IMG/IMG_FileFilterFlip.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.
 *
 * Produced by:
 *      Mark Alexander
 *      Side Effects Software Inc
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        IMG_FileFilterFlip ( IMG Library, C++)
 *
 * COMMENTS:
 *
 *    Read/Write from a memory buffer.
 *    Supports vertical and horizontal flips, as well as flopping (90' rot). 
 */
#ifndef IMG_FILE_FILTER_FLIP_H
#define IMG_FILE_FILTER_FLIP_H

class PXL_Raster;

#include <UT/UT_BitArray.h>
#include <UT/UT_PtrArray.h>

#include "IMG_FileFilter.h"

class IMG_API IMG_FileFilterFlip : public IMG_FileFilter
{
public:
             IMG_FileFilterFlip(IMG_File *file_to_filter);
    virtual ~IMG_FileFilterFlip();

    virtual const char  *className() const { return "IMG_FileFilterFlip"; }
    
    void         init(bool flipx, bool flipy, bool flop);

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

    virtual int  isTopFirst() const;
    virtual void computeCommonData();
    
private:
    
    const void  *extractScanline(int y, const PXL_Raster *p);
    bool         fillRasters();
    virtual void         finishedScanline(int scan);

    void         flipHorizontal(void *dest, const void *source,
                                const IMG_Plane &pi);
    
    bool         myXFlip;
    bool         myYFlip;
    bool         myFlop;
    bool         myUseRasters;
    bool         myRastersFilled;
    
    UT_PtrArray<PXL_Raster *>    myPlaneImage;
    void       *myRasterBuffer;
};

#endif

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