?? gifapi.h
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typedef struct gifheader { BYTE bySignature[3]; BYTE byVersion[3]; } GIFHEADER;typedef struct gifscrdesc { WORD wWidth; WORD wDepth; struct globalflag { BYTE PalBits : 3; BYTE SortFlag : 1; BYTE ColorRes : 3; BYTE GlobalPal : 1; } GlobalFlag; BYTE byBackground; BYTE byAspect; } GIFSCRDESC;typedef struct gifimage { WORD wLeft; WORD wTop; WORD wWidth; WORD wDepth; struct localflag { BYTE PalBits : 3; BYTE Reserved : 2; BYTE SortFlag : 1; BYTE Interlace : 1; BYTE LocalPal : 1; } LocalFlag; } GIFIMAGE;typedef struct gifcontrol { BYTE byBlockSize; struct flag { BYTE Transparency : 1; BYTE UserInput : 1; BYTE DisposalMethod : 3; BYTE Reserved : 3; } Flag; WORD wDelayTime; BYTE byTransparencyIndex; BYTE byTerminator; } GIFCONTROL;typedef struct gifplaintext { BYTE byBlockSize; WORD wTextGridLeft; WORD wTextGridTop; WORD wTextGridWidth; WORD wTextGridDepth; BYTE byCharCellWidth; BYTE byCharCellDepth; BYTE byForeColorIndex; BYTE byBackColorIndex; } GIFPLAINTEXT;typedef struct gifapplication { BYTE byBlockSize; BYTE byIdentifier[8]; BYTE byAuthentication[3]; } GIFAPPLICATION;typedef struct gifd_var { LPSTR lpDataBuff; LPSTR lpBgnBuff; LPSTR lpEndBuff; DWORD dwDataLen; WORD wMemLen; WORD wWidth; WORD wDepth; WORD wLineBytes; WORD wBits; BOOL bEOF; BOOL bInterlace; } GIFD_VAR;typedef GIFD_VAR FAR *LPGIFD_VAR;typedef struct gifc_var { LPSTR lpDataBuff; LPSTR lpEndBuff; DWORD dwTempCode; WORD wWidth; WORD wDepth; WORD wLineBytes; WORD wBits; WORD wByteCnt; WORD wBlockNdx; BYTE byLeftBits; } GIFC_VAR;typedef GIFC_VAR FAR *LPGIFC_VAR;// 宏運算#define DWORD_WBYTES(x) ( (((x) + 31UL) >> 5) << 2 )#define WORD_WBYTES(x) ( (((x) + 15UL) >> 4) << 1 )#define BYTE_WBYTES(x) ( ((x) + 7UL) >> 3 )//常量#define MAX_BUFF_SIZE 32768 /* 32K */#define MAX_HASH_SIZE 5051#define MAX_TABLE_SIZE 4096 /* 12-bit */#define MAX_SUBBLOCK_SIZE 255// 函數原型BOOL WINAPI DIBToGIF(LPSTR lpDIB, CFile& file, BOOL bInterlace);void WINAPI EncodeGIF_LZW(LPSTR lpDIBBits, CFile& file, LPGIFC_VAR lpGIFCVar,WORD wWidthBytes, BOOL bInterlace);void WINAPI GIF_LZW_WriteCode(CFile& file, WORD wCode, LPSTR lpSubBlock, LPBYTE lpbyCurrentBits,LPGIFC_VAR lpGIFCVar);HDIB WINAPI ReadGIF(CFile& file);void WINAPI ReadSrcData(CFile& file, LPWORD lpwMemLen, LPDWORD lpdwDataLen, LPSTR lpSrcBuff, LPBOOL lpbEOF);void WINAPI DecodeGIF_LZW(CFile& file, LPSTR lpDIBBits, LPGIFD_VAR lpGIFDVar,WORD wWidthBytes);
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