183 lines
3.7 KiB
C++
183 lines
3.7 KiB
C++
/*
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Minetest-c55
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Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef IRRLICHTWRAPPER_HEADER
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#define IRRLICHTWRAPPER_HEADER
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#include "threads.h"
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#include "common_irrlicht.h"
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#include "debug.h"
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#include "utility.h"
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#include <jmutex.h>
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#include <jmutexautolock.h>
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#include <string>
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/*
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A thread-safe texture pointer cache.
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This is used so that irrlicht doesn't get called from many
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threads, because texture pointers have to be handled in
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background threads.
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*/
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class TextureCache
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{
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public:
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TextureCache()
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{
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m_mutex.Init();
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assert(m_mutex.IsInitialized());
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}
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void set(std::string name, video::ITexture *texture)
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{
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JMutexAutoLock lock(m_mutex);
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m_textures[name] = texture;
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}
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video::ITexture* get(std::string name)
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{
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JMutexAutoLock lock(m_mutex);
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core::map<std::string, video::ITexture*>::Node *n;
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n = m_textures.find(name);
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if(n != NULL)
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return n->getValue();
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return NULL;
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}
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private:
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core::map<std::string, video::ITexture*> m_textures;
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JMutex m_mutex;
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};
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struct TextureMod
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{
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/*
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Returns a new texture which can be based on the original.
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Shall not modify or delete the original texture.
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*/
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virtual video::ITexture * make(video::ITexture *original,
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video::IVideoDriver* driver) = 0;
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};
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struct CrackTextureMod: public TextureMod
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{
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CrackTextureMod(u16 a_progression)
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{
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progression = a_progression;
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}
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virtual video::ITexture * make(video::ITexture *original,
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video::IVideoDriver* driver);
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u16 progression;
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};
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/*
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A class for specifying a requested texture
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*/
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struct TextureSpec
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{
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TextureSpec()
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{
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mod = NULL;
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}
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TextureSpec(const std::string &a_name, const std::string &a_path,
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TextureMod *a_mod)
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{
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name = a_name;
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path = a_path;
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mod = a_mod;;
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}
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~TextureSpec()
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{
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}
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bool operator==(const TextureSpec &other)
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{
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return name == other.name;
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}
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// An unique name for the texture. Usually the same as the path.
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// Note that names and paths reside the same namespace.
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std::string name;
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// This is the path of the base texture
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std::string path;
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// Modification to do to the base texture
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// NOTE: This is deleted by the one who processes the request
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TextureMod *mod;
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};
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/*
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A thread-safe wrapper for irrlicht, to be accessed from
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background worker threads.
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Queues tasks to be done in the main thread.
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*/
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class IrrlichtWrapper
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{
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public:
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/*
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These are called from the main thread
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*/
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IrrlichtWrapper(IrrlichtDevice *device);
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// Run queued tasks
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void Run();
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/*
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These are called from other threads
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*/
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// Not exactly thread-safe but this needs to be fast
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u32 getTime()
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{
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return m_device->getTimer()->getTime();
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}
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video::ITexture* getTexture(TextureSpec spec);
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video::ITexture* getTexture(const std::string &path);
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private:
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/*
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Non-thread-safe variants of stuff, for internal use
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*/
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video::ITexture* getTextureDirect(TextureSpec spec);
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/*
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Members
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*/
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threadid_t m_main_thread;
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JMutex m_device_mutex;
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IrrlichtDevice *m_device;
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TextureCache m_texturecache;
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RequestQueue<TextureSpec, video::ITexture*, u8, u8> m_get_texture_queue;
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};
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#endif
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