--- /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