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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 <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.
*/
class TextureCache
{
public:
TextureCache()
{
m_mutex.Init();
assert(m_mutex.IsInitialized());
}
void set(std::string name, video::ITexture *texture)
{
JMutexAutoLock lock(m_mutex);
m_textures[name] = texture;
}
video::ITexture* get(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;
};
struct TextureMod
{
/*
Returns a new texture which can be based on the original.
Shall not modify or delete the original texture.
*/
virtual video::ITexture * make(video::ITexture *original,
video::IVideoDriver* driver) = 0;
};
struct CrackTextureMod: public TextureMod
{
CrackTextureMod(u16 a_progression)
{
progression = a_progression;
}
virtual video::ITexture * make(video::ITexture *original,
video::IVideoDriver* driver);
u16 progression;
};
/*
A class for specifying a requested texture
*/
struct TextureSpec
{
TextureSpec()
{
mod = NULL;
}
TextureSpec(const std::string &a_name, const std::string &a_path,
TextureMod *a_mod)
{
name = a_name;
path = a_path;
mod = a_mod;;
}
~TextureSpec()
{
}
bool operator==(const TextureSpec &other)
{
return name == other.name;
}
// An unique name for the texture. Usually the same as the path.
// Note that names and paths reside the same namespace.
std::string name;
// This is the path of the base texture
std::string path;
// Modification to do to the base texture
// NOTE: This is deleted by the one who processes the request
TextureMod *mod;
};
/*
A thread-safe wrapper for irrlicht, to be accessed from
background worker threads.
Queues tasks to be done in the main thread.
*/
class IrrlichtWrapper
{
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
u32 getTime()
{
return m_device->getTimer()->getTime();
}
video::ITexture* getTexture(TextureSpec spec);
video::ITexture* getTexture(const std::string &path);
private:
/*
Non-thread-safe variants of stuff, for internal use
*/
video::ITexture* getTextureDirect(TextureSpec spec);
/*
Members
*/
threadid_t m_main_thread;
JMutex m_device_mutex;
IrrlichtDevice *m_device;
TextureCache m_texturecache;
RequestQueue<TextureSpec, video::ITexture*, u8, u8> m_get_texture_queue;
};
#endif
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