457 lines
13 KiB
C
457 lines
13 KiB
C
/* $Id: tif_zip.c,v 1.23 2007-06-28 12:43:08 joris Exp $ */
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/*
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* Copyright (c) 1995-1997 Sam Leffler
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* Copyright (c) 1995-1997 Silicon Graphics, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that (i) the above copyright notices and this permission notice appear in
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* all copies of the software and related documentation, and (ii) the names of
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* Sam Leffler and Silicon Graphics may not be used in any advertising or
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* publicity relating to the software without the specific, prior written
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* permission of Sam Leffler and Silicon Graphics.
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*
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include "tiffiop.h"
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#ifdef ZIP_SUPPORT
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/*
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* TIFF Library.
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*
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* ZIP (aka Deflate) Compression Support
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*
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* This file is simply an interface to the zlib library written by
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* Jean-loup Gailly and Mark Adler. You must use version 1.0 or later
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* of the library: this code assumes the 1.0 API and also depends on
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* the ability to write the zlib header multiple times (one per strip)
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* which was not possible with versions prior to 0.95. Note also that
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* older versions of this codec avoided this bug by supressing the header
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* entirely. This means that files written with the old library cannot
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* be read; they should be converted to a different compression scheme
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* and then reconverted.
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*
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* The data format used by the zlib library is described in the files
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* zlib-3.1.doc, deflate-1.1.doc and gzip-4.1.doc, available in the
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* directory ftp://ftp.uu.net/pub/archiving/zip/doc. The library was
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* last found at ftp://ftp.uu.net/pub/archiving/zip/zlib/zlib-0.99.tar.gz.
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*/
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#include "tif_predict.h"
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#include "zlib.h"
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#include <stdio.h>
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/*
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* Sigh, ZLIB_VERSION is defined as a string so there's no
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* way to do a proper check here. Instead we guess based
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* on the presence of #defines that were added between the
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* 0.95 and 1.0 distributions.
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*/
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#if !defined(Z_NO_COMPRESSION) || !defined(Z_DEFLATED)
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#error "Antiquated ZLIB software; you must use version 1.0 or later"
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#endif
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/*
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* State block for each open TIFF
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* file using ZIP compression/decompression.
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*/
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typedef struct {
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TIFFPredictorState predict;
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z_stream stream;
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int zipquality; /* compression level */
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int state; /* state flags */
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#define ZSTATE_INIT_DECODE 0x01
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#define ZSTATE_INIT_ENCODE 0x02
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TIFFVGetMethod vgetparent; /* super-class method */
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TIFFVSetMethod vsetparent; /* super-class method */
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} ZIPState;
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#define ZState(tif) ((ZIPState*) (tif)->tif_data)
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#define DecoderState(tif) ZState(tif)
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#define EncoderState(tif) ZState(tif)
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static int ZIPEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s);
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static int ZIPDecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s);
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static int
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ZIPFixupTags(TIFF* tif)
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{
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(void) tif;
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return (1);
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}
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static int
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ZIPSetupDecode(TIFF* tif)
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{
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static const char module[] = "ZIPSetupDecode";
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ZIPState* sp = DecoderState(tif);
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assert(sp != NULL);
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/* if we were last encoding, terminate this mode */
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if (sp->state & ZSTATE_INIT_ENCODE) {
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deflateEnd(&sp->stream);
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sp->state = 0;
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}
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if (inflateInit(&sp->stream) != Z_OK) {
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TIFFErrorExt(tif->tif_clientdata, module, "%s", sp->stream.msg);
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return (0);
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} else {
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sp->state |= ZSTATE_INIT_DECODE;
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return (1);
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}
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}
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/*
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* Setup state for decoding a strip.
