/**
 * chro.mono: A very circular color puzzle game
 * https://thp.io/2013/chromono/
 * Copyright (C) 2013-2021 Thomas Perl <m@thp.io>
 *
 * 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 SHADYPOSTPROC_RENDERABLE_H
#define SHADYPOSTPROC_RENDERABLE_H

#include "shadypostproc.h"
#include "chromono_opengl.h"

class Renderable {
    public:
        Renderable() {}
        virtual ~Renderable();

        // By default, a renderable has no preparation steps
        virtual void prepare() {}

        void activate();
        void deactivate();

        bool is_active() { return active == this; }

        static void unbind_active() {
            if (active != NULL) {
                active->deactivate();
            }
        }

    protected:
        virtual void bind() = 0;
        virtual void unbind() = 0;

    private:
        static Renderable *active;
};

#endif /* SHADYPOSTPROC_RENDERABLE_H */
