ |
|
if (!Fax3Encode1DRow(tif, bp, sp->b.rowpixels)) |
|
return (0); |
|
sp->tag = G3_2D; |
|
} |
|
else |
|
{ |
|
if (!Fax3Encode2DRow(tif, bp, sp->refline, sp->b.rowpixels)) |
|
return (0); |
|
sp->k--; |
|
} |
|
if (sp->k == 0) |
|
{ |
|
sp->tag = G3_1D; |
|
sp->k = sp->maxk - 1; |
|
} |
|
else |
|
_TIFFmemcpy(sp->refline, bp, sp->b.rowbytes); |
|
} |
|
else |
|
{ |
|
if (!Fax3Encode1DRow(tif, bp, sp->b.rowpixels)) |
|
return (0); |
|
} |
|
bp += sp->b.rowbytes; |
|
cc -= sp->b.rowbytes; |
|
} |
|
return (1); |
|
} |
|
|
|
static int Fax3PostEncode(TIFF *tif) |
|
{ |
|
Fax3CodecState *sp = EncoderState(tif); |
|
|
|
if (sp->bit != 8) |
|
Fax3FlushBits(tif, sp); |
|
return (1); |
|
} |
|
|
|
static int _Fax3Close(TIFF *tif) |
|
{ |
|
if ((Fax3State(tif)->mode & FAXMODE_NORTC) == 0 && tif->tif_rawcp) |
|
{ |
|
Fax3CodecState *sp = EncoderState(tif); |
|
unsigned int code = EOL; |
|
unsigned int length = 12; |
|
int i; |
|
|
|
if (is2DEncoding(sp)) |
|
{ |
|
code = (code << 1) | (sp->tag == G3_1D); |
|
length++; |
|
} |
|
for (i = 0; i < 6; i++) |
|
Fax3PutBits(tif, code, length); |
|
Fax3FlushBits(tif, sp); |
|
} |
|
return 1; |
|
} |
|
|
|
static void Fax3Close(TIFF *tif) { _Fax3Close(tif); } |
|
|
|
static void Fax3Cleanup(TIFF *tif) |
|
{ |
|
Fax3CodecState *sp = DecoderState(tif); |
|
|
|
assert(sp != 0); |
|
|
|
tif->tif_tagmethods.vgetfield = sp->b.vgetparent; |
|
tif->tif_tagmethods.vsetfield = sp->b.vsetparent; |
|
tif->tif_tagmethods.printdir = sp->b.printdir; |
|
|
|
if (sp->runs) |
|
_TIFFfreeExt(tif, sp->runs); |
|
if (sp->refline) |
|
_TIFFfreeExt(tif, sp->refline); |
|
|
|
_TIFFfreeExt(tif, tif->tif_data); |
|
tif->tif_data = NULL; |
|
|
|
_TIFFSetDefaultCompressionState(tif); |
|
} |
|
|
|
#define FIELD_BADFAXLINES (FIELD_CODEC + 0) |
|
#define FIELD_CLEANFAXDATA (FIELD_CODEC + 1) |
|
#define FIELD_BADFAXRUN (FIELD_CODEC + 2) |
|
|
|
#define FIELD_OPTIONS (FIELD_CODEC + 7) |
|
|
|
static const TIFFField faxFields[] = { |
|
{TIFFTAG_FAXMODE, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, TIFF_SETGET_UNDEFINED, |
|
FIELD_PSEUDO, FALSE, FALSE, "FaxMode", NULL}, |
|
{TIFFTAG_FAXFILLFUNC, 0, 0, TIFF_ANY, 0, TIFF_SETGET_OTHER, |
|
TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, FALSE, FALSE, "FaxFillFunc", NULL}, |
|
{TIFFTAG_BADFAXLINES, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, |
|
TIFF_SETGET_UINT32, FIELD_BADFAXLINES, TRUE, FALSE, "BadFaxLines", NULL}, |
|
{TIFFTAG_CLEANFAXDATA, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, |
|
TIFF_SETGET_UINT16, FIELD_CLEANFAXDATA, TRUE, FALSE, "CleanFaxData", NULL}, |
|
{TIFFTAG_CONSECUTIVEBADFAXLINES, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, |
