fwVtkWindowLevelLookupTable.hpp

/* ***** BEGIN LICENSE BLOCK *****
 * FW4SPL - Copyright (C) IRCAD, 2009-2017.
 * Distributed under the terms of the GNU Lesser General Public License (LGPL) as
 * published by the Free Software Foundation.
 * ****** END LICENSE BLOCK ****** */

#ifndef __FWRENDERVTK_VTK_FWVTKWINDOWLEVELLOOKUPTABLE_HPP__
#define __FWRENDERVTK_VTK_FWVTKWINDOWLEVELLOOKUPTABLE_HPP__

#include "fwRenderVTK/config.hpp"

#include <vtkLookupTable.h>

class FWRENDERVTK_API fwVtkWindowLevelLookupTable : public vtkLookupTable
{
public:
    static fwVtkWindowLevelLookupTable* New();
    vtkTypeMacro(fwVtkWindowLevelLookupTable, vtkLookupTable);
    void PrintSelf(ostream& os, vtkIndent indent) override;

    // Description:
    // Set the window for the lookup table.  The window is the difference
    // between TableRange[0] and TableRange[1].
    void SetWindow(double window)
    {
        this->InverseVideo = window < 0;
        if(this->InverseVideo)
        {
            window = -window;
        }
        if (window < 1e-5)
        {
            window = 1e-5;
        }
        this->Window = window;
        this->SetTableRange(this->Level - this->Window/2.0,
                            this->Level + this->Window/2.0);
    }
    vtkGetMacro(Window, double);

    void BuildInvert();

    // Description:
    // Set the Level for the lookup table.  The level is the average of
    // TableRange[0] and TableRange[1].
    void SetLevel(double level)
    {
        this->Level = level;
        this->SetTableRange(this->Level - this->Window/2.0,
                            this->Level + this->Window/2.0);
    }
    vtkGetMacro(Level, double);

    // Description:
    // Set  on or off.  You can achieve the same effect by
    // switching the LeftClampValue and the RightClampValue.
    vtkSetMacro(Clamping, int);
    vtkGetMacro(Clamping, int);
    vtkBooleanMacro(Clamping, int);

    // Description:
    // Set the minimum table value.  All lookup table entries below the
    // start of the ramp will be set to this color.  After you change
    // this value, you must re-build the lookup table.
    vtkSetVector4Macro(LeftClampValue, double);
    vtkGetVector4Macro(LeftClampValue, double);

    // Description:
    // Set the maximum table value. All lookup table entries above the
    // end of the ramp will be set to this color.  After you change
    // this value, you must re-build the lookup table.
    vtkSetVector4Macro(RightClampValue, double);
    vtkGetVector4Macro(RightClampValue, double);

    unsigned char* GetCurrentPointer(const vtkIdType id);

    // Description:
    // map a set of scalars through the lookup table
    void MapScalarsThroughTable2(void* input, unsigned char* output,
                                 int inputDataType, int numberOfValues,
                                 int inputIncrement, int outputIncrement) override;

protected:
    fwVtkWindowLevelLookupTable(int sze = 256, int ext = 256);
    ~fwVtkWindowLevelLookupTable();

    double Window;
    double Level;
    int InverseVideo;

    int Clamping;
    double RightClampValue[4];
    double LeftClampValue[4];

    vtkUnsignedCharArray* InvertTable;
    vtkTimeStamp InvertTime;

private:
    fwVtkWindowLevelLookupTable(const fwVtkWindowLevelLookupTable&); // Not implemented.
    void operator=(const fwVtkWindowLevelLookupTable&); // Not implemented.
};

#endif //__FWRENDERVTK_VTK_FWVTKWINDOWLEVELLOOKUPTABLE_HPP__