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author | Willem Jan Palenstijn | 2015-07-22 22:37:40 +0200 |
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committer | Willem Jan Palenstijn | 2015-07-22 22:43:42 +0200 |
commit | 6ec9c81b575f13b2c4b30aeac592ebf2557b5890 (patch) | |
tree | 503d50902bad2d800165593039d08d5ccf0c98ab /engines/sherlock/resources.h | |
parent | 5ec05f6b647c5ea41418be7ed19ad381f97cabd8 (diff) | |
parent | 4e5c8d35f7e133e2e72a846fdbd54900c91eeb73 (diff) | |
download | scummvm-rg350-6ec9c81b575f13b2c4b30aeac592ebf2557b5890.tar.gz scummvm-rg350-6ec9c81b575f13b2c4b30aeac592ebf2557b5890.tar.bz2 scummvm-rg350-6ec9c81b575f13b2c4b30aeac592ebf2557b5890.zip |
Merge branch 'master' into mm
Conflicts:
engines/access/access.cpp
engines/access/asurface.h
engines/access/bubble_box.cpp
engines/access/bubble_box.h
engines/access/martian/martian_game.cpp
engines/access/player.cpp
engines/access/player.h
engines/access/resources.cpp
engines/access/screen.cpp
engines/access/screen.h
engines/access/sound.cpp
engines/access/sound.h
Diffstat (limited to 'engines/sherlock/resources.h')
-rw-r--r-- | engines/sherlock/resources.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/engines/sherlock/resources.h b/engines/sherlock/resources.h new file mode 100644 index 0000000000..8e0216d69d --- /dev/null +++ b/engines/sherlock/resources.h @@ -0,0 +1,170 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#ifndef SHERLOCK_RESOURCES_H +#define SHERLOCK_RESOURCES_H + +#include "common/array.h" +#include "common/file.h" +#include "common/hashmap.h" +#include "common/hash-str.h" +#include "common/rect.h" +#include "common/str.h" +#include "common/stream.h" +#include "graphics/surface.h" + +namespace Sherlock { + +typedef Common::Array<byte> CacheEntry; +typedef Common::HashMap<Common::String, CacheEntry, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> CacheHash; + +struct LibraryEntry { + uint32 _offset, _size; + int _index; + + LibraryEntry() : _index(0), _offset(0), _size(0) {} + LibraryEntry(int index, uint32 offset, uint32 size) : + _index(index), _offset(offset), _size(size) {} +}; +typedef Common::HashMap<Common::String, LibraryEntry, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> LibraryIndex; +typedef Common::HashMap<Common::String, LibraryIndex, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> LibraryIndexes; + +class SherlockEngine; + +class Cache { +private: + SherlockEngine *_vm; + CacheHash _resources; +public: + Cache(SherlockEngine *_vm); + + /** + * Returns true if a given file is currently being cached + */ + bool isCached(const Common::String &filename) const; + + /** + * Loads a file into the cache if it's not already present, and returns it. + * If the file is LZW compressed, automatically decompresses it and loads + * the uncompressed version into memory + */ + void load(const Common::String &name); + + /** + * Load a cache entry based on a passed stream + */ + void load(const Common::String &name, Common::SeekableReadStream &stream); + + /** + * Get a file from the cache + */ + Common::SeekableReadStream *get(const Common::String &filename) const; +}; + +class Resources { +private: + SherlockEngine *_vm; + Cache _cache; + LibraryIndexes _indexes; + int _resourceIndex; + + /** + * Reads in the index from a library file, and caches it's index for later use + */ + void loadLibraryIndex(const Common::String &libFilename, Common::SeekableReadStream *stream, bool isNewStyle); +public: + Resources(SherlockEngine *vm); + + /** + * Adds the specified file to the cache. If it's a library file, takes care of + * loading it's index for future use + */ + void addToCache(const Common::String &filename); + + /** + * Adds a resource from a library file to the cache + */ + void addToCache(const Common::String &filename, const Common::String &libFilename); + + /** + * Adds a given stream to the cache under the given name + */ + void addToCache(const Common::String &filename, Common::SeekableReadStream &stream); + + bool isInCache(const Common::String &filename) const { return _cache.isCached(filename); } + + /** + * Checks the passed stream, and if is compressed, deletes it and replaces it with it's uncompressed data + */ + void decompressIfNecessary(Common::SeekableReadStream *&stream); + + /** + * Returns a stream for a given file + */ + Common::SeekableReadStream *load(const Common::String &filename); + + /** + * Loads a specific resource from a given library file + */ + Common::SeekableReadStream *load(const Common::String &filename, const Common::String &libraryFile); + + /** + * Returns true if the given file exists on disk or in the cache + */ + bool exists(const Common::String &filename) const; + + /** + * Returns the index of the last loaded resource in it's given library file. + * This will be used primarily when loading talk files, so the engine can + * update the given conversation number in the journal + */ + int resourceIndex() const; + + /** + * Decompresses LZW compressed data + */ + Common::SeekableReadStream *decompress(Common::SeekableReadStream &source); + + /** + * Decompresses LZW compressed data + */ + Common::SeekableReadStream *decompress(Common::SeekableReadStream &source, uint32 outSize); + + /** + * Decompresses LZW compressed data + */ + void decompress(Common::SeekableReadStream &source, byte *buffer, uint32 outSize); + + /** + * Decompresses LZW compressed data + */ + static Common::SeekableReadStream *decompressLZ(Common::SeekableReadStream &source, uint32 outSize); + + /** + * Decompresses LZW compressed data + */ + static void decompressLZ(Common::SeekableReadStream &source, byte *outBuffer, int32 outSize, int32 inSize); +}; + +} // End of namespace Sherlock + +#endif |