src/tiff/libtiff/tif_dumpmode.c

   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  */