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Commit	Line	Data
	1	/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.14 2011-04-02 20:54:09 bfriesen 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	static int
	35	DumpFixupTags(TIFF* tif)
	36	{
	37	(void) tif;
	38	return (1);
	39	}
	40
	41	/*
	42	* Encode a hunk of pixels.
	43	*/
	44	static int
	45	DumpModeEncode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 s)
	46	{
	47	(void) s;
	48	while (cc > 0) {
	49	tmsize_t n;
	50
	51	n = cc;
	52	if (tif->tif_rawcc + n > tif->tif_rawdatasize)
	53	n = tif->tif_rawdatasize - tif->tif_rawcc;
	54
	55	assert( n > 0 );
	56
	57	/*
	58	* Avoid copy if client has setup raw
	59	* data buffer to avoid extra copy.
	60	*/
	61	if (tif->tif_rawcp != pp)
	62	_TIFFmemcpy(tif->tif_rawcp, pp, n);
	63	tif->tif_rawcp += n;
	64	tif->tif_rawcc += n;
	65	pp += n;
	66	cc -= n;
	67	if (tif->tif_rawcc >= tif->tif_rawdatasize &&
	68	!TIFFFlushData1(tif))
	69	return (-1);
	70	}
	71	return (1);
	72	}
	73
	74	/*
	75	* Decode a hunk of pixels.
	76	*/
	77	static int
	78	DumpModeDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s)
	79	{
	80	static const char module[] = "DumpModeDecode";
	81	(void) s;
	82	if (tif->tif_rawcc < cc) {
	83	#if defined(__WIN32__) && (defined(_MSC_VER) \|\| defined(__MINGW32__))
	84	TIFFErrorExt(tif->tif_clientdata, module,
	85	"Not enough data for scanline %lu, expected a request for at most %I64d bytes, got a request for %I64d bytes",
	86	(unsigned long) tif->tif_row,
	87	(signed __int64) tif->tif_rawcc,
	88	(signed __int64) cc);
	89	#else
	90	TIFFErrorExt(tif->tif_clientdata, module,
	91	"Not enough data for scanline %lu, expected a request for at most %lld bytes, got a request for %lld bytes",
	92	(unsigned long) tif->tif_row,
	93	(signed long long) tif->tif_rawcc,
	94	(signed long long) cc);
	95	#endif
	96	return (0);
	97	}
	98	/*
	99	* Avoid copy if client has setup raw
	100	* data buffer to avoid extra copy.
	101	*/
	102	if (tif->tif_rawcp != buf)
	103	_TIFFmemcpy(buf, tif->tif_rawcp, cc);
	104	tif->tif_rawcp += cc;
	105	tif->tif_rawcc -= cc;
	106	return (1);
	107	}
	108
	109	/*
	110	* Seek forwards nrows in the current strip.
	111	*/
	112	static int
	113	DumpModeSeek(TIFF* tif, uint32 nrows)
	114	{
	115	tif->tif_rawcp += nrows * tif->tif_scanlinesize;
	116	tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
	117	return (1);
	118	}
	119
	120	/*
	121	* Initialize dump mode.
	122	*/
	123	int
	124	TIFFInitDumpMode(TIFF* tif, int scheme)
	125	{
	126	(void) scheme;
	127	tif->tif_fixuptags = DumpFixupTags;
	128	tif->tif_decoderow = DumpModeDecode;
	129	tif->tif_decodestrip = DumpModeDecode;
	130	tif->tif_decodetile = DumpModeDecode;
	131	tif->tif_encoderow = DumpModeEncode;
	132	tif->tif_encodestrip = DumpModeEncode;
	133	tif->tif_encodetile = DumpModeEncode;
	134	tif->tif_seek = DumpModeSeek;
	135	return (1);
	136	}
	137	/*
	138	* Local Variables:
	139	* mode: c
	140	* c-basic-offset: 8
	141	* fill-column: 78
	142	* End:
	143	*/