jpeg.h

#pragma once

class CJpegEncoder
{
        static const int ColorComponents = 3;

        int m_w, m_h;
        BYTE* m_p;

        unsigned int m_bbuff, m_bwidth;
        bool PutBit(int b, int n);
        void Flush();
        int GetBitWidth(short q);

        void WriteSOI();
        void WriteDQT();
        void WriteSOF0();
        void WriteDHT();
        void WriteSOS();
        void WriteEOI();

protected:
        virtual bool PutByte(BYTE b) = 0;
        virtual bool PutBytes(const void* pData, int len) = 0;
        virtual bool Encode(const BYTE* dib);

public:
        CJpegEncoder();
};

class CJpegEncoderFile : public CJpegEncoder
{
        CString m_fn;
        FILE* m_file;

protected:
        bool PutByte(BYTE b);
        bool PutBytes(const void* pData, int len);

public:
        CJpegEncoderFile(LPCTSTR fn);

        bool Encode(const BYTE* dib);
};

class CJpegEncoderMem : public CJpegEncoder
{
        CArray<BYTE>* m_pdata;

protected:
        bool PutByte(BYTE b);
        bool PutBytes(const void* pData, int len);

public:
        CJpegEncoderMem();

        bool Encode(const BYTE* dib, CArray<BYTE>& data);
};

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