mirror of
https://github.com/opencv/opencv.git
synced 2024-11-24 03:00:14 +08:00
52f3f5a3f6
* libtiff upgrade to version 4.6.0 * fix tiffvers.h cmake generation * temp: force build 3rd party deps from source * remove libport.h and spintf.c * cmake fixes * don't use tiff_dummy_namespace on windows * introduce numeric_types namespace alias * include cstdint * uint16_t is not a numeric_types type * fix uint16 and uint32 type defs * use standard c++ types * remove unused files * remove more unused files * revert build 3rd party code from source --------- Co-authored-by: Misha Klatis <misha.klatis@autodesk.com>
1736 lines
57 KiB
C
1736 lines
57 KiB
C
/*
|
|
* Copyright (c) 1990-1997 Sam Leffler
|
|
* Copyright (c) 1991-1997 Silicon Graphics, Inc.
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and
|
|
* its documentation for any purpose is hereby granted without fee, provided
|
|
* that (i) the above copyright notices and this permission notice appear in
|
|
* all copies of the software and related documentation, and (ii) the names of
|
|
* Sam Leffler and Silicon Graphics may not be used in any advertising or
|
|
* publicity relating to the software without the specific, prior written
|
|
* permission of Sam Leffler and Silicon Graphics.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
|
|
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
|
|
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
|
|
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
|
|
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
|
|
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
|
* OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include "tiffiop.h"
|
|
#ifdef CCITT_SUPPORT
|
|
/*
|
|
* TIFF Library.
|
|
*
|
|
* CCITT Group 3 (T.4) and Group 4 (T.6) Compression Support.
|
|
*
|
|
* This file contains support for decoding and encoding TIFF
|
|
* compression algorithms 2, 3, 4, and 32771.
|
|
*
|
|
* Decoder support is derived, with permission, from the code
|
|
* in Frank Cringle's viewfax program;
|
|
* Copyright (C) 1990, 1995 Frank D. Cringle.
|
|
*/
|
|
#include "tif_fax3.h"
|
|
#define G3CODES
|
|
#include "t4.h"
|
|
#include <stdio.h>
|
|
|
|
/*
|
|
* Compression+decompression state blocks are
|
|
* derived from this ``base state'' block.
|
|
*/
|
|
typedef struct
|
|
{
|
|
int rw_mode; /* O_RDONLY for decode, else encode */
|
|
int mode; /* operating mode */
|
|
tmsize_t rowbytes; /* bytes in a decoded scanline */
|
|
uint32_t rowpixels; /* pixels in a scanline */
|
|
|
|
uint16_t cleanfaxdata; /* CleanFaxData tag */
|
|
uint32_t badfaxrun; /* BadFaxRun tag */
|
|
uint32_t badfaxlines; /* BadFaxLines tag */
|
|
uint32_t groupoptions; /* Group 3/4 options tag */
|
|
|
|
TIFFVGetMethod vgetparent; /* super-class method */
|
|
TIFFVSetMethod vsetparent; /* super-class method */
|
|
TIFFPrintMethod printdir; /* super-class method */
|
|
} Fax3BaseState;
|
|
#define Fax3State(tif) ((Fax3BaseState *)(tif)->tif_data)
|
|
|
|
typedef enum
|
|
{
|
|
G3_1D,
|
|
G3_2D
|
|
} Ttag;
|
|
typedef struct
|
|
{
|
|
Fax3BaseState b;
|
|
|
|
/* Decoder state info */
|
|
const unsigned char *bitmap; /* bit reversal table */
|
|
uint32_t data; /* current i/o byte/word */
|
|
int bit; /* current i/o bit in byte */
|
|
int EOLcnt; /* count of EOL codes recognized */
|
|
TIFFFaxFillFunc fill; /* fill routine */
|
|
uint32_t *runs; /* b&w runs for current/previous row */
|
|
uint32_t nruns; /* size of the refruns / curruns arrays */
|
|
uint32_t *refruns; /* runs for reference line */
|
|
uint32_t *curruns; /* runs for current line */
|
|
|
|
/* Encoder state info */
|
|
Ttag tag; /* encoding state */
|
|
unsigned char *refline; /* reference line for 2d decoding */
|
|
int k; /* #rows left that can be 2d encoded */
|
|
int maxk; /* max #rows that can be 2d encoded */
|
|
|
|
int line;
|
|
} Fax3CodecState;
|
|
#define DecoderState(tif) ((Fax3CodecState *)Fax3State(tif))
|
|
#define EncoderState(tif) ((Fax3CodecState *)Fax3State(tif))
|
|
|
|
#define is2DEncoding(sp) (sp->b.groupoptions & GROUP3OPT_2DENCODING)
|
|
#define isAligned(p, t) ((((size_t)(p)) & (sizeof(t) - 1)) == 0)
|
|
|
|
/*
|
|
* Group 3 and Group 4 Decoding.
