1 /* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.5.2.2 2010-06-08 18:50:42 bfriesen Exp $ */
4 * Copyright (c) 1988-1997 Sam Leffler
5 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
7 * Permission to use, copy, modify, distribute, and sell this software and
8 * its documentation for any purpose is hereby granted without fee, provided
9 * that (i) the above copyright notices and this permission notice appear in
10 * all copies of the software and related documentation, and (ii) the names of
11 * Sam Leffler and Silicon Graphics may not be used in any advertising or
12 * publicity relating to the software without the specific, prior written
13 * permission of Sam Leffler and Silicon Graphics.
15 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
17 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
19 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
20 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
21 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
22 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
23 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
30 * "Null" Compression Algorithm Support.
35 * Encode a hunk of pixels.
38 DumpModeEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
45 if (tif->tif_rawcc + n > tif->tif_rawdatasize)
46 n = tif->tif_rawdatasize - tif->tif_rawcc;
51 * Avoid copy if client has setup raw
52 * data buffer to avoid extra copy.
54 if (tif->tif_rawcp != pp)
55 _TIFFmemcpy(tif->tif_rawcp, pp, n);
60 if (tif->tif_rawcc >= tif->tif_rawdatasize &&
68 * Decode a hunk of pixels.
71 DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
74 /* fprintf(stderr,"DumpModeDecode: scanline %ld, expected %ld bytes, got %ld bytes\n", */
75 /* (long) tif->tif_row, (long) tif->tif_rawcc, (long) cc); */
76 if (tif->tif_rawcc < cc) {
77 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
78 "DumpModeDecode: Not enough data for scanline %d",
83 * Avoid copy if client has setup raw
84 * data buffer to avoid extra copy.
86 if (tif->tif_rawcp != buf)
87 _TIFFmemcpy(buf, tif->tif_rawcp, cc);
94 * Seek forwards nrows in the current strip.
97 DumpModeSeek(TIFF* tif, uint32 nrows)
99 tif->tif_rawcp += nrows * tif->tif_scanlinesize;
100 tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
105 * Initialize dump mode.
108 TIFFInitDumpMode(TIFF* tif, int scheme)
111 tif->tif_decoderow = DumpModeDecode;
112 tif->tif_decodestrip = DumpModeDecode;
113 tif->tif_decodetile = DumpModeDecode;
114 tif->tif_encoderow = DumpModeEncode;
115 tif->tif_encodestrip = DumpModeEncode;
116 tif->tif_encodetile = DumpModeEncode;
117 tif->tif_seek = DumpModeSeek;