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/*
* Copyright (c) 1988-1997 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.
*/
/*
* TIFF Library.
*
* "Null" Compression Algorithm Support.
*/
#include "tiffiop.h"
static int DumpFixupTags(TIFF *tif)
{
(void)tif;
return (1);
}
/*
* Encode a hunk of pixels.
*/
static int DumpModeEncode(TIFF *tif, uint8_t *pp, tmsize_t cc, uint16_t s)
{
(void)s;
while (cc > 0)
{
tmsize_t n;
n = cc;
if (tif->tif_rawcc + n > tif->tif_rawdatasize)
n = tif->tif_rawdatasize - tif->tif_rawcc;
assert(n > 0);
/*
* Avoid copy if client has setup raw
* data buffer to avoid extra copy.
*/
if (tif->tif_rawcp != pp)
_TIFFmemcpy(tif->tif_rawcp, pp, n);
tif->tif_rawcp += n;
tif->tif_rawcc += n;
pp += n;
cc -= n;
if (tif->tif_rawcc >= tif->tif_rawdatasize && !TIFFFlushData1(tif))
return (0);
}
return (1);
}
/*
* Decode a hunk of pixels.
*/
static int DumpModeDecode(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s)
{
static const char module[] = "DumpModeDecode";
(void)s;
if (tif->tif_rawcc < cc)
{
TIFFErrorExtR(tif, module,
"Not enough data for scanline %" PRIu32
", expected a request for at most %" TIFF_SSIZE_FORMAT
" bytes, got a request for %" TIFF_SSIZE_FORMAT " bytes",
tif->tif_row, tif->tif_rawcc, cc);
return (0);
}
/*
* Avoid copy if client has setup raw
* data buffer to avoid extra copy.
*/
if (tif->tif_rawcp != buf)
_TIFFmemcpy(buf, tif->tif_rawcp, cc);
tif->tif_rawcp += cc;
tif->tif_rawcc -= cc;
return (1);
}
/*
* Seek forwards nrows in the current strip.
*/
static int DumpModeSeek(TIFF *tif, uint32_t nrows)
{
tif->tif_rawcp += nrows * tif->tif_scanlinesize;
tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
return (1);
}
/*
* Initialize dump mode.
*/
int TIFFInitDumpMode(TIFF *tif, int scheme)
{
(void)scheme;
tif->tif_fixuptags = DumpFixupTags;
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);
}
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