int
TIFFInitZIP(TIFF* tif, int scheme)
{
ZIPState* sp;
assert( (scheme == COMPRESSION_DEFLATE)
|| (scheme == COMPRESSION_ADOBE_DEFLATE));
/*
* Allocate state block so tag methods have storage to record values.
*/
tif->tif_data = (tidata_t) _TIFFmalloc(sizeof (ZIPState));
if (tif->tif_data == NULL)
goto bad;
sp = ZState(tif);
sp->stream.zalloc = NULL;
sp->stream.zfree = NULL;
sp->stream.opaque = NULL;
sp->stream.data_type = Z_BINARY;
/*
* Merge codec-specific tag information and
* override parent get/set field methods.
*/
TIFFMergeFieldInfo(tif, zipFieldInfo, N(zipFieldInfo));
sp->vgetparent = tif->tif_tagmethods.vgetfield;
tif->tif_tagmethods.vgetfield = ZIPVGetField;/* hook for codec tags */
sp->vsetparent = tif->tif_tagmethods.vsetfield;
tif->tif_tagmethods.vsetfield = ZIPVSetField;/* hook for codec tags */
/* Default values for codec-specific fields */
sp->zipquality = Z_DEFAULT_COMPRESSION; /* default comp. level */
sp->state = 0;
/*
* Install codec methods.
*/
tif->tif_setupdecode = ZIPSetupDecode;
tif->tif_predecode = ZIPPreDecode;
tif->tif_decoderow = ZIPDecode;
tif->tif_decodestrip = ZIPDecode;
tif->tif_decodetile = ZIPDecode;
#ifdef PDFLIB_TIFFWRITE_SUPPORT
tif->tif_setupencode = ZIPSetupEncode;
tif->tif_preencode = ZIPPreEncode;
tif->tif_postencode = ZIPPostEncode;
tif->tif_encoderow = ZIPEncode;
tif->tif_encodestrip = ZIPEncode;
tif->tif_encodetile = ZIPEncode;
#endif /* PDFLIB_TIFFWRITE_SUPPORT */
tif->tif_cleanup = ZIPCleanup;
/*
* Setup predictor setup.
*/
(void) TIFFPredictorInit(tif);
return (1);
bad:
_TIFFError(tif, "TIFFInitZIP", "No space for ZIP state block");
return (0);
}
static void
ZIPCleanup(TIFF* tif)
{
ZIPState* sp = ZState(tif);
if (sp) {
if (tif->tif_mode == O_RDONLY)
inflateEnd(&sp->stream);
else
deflateEnd(&sp->stream);
_TIFFfree(sp);
tif->tif_data = NULL;
}
}
static int
ZIPVGetField(TIFF* tif, ttag_t tag, va_list ap) {
ZIPState* sp = ZState(tif);
switch (tag) {
case TIFFTAG_ZIPQUALITY:
*va_arg(ap, int*) = sp->zipquality;
break;
default:
return (*sp->vgetparent)(tif, tag, ap);
}
return (1);
}
static void
ZIPCleanup(TIFF* tif)
{
ZIPState* sp = ZState(tif);
if (sp) {
if (sp->state&ZSTATE_INIT) {
/* NB: avoid problems in the library */
if (tif->tif_mode == O_RDONLY)
inflateEnd(&sp->stream);
else
deflateEnd(&sp->stream);
}
_TIFFfree(sp);
tif->tif_data = NULL;
}
}
static int
ZIPVSetField(TIFF* tif, ttag_t tag, va_list ap) {
ZIPState* sp = ZState(tif);
static const char module[] = "ZIPVSetField";
switch (tag) {
case TIFFTAG_ZIPQUALITY:
sp->zipquality = va_arg(ap, int);
if (tif->tif_mode != O_RDONLY && (sp->state & ZSTATE_INIT)) {
if (deflateParams(&sp->stream,
sp->zipquality, Z_DEFAULT_STRATEGY) != Z_OK) {
TIFFError(module, "%s: zlib error: %s",
tif->tif_name, sp->stream.msg);
return (0);
}
}
return (1);
default:
return (*sp->vsetparent)(tif, tag, ap);
}
/*NOTREACHED*/
}
static int
ZIPVSetField(TIFF* tif, uint32 tag, va_list ap)
{
static const char module[] = "ZIPVSetField";
ZIPState* sp = ZState(tif);
