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- #ifndef lint
- static char rcsid[] = "$Header: /usr/people/sam/tiff/libtiff/RCS/tif_compress.c,v 1.26 92/02/10 19:06:13 sam Exp $";
- #endif
-
- /*
- * Copyright (c) 1988, 1989, 1990, 1991, 1992 Sam Leffler
- * Copyright (c) 1991, 1992 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
- *
- * Compression Scheme Configuration Support.
- */
- #include "tiffioP.h"
-
- #if USE_PROTOTYPES
- extern int TIFFInitDumpMode(TIFF*);
- #ifdef PACKBITS_SUPPORT
- extern int TIFFInitPackBits(TIFF*);
- #endif
- #ifdef CCITT_SUPPORT
- extern int TIFFInitCCITTRLE(TIFF*), TIFFInitCCITTRLEW(TIFF*);
- extern int TIFFInitCCITTFax3(TIFF*), TIFFInitCCITTFax4(TIFF*);
- #endif
- #ifdef THUNDER_SUPPORT
- extern int TIFFInitThunderScan(TIFF*);
- #endif
- #ifdef NEXT_SUPPORT
- extern int TIFFInitNeXT(TIFF*);
- #endif
- #ifdef LZW_SUPPORT
- extern int TIFFInitLZW(TIFF*);
- #endif
- #ifdef JPEG_SUPPORT
- extern int TIFFInitJPEG(TIFF*);
- #endif
- #else
- extern int TIFFInitDumpMode();
- #ifdef PACKBITS_SUPPORT
- extern int TIFFInitPackBits();
- #endif
- #ifdef CCITT_SUPPORT
- extern int TIFFInitCCITTRLE(), TIFFInitCCITTRLEW();
- extern int TIFFInitCCITTFax3(), TIFFInitCCITTFax4();
- #endif
- #ifdef THUNDER_SUPPORT
- extern int TIFFInitThunderScan();
- #endif
- #ifdef NEXT_SUPPORT
- extern int TIFFInitNeXT();
- #endif
- #ifdef LZW_SUPPORT
- extern int TIFFInitLZW();
- #endif
- #ifdef JPEG_SUPPORT
- extern int TIFFInitJPEG();
- #endif
- #endif
-
- struct cscheme {
- char* name;
- int scheme;
- int (*init)();
- };
- static const struct cscheme CompressionSchemes[] = {
- { "Null", COMPRESSION_NONE, TIFFInitDumpMode },
- #ifdef LZW_SUPPORT
- { "LZW", COMPRESSION_LZW, TIFFInitLZW },
- #endif
- #ifdef PACKBITS_SUPPORT
- { "PackBits", COMPRESSION_PACKBITS, TIFFInitPackBits },
- #endif
- #ifdef THUNDER_SUPPORT
- { "ThunderScan", COMPRESSION_THUNDERSCAN,TIFFInitThunderScan },
- #endif
- #ifdef NEXT_SUPPORT
- { "NeXT", COMPRESSION_NEXT, TIFFInitNeXT },
- #endif
- #ifdef JPEG_SUPPORT
- { "JPEG", COMPRESSION_JPEG, TIFFInitJPEG },
- #endif
- #ifdef CCITT_SUPPORT
- { "CCITT RLE", COMPRESSION_CCITTRLE, TIFFInitCCITTRLE },
- { "CCITT RLE/W", COMPRESSION_CCITTRLEW, TIFFInitCCITTRLEW },
- { "CCITT Group3", COMPRESSION_CCITTFAX3, TIFFInitCCITTFax3 },
- { "CCITT Group4", COMPRESSION_CCITTFAX4, TIFFInitCCITTFax4 },
- #endif
- };
- #define NSCHEMES (sizeof (CompressionSchemes) / sizeof (CompressionSchemes[0]))
-
- static struct cscheme const *
- findScheme(scheme)
- int scheme;
- {
- register struct cscheme const *c;
-
- for (c = CompressionSchemes; c < &CompressionSchemes[NSCHEMES]; c++)
- if (c->scheme == scheme)
- return (c);
- return ((struct cscheme const *)0);
- }
-
- static int
- TIFFNoEncode(tif, method)
- TIFF *tif;
- char *method;
- {
- struct cscheme const *c = findScheme(tif->tif_dir.td_compression);
- TIFFError(tif->tif_name,
- "%s %s encoding is not implemented", c->name, method);
- return (-1);
- }
-
- int
- TIFFNoRowEncode(tif, pp, cc, s)
- TIFF *tif;
- u_char *pp;
- int cc;
- u_int s;
- {
- return (TIFFNoEncode(tif, "scanline"));
- }
-
- int
- TIFFNoStripEncode(tif, pp, cc, s)
- TIFF *tif;
- u_char *pp;
- int cc;
- u_int s;
- {
- return (TIFFNoEncode(tif, "strip"));
- }
-
- int
- TIFFNoTileEncode(tif, pp, cc, s)
- TIFF *tif;
- u_char *pp;
- int cc;
- u_int s;
- {
- return (TIFFNoEncode(tif, "tile"));
- }
-
- int
- TIFFNoDecode(tif, method)
- TIFF *tif;
- char *method;
- {
- struct cscheme const *c = findScheme(tif->tif_dir.td_compression);
- TIFFError(tif->tif_name,
- "%s %s decoding is not implemented", c->name, method);
- return (-1);
- }
-
- int
- TIFFNoRowDecode(tif, pp, cc, s)
- TIFF *tif;
- u_char *pp;
- int cc;
- u_int s;
- {
- return (TIFFNoDecode(tif, "scanline"));
- }
-
- int
- TIFFNoStripDecode(tif, pp, cc, s)
- TIFF *tif;
- u_char *pp;
- int cc;
- u_int s;
- {
- return (TIFFNoDecode(tif, "strip"));
- }
-
- int
- TIFFNoTileDecode(tif, pp, cc, s)
- TIFF *tif;
- u_char *pp;
- int cc;
- u_int s;
- {
- return (TIFFNoDecode(tif, "tile"));
- }
-
- TIFFSetCompressionScheme(tif, scheme)
- TIFF *tif;
- int scheme;
- {
- struct cscheme const *c = findScheme(scheme);
-
- if (!c) {
- TIFFError(tif->tif_name,
- "Unknown data compression algorithm %u (0x%x)",
- scheme, scheme);
- return (0);
- }
- tif->tif_predecode = NULL;
- tif->tif_decoderow = TIFFNoRowDecode;
- tif->tif_decodestrip = TIFFNoStripDecode;
- tif->tif_decodetile = TIFFNoTileDecode;
- tif->tif_preencode = NULL;
- tif->tif_postencode = NULL;
- tif->tif_encoderow = TIFFNoRowEncode;
- tif->tif_encodestrip = TIFFNoStripEncode;
- tif->tif_encodetile = TIFFNoTileEncode;
- tif->tif_close = NULL;
- tif->tif_seek = NULL;
- tif->tif_cleanup = NULL;
- tif->tif_flags &= ~TIFF_NOBITREV;
- tif->tif_options = 0;
- return ((*c->init)(tif));
- }
-