#ifndef SSAOSHADER_H
#define SSAOSHADER_H

#include "client/engine/shader/ShaderProgram.h"

class SSAOShader
{
public:
    SSAOShader();
    virtual ~SSAOShader();
    
    bool init();
    void resize();

    void preRender(const float* projMatrix);
    
    void bindTexture(unsigned int textureUnit);
    void bindNoiseTexture(unsigned int textureUnit);
    
    void setNumberOfSamples(int amount);
    int getNumberOfSamples() const;
    void setSampleRadius(float sampleRadius);
    float getSampleRadius() const;
    
private:
    // shader
    ShaderProgram program;
    // framebuffer
    GLuint framebuffer = 0;
    // textures
    GLuint texture = 0;
    GLuint noiseTexture = 0;
    // uniform data
    int numberOfSamples = 32;
    float radius = 2.5f;
    // uniforms locations
    GLint unifProjMatrix = 0;
    GLint unifNumberOfSamples = 0;
    GLint unifRadius = 0;
    GLint unifWidth = 0;
    GLint unifHeight = 0;
};

#endif