ImgControl.h

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#pragma once
#ifndef __ImgControl_h
#define __ImgControl_h

#include <atlbase.h>


#ifdef OPH_EXPORT
#define OPH_DLL __declspec(dllexport)
#else
#define OPH_DLL __declspec(dllimport)
#endif
namespace oph
{
    enum FLIP
    {
        NONE,
        VERTICAL,
        HORIZONTAL,
        BOTH
    };

    enum TYPE
    {
        BMP,
        JPG,
        PNG,
        TIFF,
        GIF
    };

    class OPH_DLL ImgControl
    {
    private:
        ImgControl();
        ~ImgControl();
        static ImgControl *instance;
        static void Destroy() {
            delete instance;
        }
    public:
        static ImgControl* getInstance() {
            if (instance == nullptr) {
                instance = new ImgControl();
                atexit(Destroy);
            }
            return instance;
        }

        bool Save(const char *path, BYTE *pBuf, UINT len, int quality = 100);
        int CalcBitmapSize(int w, int h, int ch) { return (((w * ch) + 3) & ~3) * h; }
        bool GetSize(const char* path, unsigned int *size);
        void Resize(unsigned char* src, unsigned char* dst, int w, int h, int neww, int newh, int ch);
        bool Rotate(double rotate, unsigned char *src, unsigned char *dst, int w, int h, int neww, int newh, int ch);
        bool Flip(FLIP mode, unsigned char *src, unsigned char *dst, int w, int h, int ch);
        bool Crop(unsigned char *src, unsigned char *dst, int w, int h, int ch, int x, int y, int neww, int newh);


    private:
        int GetEncoderClsid(const WCHAR *format, CLSID *pClsid);
        char* GetExtension(const char *path);
    };
}
#endif