470 lines
14 KiB
C
470 lines
14 KiB
C
/* $Id: tif_zip.c,v 1.31 2011-01-06 16:00:23 fwarmerdam Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1995-1997 Sam Leffler
|
|
* Copyright (c) 1995-1997 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.
|
|
*/
|
|
|
|
#include "tiffiop.h"
|
|
#ifdef ZIP_SUPPORT
|
|
/*
|
|
* TIFF Library.
|
|
*
|
|
* ZIP (aka Deflate) Compression Support
|
|
*
|
|
* This file is simply an interface to the zlib library written by
|
|
* Jean-loup Gailly and Mark Adler. You must use version 1.0 or later
|
|
* of the library: this code assumes the 1.0 API and also depends on
|
|
* the ability to write the zlib header multiple times (one per strip)
|
|
* which was not possible with versions prior to 0.95. Note also that
|
|
* older versions of this codec avoided this bug by supressing the header
|
|
* entirely. This means that files written with the old library cannot
|
|
* be read; they should be converted to a different compression scheme
|
|
* and then reconverted.
|
|
*
|
|
* The data format used by the zlib library is described in the files
|
|
* zlib-3.1.doc, deflate-1.1.doc and gzip-4.1.doc, available in the
|
|
* directory ftp://ftp.uu.net/pub/archiving/zip/doc. The library was
|
|
* last found at ftp://ftp.uu.net/pub/archiving/zip/zlib/zlib-0.99.tar.gz.
|
|
*/
|
|
#include "tif_predict.h"
|
|
#include "zlib.h"
|
|
|
|
#include <stdio.h>
|
|
|
|
/*
|
|
* Sigh, ZLIB_VERSION is defined as a string so there's no
|
|
* way to do a proper check here. Instead we guess based
|
|
* on the presence of #defines that were added between the
|
|
* 0.95 and 1.0 distributions.
|
|
*/
|
|
#if !defined(Z_NO_COMPRESSION) || !defined(Z_DEFLATED)
|
|
#error "Antiquated ZLIB software; you must use version 1.0 or later"
|
|
#endif
|
|
|
|
/*
|
|
* State block for each open TIFF
|
|
* file using ZIP compression/decompression.
|
|
*/
|
|
typedef struct {
|
|
TIFFPredictorState predict;
|
|
z_stream stream;
|
|
int zipquality; /* compression level */
|
|
int state; /* state flags */
|
|
#define ZSTATE_INIT_DECODE 0x01
|
|
#define ZSTATE_INIT_ENCODE 0x02
|
|
|
|
TIFFVGetMethod vgetparent; /* super-class method */
|
|
TIFFVSetMethod vsetparent; /* super-class method */
|
|
} ZIPState;
|
|
|
|
#define ZState(tif) ((ZIPState*) (tif)->tif_data)
|
|
#define DecoderState(tif) ZState(tif)
|
|
#define EncoderState(tif) ZState(tif)
|
|
|
|
static int ZIPEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s);
|
|
static int ZIPDecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s);
|
|
|
|
static int
|
|
ZIPFixupTags(TIFF* tif)
|
|
{
|
|
(void) tif;
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
ZIPSetupDecode(TIFF* tif)
|
|
{
|
|
static const char module[] = "ZIPSetupDecode";
|
|
ZIPState* sp = DecoderState(tif);
|
|
|
|
assert(sp != NULL);
|
|
|
|
/* if we were last encoding, terminate this mode */
|
|
if (sp->state & ZSTATE_INIT_ENCODE) {
|
|
deflateEnd(&sp->stream);
|
|
sp->state = 0;
|
|
}
|
|
|
|
if (inflateInit(&sp->stream) != Z_OK) {
|
|
TIFFErrorExt(tif->tif_clientdata, module, "%s", sp->stream.msg);
|
|
return (0);
|
|
} else {
|
|
sp->state |= ZSTATE_INIT_DECODE;
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Setup state for decoding a strip.