|
|
*/
|
|
|
|
/*
|
|
* These macros glue the TIFF library state to
|
|
* the state expected by Frank's decoder.
|
|
*/
|
|
#define DECLARE_STATE(tif, sp, mod) \
|
|
static const char module[] = mod; \
|
|
Fax3CodecState *sp = DecoderState(tif); \
|
|
int a0; /* reference element */ \
|
|
int lastx = sp->b.rowpixels; /* last element in row */ \
|
|
uint32_t BitAcc; /* bit accumulator */ \
|
|
int BitsAvail; /* # valid bits in BitAcc */ \
|
|
int RunLength; /* length of current run */ \
|
|
unsigned char *cp; /* next byte of input data */ \
|
|
unsigned char *ep; /* end of input data */ \
|
|
uint32_t *pa; /* place to stuff next run */ \
|
|
uint32_t *thisrun; /* current row's run array */ \
|
|
int EOLcnt; /* # EOL codes recognized */ \
|
|
const unsigned char *bitmap = sp->bitmap; /* input data bit reverser */ \
|
|
const TIFFFaxTabEnt *TabEnt
|
|
#define DECLARE_STATE_2D(tif, sp, mod) \
|
|
DECLARE_STATE(tif, sp, mod); \
|
|
int b1; /* next change on prev line */ \
|
|
uint32_t \
|
|
*pb /* next run in reference line */ /* \
|
|
* Load any state that may be \
|
|
* changed during decoding. \
|
|
*/
|
|
#define CACHE_STATE(tif, sp) \
|
|
do \
|
|
{ \
|
|
BitAcc = sp->data; \
|
|
BitsAvail = sp->bit; \
|
|
EOLcnt = sp->EOLcnt; \
|
|
cp = (unsigned char *)tif->tif_rawcp; \
|
|
ep = cp + tif->tif_rawcc; \
|
|
} while (0)
|
|
/*
|
|
* Save state possibly changed during decoding.
|
|
*/
|
|
#define UNCACHE_STATE(tif, sp) \
|
|
do \
|
|
{ \
|
|
sp->bit = BitsAvail; \
|
|
sp->data = BitAcc; \
|
|
sp->EOLcnt = EOLcnt; \
|
|
tif->tif_rawcc -= (tmsize_t)((uint8_t *)cp - tif->tif_rawcp); \
|
|
tif->tif_rawcp = (uint8_t *)cp; \
|
|
} while (0)
|
|
|
|
/*
|
|
* Setup state for decoding a strip.
|
|
*/
|
|
static int Fax3PreDecode(TIFF *tif, uint16_t s)
|
|
{
|
|
Fax3CodecState *sp = DecoderState(tif);
|
|
|
|
(void)s;
|
|
assert(sp != NULL);
|
|
sp->bit = 0; /* force initial read */
|
|
sp->data = 0;
|
|
sp->EOLcnt = 0; /* force initial scan for EOL */
|
|
/*
|
|
* Decoder assumes lsb-to-msb bit order. Note that we select
|
|
* this here rather than in Fax3SetupState so that viewers can
|
|
* hold the image open, fiddle with the FillOrder tag value,
|
|
* and then re-decode the image. Otherwise they'd need to close
|
|
* and open the image to get the state reset.
