gfx_engine.hpp

// This file is part of openCaesar3.
//
// openCaesar3 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.
//
// openCaesar3 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 openCaesar3.  If not, see <http://www.gnu.org/licenses/>.
//
// Copyright 2012-2013 Gregoire Athanase, gathanase@gmail.com


#ifndef GFX_ENGINE_HPP
#define GFX_ENGINE_HPP

#include <list>

#include "picture.hpp"


class GfxEngine
{
public:
   static GfxEngine& instance();

   GfxEngine();
   virtual ~GfxEngine();
   virtual void init() = 0;
   virtual void exit() = 0;

   void setScreenSize(const int width, const int height);
   int getScreenWidth() const;
   int getScreenHeight() const;

   virtual void load_pictures(const std::list<Picture*> &ioPictures);
   virtual void load_picture(Picture& ioPicture) = 0;
   virtual void unload_picture(Picture& ioPicture) = 0;

   virtual void init_frame() = 0;  // start a new frame
   virtual void drawPicture(const Picture &pic, const int dx, const int dy) = 0;
   virtual void exit_frame() = 0;  // display the frame


protected:
   static GfxEngine* _instance;

   int _screen_width;   // screen width
   int _screen_height;  // screen height

};

#endif