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/*
* Copyright (C) 2010 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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/>.
*
* Authored by Gordon Allott <gord.allott@canonical.com>
*/
#ifndef TEXTURECACHE_H
#define TEXTURECACHE_H
#include <Nux/Nux.h>
#include <string>
#include <map>
#include <vector>
#include <sigc++/sigc++.h>
/* Basically a nice simple texture cache system, you ask the cache for a texture by id
* if the texture does not exist it calls the callback function you provide it with to create the
* texture, then returns it.
* you should remember to ref/unref the textures yourself however
*/
class TextureCache
{
public:
// id, width, height, texture
typedef sigc::slot<void, const char *, int, int, nux::BaseTexture **> CreateTextureCallback;
/* don't new this class, use getdefault */
static TextureCache * GetDefault ();
nux::BaseTexture * FindTexture (const char *texture_id, int width, int height, CreateTextureCallback callback);
protected:
TextureCache ();
~TextureCache ();
char * Hash (const char *id, int width, int height);
std::map<std::string, nux::BaseTexture *> _cache;
std::map<nux::BaseTexture *, std::string> _cache_inverse; // just for faster lookups
void OnDestroyNotify (nux::Trackable *Object);
};
#endif // TEXTURECACHE_H
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