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-rw-r--r--tiff/libtiff/tif_compress.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/tiff/libtiff/tif_compress.c b/tiff/libtiff/tif_compress.c
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+++ b/tiff/libtiff/tif_compress.c
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+/* $Id: tif_compress.c,v 1.13.2.1 2010-06-08 18:50:41 bfriesen Exp $ */
+
+/*
+ * Copyright (c) 1988-1997 Sam Leffler
+ * Copyright (c) 1991-1997 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.
+ */
+
+/*
+ * TIFF Library
+ *
+ * Compression Scheme Configuration Support.
+ */
+#include "tiffiop.h"
+
+static int
+TIFFNoEncode(TIFF* tif, const char* method)
+{
+ const TIFFCodec* c = TIFFFindCODEC(tif->tif_dir.td_compression);
+
+ if (c) {
+ TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
+ "%s %s encoding is not implemented",
+ c->name, method);
+ } else {
+ TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
+ "Compression scheme %u %s encoding is not implemented",
+ tif->tif_dir.td_compression, method);
+ }
+ return (-1);
+}
+
+int
+_TIFFNoRowEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
+{
+ (void) pp; (void) cc; (void) s;
+ return (TIFFNoEncode(tif, "scanline"));
+}
+
+int
+_TIFFNoStripEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
+{
+ (void) pp; (void) cc; (void) s;
+ return (TIFFNoEncode(tif, "strip"));
+}
+
+int
+_TIFFNoTileEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
+{
+ (void) pp; (void) cc; (void) s;
+ return (TIFFNoEncode(tif, "tile"));
+}
+
+static int
+TIFFNoDecode(TIFF* tif, const char* method)
+{
+ const TIFFCodec* c = TIFFFindCODEC(tif->tif_dir.td_compression);
+
+ if (c)
+ TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
+ "%s %s decoding is not implemented",
+ c->name, method);
+ else
+ TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
+ "Compression scheme %u %s decoding is not implemented",
+ tif->tif_dir.td_compression, method);
+ return (-1);
+}
+
+int
+_TIFFNoRowDecode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
+{
+ (void) pp; (void) cc; (void) s;
+ return (TIFFNoDecode(tif, "scanline"));
+}
+
+int
+_TIFFNoStripDecode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
+{
+ (void) pp; (void) cc; (void) s;
+ return (TIFFNoDecode(tif, "strip"));
+}
+
+int
+_TIFFNoTileDecode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
+{
+ (void) pp; (void) cc; (void) s;
+ return (TIFFNoDecode(tif, "tile"));
+}
+
+int
+_TIFFNoSeek(TIFF* tif, uint32 off)
+{
+ (void) off;
+ TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
+ "Compression algorithm does not support random access");
+ return (0);
+}
+
+int
+_TIFFNoPreCode(TIFF* tif, tsample_t s)
+{
+ (void) tif; (void) s;
+ return (1);
+}
+
+static int _TIFFtrue(TIFF* tif) { (void) tif; return (1); }
+static void _TIFFvoid(TIFF* tif) { (void) tif; }
+
+void
+_TIFFSetDefaultCompressionState(TIFF* tif)
+{
+ tif->tif_decodestatus = TRUE;
+ tif->tif_setupdecode = _TIFFtrue;
+ tif->tif_predecode = _TIFFNoPreCode;
+ tif->tif_decoderow = _TIFFNoRowDecode;
+ tif->tif_decodestrip = _TIFFNoStripDecode;
+ tif->tif_decodetile = _TIFFNoTileDecode;
+ tif->tif_encodestatus = TRUE;
+ tif->tif_setupencode = _TIFFtrue;
+ tif->tif_preencode = _TIFFNoPreCode;
+ tif->tif_postencode = _TIFFtrue;
+ tif->tif_encoderow = _TIFFNoRowEncode;
+ tif->tif_encodestrip = _TIFFNoStripEncode;
+ tif->tif_encodetile = _TIFFNoTileEncode;
+ tif->tif_close = _TIFFvoid;
+ tif->tif_seek = _TIFFNoSeek;
+ tif->tif_cleanup = _TIFFvoid;
+ tif->tif_defstripsize = _TIFFDefaultStripSize;
+ tif->tif_deftilesize = _TIFFDefaultTileSize;
+ tif->tif_flags &= ~(TIFF_NOBITREV|TIFF_NOREADRAW);
+}
+
+int
+TIFFSetCompressionScheme(TIFF* tif, int scheme)
+{
+ const TIFFCodec *c = TIFFFindCODEC((uint16) scheme);
+
+ _TIFFSetDefaultCompressionState(tif);
+ /*
+ * Don't treat an unknown compression scheme as an error.