|
|
*/
|
|
static int
|
|
ZIPPreDecode(TIFF* tif, uint16 s)
|
|
{
|
|
static const char module[] = "ZIPPreDecode";
|
|
ZIPState* sp = DecoderState(tif);
|
|
|
|
(void) s;
|
|
assert(sp != NULL);
|
|
|
|
if( (sp->state & ZSTATE_INIT_DECODE) == 0 )
|
|
tif->tif_setupdecode( tif );
|
|
|
|
sp->stream.next_in = tif->tif_rawdata;
|
|
assert(sizeof(sp->stream.avail_in)==4); /* if this assert gets raised,
|
|
we need to simplify this code to reflect a ZLib that is likely updated
|
|
to deal with 8byte memory sizes, though this code will respond
|
|
apropriately even before we simplify it */
|
|
sp->stream.avail_in = (uInt) tif->tif_rawcc;
|
|
if ((tmsize_t)sp->stream.avail_in != tif->tif_rawcc)
|
|
{
|
|
TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
|
|
return (0);
|
|
}
|
|
return (inflateReset(&sp->stream) == Z_OK);
|
|
}
|
|
|
|
static int
|
|
ZIPDecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s)
|
|
{
|
|
static const char module[] = "ZIPDecode";
|
|
ZIPState* sp = DecoderState(tif);
|
|
|
|
(void) s;
|
|
assert(sp != NULL);
|
|
assert(sp->state == ZSTATE_INIT_DECODE);
|
|
|
|
sp->stream.next_in = tif->tif_rawcp;
|
|
sp->stream.avail_in = (uInt) tif->tif_rawcc;
|
|
|
|
sp->stream.next_out = op;
|
|
assert(sizeof(sp->stream.avail_out)==4); /* if this assert gets raised,
|
|
we need to simplify this code to reflect a ZLib that is likely updated
|
|
to deal with 8byte memory sizes, though this code will respond
|
|
apropriately even before we simplify it */
|
|
sp->stream.avail_out = (uInt) occ;
|
|
if ((tmsize_t)sp->stream.avail_out != occ)
|
|
{
|
|
TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
|
|
return (0);
|
|
}
|
|
do {
|
|
int state = inflate(&sp->stream, Z_PARTIAL_FLUSH);
|
|
if (state == Z_STREAM_END)
|
|
break;
|
|
if (state == Z_DATA_ERROR) {
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Decoding error at scanline %lu, %s",
|
|
(unsigned long) tif->tif_row, sp->stream.msg);
|
|
if (inflateSync(&sp->stream) != Z_OK)
|
|
return (0);
|
|
continue;
|
|
}
|
|
if (state != Z_OK) {
|
|
TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
|
|
sp->stream.msg);
|
|
return (0);
|
|
}
|
|
} while (sp->stream.avail_out > 0);
|
|
if (sp->stream.avail_out != 0) {
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Not enough data at scanline %lu (short " TIFF_UINT64_FORMAT " bytes)",
|
|
(unsigned long) tif->tif_row, (TIFF_UINT64_T) sp->stream.avail_out);
|
|
return (0);
|
|
}
|
|
|
|
tif->tif_rawcp = sp->stream.next_in;
|
|
tif->tif_rawcc = sp->stream.avail_in;
|
|
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
ZIPSetupEncode(TIFF* tif)
|
|
{
|
|
static const char module[] = "ZIPSetupEncode";
|
|
ZIPState* sp = EncoderState(tif);
|
|
|
|
assert(sp != NULL);
|
|
if (sp->state & ZSTATE_INIT_DECODE) {
|
|
inflateEnd(&sp->stream);
|
|
sp->state = 0;
|
|
}
|
|
|
|
if (deflateInit(&sp->stream, sp->zipquality) != Z_OK) {
|
|
TIFFErrorExt(tif->tif_clientdata, module, "%s", sp->stream.msg);
|
|
return (0);
|
|
} else {
|
|
sp->state |= ZSTATE_INIT_ENCODE;
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Reset encoding state at the start of a strip.
|
|
*/
|
|
static int
|
|
ZIPPreEncode(TIFF* tif, uint16 s)
|
|
{
|
|
static const char module[] = "ZIPPreEncode";
|
|
ZIPState *sp = EncoderState(tif);
|
|
|
|
(void) s;
|
|
assert(sp != NULL);
|
|
if( sp->state != ZSTATE_INIT_ENCODE )
|
|
tif->tif_setupencode( tif );
|
|
|
|
sp->stream.next_out = tif->tif_rawdata;
|
|
assert(sizeof(sp->stream.avail_out)==4); /* if this assert gets raised,
|
|
we need to simplify this code to reflect a ZLib that is likely updated
|
|
to deal with 8byte memory sizes, though this code will respond
|
|
apropriately even before we simplify it */
|
|
sp->stream.avail_out = tif->tif_rawdatasize;
|
|
if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize)
|
|
{
|
|
TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
|
|
return (0);
|
|
}
|
|
return (deflateReset(&sp->stream) == Z_OK);
|
|
}
|
|
|
|
/*
|
|
* Encode a chunk of pixels.