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*/
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static int
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ZIPPreDecode(TIFF* tif, uint16 s)
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{
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static const char module[] = "ZIPPreDecode";
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ZIPState* sp = DecoderState(tif);
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(void) s;
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assert(sp != NULL);
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if( (sp->state & ZSTATE_INIT_DECODE) == 0 )
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ZIPSetupDecode(tif);
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sp->stream.next_in = tif->tif_rawdata;
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assert(sizeof(sp->stream.avail_in)==4); /* if this assert gets raised,
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we need to simplify this code to reflect a ZLib that is likely updated
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to deal with 8byte memory sizes, though this code will respond
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apropriately even before we simplify it */
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sp->stream.avail_in = (uInt) tif->tif_rawcc;
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if ((tmsize_t)sp->stream.avail_in != tif->tif_rawcc)
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{
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TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
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return (0);
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}
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return (inflateReset(&sp->stream) == Z_OK);
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}
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static int
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ZIPDecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s)
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{
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static const char module[] = "ZIPDecode";
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ZIPState* sp = DecoderState(tif);
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(void) s;
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assert(sp != NULL);
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assert(sp->state == ZSTATE_INIT_DECODE);
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sp->stream.next_out = op;
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assert(sizeof(sp->stream.avail_out)==4); /* if this assert gets raised,
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we need to simplify this code to reflect a ZLib that is likely updated
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to deal with 8byte memory sizes, though this code will respond
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apropriately even before we simplify it */
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sp->stream.avail_out = (uInt) occ;
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if ((tmsize_t)sp->stream.avail_out != occ)
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{
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TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
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return (0);
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}
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do {
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int state = inflate(&sp->stream, Z_PARTIAL_FLUSH);
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if (state == Z_STREAM_END)
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break;
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if (state == Z_DATA_ERROR) {
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TIFFErrorExt(tif->tif_clientdata, module,
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"Decoding error at scanline %lud, %s",
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(unsigned long) tif->tif_row, sp->stream.msg);
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if (inflateSync(&sp->stream) != Z_OK)
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return (0);
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continue;
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}
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if (state != Z_OK) {
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TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
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sp->stream.msg);
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return (0);
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}
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} while (sp->stream.avail_out > 0);
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if (sp->stream.avail_out != 0) {
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TIFFErrorExt(tif->tif_clientdata, module,
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"Not enough data at scanline %lud (short %llud bytes)",
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(unsigned long) tif->tif_row, (unsigned long long) sp->stream.avail_out);
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return (0);
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}
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return (1);
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}
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static int
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ZIPSetupEncode(TIFF* tif)
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{
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static const char module[] = "ZIPSetupEncode";
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ZIPState* sp = EncoderState(tif);
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assert(sp != NULL);
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if (sp->state & ZSTATE_INIT_DECODE) {
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inflateEnd(&sp->stream);
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sp->state = 0;
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}
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if (deflateInit(&sp->stream, sp->zipquality) != Z_OK) {
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TIFFErrorExt(tif->tif_clientdata, module, "%s", sp->stream.msg);
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return (0);
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} else {
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sp->state |= ZSTATE_INIT_ENCODE;
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return (1);
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}
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}
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/*
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* Reset encoding state at the start of a strip.
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*/
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static int
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ZIPPreEncode(TIFF* tif, uint16 s)
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{
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static const char module[] = "ZIPPreEncode";
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ZIPState *sp = EncoderState(tif);
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(void) s;
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assert(sp != NULL);
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if( sp->state != ZSTATE_INIT_ENCODE )
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ZIPSetupEncode(tif);
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sp->stream.next_out = tif->tif_rawdata;
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assert(sizeof(sp->stream.avail_out)==4); /* if this assert gets raised,
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we need to simplify this code to reflect a ZLib that is likely updated
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to deal with 8byte memory sizes, though this code will respond
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apropriately even before we simplify it */
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sp->stream.avail_out = tif->tif_rawdatasize;
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if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize)
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{
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TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
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return (0);
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}
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return (deflateReset(&sp->stream) == Z_OK);
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}
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/*
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* Encode a chunk of pixels.
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*/
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static int
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ZIPEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
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{
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static const char module[] = "ZIPEncode";
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ZIPState *sp = EncoderState(tif);
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assert(sp != NULL);
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assert(sp->state == ZSTATE_INIT_ENCODE);
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(void) s;
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sp->stream.next_in = bp;
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assert(sizeof(sp->stream.avail_in)==4); /* if this assert gets raised,
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we need to simplify this code to reflect a ZLib that is likely updated
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to deal with 8byte memory sizes, though this code will respond
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apropriately even before we simplify it */
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sp->stream.avail_in = (uInt) cc;
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if ((tmsize_t)sp->stream.avail_in != cc)
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{
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TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
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return (0);
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}
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do {
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if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) {
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TIFFErrorExt(tif->tif_clientdata, module, "Encoder error: %s",
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sp->stream.msg);
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return (0);
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}
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if (sp->stream.avail_out == 0) {
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tif->tif_rawcc = tif->tif_rawdatasize;
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TIFFFlushData1(tif);
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sp->stream.next_out = tif->tif_rawdata;
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sp->stream.avail_out = (uInt) tif->tif_rawdatasize; /* this is a safe typecast, as check is made already in ZIPPreEncode */
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}
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} while (sp->stream.avail_in > 0);
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return (1);
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}
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/*
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* Finish off an encoded strip by flushing the last
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* string and tacking on an End Of Information code.
