Texture.h

//Author: Christian Hafner
#pragma once

#include "include_opengl.h"
#include "lodepng.h"
#include <vector>
#include <string>

class Texture
{
public:
    Texture(GLuint textureHandle, GLuint width=0.f, GLuint height=0.f, bool hasMipmaps=false, bool isSingleChannel=false, float anisotropy=1.f);
    ~Texture();

    bool hasMipmaps() const;
    bool isSingleChannel() const;
    float getAnisotropy() const;

    GLuint getTextureHandle() const;

    static Texture* createFromPNG(std::string& path, bool mipmaps=false, bool singleChannel=false, float anisotropy=1.0f);
    static Texture* createFromPNG(const std::vector<std::string>& paths);

    
    unsigned _width, _height;

private:
    Texture();

    static double evalScatteringIntegrand(double u, double xi);

    bool _hasMipmaps;
    bool _isSingleChannel;
    float _anisotropy;

    GLuint _textureHandle;

    

    static GLuint loadPNG(std::string& path, bool mipmaps, bool singleChannel, float anisotropy, unsigned* width=nullptr, unsigned* height=nullptr);
};