switch (tag) {
case TIFFTAG_ZIPQUALITY:
sp->zipquality = (int) va_arg(ap, int);
if ( sp->state&ZSTATE_INIT_ENCODE ) {
if (deflateParams(&sp->stream,
sp->zipquality, Z_DEFAULT_STRATEGY) != Z_OK) {
TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
SAFE_MSG(sp));
return (0);
}
}
return (1);
default:
return (*sp->vsetparent)(tif, tag, ap);
}
/*NOTREACHED*/
}
static void
ZIPCleanup(TIFF* tif)
{
ZIPState* sp = ZState(tif);
assert(sp != 0);
(void)TIFFPredictorCleanup(tif);
tif->tif_tagmethods.vgetfield = sp->vgetparent;
tif->tif_tagmethods.vsetfield = sp->vsetparent;
if (sp->state & ZSTATE_INIT_ENCODE) {
deflateEnd(&sp->stream);
sp->state = 0;
} else if( sp->state & ZSTATE_INIT_DECODE) {
inflateEnd(&sp->stream);
sp->state = 0;
}
_TIFFfree(sp);
tif->tif_data = NULL;
_TIFFSetDefaultCompressionState(tif);
}
static void
ZIPCleanup(TIFF* tif)
{
ZIPState* sp = ZState(tif);
assert(sp != 0);
(void)TIFFPredictorCleanup(tif);
tif->tif_tagmethods.vgetfield = sp->vgetparent;
tif->tif_tagmethods.vsetfield = sp->vsetparent;
if (sp->state&ZSTATE_INIT) {
/* NB: avoid problems in the library */
if (tif->tif_mode == O_RDONLY)
inflateEnd(&sp->stream);
else
deflateEnd(&sp->stream);
}
_TIFFfree(sp);
tif->tif_data = NULL;
_TIFFSetDefaultCompressionState(tif);
}
int
TIFFInitZIP(TIFF* tif, int scheme)
{
static const char module[] = "TIFFInitZIP";
ZIPState* sp;
assert( (scheme == COMPRESSION_DEFLATE)
|| (scheme == COMPRESSION_ADOBE_DEFLATE));
/*
* Merge codec-specific tag information.
*/
if (!_TIFFMergeFieldInfo(tif, zipFieldInfo,
TIFFArrayCount(zipFieldInfo))) {
TIFFErrorExt(tif->tif_clientdata, module,
"Merging Deflate codec-specific tags failed");
return 0;
}
/*
* Allocate state block so tag methods have storage to record values.
*/
tif->tif_data = (tidata_t) _TIFFmalloc(sizeof (ZIPState));
if (tif->tif_data == NULL)
goto bad;
sp = ZState(tif);
sp->stream.zalloc = NULL;
sp->stream.zfree = NULL;
sp->stream.opaque = NULL;
sp->stream.data_type = Z_BINARY;
/*
* Override parent get/set field methods.
*/
sp->vgetparent = tif->tif_tagmethods.vgetfield;
tif->tif_tagmethods.vgetfield = ZIPVGetField; /* hook for codec tags */
sp->vsetparent = tif->tif_tagmethods.vsetfield;
tif->tif_tagmethods.vsetfield = ZIPVSetField; /* hook for codec tags */
/* Default values for codec-specific fields */
sp->zipquality = Z_DEFAULT_COMPRESSION; /* default comp. level */
sp->state = 0;
/*
* Install codec methods.
*/
tif->tif_setupdecode = ZIPSetupDecode;
tif->tif_predecode = ZIPPreDecode;
tif->tif_decoderow = ZIPDecode;
tif->tif_decodestrip = ZIPDecode;
tif->tif_decodetile = ZIPDecode;
tif->tif_setupencode = ZIPSetupEncode;
tif->tif_preencode = ZIPPreEncode;
tif->tif_postencode = ZIPPostEncode;
tif->tif_encoderow = ZIPEncode;
tif->tif_encodestrip = ZIPEncode;
tif->tif_encodetile = ZIPEncode;
tif->tif_cleanup = ZIPCleanup;
/*
* Setup predictor setup.
*/
(void) TIFFPredictorInit(tif);
return (1);
bad:
TIFFErrorExt(tif->tif_clientdata, module,
"No space for ZIP state block");
return (0);
}
