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/*
Minetest-c55
Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
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 IRRLICHTWRAPPER_HEADER
#define IRRLICHTWRAPPER_HEADER
#include "threads.h"
#include "common_irrlicht.h"
#include "debug.h"
#include "utility.h"
#include "texture.h"
#include "iirrlichtwrapper.h"
#include <jmutex.h>
#include <jmutexautolock.h>
#include <string>
/*
A thread-safe texture pointer cache.
This is used so that irrlicht doesn't get called from many
threads, because texture pointers have to be handled in
background threads.
*/
#if 0
class TextureCache
{
public:
TextureCache()
{
m_mutex.Init();
assert(m_mutex.IsInitialized());
}
void set(std::string name, video::ITexture *texture)
{
if(texture == NULL)
return;
JMutexAutoLock lock(m_mutex);
m_textures[name] = texture;
}
video::ITexture* get(const std::string &name)
{
JMutexAutoLock lock(m_mutex);
core::map<std::string, video::ITexture*>::Node *n;
n = m_textures.find(name);
if(n != NULL)
return n->getValue();
return NULL;
}
private:
core::map<std::string, video::ITexture*> m_textures;
JMutex m_mutex;
};
#endif
/*
A thread-safe texture pointer cache
*/
class TextureCache
{
public:
TextureCache()
{
m_mutex.Init();
assert(m_mutex.IsInitialized());
}
void set(const TextureSpec &spec, video::ITexture *texture)
{
if(texture == NULL)
return;
JMutexAutoLock lock(m_mutex);
m_textures[spec] = texture;
}
video::ITexture* get(const TextureSpec &spec)
{
JMutexAutoLock lock(m_mutex);
core::map<TextureSpec, video::ITexture*>::Node *n;
n = m_textures.find(spec);
if(n != NULL)
return n->getValue();
return NULL;
}
private:
core::map<TextureSpec, video::ITexture*> m_textures;
JMutex m_mutex;
};
/*
A thread-safe wrapper for irrlicht, to be accessed from
background worker threads.
Queues tasks to be done in the main thread.
Also caches texture specification strings to ids and textures.
*/
class IrrlichtWrapper : public IIrrlichtWrapper
{
public:
/*
These are called from the main thread
*/
IrrlichtWrapper(IrrlichtDevice *device);
// Run queued tasks
void Run();
/*
These are called from other threads
*/
// Not exactly thread-safe but this needs to be fast.
// getTimer()->getRealTime() only reads one variable anyway.
u32 getTime()
{
return m_device->getTimer()->getRealTime();
}
/*
Format of a texture name:
"stone.png" (filename in image data directory)
"[crack1" (a name starting with "[" is a special feature)
"[progress1.0" (a name starting with "[" is a special feature)
*/
/*
Loads texture defined by "name" and assigns a texture id to it.
If texture has to be generated, generates it.
If the texture has already been loaded, returns existing id.
*/
textureid_t getTextureId(const std::string &name);
// The reverse of the above
std::string getTextureName(textureid_t id);
// Gets a texture based on a filename
video::ITexture* getTexture(const std::string &name);
// Gets a texture based on a TextureSpec (a textureid_t is fine too)
video::ITexture* getTexture(const TextureSpec &spec);
private:
/*
Non-thread-safe variants of stuff, for internal use
*/
// DEPRECATED NO-OP
//video::ITexture* getTextureDirect(const std::string &spec);
// Constructs a texture according to spec
video::ITexture* getTextureDirect(const TextureSpec &spec);
/*
Members
*/
// The id of the thread that can (and has to) use irrlicht directly
threadid_t m_main_thread;
// The irrlicht device
JMutex m_device_mutex;
IrrlichtDevice *m_device;
// Queued texture fetches (to be processed by the main thread)
RequestQueue<TextureSpec, video::ITexture*, u8, u8> m_get_texture_queue;
// Cache of textures by spec
TextureCache m_texturecache;
// A mapping from texture id to string spec
MutexedIdGenerator<std::string> m_namecache;
};
#endif
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