#pragma once

#ifndef LUT_CALIBRATOR_H

#define LUT_CALIBRATOR_H

#include "tcommon.h"

#include "tpixelutils.h"

#include <qopenglbuffer></qopenglbuffer>

#include <qmatrix4x4></qmatrix4x4>

#include <qopenglfunctions></qopenglfunctions>

#include <qset></qset>

#undef DVAPI

#undef DVVAR

#ifdef TOONZQT_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

class QOpenGLShader;

class QOpenGLShaderProgram;

class QOpenGLFramebufferObject;

class QOpenGLTexture;

class QOpenGLContext;

class QColor;

class DVAPI LutCalibrator : public QOpenGLFunctions {

  bool m_isValid       = false;

  bool m_isInitialized = false;

  struct LutTextureShader {

    QOpenGLShader* vert           = nullptr;

    QOpenGLShader* frag           = nullptr;

    QOpenGLShaderProgram* program = nullptr;

    int texUniform                = -1;

    int lutUniform                = -1;

    int lutSizeUniform            = -1;

    int vertexAttrib              = -1;

    int texCoordAttrib            = -1;

  } m_shader;

  QOpenGLTexture* m_lutTex = NULL;

  QOpenGLBuffer m_viewerVBO;

  bool initializeLutTextureShader();

  void createViewerVBO();

  void assignLutTexture();

public:

  // static LutCalibrator* instance();

  LutCalibrator();

  ~LutCalibrator();

  // to be computed once through the software

  void initialize();

  bool isValid() { return m_isValid; }

  bool isInitialized() { return m_isInitialized; }

  void onEndDraw(QOpenGLFramebufferObject*);

  void cleanup();

  void update(bool textureChanged);

};

class DVAPI LutManager  // singleton

{

  bool m_isValid;

  QString m_currentLutPath;

  QSet<lutcalibrator*> m_calibrators;</lutcalibrator*>

  LutManager();

  struct Lut {

    int meshSize;

    float* data = nullptr;

  } m_lut;

public:

  static LutManager* instance();

  ~LutManager();

  bool isValid() { return m_isValid; }

  int meshSize() const { return m_lut.meshSize; }

  const float* data() const { return m_lut.data; }

  bool loadLutFile(const QString& fp);

  void convert(float&, float&, float&);

  void convert(QColor&);

  void convert(TPixel32&);

  QString& getMonitorName() const;

  void registerCalibrator(LutCalibrator* calibrator);

  void removeCalibrator(LutCalibrator* calibrator);

  void update();

};

#endif