ShadowMap.h

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#pragma once
 
#include "GraphicsObject/Buffer.h"
#include "GraphicsObject/Framebuffer.h"
#include "GraphicsObject/Texture.h"
#include "GraphicsObject/Shader.h"
#include "GraphicsObject/Mesh.h"
 
#include <vector>
#include <RenderEngine.h>
 
namespace dyno
{
    class Camera;
    class SceneGraph;
 
    class ShadowMap
    {
    public:
        ShadowMap(int size = 1024);
        ~ShadowMap();
 
        void initialize();
        void release();
 
        void update(dyno::SceneGraph* scene, const dyno::RenderParams& rparams);
 
        // bind uniform block and texture
        void bind(int shadowUniformLoc = 3, int shadowTexSlot = 5);
 
        int  getSize() const;
        void setSize(int size);
 
        int  getNumBlurIterations() const;
        void setNumBlurIterations(int iter);
 
    private:
        // framebuffers
        Framebuffer      mFramebuffer;
        Texture2D      mShadowTex;
        Texture2D      mShadowDepth;
        Texture2D      mShadowBlur;
 
        Program*     mBlurProgram;
        Mesh*           mQuad;
 
 
        Buffer            mShadowUniform;   // uniform buffer for shadow lookup matrices
 
        bool            sizeUpdated = false;
        int             size = -1;
 
        // num of blur interations for VSM
        int             blurIters = 1;
 
    public:
 
        // patch to color bleeding, min p_max
        float           minValue = 0.1f;
    };
}