+++ /dev/null
-/* $Id: tif_compress.c,v 1.25 2016-10-25 20:04:22 erouault 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 <precomp.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, uint8* pp, tmsize_t cc, uint16 s)
-{
- (void) pp; (void) cc; (void) s;
- return (TIFFNoEncode(tif, "scanline"));
-}
-
-int
-_TIFFNoStripEncode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 s)
-{
- (void) pp; (void) cc; (void) s;
- return (TIFFNoEncode(tif, "strip"));
-}
-
-int
-_TIFFNoTileEncode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 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 (0);
-}
-
-static int
-_TIFFNoFixupTags(TIFF* tif)
-{
- (void) tif;
- return (1);
-}
-
-int
-_TIFFNoRowDecode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 s)
-{
- (void) pp; (void) cc; (void) s;
- return (TIFFNoDecode(tif, "scanline"));
-}
-
-int
-_TIFFNoStripDecode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 s)
-{
- (void) pp; (void) cc; (void) s;
- return (TIFFNoDecode(tif, "strip"));
-}
-
-int
-_TIFFNoTileDecode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 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, uint16 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_fixuptags = _TIFFNoFixupTags;
- 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((tmsize_t)(sizeof (codec_t) + sizeof (TIFFCodec) + strlen(name)+1));
-
- if (cd != NULL) {
- cd->info = (TIFFCodec*) ((uint8*) cd + sizeof (codec_t));
- cd->info->name = (char*)
- ((uint8*) 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 = ®isteredCODECS; (cd = *pcd) != NULL; 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;
- TIFFCodec* 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 void*)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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