|
TIFF_SETGET_UINT32, FIELD_BADFAXRUN, TRUE, FALSE, "ConsecutiveBadFaxLines", |
|
NULL}}; |
|
static const TIFFField fax3Fields[] = { |
|
{TIFFTAG_GROUP3OPTIONS, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, |
|
TIFF_SETGET_UINT32, FIELD_OPTIONS, FALSE, FALSE, "Group3Options", NULL}, |
|
}; |
|
static const TIFFField fax4Fields[] = { |
|
{TIFFTAG_GROUP4OPTIONS, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, |
|
TIFF_SETGET_UINT32, FIELD_OPTIONS, FALSE, FALSE, "Group4Options", NULL}, |
|
}; |
|
|
|
static int Fax3VSetField(TIFF *tif, uint32_t tag, va_list ap) |
|
{ |
|
Fax3BaseState *sp = Fax3State(tif); |
|
const TIFFField *fip; |
|
|
|
assert(sp != 0); |
|
assert(sp->vsetparent != 0); |
|
|
|
switch (tag) |
|
{ |
|
case TIFFTAG_FAXMODE: |
|
sp->mode = (int)va_arg(ap, int); |
|
return 1; /* NB: pseudo tag */ |
|
case TIFFTAG_FAXFILLFUNC: |
|
DecoderState(tif)->fill = va_arg(ap, TIFFFaxFillFunc); |
|
return 1; /* NB: pseudo tag */ |
|
case TIFFTAG_GROUP3OPTIONS: |
|
/* XXX: avoid reading options if compression mismatches. */ |
|
if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX3) |
|
sp->groupoptions = (uint32_t)va_arg(ap, uint32_t); |
|
break; |
|
case TIFFTAG_GROUP4OPTIONS: |
|
/* XXX: avoid reading options if compression mismatches. */ |
|
if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX4) |
|
sp->groupoptions = (uint32_t)va_arg(ap, uint32_t); |
|
break; |
|
case TIFFTAG_BADFAXLINES: |
|
sp->badfaxlines = (uint32_t)va_arg(ap, uint32_t); |
|
break; |
|
case TIFFTAG_CLEANFAXDATA: |
|
sp->cleanfaxdata = (uint16_t)va_arg(ap, uint16_vap); |
|
break; |
|
case TIFFTAG_CONSECUTIVEBADFAXLINES: |
|
sp->badfaxrun = (uint32_t)va_arg(ap, uint32_t); |
|
break; |
|
default: |
|
return (*sp->vsetparent)(tif, tag, ap); |
|
} |
|
|
|
if ((fip = TIFFFieldWithTag(tif, tag)) != NULL) |
|
TIFFSetFieldBit(tif, fip->field_bit); |
|
else |
|
return 0; |
|
|
|
tif->tif_flags |= TIFF_DIRTYDIRECT; |
|
return 1; |
|
} |
|
|
|
static int Fax3VGetField(TIFF *tif, uint32_t tag, va_list ap) |
|
{ |
|
Fax3BaseState *sp = Fax3State(tif); |
|
|
|
assert(sp != 0); |
|
|
|
switch (tag) |
|
{ |
|
case TIFFTAG_FAXMODE: |
|
*va_arg(ap, int *) = sp->mode; |
|
break; |
|
case TIFFTAG_FAXFILLFUNC: |
|
*va_arg(ap, TIFFFaxFillFunc *) = DecoderState(tif)->fill; |
|
break; |
|
case TIFFTAG_GROUP3OPTIONS: |
|
case TIFFTAG_GROUP4OPTIONS: |
|
*va_arg(ap, uint32_t *) = sp->groupoptions; |
|
break; |
|
case TIFFTAG_BADFAXLINES: |
|
*va_arg(ap, uint32_t *) = sp->badfaxlines; |
|
break; |
|
case TIFFTAG_CLEANFAXDATA: |
|
*va_arg(ap, uint16_t *) = sp->cleanfaxdata; |
|
break; |
|
case TIFFTAG_CONSECUTIVEBADFAXLINES: |
|
