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engines/illusions/resourcesystem.h

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef ILLUSIONS_RESOURCESYSTEM_H
+#define ILLUSIONS_RESOURCESYSTEM_H
+
+#include "common/array.h"
+#include "common/file.h"
+#include "common/hashmap.h"
+#include "common/memstream.h"
+#include "common/str.h"
+#include "common/substream.h"
+#include "common/system.h"
+
+namespace Illusions {
+
+#define ResourceTypeId(x) ((x) & 0xFFFF0000)
+
+class BaseResourceLoader;
+class BaseResourceReader;
+class IllusionsEngine;
+struct Resource;
+
+class ResourceInstance {
+public:
+	virtual void load(Resource *resource);
+	virtual void unload();
+	virtual void pause();
+	virtual void unpause();
+	virtual ~ResourceInstance();
+};
+
+struct Resource {
+	bool _loaded;
+	uint32 _resId;
+	uint32 _sceneId;
+	uint32 _threadId;
+	byte *_data;
+	uint32 _dataSize;
+	int _gameId;
+	Common::String _filename;
+	ResourceInstance *_instance;
+	Resource() : _loaded(false), _resId(0), _sceneId(0), _threadId(0), _data(0), _dataSize(0), _instance(0) {
+	}
+	~Resource() {
+		if (_instance)
+			_instance->unload();
+		delete _instance;
+		unloadData();
+	}
+	void loadData(BaseResourceReader *resReader);
+	void unloadData();
+};
+
+enum {
+	kRlfLoadFile,
+	kRlfFreeDataAfterLoad
+};
+
+class BaseResourceLoader {
+public:
+	virtual ~BaseResourceLoader() {}
+	virtual void load(Resource *resource) = 0;
+	virtual bool isFlag(int flag) = 0;
+};
+
+class ResourceSystem {
+public:
+	ResourceSystem(IllusionsEngine *vm);
+	~ResourceSystem();
+
+	void addResourceLoader(uint32 resTypeId, BaseResourceLoader *resourceLoader);
+
+	void loadResource(uint32 resId, uint32 sceneId, uint32 threadId);
+	void unloadResourceById(uint32 resId);
+	void unloadResourcesBySceneId(uint32 sceneId);
+	void unloadSceneResources(uint32 sceneId1, uint32 sceneId2);
+	void unloadAllResources();
+	Resource *getResource(uint32 resId);
+
+protected:
+	typedef Common::HashMap<uint32, BaseResourceLoader*> ResourceLoadersMap;
+	typedef ResourceLoadersMap::iterator ResourceLoadersMapIterator;
+	IllusionsEngine *_vm;
+	ResourceLoadersMap _resourceLoaders;
+	BaseResourceLoader *getResourceLoader(uint32 resId);
+
+	typedef Common::Array<Resource*> ResourcesArray;
+	typedef ResourcesArray::iterator ResourcesArrayIterator;
+	ResourcesArray _resources;
+
+	struct ResourceEqualById : public Common::UnaryFunction<const Resource*, bool> {
+		uint32 _resId;
+		ResourceEqualById(uint32 resId) : _resId(resId) {}
+		bool operator()(const Resource *resource) const {
+			return resource->_resId == _resId;
+		}
+	};
+
+	struct ResourceEqualByValue : public Common::UnaryFunction<const Resource*, bool> {
+		const Resource *_resource;
+		ResourceEqualByValue(const Resource *resource) : _resource(resource) {}
+		bool operator()(const Resource *resource) const {
+			return resource == _resource;
+		}
+	};
+
+	struct ResourceEqualBySceneId : public Common::UnaryFunction<const Resource*, bool> {
+		uint32 _sceneId;
+		ResourceEqualBySceneId(uint32 sceneId) : _sceneId(sceneId) {}
+		bool operator()(const Resource *resource) const {
+			return resource->_sceneId == _sceneId;
+		}
+	};
+
+	struct ResourceNotEqualByScenes : public Common::UnaryFunction<const Resource*, bool> {
+		uint32 _sceneId1, _sceneId2;
+		ResourceNotEqualByScenes(uint32 sceneId1, uint32 sceneId2) : _sceneId1(sceneId1), _sceneId2(sceneId2) {}
+		bool operator()(const Resource *resource) const {
+			return resource->_sceneId != _sceneId1 && resource->_sceneId != _sceneId2;
+		}
+	};
+
+	void unloadResource(Resource *resource);
+
+};
+
+} // End of namespace Illusions
+
+#endif // ILLUSIONS_RESOURCESYSTEM_H