BRDFLUTShader.h

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#pragma once
 
#include <tdme/tdme.h>
#include <tdme/engine/subsystems/framebuffer/fwd-tdme.h>
#include <tdme/engine/subsystems/renderer/fwd-tdme.h>
#include <tdme/engine/ColorTexture.h>
 
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::ColorTexture;
 
/**
 * BRDFLUT render shader
 * @author Andreas Drewke
 */
class tdme::engine::subsystems::framebuffer::BRDFLUTShader final: public ColorTexture
{
 
private:
    static constexpr int BRDFLUT_WIDTH { 1024 };
    static constexpr int BRDFLUT_HEIGHT { 1024 };
 
    Renderer* renderer { nullptr };
    int32_t vertexShaderId { -1 };
    int32_t fragmentShaderId { -1 };
    int32_t programId { -1 };
    int32_t colorBufferTextureId { 0 };
    int32_t frameBufferId { -1 };
    bool initialized { false };
 
public:
    // forbid class copy
    FORBID_CLASS_COPY(BRDFLUTShader)
 
    /**
     * Public constructor
     * @param renderer renderer
     */
    BRDFLUTShader(Renderer* renderer);
 
    /**
     * Public destructor
     */
    ~BRDFLUTShader();
 
    /**
     * @return if initialized and ready to use
     */
    bool isInitialized();
 
    /**
     * Initialize
     */
    void initialize();
 
    /**
     * Generate
     */
    void generate();
 
    /**
     * @return color texture id
     */
    inline int32_t getColorTextureId() override {
        return colorBufferTextureId;
    }
};