*va_arg(ap, uint32_t *) = sp->badfaxrun; |
|
break; |
|
default: |
|
return (*sp->vgetparent)(tif, tag, ap); |
|
} |
|
return (1); |
|
} |
|
|
|
static void Fax3PrintDir(TIFF *tif, FILE *fd, long flags) |
|
{ |
|
Fax3BaseState *sp = Fax3State(tif); |
|
|
|
assert(sp != 0); |
|
|
|
(void)flags; |
|
if (TIFFFieldSet(tif, FIELD_OPTIONS)) |
|
{ |
|
const char *sep = " "; |
|
if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX4) |
|
{ |
|
fprintf(fd, " Group 4 Options:"); |
|
if (sp->groupoptions & GROUP4OPT_UNCOMPRESSED) |
|
fprintf(fd, "%suncompressed data", sep); |
|
} |
|
else |
|
{ |
|
|
|
fprintf(fd, " Group 3 Options:"); |
|
if (sp->groupoptions & GROUP3OPT_2DENCODING) |
|
{ |
|
fprintf(fd, "%s2-d encoding", sep); |
|
sep = "+"; |
|
} |
|
if (sp->groupoptions & GROUP3OPT_FILLBITS) |
|
{ |
|
fprintf(fd, "%sEOL padding", sep); |
|
sep = "+"; |
|
} |
|
if (sp->groupoptions & GROUP3OPT_UNCOMPRESSED) |
|
fprintf(fd, "%suncompressed data", sep); |
|
} |
|
fprintf(fd, " (%" PRIu32 " = 0x%" PRIx32 ")\n", sp->groupoptions, |
|
sp->groupoptions); |
|
} |
|
if (TIFFFieldSet(tif, FIELD_CLEANFAXDATA)) |
|
{ |
|
fprintf(fd, " Fax Data:"); |
|
switch (sp->cleanfaxdata) |
|
{ |
|
case CLEANFAXDATA_CLEAN: |
|
fprintf(fd, " clean"); |
|
break; |
|
case CLEANFAXDATA_REGENERATED: |
|
fprintf(fd, " receiver regenerated"); |
|
break; |
|
case CLEANFAXDATA_UNCLEAN: |
|
fprintf(fd, " uncorrected errors"); |
|
break; |
|
} |
|
fprintf(fd, " (%" PRIu16 " = 0x%" PRIx16 ")\n", sp->cleanfaxdata, |
|
sp->cleanfaxdata); |
|
} |
|
if (TIFFFieldSet(tif, FIELD_BADFAXLINES)) |
|
fprintf(fd, " Bad Fax Lines: %" PRIu32 "\n", sp->badfaxlines); |
|
if (TIFFFieldSet(tif, FIELD_BADFAXRUN)) |
|
fprintf(fd, " Consecutive Bad Fax Lines: %" PRIu32 "\n", |
|
sp->badfaxrun); |
|
if (sp->printdir) |
|
(*sp->printdir)(tif, fd, flags); |
|
} |
|
|
|
static int InitCCITTFax3(TIFF *tif) |
|
{ |
|
static const char module[] = "InitCCITTFax3"; |
|
Fax3BaseState *sp; |
|
|
|
/* |
|
* Merge codec-specific tag information. |
|
*/ |
|
if (!_TIFFMergeFields(tif, faxFields, TIFFArrayCount(faxFields))) |
|
{ |
|
TIFFErrorExtR(tif, "InitCCITTFax3", |
|
"Merging common CCITT Fax codec-specific tags failed"); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Allocate state block so tag methods have storage to record values. |
|
*/ |
|
tif->tif_data = (uint8_t *)_TIFFmallocExt(tif, sizeof(Fax3CodecState)); |
|
|
|
if (tif->tif_data == NULL) |
|
{ |
|
TIFFErrorExtR(tif, module, "No space for state block"); |
|
return (0); |
|
} |
|
_TIFFmemset(tif->tif_data, 0, sizeof(Fax3CodecState)); |
|
|
|
sp = Fax3State(tif); |
|
sp->rw_mode = tif->tif_mode; |
|
|
|
/* |
|
* Override parent get/set field methods. |
