diff options
Diffstat (limited to 'src/libtiff/tif_zip.c')
| -rw-r--r-- | src/libtiff/tif_zip.c | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/src/libtiff/tif_zip.c b/src/libtiff/tif_zip.c new file mode 100644 index 0000000..41781f8 --- /dev/null +++ b/src/libtiff/tif_zip.c @@ -0,0 +1,378 @@ +/* $Id: tif_zip.c,v 1.1 2008/10/17 06:16:07 scuri 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 0x1 /* zlib setup successfully */ + + 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*, tidata_t, tsize_t, tsample_t); +static int ZIPDecode(TIFF*, tidata_t, tsize_t, tsample_t); + +static int +ZIPSetupDecode(TIFF* tif) +{ + ZIPState* sp = DecoderState(tif); + static const char module[] = "ZIPSetupDecode"; + + assert(sp != NULL); + if (inflateInit(&sp->stream) != Z_OK) { + TIFFErrorExt(tif->tif_clientdata, module, "%s: %s", tif->tif_name, sp->stream.msg); + return (0); + } else { + sp->state |= ZSTATE_INIT; + return (1); + } +} + +/* + * Setup state for decoding a strip. + */ +static int +ZIPPreDecode(TIFF* tif, tsample_t s) +{ + ZIPState* sp = DecoderState(tif); + + (void) s; + assert(sp != NULL); + sp->stream.next_in = tif->tif_rawdata; + sp->stream.avail_in = tif->tif_rawcc; + return (inflateReset(&sp->stream) == Z_OK); +} + +static int +ZIPDecode(TIFF* tif, tidata_t op, tsize_t occ, tsample_t s) +{ + ZIPState* sp = DecoderState(tif); + static const char module[] = "ZIPDecode"; + + (void) s; + assert(sp != NULL); + sp->stream.next_out = op; + sp->stream.avail_out = occ; + 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, + "%s: Decoding error at scanline %d, %s", + tif->tif_name, tif->tif_row, sp->stream.msg); + if (inflateSync(&sp->stream) != Z_OK) + return (0); + continue; + } + if (state != Z_OK) { + TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s", + tif->tif_name, sp->stream.msg); + return (0); + } + } while (sp->stream.avail_out > 0); + if (sp->stream.avail_out != 0) { + TIFFErrorExt(tif->tif_clientdata, module, + "%s: Not enough data at scanline %d (short %d bytes)", + tif->tif_name, tif->tif_row, sp->stream.avail_out); + return (0); + } + return (1); +} + +static int +ZIPSetupEncode(TIFF* tif) +{ + ZIPState* sp = EncoderState(tif); + static const char module[] = "ZIPSetupEncode"; + + assert(sp != NULL); + if (deflateInit(&sp->stream, sp->zipquality) != Z_OK) { + TIFFErrorExt(tif->tif_clientdata, module, "%s: %s", tif->tif_name, sp->stream.msg); + return (0); + } else { + sp->state |= ZSTATE_INIT; + return (1); + } +} + +/* + * Reset encoding state at the start of a strip. + */ +static int +ZIPPreEncode(TIFF* tif, tsample_t s) +{ + ZIPState *sp = EncoderState(tif); + + (void) s; + assert(sp != NULL); + sp->stream.next_out = tif->tif_rawdata; + sp->stream.avail_out = tif->tif_rawdatasize; + return (deflateReset(&sp->stream) == Z_OK); +} + +/* + * Encode a chunk of pixels. + */ +static int +ZIPEncode(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s) +{ + ZIPState *sp = EncoderState(tif); + static const char module[] = "ZIPEncode"; + + (void) s; + sp->stream.next_in = bp; + sp->stream.avail_in = cc; + do { + if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) { + TIFFErrorExt(tif->tif_clientdata, module, "%s: Encoder error: %s", + tif->tif_name, 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 = tif->tif_rawdatasize; + } + } 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) +{ + ZIPState *sp = EncoderState(tif); + static const char module[] = "ZIPPostEncode"; + int state; + + sp->stream.avail_in = 0; + do { + state = deflate(&sp->stream, Z_FINISH); + switch (state) { + case Z_STREAM_END: + case Z_OK: + if ((int)sp->stream.avail_out != (int)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 = tif->tif_rawdatasize; + } + break; + default: + TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s", + tif->tif_name, 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) { + /* 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); +} + +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) { + TIFFErrorExt(tif->tif_clientdata, 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 +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 const TIFFFieldInfo zipFieldInfo[] = { + { TIFFTAG_ZIPQUALITY, 0, 0, TIFF_ANY, FIELD_PSEUDO, + TRUE, FALSE, "" }, +}; + +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, TIFFArrayCount(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; + 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, "TIFFInitZIP", + "No space for ZIP state block"); + return (0); +} +#endif /* ZIP_SUPORT */ + +/* vim: set ts=8 sts=8 sw=8 noet: */ |