ImagePyramidRenderer.hpp

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#pragma once
 
#include <FAST/Visualization/Renderer.hpp>
#include <deque>
#include <thread>
 
namespace fast {
 
class ImagePyramid;
 
class FAST_EXPORT ImagePyramidRenderer : public Renderer {
    FAST_OBJECT(ImagePyramidRenderer)
    public:
        void loadAttributes() override;
        void setIntensityLevel(float level);
        float getIntensityLevel();
        void setIntensityWindow(float window);
        float getIntensityWindow();
        ~ImagePyramidRenderer() override;
        void clearPyramid();
    private:
        ImagePyramidRenderer();
        void draw(Matrix4f perspectiveMatrix, Matrix4f viewingMatrix, float zNear, float zFar, bool mode2D);
 
        std::unordered_map<std::string, uint> mTexturesToRender;
        std::unordered_map<uint, std::shared_ptr<ImagePyramid>> mImageUsed;
        std::unordered_map<std::string, uint> mVAO;
        std::unordered_map<std::string, uint> mVBO;
        std::unordered_map<std::string, uint> mEBO;
 
        // Queue of tiles to be loaded
        std::list<std::string> m_tileQueue; // LIFO queue
        // Buffer to process queue
        std::unique_ptr<std::thread> m_bufferThread;
        // Condition variable to wait if queue is empty
        std::condition_variable m_queueEmptyCondition;
        std::mutex m_tileQueueMutex;
        bool m_stop = false;
        std::unordered_set<std::string> m_loaded;
 
        int m_currentLevel = -1;
 
        cl::Kernel mKernel;
 
        std::shared_ptr<ImagePyramid> m_input;
 
        // Level and window intensities
        float mWindow;
        float mLevel;
 
        void drawTextures(Matrix4f &perspectiveMatrix, Matrix4f &viewingMatrix, bool mode2D);
};
 
}