/* Id */

/*
 * 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;
}