pngprgrs.h

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// $Id: pngprgrs.h 751 2006-03-31 15:43:49Z alex $
// PNG progress bar class
// Jonathan Payne 8/2000
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 */

#ifndef INC_PNGPRGRS
#define INC_PNGPRGRS

//#include "ccfile.h"

/********************************************************************************************

>   class PNGProgressBar : public CC_CLASS_MEMDUMP

    Author:     Jonathan_Payne (Xara Group Ltd) <camelotdev@xara.com>
    Created:    30/8/2000
    Purpose:    Controls the status bar while loading / saving png files

********************************************************************************************/

class PNGProgressBar : public CC_CLASS_MEMDUMP
{
public:
    // Give name in memory dumps
    CC_DECLARE_MEMDUMP(PNGProgressBar);

    // Start status bar
    PNGProgressBar(String_64 *ProgressString, bool new_interlaced, UINT32 new_height);

    // Stop status bar
    ~PNGProgressBar();

    // Function given as a pointer to libpng
    void UpdateCallback(png_structp png_ptr, png_uint_32 row_number, INT32 pass);

protected:
    PNGProgressBar();       // Default constructor - Do not use

private:
    bool    show_progress_bar;      // Show progress bar?
    bool    interlaced;         // Is the image interlaced
    UINT32  height;             // Image height
    INT32       next_update;        // Next value to update status bar at
                                // For interlaced image this = pass
                                // for non-interlaced image it is based on image height
//  const UINT32 updates = 10       // Number of updates of status bar (non-interlaced images
                                // only)
};

#endif//INC_PNGPRGRS

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