IMG_FileFilterScale.h

Go to the documentation of this file.

/*
 * 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_FileFilterScale ( IMG Library, C++)
 *
 * COMMENTS:
 *
 *    Scales a file from one res to another.
 *
 */
#ifndef IMG_FILE_FILTER_SCALE_H
#define IMG_FILE_FILTER_SCALE_H

#include "IMG_FileFilter.h"

#include <UT/UT_ValArray.h>
#include <UT/UT_FilterType.h>
#include <UT/UT_NonCopyable.h>


class img_PlaneScale;
class img_MipCache;


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

             UT_NON_COPYABLE(IMG_FileFilterScale)

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

    // fileparms may be passed in when the scale filter is used to generate mip
    // levels, but otherwise should be left null.
    void        initScale(int xres, int yres, UT_FilterType filter,
                          IMG_FileParms *fileparms = nullptr);

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

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

    static IMG_FileFilter       *allocMipLevel0CacheFilter(IMG_File *file,
                                                    IMG_FileParms *fileparms);

private:
    bool         grabScan(void *buffer, int y, int pi, int comp);
    void         finishedScanline(int scan) override;

    UT_ValArray<img_PlaneScale *> myPlaneScale;
    UT_SharedPtr<img_MipCache>    myMipCache;
    int mySupport;

    friend class img_PlaneScale;
};

#endif