/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.14 2011-04-02 20:54:09 bfriesen 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"

static int

DumpFixupTags(TIFF* tif)

{

	(void) tif;

	return (1);

}

/*

 * Encode a hunk of pixels.

 */

static int

DumpModeEncode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 s)

{

	(void) s;

	while (cc > 0) {

		tmsize_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, uint8* buf, tmsize_t cc, uint16 s)

{

	static const char module[] = "DumpModeDecode";

	(void) s;

	if (tif->tif_rawcc < cc) {

#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))

		TIFFErrorExt(tif->tif_clientdata, module,

"Not enough data for scanline %lu, expected a request for at most %I64d bytes, got a request for %I64d bytes",

		             (unsigned long) tif->tif_row,

		             (signed __int64) tif->tif_rawcc,

		             (signed __int64) cc);

#else

		TIFFErrorExt(tif->tif_clientdata, module,

"Not enough data for scanline %lu, expected a request for at most %lld bytes, got a request for %lld bytes",

		             (unsigned long) tif->tif_row,

		             (signed long long) tif->tif_rawcc,

		             (signed long long) cc);

#endif

		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_fixuptags = DumpFixupTags;  

	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);

}

/*

 * Local Variables:

 * mode: c

 * c-basic-offset: 8

 * fill-column: 78

 * End:

 */