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https://github.com/Cesarus85/ringfall-mjolnir-vr.git
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80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
/* $Header: /usr/people/sam/tiff/libtiff/RCS/tif_fax3.h,v 1.8 92/02/10 19:06:37 sam Exp $ */
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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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#ifndef _FAX3_
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#define _FAX3_
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/*
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* CCITT Group 3 compression/decompression definitions.
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*/
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#define FAX3_CLASSF TIFF_OPT0 /* use Class F protocol */
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/* the following are for use by Compression=2, 32771, and 4 (T.6) algorithms */
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#define FAX3_NOEOL TIFF_OPT1 /* no EOL code at end of row */
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#define FAX3_BYTEALIGN TIFF_OPT2 /* force byte alignment at end of row */
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#define FAX3_WORDALIGN TIFF_OPT3 /* force word alignment at end of row */
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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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short data; /* current i/o byte */
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short bit; /* current i/o bit in byte */
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short white; /* value of the color ``white'' */
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u_long rowbytes; /* XXX maybe should be a long? */
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u_long rowpixels; /* XXX maybe should be a long? */
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enum { /* decoding/encoding mode */
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G3_1D, /* basic 1-d mode */
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G3_2D /* optional 2-d mode */
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} tag;
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#if defined(__STDC__) || defined(__EXTENDED__) || USE_CONST
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u_char const *bitmap; /* bit reversal table */
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#else
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u_char *bitmap; /* bit reversal table */
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#endif
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u_char *refline; /* reference line for 2d decoding */
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} Fax3BaseState;
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/* these routines are used for Group 4 (T.6) */
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#if USE_PROTOTYPES
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extern int Fax3Decode2DRow(TIFF*, u_char *, int);
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extern int Fax3Encode2DRow(TIFF*, u_char *, u_char *, int);
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extern void Fax3PutEOL(TIFF*);
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#else
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extern int Fax3Decode2DRow();
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extern int Fax3Encode2DRow();
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extern void Fax3PutEOL();
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#endif
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#define Fax3FlushBits(tif, sp) { \
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if ((tif)->tif_rawcc >= (tif)->tif_rawdatasize) \
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(void) TIFFFlushData1(tif); \
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*(tif)->tif_rawcp++ = (sp)->bitmap[(sp)->data]; \
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(tif)->tif_rawcc++; \
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(sp)->data = 0; \
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(sp)->bit = 8; \
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}
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#endif /* _FAX3_ */
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