tif_codec.c
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上传日期:2014-07-20
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文件大小:5k
- /* $Id: tif_codec.c,v 1.10 2005/12/21 12:23:13 joris Exp $ */
- /*
- * Copyright (c) 1988-1997 Sam Leffler
- * Copyright (c) 1991-1997 Silicon Graphics, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the names of
- * Sam Leffler and Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Sam Leffler and Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
- /*
- * TIFF Library
- *
- * Builtin Compression Scheme Configuration Support.
- */
- #include "tiffiop.h"
- static int NotConfigured(TIFF*, int);
- #ifndef LZW_SUPPORT
- #define TIFFInitLZW NotConfigured
- #endif
- #ifndef PACKBITS_SUPPORT
- #define TIFFInitPackBits NotConfigured
- #endif
- #ifndef THUNDER_SUPPORT
- #define TIFFInitThunderScan NotConfigured
- #endif
- #ifndef NEXT_SUPPORT
- #define TIFFInitNeXT NotConfigured
- #endif
- #ifndef JPEG_SUPPORT
- #define TIFFInitJPEG NotConfigured
- #endif
- #ifndef OJPEG_SUPPORT
- #define TIFFInitOJPEG NotConfigured
- #endif
- #ifndef CCITT_SUPPORT
- #define TIFFInitCCITTRLE NotConfigured
- #define TIFFInitCCITTRLEW NotConfigured
- #define TIFFInitCCITTFax3 NotConfigured
- #define TIFFInitCCITTFax4 NotConfigured
- #endif
- #ifndef JBIG_SUPPORT
- #define TIFFInitJBIG NotConfigured
- #endif
- #ifndef ZIP_SUPPORT
- #define TIFFInitZIP NotConfigured
- #endif
- #ifndef PIXARLOG_SUPPORT
- #define TIFFInitPixarLog NotConfigured
- #endif
- #ifndef LOGLUV_SUPPORT
- #define TIFFInitSGILog NotConfigured
- #endif
- /*
- * Compression schemes statically built into the library.
- */
- #ifdef VMS
- const TIFFCodec _TIFFBuiltinCODECS[] = {
- #else
- TIFFCodec _TIFFBuiltinCODECS[] = {
- #endif
- { "None", COMPRESSION_NONE, TIFFInitDumpMode },
- { "LZW", COMPRESSION_LZW, TIFFInitLZW },
- { "PackBits", COMPRESSION_PACKBITS, TIFFInitPackBits },
- { "ThunderScan", COMPRESSION_THUNDERSCAN,TIFFInitThunderScan },
- { "NeXT", COMPRESSION_NEXT, TIFFInitNeXT },
- { "JPEG", COMPRESSION_JPEG, TIFFInitJPEG },
- { "Old-style JPEG", COMPRESSION_OJPEG, TIFFInitOJPEG },
- { "CCITT RLE", COMPRESSION_CCITTRLE, TIFFInitCCITTRLE },
- { "CCITT RLE/W", COMPRESSION_CCITTRLEW, TIFFInitCCITTRLEW },
- { "CCITT Group 3", COMPRESSION_CCITTFAX3, TIFFInitCCITTFax3 },
- { "CCITT Group 4", COMPRESSION_CCITTFAX4, TIFFInitCCITTFax4 },
- { "ISO JBIG", COMPRESSION_JBIG, TIFFInitJBIG },
- { "Deflate", COMPRESSION_DEFLATE, TIFFInitZIP },
- { "AdobeDeflate", COMPRESSION_ADOBE_DEFLATE , TIFFInitZIP },
- { "PixarLog", COMPRESSION_PIXARLOG, TIFFInitPixarLog },
- { "SGILog", COMPRESSION_SGILOG, TIFFInitSGILog },
- { "SGILog24", COMPRESSION_SGILOG24, TIFFInitSGILog },
- { NULL, 0, NULL }
- };
- static int
- _notConfigured(TIFF* tif)
- {
- const TIFFCodec* c = TIFFFindCODEC(tif->tif_dir.td_compression);
- TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
- "%s compression support is not configured", c->name);
- return (0);
- }
- static int
- NotConfigured(TIFF* tif, int scheme)
- {
- (void) scheme;
-
- tif->tif_decodestatus = FALSE;
- tif->tif_setupdecode = _notConfigured;
- tif->tif_encodestatus = FALSE;
- tif->tif_setupencode = _notConfigured;
- return (1);
- }
- /************************************************************************/
- /* TIFFIsCODECConfigured() */
- /************************************************************************/
- /**
- * Check whether we have working codec for the specific coding scheme.
- *
- * @return returns 1 if the codec is configured and working. Otherwise
- * 0 will be returned.
- */
- int
- TIFFIsCODECConfigured(uint16 scheme)
- {
- const TIFFCodec* codec = TIFFFindCODEC(scheme);
- if(codec == NULL) {
- return 0;
- }
- if(codec->init == NULL) {
- return 0;
- }
- if(codec->init != NotConfigured){
- return 1;
- }
- return 0;
- }