SSAO.hpp

#pragma once
 
#include "processing/BilateralBlur.hpp"
#include "processing/BoxBlur.hpp"
#include "resources/Texture.hpp"
#include "resources/Buffer.hpp"
#include "Common.hpp"
 
class SSAO {
 
public:
 
    enum class Quality : int {
        LOW = 0, 
        MEDIUM = 1, 
        HIGH = 2 
    };
 
    SSAO(uint width, uint height, uint downscale, float radius, const std::string & name);
 
    void process(const glm::mat4 & projection, const Texture& depthTex, const Texture& normalTex);
 
    void resize(uint width, uint height);
 
    void clear() const;
 
    const Texture * texture() const;
 
    float & radius();
 
    Quality & quality();
 
private:
    Texture _ssaoTexture;                           
    Texture _finalTexture;                          
    BilateralBlur _highBlur;                        
    BoxBlur _mediumBlur;                            
    Program * _programSSAO;                         
    UniformBuffer<glm::vec4> _samples; 
    Texture _noisetexture = Texture("SSAO noise");  
    float _radius = 0.5f;   
    uint _downscale = 1;    
    Quality _quality = Quality::MEDIUM; 
};