|
|
*/
|
|
static int
|
|
ZIPEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
|
|
{
|
|
static const char module[] = "ZIPEncode";
|
|
ZIPState *sp = EncoderState(tif);
|
|
|
|
assert(sp != NULL);
|
|
assert(sp->state == ZSTATE_INIT_ENCODE);
|
|
|
|
(void) s;
|
|
sp->stream.next_in = bp;
|
|
assert(sizeof(sp->stream.avail_in)==4); /* if this assert gets raised,
|
|
we need to simplify this code to reflect a ZLib that is likely updated
|
|
to deal with 8byte memory sizes, though this code will respond
|
|
apropriately even before we simplify it */
|
|
sp->stream.avail_in = (uInt) cc;
|
|
if ((tmsize_t)sp->stream.avail_in != cc)
|
|
{
|
|
TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
|
|
return (0);
|
|
}
|
|
do {
|
|
if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) {
|
|
TIFFErrorExt(tif->tif_clientdata, module, "Encoder error: %s",
|
|
sp->stream.msg);
|
|
return (0);
|
|
}
|
|
if (sp->stream.avail_out == 0) {
|
|
tif->tif_rawcc = tif->tif_rawdatasize;
|
|
TIFFFlushData1(tif);
|
|
sp->stream.next_out = tif->tif_rawdata;
|
|
sp->stream.avail_out = (uInt) tif->tif_rawdatasize; /* this is a safe typecast, as check is made already in ZIPPreEncode */
|
|
}
|
|
} while (sp->stream.avail_in > 0);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Finish off an encoded strip by flushing the last
|
|
* string and tacking on an End Of Information code.
|
|
*/
|
|
static int
|
|
ZIPPostEncode(TIFF* tif)
|
|
{
|
|
static const char module[] = "ZIPPostEncode";
|
|
ZIPState *sp = EncoderState(tif);
|
|
int state;
|
|
|
|
sp->stream.avail_in = 0;
|
|
do {
|
|
state = deflate(&sp->stream, Z_FINISH);
|
|
switch (state) {
|
|
case Z_STREAM_END:
|
|
case Z_OK:
|
|
if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize)
|
|
{
|
|
tif->tif_rawcc = tif->tif_rawdatasize - sp->stream.avail_out;
|
|
TIFFFlushData1(tif);
|
|
sp->stream.next_out = tif->tif_rawdata;
|
|
sp->stream.avail_out = (uInt) tif->tif_rawdatasize; /* this is a safe typecast, as check is made already in ZIPPreEncode */
|
|
}
|
|
break;
|
|
default:
|
|
TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
|
|
sp->stream.msg);
|
|
return (0);
|
|
}
|
|
} while (state != Z_STREAM_END);
|
|
return (1);
|
|
}
|
|
|
|
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 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",
|
|
sp->stream.msg);
|
|
return (0);
|
|
}
|
|
}
|
|
return (1);
|
|
default:
|
|
return (*sp->vsetparent)(tif, tag, ap);
|
|
}
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
static int
|
|
ZIPVGetField(TIFF* tif, uint32 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 const TIFFField zipFields[] = {
|
|
{ TIFFTAG_ZIPQUALITY, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, TRUE, FALSE, "", NULL },
|
|
};
|
|
|
|
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 (!_TIFFMergeFields(tif, zipFields, TIFFArrayCount(zipFields))) {
|
|
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 = (uint8*) _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_fixuptags = ZIPFixupTags;
|
|
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);
|
|
}
|
|
#endif /* ZIP_SUPORT */
|
|
|
|
/* vim: set ts=8 sts=8 sw=8 noet: */
|
|
/*
|
|
* Local Variables:
|
|
* mode: c
|
|
* c-basic-offset: 8
|
|
* fill-column: 78
|
|
* End:
|
|
*/
|