|
|
*/
|
|
sp->bitmap =
|
|
TIFFGetBitRevTable(tif->tif_dir.td_fillorder != FILLORDER_LSB2MSB);
|
|
sp->curruns = sp->runs;
|
|
if (sp->refruns)
|
|
{ /* init reference line to white */
|
|
sp->refruns = sp->runs + sp->nruns;
|
|
sp->refruns[0] = (uint32_t)sp->b.rowpixels;
|
|
sp->refruns[1] = 0;
|
|
}
|
|
sp->line = 0;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Routine for handling various errors/conditions.
|
|
* Note how they are "glued into the decoder" by
|
|
* overriding the definitions used by the decoder.
|
|
*/
|
|
|
|
static void Fax3Unexpected(const char *module, TIFF *tif, uint32_t line,
|
|
uint32_t a0)
|
|
{
|
|
TIFFErrorExtR(tif, module,
|
|
"Bad code word at line %" PRIu32 " of %s %" PRIu32
|
|
" (x %" PRIu32 ")",
|
|
line, isTiled(tif) ? "tile" : "strip",
|
|
(isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), a0);
|
|
}
|
|
#define unexpected(table, a0) Fax3Unexpected(module, tif, sp->line, a0)
|
|
|
|
static void Fax3Extension(const char *module, TIFF *tif, uint32_t line,
|
|
uint32_t a0)
|
|
{
|
|
TIFFErrorExtR(tif, module,
|
|
"Uncompressed data (not supported) at line %" PRIu32
|
|
" of %s %" PRIu32 " (x %" PRIu32 ")",
|
|
line, isTiled(tif) ? "tile" : "strip",
|
|
(isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), a0);
|
|
}
|
|
#define extension(a0) Fax3Extension(module, tif, sp->line, a0)
|
|
|
|
static void Fax3BadLength(const char *module, TIFF *tif, uint32_t line,
|
|
uint32_t a0, uint32_t lastx)
|
|
{
|
|
TIFFWarningExtR(tif, module,
|
|
"%s at line %" PRIu32 " of %s %" PRIu32 " (got %" PRIu32
|
|
", expected %" PRIu32 ")",
|
|
a0 < lastx ? "Premature EOL" : "Line length mismatch", line,
|
|
isTiled(tif) ? "tile" : "strip",
|
|
(isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), a0,
|
|
lastx);
|
|
}
|
|
#define badlength(a0, lastx) Fax3BadLength(module, tif, sp->line, a0, lastx)
|
|
|
|
static void Fax3PrematureEOF(const char *module, TIFF *tif, uint32_t line,
|
|
uint32_t a0)
|
|
{
|
|
TIFFWarningExtR(tif, module,
|
|
"Premature EOF at line %" PRIu32 " of %s %" PRIu32
|
|
" (x %" PRIu32 ")",
|
|
line, isTiled(tif) ? "tile" : "strip",
|
|
(isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip), a0);
|
|
}
|
|
#define prematureEOF(a0) Fax3PrematureEOF(module, tif, sp->line, a0)
|
|
|
|
#define Nop
|
|
|
|
/**
|
|
* Decode the requested amount of G3 1D-encoded data.
