dll/3rdparty/libtiff/tif_dumpmode.c

   1 /* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.15 2015-12-12 18:04:26 erouault 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
  33 #include <precomp.h>
  34
  35 static int
  36 DumpFixupTags(TIFF* tif)
  37 {
  38         (void) tif;
  39         return (1);
  40 }
  41
  42 /*
  43  * Encode a hunk of pixels.
  44  */
  45 static int
  46 DumpModeEncode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 s)
  47 {
  48         (void) s;
  49         while (cc > 0) {
  50                 tmsize_t n;
  51
  52                 n = cc;
  53                 if (tif->tif_rawcc + n > tif->tif_rawdatasize)
  54                         n = tif->tif_rawdatasize - tif->tif_rawcc;
  55
  56                 assert( n > 0 );
  57
  58                 /*
  59                  * Avoid copy if client has setup raw
  60                  * data buffer to avoid extra copy.
  61                  */
  62                 if (tif->tif_rawcp != pp)
  63                         _TIFFmemcpy(tif->tif_rawcp, pp, n);
  64                 tif->tif_rawcp += n;
  65                 tif->tif_rawcc += n;
  66                 pp += n;
  67                 cc -= n;
  68                 if (tif->tif_rawcc >= tif->tif_rawdatasize &&
  69                     !TIFFFlushData1(tif))
  70                         return (0);
  71         }
  72         return (1);
  73 }
  74
  75 /*
  76  * Decode a hunk of pixels.
  77  */
  78 static int
  79 DumpModeDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s)
  80 {
  81         static const char module[] = "DumpModeDecode";
  82         (void) s;
  83         if (tif->tif_rawcc < cc) {
  84 #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
  85                 TIFFErrorExt(tif->tif_clientdata, module,
  86 "Not enough data for scanline %lu, expected a request for at most %I64d bytes, got a request for %I64d bytes",
  87                              (unsigned long) tif->tif_row,
  88                              (signed __int64) tif->tif_rawcc,
  89                              (signed __int64) cc);
  90 #else
  91                 TIFFErrorExt(tif->tif_clientdata, module,
  92 "Not enough data for scanline %lu, expected a request for at most %lld bytes, got a request for %lld bytes",
  93                              (unsigned long) tif->tif_row,
  94                              (signed long long) tif->tif_rawcc,
  95                              (signed long long) cc);
  96 #endif
  97                 return (0);
  98         }
  99         /*
 100          * Avoid copy if client has setup raw
 101          * data buffer to avoid extra copy.
 102          */
 103         if (tif->tif_rawcp != buf)
 104                 _TIFFmemcpy(buf, tif->tif_rawcp, cc);
 105         tif->tif_rawcp += cc;
 106         tif->tif_rawcc -= cc;
 107         return (1);
 108 }
 109
 110 /*
 111  * Seek forwards nrows in the current strip.
 112  */
 113 static int
 114 DumpModeSeek(TIFF* tif, uint32 nrows)
 115 {
 116         tif->tif_rawcp += nrows * tif->tif_scanlinesize;
 117         tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
 118         return (1);
 119 }
 120
 121 /*
 122  * Initialize dump mode.
 123  */
 124 int
 125 TIFFInitDumpMode(TIFF* tif, int scheme)
 126 {
 127         (void) scheme;
 128         tif->tif_fixuptags = DumpFixupTags;
 129         tif->tif_decoderow = DumpModeDecode;
 130         tif->tif_decodestrip = DumpModeDecode;
 131         tif->tif_decodetile = DumpModeDecode;
 132         tif->tif_encoderow = DumpModeEncode;
 133         tif->tif_encodestrip = DumpModeEncode;
 134         tif->tif_encodetile = DumpModeEncode;
 135         tif->tif_seek = DumpModeSeek;
 136         return (1);
 137 }
 138 /*
 139  * Local Variables:
 140  * mode: c
 141  * c-basic-offset: 8
 142  * fill-column: 78
 143  * End:
 144  */