|
*/ |
|
sp->vgetparent = tif->tif_tagmethods.vgetfield; |
|
tif->tif_tagmethods.vgetfield = Fax3VGetField; /* hook for codec tags */ |
|
sp->vsetparent = tif->tif_tagmethods.vsetfield; |
|
tif->tif_tagmethods.vsetfield = Fax3VSetField; /* hook for codec tags */ |
|
sp->printdir = tif->tif_tagmethods.printdir; |
|
tif->tif_tagmethods.printdir = Fax3PrintDir; /* hook for codec tags */ |
|
sp->groupoptions = 0; |
|
|
|
if (sp->rw_mode == O_RDONLY) /* FIXME: improve for in place update */ |
|
tif->tif_flags |= TIFF_NOBITREV; /* decoder does bit reversal */ |
|
DecoderState(tif)->runs = NULL; |
|
TIFFSetField(tif, TIFFTAG_FAXFILLFUNC, _TIFFFax3fillruns); |
|
EncoderState(tif)->refline = NULL; |
|
|
|
/* |
|
* Install codec methods. |
|
*/ |
|
tif->tif_fixuptags = Fax3FixupTags; |
|
tif->tif_setupdecode = Fax3SetupState; |
|
tif->tif_predecode = Fax3PreDecode; |
|
tif->tif_decoderow = Fax3Decode1D; |
|
tif->tif_decodestrip = Fax3Decode1D; |
|
tif->tif_decodetile = Fax3Decode1D; |
|
tif->tif_setupencode = Fax3SetupState; |
|
tif->tif_preencode = Fax3PreEncode; |
|
tif->tif_postencode = Fax3PostEncode; |
|
tif->tif_encoderow = Fax3Encode; |
|
tif->tif_encodestrip = Fax3Encode; |
|
tif->tif_encodetile = Fax3Encode; |
|
tif->tif_close = Fax3Close; |
|
tif->tif_cleanup = Fax3Cleanup; |
|
|
|
return (1); |
|
} |
|
|
|
int TIFFInitCCITTFax3(TIFF *tif, int scheme) |
|
{ |
|
(void)scheme; |
|
if (InitCCITTFax3(tif)) |
|
{ |
|
/* |
|
* Merge codec-specific tag information. |
|
*/ |
|
if (!_TIFFMergeFields(tif, fax3Fields, TIFFArrayCount(fax3Fields))) |
|
{ |
|
TIFFErrorExtR(tif, "TIFFInitCCITTFax3", |
|
"Merging CCITT Fax 3 codec-specific tags failed"); |
|
return 0; |
|
} |
|
|
|
/* |
|
* The default format is Class/F-style w/o RTC. |
|
*/ |
|
return TIFFSetField(tif, TIFFTAG_FAXMODE, FAXMODE_CLASSF); |
|
} |
|
else |
|
return 01; |
|
} |
|
|
|
/* |
|
* CCITT Group 4 (T.6) Facsimile-compatible |
|
* Compression Scheme Support. |
|
*/ |
|
|
|
#define SWAP(t, a, b) \ |
|
{ \ |
|
t x; \ |
|
x = (a); \ |
|
(a) = (b); \ |
|
(b) = x; \ |
|
} |
|
/* |
|
* Decode the requested amount of G4-encoded data. |
|
*/ |
|
static int Fax4Decode(TIFF *tif, uint8_t *buf, tmsize_t occ, uint16_t s) |
|
{ |
|
DECLARE_STATE_2D(tif, sp, "Fax4Decode"); |
|
(void)s; |
|
if (occ % sp->b.rowbytes) |
|
{ |
|
TIFFErrorExtR(tif, module, "Fractional scanlines cannot be read"); |
|
return (-1); |
|
} |
|
CACHE_STATE(tif, sp); |
|
while (occ > 0) |
|
{ |
|
a0 = 0; |
|
RunLength = 0; |
|
pa = thisrun = sp->curruns; |
|
pb = sp->refruns; |
|
b1 = *pb++; |
|
#ifdef FAX3_DEBUG |
|
printf("\nBitAcc=%08" PRIX32 ", BitsAvail = %d\n", BitAcc, BitsAvail); |
|
