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https://github.com/Cesarus85/ringfall-mjolnir-vr.git
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129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
#ifndef lint
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static char rcsid[] = "$Header: /usr/people/sam/tiff/libtiff/RCS/tif_fax4.c,v 1.14 92/03/11 15:45:17 sam Exp $";
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#endif
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/*
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* Copyright (c) 1990, 1991, 1992 Sam Leffler
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* Copyright (c) 1991, 1992 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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#if 0
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/*
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* TIFF Library.
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*
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* CCITT Group 4 Facsimile-compatible
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* Compression Scheme Support.
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*/
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#include "tiffioP.h"
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#include "tif_fax3.h"
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#if USE_PROTOTYPES
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static int Fax4Decode(TIFF*, u_char *, int, u_int);
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static int Fax4Encode(TIFF*, u_char *, int, u_int);
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static int Fax4PostEncode(TIFF*);
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#else
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static int Fax4Decode();
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static int Fax4Encode();
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static int Fax4PostEncode();
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#endif
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TIFFInitCCITTFax4(tif)
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TIFF *tif;
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{
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TIFFInitCCITTFax3(tif); /* reuse G3 compression */
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tif->tif_decoderow = Fax4Decode;
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tif->tif_decodestrip = Fax4Decode;
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tif->tif_decodetile = Fax4Decode;
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tif->tif_encoderow = Fax4Encode;
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tif->tif_encodestrip = Fax4Encode;
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tif->tif_encodetile = Fax4Encode;
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tif->tif_postencode = Fax4PostEncode;
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/*
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* FAX3_NOEOL causes the regular G3 decompression
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* code to not skip to the EOL mark at the end of
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* a row (during normal decoding). FAX3_CLASSF
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* suppresses RTC generation at the end of an image.
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*/
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tif->tif_options = FAX3_NOEOL|FAX3_CLASSF;
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return (1);
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}
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/*
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* Decode the requested amount of data.
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*/
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static int
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Fax4Decode(tif, buf, occ, s)
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TIFF *tif;
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u_char *buf;
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int occ;
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u_int s;
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{
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Fax3BaseState *sp = (Fax3BaseState *)tif->tif_data;
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bzero(buf, occ); /* decoding only sets non-zero bits */
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while (occ > 0) {
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if (!Fax3Decode2DRow(tif, buf, sp->rowpixels))
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return (0);
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bcopy(buf, sp->refline, sp->rowbytes);
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buf += sp->rowbytes;
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occ -= sp->rowbytes;
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}
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return (1);
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}
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/*
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* Encode the requested amount of data.
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*/
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static int
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Fax4Encode(tif, bp, cc, s)
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TIFF *tif;
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u_char *bp;
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int cc;
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u_int s;
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{
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Fax3BaseState *sp = (Fax3BaseState *)tif->tif_data;
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while (cc > 0) {
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if (!Fax3Encode2DRow(tif, bp, sp->refline, sp->rowpixels))
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return (0);
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bcopy(bp, sp->refline, sp->rowbytes);
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bp += sp->rowbytes;
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cc -= sp->rowbytes;
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}
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return (1);
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}
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static
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Fax4PostEncode(tif)
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TIFF *tif;
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{
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Fax3BaseState *sp = (Fax3BaseState *)tif->tif_data;
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/* terminate strip w/ EOFB */
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Fax3PutEOL(tif);
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Fax3PutEOL(tif);
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if (sp->bit != 8)
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Fax3FlushBits(tif, sp);
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return (1);
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}
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#endif
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