UT_FileLUT.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        UT library (C++)
 *
 * COMMENTS:
 *      Defines a LUT that is read from a file; values are assumed to be
 *      unsigned shorts.
 * 
 */

#ifndef __UT_FILE_LUT_H__
#define __UT_FILE_LUT_H__

#include "UT_API.h"
#ifndef WIN32
#include <sys/stat.h>
#endif

#include "UT_String.h"

class UT_API UT_FileLUT
{
public:
    enum {
        LOAD_FORWARD_LUT = 0,
        LOAD_INVERSE_LUT,
        LOAD_FULL_LUT
    };

    enum {
        CINEON_CLIPPED = 0,
        CINEON_FULL_RANGE,
        CINEON_WHITE_GIVEN
    };
    

             UT_FileLUT();
    virtual ~UT_FileLUT();

    UT_FileLUT &operator=(const UT_FileLUT &) ;
    int         operator==(const UT_FileLUT &) const;

    // loads a LUT file
    int         load(const char *name, int lutsize, int lutrange,
                     int mode = LOAD_FORWARD_LUT);

    // creates a cineon LUT 
    int         createCineon(int white_point, fpreal gamma, int full_range,
                             int mode = LOAD_FORWARD_LUT,int imagepnt = 4095);

    void        create(int size, float *data, int range,
                       int mode = LOAD_FORWARD_LUT,
                       const char *filename = 0,
                       int whitepoint = 65535);
    
    // LUT accessers
    int                         getLUTSize() const    { return myLUTSize; }
    unsigned short *            getLUT()              { return myLUT; }
    const unsigned short *      getLUT() const        { return myLUT; }

    int                         getInvLUTSize() const { return myInvLUTSize; }
    unsigned short *            getInvLUT()           { return myInvLUT; }
    const unsigned short *      getInvLUT() const     { return myInvLUT; }

    int                         getWhitePoint() const
                                { return myComputedWhitePoint; }

    // comparison functions
    int                  compareExistingLUT(const char *name, int mode);
    int                  compareExistingLUT(int white, fpreal gamma,
                                            int mode, int iwhite);

    void                 debugOut(const char *file);

private:

    int                  myLUTSize;
    unsigned short      *myLUT;
    int                  myInvLUTSize;
    unsigned short      *myInvLUT;

    // comparison info
    int                  myCreationMode;
    UT_String            myFilename;
    int                  myWhitePoint;
    int                  myImageWhite;
    float                myGamma;

#ifndef WIN32    
    time_t               myFileCreationTime;
#endif

    // the image white point.
    int                 myComputedWhitePoint;
};

#endif