#ifndef TEXTUREREDUX_H
#define TEXTUREREDUX_H

#include "framebuffer.h"
#include <glm/vec3.hpp>

class FrameBuffer;
class Shader;

class TextureRedux
{
    FrameBuffer ping;
    FrameBuffer pong;

    FrameBuffer* m_input;

    Shader* m_shader;

    enum UniformLocation {
        SAMPLER,
        WIDTH,
        HEIGTH,
    };
    GLuint uniformLocations[3];

public:
    /**
     * the input texture must be of type GL_FLOAT and format GL_RGB
     */
    TextureRedux(FrameBuffer* input, int textureId = 0);
    ~TextureRedux();
    void setShader(Shader* shader);
    glm::vec3 redux();
};

#endif // TEXTUREREDUX_H