MeVisLab/Standard/Sources/Inventor/SoView2D/View2DShader.h

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#ifndef __View2DShader_H
#define __View2DShader_H
//----------------------------------------------------------------------------------
// **InsertLicense** code
//----------------------------------------------------------------------------------

//----------------------------------------------------------------------------------

#ifndef __SoView2DSystem_H
#include "SoView2DSystem.h"
#endif

#ifndef __mlDataTypes_H
#include "mlDataTypes.h"
#endif

#include "View2DTexture.h"
#include "mlGLResourceManager.h"

#define VIEW2D_BICUBIC_FILTER_TEX_SIZE 256

// declare the LUTData
ML_START_NAMESPACE
template <typename T> class LUTData;
ML_END_NAMESPACE

class SOVIEW2D_API View2DShader {
public:
  View2DShader();
  virtual ~View2DShader();

  virtual const char* name() = 0;

  virtual void bind(View2DTexture* texture, int tw, int th) = 0;

  virtual void unbind() = 0;

  virtual void getRequiredTextureLayout(View2DTexture *texture, GLuint &format, GLuint &internalFormat, GLuint &transferDataType);

  virtual void setLut(ml::LUTData<MLuint8>* newLut) { _lut = newLut; }

  ml::LUTData<MLuint8>* getLut() { return _lut; }

  void invalidateLut() { _lastLutChangeID = 0; }

protected:

  ml::LUTData<MLuint8>* _lut;

  MLuint32 _lastLutChangeID;

  int _lastLutSize;

};

//-----------------------------------------------------------------------------------------------
class View2DTextureLUTShader : public View2DShader {

public:
  View2DTextureLUTShader();
  virtual ~View2DTextureLUTShader();

protected:
  void createLutTexture();

  void updateLutTexture();

  void destroyLutTexture();

  void createFilterKernelTexture();
  void destroyFilterKernelTexture();

  ml::GLTexture _lutTexture;
  ml::GLTexture _kernelTexture;

  int    _lutTextureWidth;
  int    _lutTextureHeight;
  int    _lutHeight;
};

#endif