IMG_FileFilterLUT.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:        IMG_FileFilterLUT ( IMG Library, C++)
 *
 * COMMENTS:
 *
 *    Applies a LUT and/or gamma to the scanlines.
 */
#ifndef IMG_FILE_FILTER_LUT_H
#define IMG_FILE_FILTER_LUT_H

#include <SYS/SYS_Types.h>
#include <UT/UT_BitArray.h>
#include <UT/UT_StringHolder.h>
#include <UT/UT_ValArray.h>
#include <PXL/PXL_Fill.h>

#include "IMG_FileFilter.h"

class PXL_Raster;
class PXL_Lookup;

class IMG_API IMG_FileFilterLUT : public IMG_FileFilter
{
public:
    IMG_FileFilterLUT(IMG_File *file_to_filter);
            ~IMG_FileFilterLUT() override;

    const char  *className() const override { return "IMG_FileFilterLUT"; }

    void     init(const char *lutname, const char *lut_scope,
                  fpreal gamma, const char *gamma_scope,
                  bool is_ocio, const char *ocio_colorspace,
                  const char *ocio_looks);

    const void  *readPlaneScanline(int y, const IMG_Plane &pi) override;
    
    int          writePlaneScanline(const void *data, int y,
                                    const IMG_Plane &pi) override;

    void         computeCommonData() override;

private:
    void         applyGammaLUT(void *dest, const void *sdata,
                               const IMG_Plane &pi, bool dogamma, bool dolut);
    void         applyOCIO(int y, void *dest, const void *sdata,
                           const IMG_Plane &pi,
                           const UT_StringHolder &src_colorspace,
                           const UT_StringHolder &dest_colorspace,
                           const UT_StringHolder &looks);
    bool         myIsOCIO;
    bool         myOCIONoOp;
    PXL_Lookup  *myLookup;
    UT_StringHolder myLUTScopeString;
    UT_StringHolder myOCIOColorspaceA;
    UT_StringHolder myOCIOColorspaceB;
    UT_StringHolder myOCIOLooks;
    UT_BitArray  myLUTScope;
    
    fpreal       myGamma;
    UT_StringHolder myGammaScopeString;
    UT_BitArray  myGammaScope;
    
    UT_ValArray<PXL_Raster *> myScanRaster;

    // We cache this so we can share the gamma table between
    // invocations.
    PXL_FillParms       myFill;
};


#endif