printf("-------------------- %d\n", tif->tif_row); |
|
fflush(stdout); |
|
#endif |
|
EXPAND2D(EOFG4); |
|
if (EOLcnt) |
|
goto EOFG4; |
|
if (((lastx + 7) >> 3) > (int)occ) /* check for buffer overrun */ |
|
{ |
|
TIFFErrorExtR(tif, module, |
|
"Buffer overrun detected : %" TIFF_SSIZE_FORMAT |
|
" bytes available, %d bits needed", |
|
occ, lastx); |
|
return -1; |
|
} |
|
(*sp->fill)(buf, thisrun, pa, lastx); |
|
SETVALUE(0); /* imaginary change for reference */ |
|
SWAP(uint32_t *, sp->curruns, sp->refruns); |
|
buf += sp->b.rowbytes; |
|
occ -= sp->b.rowbytes; |
|
sp->line++; |
|
continue; |
|
EOFG4: |
|
NeedBits16(13, BADG4); |
|
BADG4: |
|
#ifdef FAX3_DEBUG |
|
if (GetBits(13) != 0x1001) |
|
fputs("Bad EOFB\n", stderr); |
|
#endif |
|
ClrBits(13); |
|
if (((lastx + 7) >> 3) > (int)occ) /* check for buffer overrun */ |
|
{ |
|
TIFFErrorExtR(tif, module, |
|
"Buffer overrun detected : %" TIFF_SSIZE_FORMAT |
|
" bytes available, %d bits needed", |
|
occ, lastx); |
|
return -1; |
|
} |
|
(*sp->fill)(buf, thisrun, pa, lastx); |
|
UNCACHE_STATE(tif, sp); |
|
return (sp->line ? 1 : -1); /* don't error on badly-terminated strips */ |
|
} |
|
UNCACHE_STATE(tif, sp); |
|
return (1); |
|
} |
|
#undef SWAP |
|
|
|
/* |
|
* Encode the requested amount of data. |
|
*/ |
|
static int Fax4Encode(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s) |
|
{ |
|
static const char module[] = "Fax4Encode"; |
|
Fax3CodecState *sp = EncoderState(tif); |
|
(void)s; |
|
if (cc % sp->b.rowbytes) |
|
{ |
|
TIFFErrorExtR(tif, module, "Fractional scanlines cannot be written"); |
|
return (0); |
|
} |
|
while (cc > 0) |
|
{ |
|
if (!Fax3Encode2DRow(tif, bp, sp->refline, sp->b.rowpixels)) |
|
return (0); |
|
_TIFFmemcpy(sp->refline, bp, sp->b.rowbytes); |
|
bp += sp->b.rowbytes; |
|
cc -= sp->b.rowbytes; |
|
} |
|
return (1); |
|
} |
|
|
|
static int Fax4PostEncode(TIFF *tif) |
|
{ |
|
Fax3CodecState *sp = EncoderState(tif); |
|
|
|
/* terminate strip w/ EOFB */ |
|
Fax3PutBits(tif, EOL, 12); |
|
Fax3PutBits(tif, EOL, 12); |
|
if (sp->bit != 8) |
|
Fax3FlushBits(tif, sp); |
|
return (1); |
|
} |
|
|
|
int TIFFInitCCITTFax4(TIFF *tif, int scheme) |
|
{ |
|
(void)scheme; |
|
if (InitCCITTFax3(tif)) |
|
{ /* reuse G3 support */ |
|
/* |
|
* Merge codec-specific tag information. |
|
*/ |
|
if (!_TIFFMergeFields(tif, fax4Fields, TIFFArrayCount(fax4Fields))) |
|
{ |
|
TIFFErrorExtR(tif, "TIFFInitCCITTFax4", |
|
"Merging CCITT Fax 4 codec-specific tags failed"); |
|
return 0; |
|
} |
|
|
|
tif->tif_decoderow = Fax4Decode; |
|
tif->tif_decodestrip = Fax4Decode; |
|
tif->tif_decodetile = Fax4Decode; |
|
tif->tif_encoderow = Fax4Encode; |
|
tif->tif_encodestrip = Fax4Encode; |
|