|
|
* @param buf destination buffer
|
|
* @param occ available bytes in destination buffer
|
|
* @param s number of planes (ignored)
|
|
* @returns 1 for success, -1 in case of error
|
|
*/
|
|
static int Fax3Decode1D(TIFF *tif, uint8_t *buf, tmsize_t occ, uint16_t s)
|
|
{
|
|
DECLARE_STATE(tif, sp, "Fax3Decode1D");
|
|
(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
|
|
SYNC_EOL(EOF1D);
|
|
EXPAND1D(EOF1Da);
|
|
(*sp->fill)(buf, thisrun, pa, lastx);
|
|
buf += sp->b.rowbytes;
|
|
occ -= sp->b.rowbytes;
|
|
sp->line++;
|
|
continue;
|
|
EOF1D: /* premature EOF */
|
|
CLEANUP_RUNS();
|
|
EOF1Da: /* premature EOF */
|
|
(*sp->fill)(buf, thisrun, pa, lastx);
|
|
UNCACHE_STATE(tif, sp);
|
|
return (-1);
|
|
}
|
|
UNCACHE_STATE(tif, sp);
|
|
return (1);
|
|
}
|
|
|
|
#define SWAP(t, a, b) \
|
|
{ \
|
|
t x; \
|
|
x = (a); \
|
|
(a) = (b); \
|
|
(b) = x; \
|
|
}
|
|
/*
|
|
* Decode the requested amount of G3 2D-encoded data.
|
|
*/
|
|
static int Fax3Decode2D(TIFF *tif, uint8_t *buf, tmsize_t occ, uint16_t s)
|
|
{
|
|
DECLARE_STATE_2D(tif, sp, "Fax3Decode2D");
|
|
int is1D; /* current line is 1d/2d-encoded */
|
|
(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;
|
|
#ifdef FAX3_DEBUG
|
|
printf("\nBitAcc=%08" PRIX32 ", BitsAvail = %d EOLcnt = %d", BitAcc,
|
|
BitsAvail, EOLcnt);
|
|
#endif
|
|
SYNC_EOL(EOF2D);
|
|
NeedBits8(1, EOF2D);
|
|
is1D = GetBits(1); /* 1D/2D-encoding tag bit */
|
|
ClrBits(1);
|
|
#ifdef FAX3_DEBUG
|
|
printf(" %s\n-------------------- %" PRIu32 "\n", is1D ? "1D" : "2D",
|
|
tif->tif_row);
|
|
fflush(stdout);
|
|
#endif
|
|
pb = sp->refruns;
|
|
b1 = *pb++;
|
|
if (is1D)
|
|
EXPAND1D(EOF2Da);
|
|
else
|
|
EXPAND2D(EOF2Da);
|
|
(*sp->fill)(buf, thisrun, pa, lastx);
|
|
if (pa < thisrun + sp->nruns)
|
|
{
|
|
SETVALUE(0); /* imaginary change for reference */
|
|
}
|
|
SWAP(uint32_t *, sp->curruns, sp->refruns);
|
|
buf += sp->b.rowbytes;
|
|
occ -= sp->b.rowbytes;
|
|
sp->line++;
|
|
continue;
|
|
EOF2D: /* premature EOF */
|
|
CLEANUP_RUNS();
|
|
EOF2Da: /* premature EOF */
|
|
(*sp->fill)(buf, thisrun, pa, lastx);
|
|
UNCACHE_STATE(tif, sp);
|
|
return (-1);
|
|
}
|
|
UNCACHE_STATE(tif, sp);
|
|
return (1);
|
|
}
|
|
#undef SWAP
|
|
|
|
#define FILL(n, cp) \
|
|
for (int32_t ifill = 0; ifill < (n); ++ifill) \
|
|
{ \
|
|
(cp)[ifill] = 0xff; \
|
|
} \
|
|
(cp) += (n);
|
|
|
|
#define ZERO(n, cp) \
|
|
for (int32_t izero = 0; izero < (n); ++izero) \
|
|
{ \
|
|
(cp)[izero] = 0; \
|
|
} \
|
|
(cp) += (n);
|
|
|
|
/*
|
|
* Bit-fill a row according to the white/black
|
|
* runs generated during G3/G4 decoding.
