/*
    This file is part of Nori, a simple educational ray tracer

    Copyright (c) 2015 by Wenzel Jakob

    Nori 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.

    Nori 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/>.
*/
#pragma once

#include <nori/warp.h>
#include <nori/bitmap.h>
#include <map>

NORI_NAMESPACE_BEGIN



/**
 * \brief MIPMAP Class
 */
struct Mipmap {
public:

    Mipmap(){};
    Mipmap(const std::string &filename);

    float get(size_t x, size_t y, size_t size) const;

    Color3f getColor(float x, float y) const;

    size_t getSize() const {
        return m_size;
    }
    float getPDFF() const {
        return m_size*m_size;
    }

private:
    Bitmap m_img;
    size_t m_size;
    float* m_mm;
    float m_maxv;
    std::map<size_t,float*> m_stp;

    void fill_mm(size_t size);
};

NORI_NAMESPACE_END