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#ifndef lint
static char rcsid[] = "$Header: /usr/people/sam/tiff/libtiff/RCS/tif_dumpmode.c,v 1.23 92/02/10 19:06:35 sam Exp $";
#endif
/*
* Copyright (c) 1988, 1989, 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.
*
* "Null" Compression Algorithm Support.
*/
#include "tiffioP.h"
#include <stdio.h>
#include <assert.h>
#if USE_PROTOTYPES
static int DumpModeEncode(TIFF *, u_char *, int, u_int);
static int DumpModeDecode(TIFF *, u_char *, int, u_int);
static int DumpModeSeek(TIFF *, int);
#else
static int DumpModeEncode(), DumpModeDecode(), DumpModeSeek();
#endif
/*
* Initialize dump mode.
*/
TIFFInitDumpMode(tif)
register TIFF *tif;
{
tif->tif_decoderow = DumpModeDecode;
tif->tif_decodestrip = DumpModeDecode;
tif->tif_decodetile = DumpModeDecode;
tif->tif_encoderow = DumpModeEncode;
tif->tif_encodestrip = DumpModeEncode;
tif->tif_encodetile = DumpModeEncode;
tif->tif_seek = DumpModeSeek;
return (1);
}
/*
* Encode a hunk of pixels.
*/
static int
DumpModeEncode(tif, pp, cc, s)
register TIFF *tif;
u_char *pp;
int cc;
u_int s;
{
/*
* This may be overzealous, but avoids having to
* worry about byte alignment for the (potential)
* byte-swapping work below.
*/
if (tif->tif_rawcc + cc > tif->tif_rawdatasize)
if (!TIFFFlushData1(tif))
return (-1);
while (cc > 0) {
int n;
if ((n = cc) > tif->tif_rawdatasize)
n = tif->tif_rawdatasize;
bcopy(pp, tif->tif_rawcp, n);
if (tif->tif_flags & TIFF_SWAB) {
switch (tif->tif_dir.td_bitspersample) {
case 16:
assert((n & 3) == 0);
TIFFSwabArrayOfShort((u_short *)tif->tif_rawcp,
n/2);
break;
case 32:
assert((n & 15) == 0);
TIFFSwabArrayOfLong((u_long *)tif->tif_rawcp,
n/4);
break;
}
}
tif->tif_rawcp += n;
tif->tif_rawcc += n;
pp += n;
cc -= n;
if (tif->tif_rawcc >= tif->tif_rawdatasize &&
!TIFFFlushData1(tif))
return (-1);
}
return (1);
}
/*
* Decode a hunk of pixels.
*/
static int
DumpModeDecode(tif, buf, cc, s)
register TIFF *tif;
u_char *buf;
int cc;
u_int s;
{
if (tif->tif_rawcc < cc) {
TIFFError(tif->tif_name,
"DumpModeDecode: Not enough data for scanline %d",
tif->tif_row);
return (0);
}
/*
* Avoid copy if client has setup raw
* data buffer to avoid extra copy.
*/
if (tif->tif_rawcp != (char*) buf)
bcopy(tif->tif_rawcp, buf, cc);
if (tif->tif_flags & TIFF_SWAB) {
switch (tif->tif_dir.td_bitspersample) {
case 16:
assert((cc & 3) == 0);
TIFFSwabArrayOfShort((u_short *)buf, cc/2);
break;
case 32:
assert((cc & 15) == 0);
TIFFSwabArrayOfLong((u_long *)buf, cc/4);
break;
}
}
tif->tif_rawcp += cc;
tif->tif_rawcc -= cc;
return (1);
}
/*
* Seek forwards nrows in the current strip.
*/
static int
DumpModeSeek(tif, nrows)
register TIFF *tif;
int nrows;
{
tif->tif_rawcp += nrows * tif->tif_scanlinesize;
tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
return (1);
}
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