projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 8414a40c VZ |
1 | /* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.4 2005/12/21 12:23:13 joris 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 | */ | |
| 37 | static int | |
| 38 | DumpModeEncode(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 | */ | |
| 70 | static int | |
| 71 | DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s) | |
| 72 | { | |
| 73 | (void) s; | |
| 74 | if (tif->tif_rawcc < cc) { | |
| 75 | TIFFErrorExt(tif->tif_clientdata, tif->tif_name, | |
| 76 | "DumpModeDecode: Not enough data for scanline %d", | |
| 77 | tif->tif_row); | |
| 78 | return (0); | |
| 79 | } | |
| 80 | /* | |
| 81 | * Avoid copy if client has setup raw | |
| 82 | * data buffer to avoid extra copy. | |
| 83 | */ | |
| 84 | if (tif->tif_rawcp != buf) | |
| 85 | _TIFFmemcpy(buf, tif->tif_rawcp, cc); | |
| 86 | tif->tif_rawcp += cc; | |
| 87 | tif->tif_rawcc -= cc; | |
| 88 | return (1); | |
| 89 | } | |
| 90 | ||
| 91 | /* | |
| 92 | * Seek forwards nrows in the current strip. | |
| 93 | */ | |
| 94 | static int | |
| 95 | DumpModeSeek(TIFF* tif, uint32 nrows) | |
| 96 | { | |
| 97 | tif->tif_rawcp += nrows * tif->tif_scanlinesize; | |
| 98 | tif->tif_rawcc -= nrows * tif->tif_scanlinesize; | |
| 99 | return (1); | |
| 100 | } | |
| 101 | ||
| 102 | /* | |
| 103 | * Initialize dump mode. | |
| 104 | */ | |
| 105 | int | |
| 106 | TIFFInitDumpMode(TIFF* tif, int scheme) | |
| 107 | { | |
| 108 | (void) scheme; | |
| 109 | tif->tif_decoderow = DumpModeDecode; | |
| 110 | tif->tif_decodestrip = DumpModeDecode; | |
| 111 | tif->tif_decodetile = DumpModeDecode; | |
| 112 | tif->tif_encoderow = DumpModeEncode; | |
| 113 | tif->tif_encodestrip = DumpModeEncode; | |
| 114 | tif->tif_encodetile = DumpModeEncode; | |
| 115 | tif->tif_seek = DumpModeSeek; | |
| 116 | return (1); | |
| 117 | } |