static void
LZWCleanup(TIFF* tif)
{
if (tif->tif_data) {
if (LZWState(tif)->rw_mode == O_RDONLY) {
if (DecoderState(tif)->dec_codetab)
_TIFFfree(DecoderState(tif)->dec_codetab);
} else {
if (EncoderState(tif)->enc_hashtab)
_TIFFfree(EncoderState(tif)->enc_hashtab);
}
_TIFFfree(tif->tif_data);
tif->tif_data = NULL;
}
}
int
TIFFInitLZW(TIFF* tif, int scheme)
{
assert(scheme == COMPRESSION_LZW);
/*
* Allocate state block so tag methods have storage to record values.
*/
if (tif->tif_mode == O_RDONLY) {
tif->tif_data = (tidata_t) _TIFFmalloc(sizeof (LZWDecodeState));
if (tif->tif_data == NULL)
goto bad;
DecoderState(tif)->dec_codetab = NULL;
DecoderState(tif)->dec_decode = NULL;
} else {
tif->tif_data = (tidata_t) _TIFFmalloc(sizeof (LZWEncodeState));
if (tif->tif_data == NULL)
goto bad;
EncoderState(tif)->enc_hashtab = NULL;
}
LZWState(tif)->rw_mode = tif->tif_mode;
/*
* Install codec methods.
*/
tif->tif_setupdecode = LZWSetupDecode;
tif->tif_predecode = LZWPreDecode;
tif->tif_decoderow = LZWDecode;
tif->tif_decodestrip = LZWDecode;
tif->tif_decodetile = LZWDecode;
tif->tif_setupencode = LZWSetupEncode;
tif->tif_preencode = LZWPreEncode;
tif->tif_postencode = LZWPostEncode;
tif->tif_encoderow = LZWEncode;
tif->tif_encodestrip = LZWEncode;
tif->tif_encodetile = LZWEncode;
tif->tif_cleanup = LZWCleanup;
/*
* Setup predictor setup.
*/
(void) TIFFPredictorInit(tif);
return (1);
bad:
TIFFError("TIFFInitLZW", "No space for LZW state block");
return (0);
}
int
TIFFInitLZW(TIFF* tif, int scheme)
{
static const char module[] = "TIFFInitLZW";
assert(scheme == COMPRESSION_LZW);
/*
* Allocate state block so tag methods have storage to record values.
*/
tif->tif_data = (uint8*) _TIFFmalloc(sizeof (LZWCodecState));
if (tif->tif_data == NULL)
goto bad;
DecoderState(tif)->dec_codetab = NULL;
DecoderState(tif)->dec_decode = NULL;
EncoderState(tif)->enc_hashtab = NULL;
LZWState(tif)->rw_mode = tif->tif_mode;
/*
* Install codec methods.
*/
tif->tif_fixuptags = LZWFixupTags;
tif->tif_setupdecode = LZWSetupDecode;
tif->tif_predecode = LZWPreDecode;
tif->tif_decoderow = LZWDecode;
tif->tif_decodestrip = LZWDecode;
tif->tif_decodetile = LZWDecode;
tif->tif_setupencode = LZWSetupEncode;
tif->tif_preencode = LZWPreEncode;
tif->tif_postencode = LZWPostEncode;
tif->tif_encoderow = LZWEncode;
tif->tif_encodestrip = LZWEncode;
tif->tif_encodetile = LZWEncode;
tif->tif_cleanup = LZWCleanup;
/*
* Setup predictor setup.
*/
(void) TIFFPredictorInit(tif);
return (1);
bad:
TIFFErrorExt(tif->tif_clientdata, module,
"No space for LZW state block");
return (0);
}
