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/src/FreeImage/Source/LibTIFF/tif_dumpmode.c

https://bitbucket.org/cabalistic/ogredeps/
C | 126 lines | 59 code | 9 blank | 58 comment | 8 complexity | cbdfe17b43ec99bd4c80e5cff2b1a207 MD5 | raw file
  1/* $Header: /cvsroot/freeimage/FreeImage/Source/LibTIFF/tif_dumpmode.c,v 1.37 2011/04/10 17:14:09 drolon Exp $ */
  2
  3/*
  4 * Copyright (c) 1988-1997 Sam Leffler
  5 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
  6 *
  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.
 14 * 
 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.  
 18 * 
 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 
 24 * OF THIS SOFTWARE.
 25 */
 26
 27/*
 28 * TIFF Library.
 29 *
 30 * "Null" Compression Algorithm Support.
 31 */
 32#include "tiffiop.h"
 33
 34/*
 35 * Encode a hunk of pixels.
 36 */
 37static int
 38DumpModeEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
 39{
 40	(void) s;
 41	while (cc > 0) {
 42		tsize_t n;
 43
 44		n = cc;
 45		if (tif->tif_rawcc + n > tif->tif_rawdatasize)
 46			n = tif->tif_rawdatasize - tif->tif_rawcc;
 47
 48		assert( n > 0 );
 49                
 50		/*
 51		 * Avoid copy if client has setup raw
 52		 * data buffer to avoid extra copy.
 53		 */
 54		if (tif->tif_rawcp != pp)
 55			_TIFFmemcpy(tif->tif_rawcp, pp, n);
 56		tif->tif_rawcp += n;
 57		tif->tif_rawcc += n;
 58		pp += n;
 59		cc -= n;
 60		if (tif->tif_rawcc >= tif->tif_rawdatasize &&
 61		    !TIFFFlushData1(tif))
 62			return (-1);
 63	}
 64	return (1);
 65}
 66
 67/*
 68 * Decode a hunk of pixels.
 69 */
 70static int
 71DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
 72{
 73	(void) 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",
 79		    tif->tif_row);
 80		return (0);
 81	}
 82	/*
 83	 * Avoid copy if client has setup raw
 84	 * data buffer to avoid extra copy.
 85	 */
 86	if (tif->tif_rawcp != buf)
 87		_TIFFmemcpy(buf, tif->tif_rawcp, cc);
 88	tif->tif_rawcp += cc;
 89	tif->tif_rawcc -= cc;
 90	return (1);
 91}
 92
 93/*
 94 * Seek forwards nrows in the current strip.
 95 */
 96static int
 97DumpModeSeek(TIFF* tif, uint32 nrows)
 98{
 99	tif->tif_rawcp += nrows * tif->tif_scanlinesize;
100	tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
101	return (1);
102}
103
104/*
105 * Initialize dump mode.
106 */
107int
108TIFFInitDumpMode(TIFF* tif, int scheme)
109{
110	(void) 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;
118	return (1);
119}
120/*
121 * Local Variables:
122 * mode: c
123 * c-basic-offset: 8
124 * fill-column: 78
125 * End:
126 */