/*

 * 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 (0);

  }

  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:

 */