summaryrefslogtreecommitdiff
path: root/tiff/libtiff/tif_zip.c
diff options
context:
space:
mode:
Diffstat (limited to 'tiff/libtiff/tif_zip.c')
-rwxr-xr-xtiff/libtiff/tif_zip.c472
1 files changed, 472 insertions, 0 deletions
diff --git a/tiff/libtiff/tif_zip.c b/tiff/libtiff/tif_zip.c
new file mode 100755
index 0000000..22e9f35
--- /dev/null
+++ b/tiff/libtiff/tif_zip.c
@@ -0,0 +1,472 @@
+/* $Id: tif_zip.c,v 1.33 2014-12-25 18:29:11 erouault 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 suppressing 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
+
+#define SAFE_MSG(sp) ((sp)->stream.msg == NULL ? "" : (sp)->stream.msg)
+
+/*
+ * 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", SAFE_MSG(sp));
+ 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, SAFE_MSG(sp));
+ if (inflateSync(&sp->stream) != Z_OK)
+ return (0);
+ continue;
+ }
+ if (state != Z_OK) {
+ TIFFErrorExt(tif->tif_clientdata, module,
+ "ZLib error: %s", SAFE_MSG(sp));
+ 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", SAFE_MSG(sp));
+ 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",
+ SAFE_MSG(sp));
+ 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", SAFE_MSG(sp));
+ 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",
+ SAFE_MSG(sp));
+ 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:
+ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 19:13:00 +0000