GIFShow.h

#ifndef GIFSHOW_H
#define GIFSHOW_H

#define DISPOSAL_NO 0
#define DISPOSAL_NOT 4
#define DISPOSAL_RESTBACK 8
#define DISPOSAL_RESTORE 12

typedef struct
{
    BYTE bit;
    WORD previouscode;
    WORD nextcode;
}GIFTABLE;

class CGIFShow
{
private:
    HDC     m_hWndHDC;
    bool    m_bPause;
    BOOL    m_bAutoStart;
    BOOL    m_bEmbed;
    BYTE    m_cCurentByte,m_cPackedField;
    UINT    m_uBitSize,m_uPrimaryBitSize;
    UINT    m_uRemain,m_uReadByte,m_uBlockSize;
    int     m_iWidth,m_iHeight;
    int     m_iTop,m_iLeft;
    int     m_iFinishCode,m_iResetCode;
    int     m_iPass,m_iRow;
    int     m_iWidth1;
    int     m_iBackgroundColor;
    int     m_iGifSize;
    int     m_x,m_y;
    int     m_iGlobalColorSize;
    int     m_iDisposalMethod;
    BOOL    m_bTransparentIndex;
    int     m_iTransparentIndex;
    int     m_iDelayTime;
    int     m_iTotalReadByte;
    int     m_iMaxByte;
    DWORD   m_dwSpeed;
    COLORREF m_TransparentColor;
    HDC     m_hDC;
    BYTE*   m_pcGlobalColorTable;
    BYTE*   m_pcBitmap;
    BYTE*   m_pcGif;
    BYTE*   m_pcGifTrack;
    BOOL    m_bGlass;
    volatile int m_EndRun;
    HBITMAP m_hRedrawBitmap;
    int     m_iGifWidth,m_iGifHeight;
    volatile BOOL   m_bLockBitmap;
    TCHAR   filename[_MAX_PATH];
    int     flag;
    BOOL    m_bRunMode;
    BOOL    m_bAutoSize1;
    int     m_nPosX;
    int     m_nPosY;

public:
    CGIFShow(HDC pWnd);
    ~CGIFShow();
    void Play();
    void Pause(bool status);///暂停运行
    void Stop();
    void SetPosition(int x,int y);
    BOOL Play1(void);
    BOOL Load(LPCTSTR filename);
    HBITMAP FirstImage(void);
    HBITMAP NextImage(void);
    HBITMAP TakeIt(void);
    HBITMAP DIBTohBitmap(HDC hDC,LPSTR   lpSrcDIB);

    void Output(BYTE bit)
    {
        int tmp;
        if(m_cPackedField&0x40)
        {
            if(m_x==m_iWidth)
            {
                m_x=0;
                if(m_iPass==1)m_iRow+=8;
                if(m_iPass==2)m_iRow+=8;
                if(m_iPass==3)m_iRow+=4;
                if(m_iPass==4)m_iRow+=2;
                if(m_iRow>=m_iHeight){m_iPass+=1;m_iRow=16>>m_iPass;}
            }
            tmp=m_iRow*m_iWidth1+m_x;
            m_pcBitmap[tmp]=bit;
            m_x++;
        }
        else
        {
            if(m_x==m_iWidth){m_x=0;m_y++;}
            tmp=m_y*m_iWidth1+m_x;
            m_x++;
        }
        if(tmp>m_iMaxByte)return;
        m_pcBitmap[tmp]=bit;
    }

    BYTE GetByte(void)
    {
        if(m_uReadByte>=m_uBlockSize)
        {
            m_uBlockSize=*m_pcGifTrack++;
            m_uReadByte=0;
            m_iTotalReadByte+=m_uBlockSize+1;
            if(m_iTotalReadByte>m_iGifSize){m_iTotalReadByte-=m_uBlockSize+1;return 0xFF;}
            if(m_uBlockSize==0){m_pcGifTrack--;m_iTotalReadByte--;return 0xFF;}
        }
        m_uReadByte++;
        return *m_pcGifTrack++;
    }

    WORD GetCode(void)
    {
        UINT tmp1;
        BYTE tmp;
        tmp=1;
        if(m_uRemain>=m_uBitSize)
        {
            tmp<<=m_uBitSize;
            tmp--;
            tmp1=m_cCurentByte&tmp;
            m_cCurentByte>>=m_uBitSize;
            m_uRemain-=m_uBitSize;
        }
        else
        {
            tmp<<=m_uRemain;
            tmp--;
            tmp1=m_cCurentByte;
            m_cCurentByte=GetByte();
            tmp=1;
            if(8>=(m_uBitSize-m_uRemain))
            {
                tmp<<=(m_uBitSize-m_uRemain);
                tmp--;
                tmp1=(((UINT)(m_cCurentByte&tmp))<<m_uRemain)+tmp1;
                m_cCurentByte>>=(m_uBitSize-m_uRemain);
                m_uRemain=8-(m_uBitSize-m_uRemain);
            }
            else
            {
                tmp1=(((UINT)(m_cCurentByte))<<m_uRemain)+tmp1;
                m_cCurentByte=GetByte();
                tmp<<=m_uBitSize-m_uRemain-8;
                tmp--;
                tmp1=(((UINT)(m_cCurentByte&tmp))<<(m_uRemain+8))+tmp1;
                m_cCurentByte>>=m_uBitSize-m_uRemain-8;
                m_uRemain=8-(m_uBitSize-m_uRemain-8);
            }
        }
        return tmp1;
    }

};
#endif