+++ /dev/null
-/* $Id: tif_zip.c,v 1.1 2005/06/17 13:54:52 vp153 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) {
- TIFFError(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) {
- TIFFError(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) {
- TIFFError(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) {
- TIFFError(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) {
- TIFFError(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) {
- TIFFError(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:
- TIFFError(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);
- 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
-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, "" },
-};
-#define N(a) (sizeof (a) / sizeof (a[0]))
-
-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;
- 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:
- TIFFError("TIFFInitZIP", "No space for ZIP state block");
- return (0);
-}
-#endif /* ZIP_SUPORT */
-
-/* vim: set ts=8 sts=8 sw=8 noet: */
projects / opencv / blobdiff