1 /* 2 * Copyright (c) 1988-1997 Sam Leffler 3 * Copyright (c) 1991-1997 Silicon Graphics, Inc. 4 * 5 * Permission to use, copy, modify, distribute, and sell this software and 6 * its documentation for any purpose is hereby granted without fee, provided 7 * that (i) the above copyright notices and this permission notice appear in 8 * all copies of the software and related documentation, and (ii) the names of 9 * Sam Leffler and Silicon Graphics may not be used in any advertising or 10 * publicity relating to the software without the specific, prior written 11 * permission of Sam Leffler and Silicon Graphics. 12 * 13 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 14 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 15 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR 18 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, 19 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 20 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 21 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 22 * OF THIS SOFTWARE. 23 */ 24 25 /* 26 * TIFF Library. 27 * 28 * "Null" Compression Algorithm Support. 29 */ 30 31 #include <precomp.h> 32 33 static int 34 DumpFixupTags(TIFF* tif) 35 { 36 (void) tif; 37 return (1); 38 } 39 40 /* 41 * Encode a hunk of pixels. 42 */ 43 static int 44 DumpModeEncode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 s) 45 { 46 (void) s; 47 while (cc > 0) { 48 tmsize_t n; 49 50 n = cc; 51 if (tif->tif_rawcc + n > tif->tif_rawdatasize) 52 n = tif->tif_rawdatasize - tif->tif_rawcc; 53 54 assert( n > 0 ); 55 56 /* 57 * Avoid copy if client has setup raw 58 * data buffer to avoid extra copy. 59 */ 60 if (tif->tif_rawcp != pp) 61 _TIFFmemcpy(tif->tif_rawcp, pp, n); 62 tif->tif_rawcp += n; 63 tif->tif_rawcc += n; 64 pp += n; 65 cc -= n; 66 if (tif->tif_rawcc >= tif->tif_rawdatasize && 67 !TIFFFlushData1(tif)) 68 return (0); 69 } 70 return (1); 71 } 72 73 /* 74 * Decode a hunk of pixels. 75 */ 76 static int 77 DumpModeDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s) 78 { 79 static const char module[] = "DumpModeDecode"; 80 (void) s; 81 if (tif->tif_rawcc < cc) { 82 #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) 83 TIFFErrorExt(tif->tif_clientdata, module, 84 "Not enough data for scanline %lu, expected a request for at most %I64d bytes, got a request for %I64d bytes", 85 (unsigned long) tif->tif_row, 86 (signed __int64) tif->tif_rawcc, 87 (signed __int64) cc); 88 #else 89 TIFFErrorExt(tif->tif_clientdata, module, 90 "Not enough data for scanline %lu, expected a request for at most %lld bytes, got a request for %lld bytes", 91 (unsigned long) tif->tif_row, 92 (signed long long) tif->tif_rawcc, 93 (signed long long) cc); 94 #endif 95 return (0); 96 } 97 /* 98 * Avoid copy if client has setup raw 99 * data buffer to avoid extra copy. 100 */ 101 if (tif->tif_rawcp != buf) 102 _TIFFmemcpy(buf, tif->tif_rawcp, cc); 103 tif->tif_rawcp += cc; 104 tif->tif_rawcc -= cc; 105 return (1); 106 } 107 108 /* 109 * Seek forwards nrows in the current strip. 110 */ 111 static int 112 DumpModeSeek(TIFF* tif, uint32 nrows) 113 { 114 tif->tif_rawcp += nrows * tif->tif_scanlinesize; 115 tif->tif_rawcc -= nrows * tif->tif_scanlinesize; 116 return (1); 117 } 118 119 /* 120 * Initialize dump mode. 121 */ 122 int 123 TIFFInitDumpMode(TIFF* tif, int scheme) 124 { 125 (void) scheme; 126 tif->tif_fixuptags = DumpFixupTags; 127 tif->tif_decoderow = DumpModeDecode; 128 tif->tif_decodestrip = DumpModeDecode; 129 tif->tif_decodetile = DumpModeDecode; 130 tif->tif_encoderow = DumpModeEncode; 131 tif->tif_encodestrip = DumpModeEncode; 132 tif->tif_encodetile = DumpModeEncode; 133 tif->tif_seek = DumpModeSeek; 134 return (1); 135 } 136 /* 137 * Local Variables: 138 * mode: c 139 * c-basic-offset: 8 140 * fill-column: 78 141 * End: 142 */ 143