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#ifndef lint
static char rcsid[] = "/mode/users/src/master/tiff/libtiff/tif_fax4.c,v 1.1.1.1 1994/04/01 17:15:19 fedor Exp";
#endif
/*
* Copyright (c) 1990, 1991, 1992 Sam Leffler
* Copyright (c) 1991, 1992 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.
*/
/*
* TIFF Library.
*
* CCITT Group 4 Facsimile-compatible
* Compression Scheme Support.
*/
#include "tiffioP.h"
#include "tif_fax3.h"
#if USE_PROTOTYPES
static int Fax4Decode(TIFF*, u_char *, int, u_int);
static int Fax4Encode(TIFF*, u_char *, int, u_int);
static int Fax4PostEncode(TIFF*);
#else
static int Fax4Decode();
static int Fax4Encode();
static int Fax4PostEncode();
#endif
TIFFInitCCITTFax4(tif)
TIFF *tif;
{
TIFFInitCCITTFax3(tif); /* reuse G3 compression */
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;
/*
* FAX3_NOEOL causes the regular G3 decompression
* code to not skip to the EOL mark at the end of
* a row (during normal decoding). FAX3_CLASSF
* suppresses RTC generation at the end of an image.
*/
tif->tif_options = FAX3_NOEOL|FAX3_CLASSF;
return (1);
}
/*
* Decode the requested amount of data.
*/
static int
Fax4Decode(tif, buf, occ, s)
TIFF *tif;
u_char *buf;
int occ;
u_int s;
{
Fax3BaseState *sp = (Fax3BaseState *)tif->tif_data;
bzero(buf, occ); /* decoding only sets non-zero bits */
while (occ > 0) {
if (!Fax3Decode2DRow(tif, buf, sp->rowpixels))
return (0);
bcopy(buf, sp->refline, sp->rowbytes);
buf += sp->rowbytes;
occ -= sp->rowbytes;
}
return (1);
}
/*
* Encode the requested amount of data.
*/
static int
Fax4Encode(tif, bp, cc, s)
TIFF *tif;
u_char *bp;
int cc;
u_int s;
{
Fax3BaseState *sp = (Fax3BaseState *)tif->tif_data;
while (cc > 0) {
if (!Fax3Encode2DRow(tif, bp, sp->refline, sp->rowpixels))
return (0);
bcopy(bp, sp->refline, sp->rowbytes);
bp += sp->rowbytes;
cc -= sp->rowbytes;
}
return (1);
}
static
Fax4PostEncode(tif)
TIFF *tif;
{
Fax3BaseState *sp = (Fax3BaseState *)tif->tif_data;
/* terminate strip w/ EOFB */
Fax3PutEOL(tif);
Fax3PutEOL(tif);
if (sp->bit != 8)
Fax3FlushBits(tif, sp);
return (1);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.