src/tiff/libtiff/tif_dumpmode.c

/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.4 2005/12/21 12:23:13 joris Exp $ */

/*
 * 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"

/*
 * Encode a hunk of pixels.
 */
static int
DumpModeEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
{
	(void) s;
	while (cc > 0) {
		tsize_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 (-1);
	}
	return (1);
}

/*
 * Decode a hunk of pixels.
 */
static int
DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
{
	(void) s;
	if (tif->tif_rawcc < cc) {
		TIFFErrorExt(tif->tif_clientdata, 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 != 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 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_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);
}
Commit	Line	Data
	1	/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.4 2005/12/21 12:23:13 joris 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	*/
	37	static int
	38	DumpModeEncode(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	*/
	70	static int
	71	DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
	72	{
	73	(void) s;
	74	if (tif->tif_rawcc < cc) {
	75	TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
	76	"DumpModeDecode: Not enough data for scanline %d",
	77	tif->tif_row);
	78	return (0);
	79	}
	80	/*
	81	* Avoid copy if client has setup raw
	82	* data buffer to avoid extra copy.
	83	*/
	84	if (tif->tif_rawcp != buf)
	85	_TIFFmemcpy(buf, tif->tif_rawcp, cc);
	86	tif->tif_rawcp += cc;
	87	tif->tif_rawcc -= cc;
	88	return (1);
	89	}
	90
	91	/*
	92	* Seek forwards nrows in the current strip.
	93	*/
	94	static int
	95	DumpModeSeek(TIFF* tif, uint32 nrows)
	96	{
	97	tif->tif_rawcp += nrows * tif->tif_scanlinesize;
	98	tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
	99	return (1);
	100	}
	101
	102	/*
	103	* Initialize dump mode.
	104	*/
	105	int
	106	TIFFInitDumpMode(TIFF* tif, int scheme)
	107	{
	108	(void) scheme;
	109	tif->tif_decoderow = DumpModeDecode;
	110	tif->tif_decodestrip = DumpModeDecode;
	111	tif->tif_decodetile = DumpModeDecode;
	112	tif->tif_encoderow = DumpModeEncode;
	113	tif->tif_encodestrip = DumpModeEncode;
	114	tif->tif_encodetile = DumpModeEncode;
	115	tif->tif_seek = DumpModeSeek;
	116	return (1);
	117	}