src/tiff/tif_dumpmode.c

/* $Header$ */

/*
 * 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;
		/*
		 * 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) {
		TIFFError(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	/* $Header$ */
	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	* Avoid copy if client has setup raw
	49	* data buffer to avoid extra copy.
	50	*/
	51	if (tif->tif_rawcp != pp)
	52	_TIFFmemcpy(tif->tif_rawcp, pp, n);
	53	tif->tif_rawcp += n;
	54	tif->tif_rawcc += n;
	55	pp += n;
	56	cc -= n;
	57	if (tif->tif_rawcc >= tif->tif_rawdatasize &&
	58	!TIFFFlushData1(tif))
	59	return (-1);
	60	}
	61	return (1);
	62	}
	63
	64	/*
	65	* Decode a hunk of pixels.
	66	*/
	67	static int
	68	DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
	69	{
	70	(void) s;
	71	if (tif->tif_rawcc < cc) {
	72	TIFFError(tif->tif_name,
	73	"DumpModeDecode: Not enough data for scanline %d",
	74	tif->tif_row);
	75	return (0);
	76	}
	77	/*
	78	* Avoid copy if client has setup raw
	79	* data buffer to avoid extra copy.
	80	*/
	81	if (tif->tif_rawcp != buf)
	82	_TIFFmemcpy(buf, tif->tif_rawcp, cc);
	83	tif->tif_rawcp += cc;
	84	tif->tif_rawcc -= cc;
	85	return (1);
	86	}
	87
	88	/*
	89	* Seek forwards nrows in the current strip.
	90	*/
	91	static int
	92	DumpModeSeek(TIFF* tif, uint32 nrows)
	93	{
	94	tif->tif_rawcp += nrows * tif->tif_scanlinesize;
	95	tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
	96	return (1);
	97	}
	98
	99	/*
	100	* Initialize dump mode.
	101	*/
	102	int
	103	TIFFInitDumpMode(TIFF* tif, int scheme)
	104	{
	105	(void) scheme;
	106	tif->tif_decoderow = DumpModeDecode;
	107	tif->tif_decodestrip = DumpModeDecode;
	108	tif->tif_decodetile = DumpModeDecode;
	109	tif->tif_encoderow = DumpModeEncode;
	110	tif->tif_encodestrip = DumpModeEncode;
	111	tif->tif_encodetile = DumpModeEncode;
	112	tif->tif_seek = DumpModeSeek;
	113	return (1);
	114	}