+ * This permits applications to open files with data that
+ * the library does not have builtin support for, but which
+ * may still be meaningful.
+ */
+ return (c ? (*c->init)(tif, scheme) : 1);
+}
+
+/*
+ * Other compression schemes may be registered. Registered
+ * schemes can also override the builtin versions provided
+ * by this library.
+ */
+typedef struct _codec {
+ struct _codec* next;
+ TIFFCodec* info;
+} codec_t;
+static codec_t* registeredCODECS = NULL;
+
+const TIFFCodec*
+TIFFFindCODEC(uint16 scheme)
+{
+ const TIFFCodec* c;
+ codec_t* cd;
+
+ for (cd = registeredCODECS; cd; cd = cd->next)
+ if (cd->info->scheme == scheme)
+ return ((const TIFFCodec*) cd->info);
+ for (c = _TIFFBuiltinCODECS; c->name; c++)
+ if (c->scheme == scheme)
+ return (c);
+ return ((const TIFFCodec*) 0);
+}
+
+TIFFCodec*
+TIFFRegisterCODEC(uint16 scheme, const char* name, TIFFInitMethod init)
+{
+ codec_t* cd = (codec_t*)
+ _TIFFmalloc(sizeof (codec_t) + sizeof (TIFFCodec) + strlen(name)+1);
+
+ if (cd != NULL) {
+ cd->info = (TIFFCodec*) ((tidata_t) cd + sizeof (codec_t));
+ cd->info->name = (char*)
+ ((tidata_t) cd->info + sizeof (TIFFCodec));
+ strcpy(cd->info->name, name);
+ cd->info->scheme = scheme;
+ cd->info->init = init;
+ cd->next = registeredCODECS;
+ registeredCODECS = cd;
+ } else {
+ TIFFErrorExt(0, "TIFFRegisterCODEC",
+ "No space to register compression scheme %s", name);
+ return NULL;
+ }
+ return (cd->info);
+}
+
+void
+TIFFUnRegisterCODEC(TIFFCodec* c)
+{
+ codec_t* cd;
+ codec_t** pcd;
+
+ for (pcd = &registeredCODECS; (cd = *pcd); pcd = &cd->next)
+ if (cd->info == c) {
+ *pcd = cd->next;
+ _TIFFfree(cd);
+ return;
+ }
+ TIFFErrorExt(0, "TIFFUnRegisterCODEC",
+ "Cannot remove compression scheme %s; not registered", c->name);
+}
+
+/************************************************************************/
+/* TIFFGetConfisuredCODECs() */
+/************************************************************************/
+
+/**
+ * Get list of configured codecs, both built-in and registered by user.
+ * Caller is responsible to free this structure.
+ *
+ * @return returns array of TIFFCodec records (the last record should be NULL)
+ * or NULL if function failed.
+ */
+
+TIFFCodec*
+TIFFGetConfiguredCODECs()
+{
+ int i = 1;
+ codec_t *cd;
+ const TIFFCodec *c;
+ TIFFCodec *codecs = NULL, *new_codecs;
+
+ for (cd = registeredCODECS; cd; cd = cd->next) {
+ new_codecs = (TIFFCodec *)
+ _TIFFrealloc(codecs, i * sizeof(TIFFCodec));
+ if (!new_codecs) {
+ _TIFFfree (codecs);
+ return NULL;
+ }
+ codecs = new_codecs;
+ _TIFFmemcpy(codecs + i - 1, cd, sizeof(TIFFCodec));
+ i++;
+ }
+ for (c = _TIFFBuiltinCODECS; c->name; c++) {
+ if (TIFFIsCODECConfigured(c->scheme)) {
+ new_codecs = (TIFFCodec *)
+ _TIFFrealloc(codecs, i * sizeof(TIFFCodec));
+ if (!new_codecs) {
+ _TIFFfree (codecs);
+ return NULL;
+ }
+ codecs = new_codecs;
+ _TIFFmemcpy(codecs + i - 1, (const tdata_t)c, sizeof(TIFFCodec));
+ i++;
+ }
+ }
+
+ new_codecs = (TIFFCodec *) _TIFFrealloc(codecs, i * sizeof(TIFFCodec));
+ if (!new_codecs) {
+ _TIFFfree (codecs);
+ return NULL;
+ }
+ codecs = new_codecs;
+ _TIFFmemset(codecs + i - 1, 0, sizeof(TIFFCodec));
+
+ return codecs;
+}
+
+/* vim: set ts=8 sts=8 sw=8 noet: */
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 8
+ * fill-column: 78
+ * End:
+ */
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