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*/
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static int
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ZIPPostEncode(TIFF* tif)
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{
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static const char module[] = "ZIPPostEncode";
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ZIPState *sp = EncoderState(tif);
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int state;
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sp->stream.avail_in = 0;
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do {
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state = deflate(&sp->stream, Z_FINISH);
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switch (state) {
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case Z_STREAM_END:
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case Z_OK:
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if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize)
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{
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tif->tif_rawcc = tif->tif_rawdatasize - sp->stream.avail_out;
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TIFFFlushData1(tif);
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sp->stream.next_out = tif->tif_rawdata;
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sp->stream.avail_out = (uInt) tif->tif_rawdatasize; /* this is a safe typecast, as check is made already in ZIPPreEncode */
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}
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break;
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default:
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TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
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sp->stream.msg);
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return (0);
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}
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} while (state != Z_STREAM_END);
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return (1);
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}
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static void
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ZIPCleanup(TIFF* tif)
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{
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ZIPState* sp = ZState(tif);
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assert(sp != 0);
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(void)TIFFPredictorCleanup(tif);
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tif->tif_tagmethods.vgetfield = sp->vgetparent;
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tif->tif_tagmethods.vsetfield = sp->vsetparent;
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if (sp->state & ZSTATE_INIT_ENCODE) {
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deflateEnd(&sp->stream);
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sp->state = 0;
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} else if( sp->state & ZSTATE_INIT_DECODE) {
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inflateEnd(&sp->stream);
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sp->state = 0;
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}
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_TIFFfree(sp);
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tif->tif_data = NULL;
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_TIFFSetDefaultCompressionState(tif);
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}
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static int
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ZIPVSetField(TIFF* tif, uint32 tag, va_list ap)
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{
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static const char module[] = "ZIPVSetField";
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ZIPState* sp = ZState(tif);
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switch (tag) {
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case TIFFTAG_ZIPQUALITY:
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sp->zipquality = (int) va_arg(ap, int);
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if ( sp->state&ZSTATE_INIT_ENCODE ) {
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if (deflateParams(&sp->stream,
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sp->zipquality, Z_DEFAULT_STRATEGY) != Z_OK) {
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TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
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sp->stream.msg);
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return (0);
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}
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}
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return (1);
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default:
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return (*sp->vsetparent)(tif, tag, ap);
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}
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/*NOTREACHED*/
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}
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static int
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ZIPVGetField(TIFF* tif, uint32 tag, va_list ap)
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{
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ZIPState* sp = ZState(tif);
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switch (tag) {
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case TIFFTAG_ZIPQUALITY:
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*va_arg(ap, int*) = sp->zipquality;
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break;
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default:
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return (*sp->vgetparent)(tif, tag, ap);
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}
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return (1);
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}
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static const TIFFFieldInfo zipFieldInfo[] = {
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{ TIFFTAG_ZIPQUALITY, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, TRUE, FALSE, "", NULL },
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};
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int
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TIFFInitZIP(TIFF* tif, int scheme)
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{
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const char module[] = "TIFFInitZIP";
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ZIPState* sp;
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assert( (scheme == COMPRESSION_DEFLATE)
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|| (scheme == COMPRESSION_ADOBE_DEFLATE));
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/*
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* Merge codec-specific tag information.
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*/
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if (!_TIFFMergeFieldInfo(tif, zipFieldInfo,
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TIFFArrayCount(zipFieldInfo))) {
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TIFFErrorExt(tif->tif_clientdata, module,
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"Merging Deflate codec-specific tags failed");
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return 0;
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}
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/*
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* Allocate state block so tag methods have storage to record values.
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*/
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tif->tif_data = (uint8*) _TIFFmalloc(sizeof (ZIPState));
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if (tif->tif_data == NULL)
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goto bad;
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sp = ZState(tif);
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sp->stream.zalloc = NULL;
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sp->stream.zfree = NULL;
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sp->stream.opaque = NULL;
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sp->stream.data_type = Z_BINARY;
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/*
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* Override parent get/set field methods.
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*/
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sp->vgetparent = tif->tif_tagmethods.vgetfield;
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tif->tif_tagmethods.vgetfield = ZIPVGetField; /* hook for codec tags */
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sp->vsetparent = tif->tif_tagmethods.vsetfield;
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tif->tif_tagmethods.vsetfield = ZIPVSetField; /* hook for codec tags */
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/* Default values for codec-specific fields */
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sp->zipquality = Z_DEFAULT_COMPRESSION; /* default comp. level */
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sp->state = 0;
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/*
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* Install codec methods.
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*/
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tif->tif_fixuptags = ZIPFixupTags;
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tif->tif_setupdecode = ZIPSetupDecode;
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tif->tif_predecode = ZIPPreDecode;
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tif->tif_decoderow = ZIPDecode;
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tif->tif_decodestrip = ZIPDecode;
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tif->tif_decodetile = ZIPDecode;
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tif->tif_setupencode = ZIPSetupEncode;
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tif->tif_preencode = ZIPPreEncode;
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tif->tif_postencode = ZIPPostEncode;
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tif->tif_encoderow = ZIPEncode;
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tif->tif_encodestrip = ZIPEncode;
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tif->tif_encodetile = ZIPEncode;
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tif->tif_cleanup = ZIPCleanup;
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/*
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* Setup predictor setup.
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*/
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(void) TIFFPredictorInit(tif);
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return (1);
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bad:
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TIFFErrorExt(tif->tif_clientdata, module,
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"No space for ZIP state block");
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return (0);
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}
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#endif /* ZIP_SUPORT */
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/* vim: set ts=8 sts=8 sw=8 noet: */
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