tif->tif_encodetile = Fax4Encode; |
|
tif->tif_postencode = Fax4PostEncode; |
|
/* |
|
* Suppress RTC at the end of each strip. |
|
*/ |
|
return TIFFSetField(tif, TIFFTAG_FAXMODE, FAXMODE_NORTC); |
|
} |
|
else |
|
return (0); |
|
} |
|
|
|
/* |
|
* CCITT Group 3 1-D Modified Huffman RLE Compression Support. |
|
* (Compression algorithms 2 and 32771) |
|
*/ |
|
|
|
/* |
|
* Decode the requested amount of RLE-encoded data. |
|
*/ |
|
static int Fax3DecodeRLE(TIFF *tif, uint8_t *buf, tmsize_t occ, uint16_t s) |
|
{ |
|
DECLARE_STATE(tif, sp, "Fax3DecodeRLE"); |
|
int mode = sp->b.mode; |
|
(void)s; |
|
if (occ % sp->b.rowbytes) |
|
{ |
|
TIFFErrorExtR(tif, module, "Fractional scanlines cannot be read"); |
|
return (-1); |
|
} |
|
CACHE_STATE(tif, sp); |
|
thisrun = sp->curruns; |
|
while (occ > 0) |
|
{ |
|
a0 = 0; |
|
RunLength = 0; |
|
pa = thisrun; |
|
#ifdef FAX3_DEBUG |
|
printf("\nBitAcc=%08" PRIX32 ", BitsAvail = %d\n", BitAcc, BitsAvail); |
|
printf("-------------------- %" PRIu32 "\n", tif->tif_row); |
|
fflush(stdout); |
|
#endif |
|
EXPAND1D(EOFRLE); |
|
(*sp->fill)(buf, thisrun, pa, lastx); |
|
/* |
|
* Cleanup at the end of the row. |
|
*/ |
|
if (mode & FAXMODE_BYTEALIGN) |
|
{ |
|
int n = BitsAvail - (BitsAvail & ~7); |
|
ClrBits(n); |
|
} |
|
else if (mode & FAXMODE_WORDALIGN) |
|
{ |
|
int n = BitsAvail - (BitsAvail & ~15); |
|
ClrBits(n); |
|
if (BitsAvail == 0 && !isAligned(cp, uint16_t)) |
|
cp++; |
|
} |
|
buf += sp->b.rowbytes; |
|
occ -= sp->b.rowbytes; |
|
sp->line++; |
|
continue; |
|
EOFRLE: /* premature EOF */ |
|
(*sp->fill)(buf, thisrun, pa, lastx); |
|
UNCACHE_STATE(tif, sp); |
|
return (-1); |
|
} |
|
UNCACHE_STATE(tif, sp); |
|
return (1); |
|
} |
|
|
|
int TIFFInitCCITTRLE(TIFF *tif, int scheme) |
|
{ |
|
(void)scheme; |
|
if (InitCCITTFax3(tif)) |
|
{ /* reuse G3 support */ |
|
tif->tif_decoderow = Fax3DecodeRLE; |
|
tif->tif_decodestrip = Fax3DecodeRLE; |
|
tif->tif_decodetile = Fax3DecodeRLE; |
|
/* |
|
* Suppress RTC+EOLs when encoding and byte-align data. |
|
*/ |
|
return TIFFSetField(tif, TIFFTAG_FAXMODE, |
|
FAXMODE_NORTC | FAXMODE_NOEOL | FAXMODE_BYTEALIGN); |
|
} |
|
else |
|
return (0); |
|
} |
|
|
|
int TIFFInitCCITTRLEW(TIFF *tif, int scheme) |
|
{ |
|
(void)scheme; |
|
if (InitCCITTFax3(tif)) |
|
{ /* reuse G3 support */ |
|
tif->tif_decoderow = Fax3DecodeRLE; |
|
tif->tif_decodestrip = Fax3DecodeRLE; |
|
tif->tif_decodetile = Fax3DecodeRLE; |
|
/* |
|
* Suppress RTC+EOLs when encoding and word-align data. |
|
*/ |
|
return TIFFSetField(tif, TIFFTAG_FAXMODE, |
|
FAXMODE_NORTC | FAXMODE_NOEOL | FAXMODE_WORDALIGN); |
|
} |
|
else |
|
return (0); |
|
} |
|
#endif /* CCITT_SUPPORT */
|
|
|