1/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.5.2.2 2010-06-08 18:50:42 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/* 35 * Encode a hunk of pixels. 36 */ 37static int 38DumpModeEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s) 39{ 40 (void) s; 41 while (cc > 0) { 42 tsize_t n; 43 44 n = cc; 45 if (tif->tif_rawcc + n > tif->tif_rawdatasize) 46 n = tif->tif_rawdatasize - tif->tif_rawcc; 47 48 assert( n > 0 ); 49 50 /* 51 * Avoid copy if client has setup raw 52 * data buffer to avoid extra copy. 53 */ 54 if (tif->tif_rawcp != pp) 55 _TIFFmemcpy(tif->tif_rawcp, pp, n); 56 tif->tif_rawcp += n; 57 tif->tif_rawcc += n; 58 pp += n; 59 cc -= n; 60 if (tif->tif_rawcc >= tif->tif_rawdatasize && 61 !TIFFFlushData1(tif)) 62 return (-1); 63 } 64 return (1); 65} 66 67/* 68 * Decode a hunk of pixels. 69 */ 70static int 71DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s) 72{ 73 (void) s; 74/* fprintf(stderr,"DumpModeDecode: scanline %ld, expected %ld bytes, got %ld bytes\n", */ 75/* (long) tif->tif_row, (long) tif->tif_rawcc, (long) cc); */ 76 if (tif->tif_rawcc < cc) { 77 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, 78 "DumpModeDecode: Not enough data for scanline %d", 79 tif->tif_row); 80 return (0); 81 } 82 /* 83 * Avoid copy if client has setup raw 84 * data buffer to avoid extra copy. 85 */ 86 if (tif->tif_rawcp != buf) 87 _TIFFmemcpy(buf, tif->tif_rawcp, cc); 88 tif->tif_rawcp += cc; 89 tif->tif_rawcc -= cc; 90 return (1); 91} 92 93/* 94 * Seek forwards nrows in the current strip. 95 */ 96static int 97DumpModeSeek(TIFF* tif, uint32 nrows) 98{ 99 tif->tif_rawcp += nrows * tif->tif_scanlinesize; 100 tif->tif_rawcc -= nrows * tif->tif_scanlinesize; 101 return (1); 102} 103 104/* 105 * Initialize dump mode. 106 */ 107int 108TIFFInitDumpMode(TIFF* tif, int scheme) 109{ 110 (void) scheme; 111 tif->tif_decoderow = DumpModeDecode; 112 tif->tif_decodestrip = DumpModeDecode; 113 tif->tif_decodetile = DumpModeDecode; 114 tif->tif_encoderow = DumpModeEncode; 115 tif->tif_encodestrip = DumpModeEncode; 116 tif->tif_encodetile = DumpModeEncode; 117 tif->tif_seek = DumpModeSeek; 118 return (1); 119} 120/* 121 * Local Variables: 122 * mode: c 123 * c-basic-offset: 8 124 * fill-column: 78 125 * End: 126 */ 127