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 */ 145