127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.5.2.2 2010-06-08 18:50:42 bfriesen Exp $ */
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/*
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* Copyright (c) 1988-1997 Sam Leffler
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* Copyright (c) 1991-1997 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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/*
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* TIFF Library.
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*
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* "Null" Compression Algorithm Support.
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*/
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#include "tiffiop.h"
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/*
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* Encode a hunk of pixels.
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*/
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static int
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DumpModeEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
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{
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(void) s;
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while (cc > 0) {
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tsize_t n;
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n = cc;
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if (tif->tif_rawcc + n > tif->tif_rawdatasize)
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n = tif->tif_rawdatasize - tif->tif_rawcc;
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assert( n > 0 );
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/*
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* Avoid copy if client has setup raw
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* data buffer to avoid extra copy.
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*/
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if (tif->tif_rawcp != pp)
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_TIFFmemcpy(tif->tif_rawcp, pp, n);
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tif->tif_rawcp += n;
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tif->tif_rawcc += n;
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pp += n;
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cc -= n;
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if (tif->tif_rawcc >= tif->tif_rawdatasize &&
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!TIFFFlushData1(tif))
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return (-1);
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}
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return (1);
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}
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/*
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* Decode a hunk of pixels.
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*/
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static int
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DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
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{
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(void) s;
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/* fprintf(stderr,"DumpModeDecode: scanline %ld, expected %ld bytes, got %ld bytes\n", */
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/* (long) tif->tif_row, (long) tif->tif_rawcc, (long) cc); */
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if (tif->tif_rawcc < cc) {
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
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"DumpModeDecode: Not enough data for scanline %d",
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tif->tif_row);
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return (0);
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}
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/*
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* Avoid copy if client has setup raw
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* data buffer to avoid extra copy.
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*/
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if (tif->tif_rawcp != buf)
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_TIFFmemcpy(buf, tif->tif_rawcp, cc);
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tif->tif_rawcp += cc;
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tif->tif_rawcc -= cc;
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return (1);
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}
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/*
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* Seek forwards nrows in the current strip.
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*/
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static int
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DumpModeSeek(TIFF* tif, uint32 nrows)
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{
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tif->tif_rawcp += nrows * tif->tif_scanlinesize;
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tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
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return (1);
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}
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/*
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* Initialize dump mode.
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*/
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int
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TIFFInitDumpMode(TIFF* tif, int scheme)
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{
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(void) scheme;
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tif->tif_decoderow = DumpModeDecode;
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tif->tif_decodestrip = DumpModeDecode;
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tif->tif_decodetile = DumpModeDecode;
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tif->tif_encoderow = DumpModeEncode;
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tif->tif_encodestrip = DumpModeEncode;
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tif->tif_encodetile = DumpModeEncode;
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tif->tif_seek = DumpModeSeek;
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return (1);
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}
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/*
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* Local Variables:
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* mode: c
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* c-basic-offset: 8
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* fill-column: 78
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* End:
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*/
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