|
|
*/
|
|
void _TIFFFax3fillruns(unsigned char *buf, uint32_t *runs, uint32_t *erun,
|
|
uint32_t lastx)
|
|
{
|
|
static const unsigned char _fillmasks[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0,
|
|
0xf8, 0xfc, 0xfe, 0xff};
|
|
unsigned char *cp;
|
|
uint32_t x, bx, run;
|
|
int32_t n, nw;
|
|
int64_t *lp;
|
|
|
|
if ((erun - runs) & 1)
|
|
*erun++ = 0;
|
|
x = 0;
|
|
for (; runs < erun; runs += 2)
|
|
{
|
|
run = runs[0];
|
|
if (x + run > lastx || run > lastx)
|
|
run = runs[0] = (uint32_t)(lastx - x);
|
|
if (run)
|
|
{
|
|
cp = buf + (x >> 3);
|
|
bx = x & 7;
|
|
if (run > 8 - bx)
|
|
{
|
|
if (bx)
|
|
{ /* align to byte boundary */
|
|
*cp++ &= 0xff << (8 - bx);
|
|
run -= 8 - bx;
|
|
}
|
|
if ((n = run >> 3) != 0)
|
|
{ /* multiple bytes to fill */
|
|
if ((n / sizeof(int64_t)) > 1)
|
|
{
|
|
/*
|
|
* Align to int64_tword boundary and fill.
|
|
*/
|
|
for (; n && !isAligned(cp, int64_t); n--)
|
|
*cp++ = 0x00;
|
|
lp = (int64_t *)cp;
|
|
nw = (int32_t)(n / sizeof(int64_t));
|
|
n -= nw * sizeof(int64_t);
|
|
do
|
|
{
|
|
*lp++ = 0L;
|
|
} while (--nw);
|
|
cp = (unsigned char *)lp;
|
|
}
|
|
ZERO(n, cp);
|
|
run &= 7;
|
|
}
|
|
if (run)
|
|
cp[0] &= 0xff >> run;
|
|
}
|
|
else
|
|
cp[0] &= ~(_fillmasks[run] >> bx);
|
|
x += runs[0];
|
|
}
|
|
run = runs[1];
|
|
if (x + run > lastx || run > lastx)
|
|
run = runs[1] = lastx - x;
|
|
if (run)
|
|
{
|
|
cp = buf + (x >> 3);
|
|
bx = x & 7;
|
|
if (run > 8 - bx)
|
|
{
|
|
if (bx)
|
|
{ /* align to byte boundary */
|
|
*cp++ |= 0xff >> bx;
|
|
run -= 8 - bx;
|
|
}
|
|
if ((n = run >> 3) != 0)
|
|
{ /* multiple bytes to fill */
|
|
if ((n / sizeof(int64_t)) > 1)
|
|
{
|
|
/*
|
|
* Align to int64_t boundary and fill.
|
|
*/
|
|
for (; n && !isAligned(cp, int64_t); n--)
|
|
*cp++ = 0xff;
|
|
lp = (int64_t *)cp;
|
|
nw = (int32_t)(n / sizeof(int64_t));
|
|
n -= nw * sizeof(int64_t);
|
|
do
|
|
{
|
|
*lp++ = -1L;
|
|
} while (--nw);
|
|
cp = (unsigned char *)lp;
|
|
}
|
|
FILL(n, cp);
|
|
run &= 7;
|
|
}
|
|
/* Explicit 0xff masking to make icc -check=conversions happy */
|
|
if (run)
|
|
cp[0] = (unsigned char)((cp[0] | (0xff00 >> run)) & 0xff);
|
|
}
|
|
else
|
|
cp[0] |= _fillmasks[run] >> bx;
|
|
x += runs[1];
|
|
}
|
|
}
|
|
assert(x == lastx);
|
|
}
|
|
#undef ZERO
|
|
#undef FILL
|
|
|
|
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 */
|