IMG_FileFilterGainOffset.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_FileFilterGainOffset ( IMG Library, C++)
 *
 * COMMENTS:
 *
 *    Apply gain and offset to image in that order.
 */
#ifndef IMG_FILE_FILTER_GAIN_OFFSET_H
#define IMG_FILE_FILTER_GAIN_OFFSET_H

#include <SYS/SYS_Types.h>
#include <UT/UT_BitArray.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_FileFilterGainOffset : public IMG_FileFilter
{
public:
             IMG_FileFilterGainOffset(IMG_File *file_to_filter);

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

    void     init(fpreal gain, fpreal offset);

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

private:
    void applyGainOffset(void *dest, const void *sdata,
                         const IMG_Plane &pi);

    fpreal       myGain;
    fpreal       myOffset;
};


#endif