www.pudn.com > viewImage.rar > GIFAPI.H

 
#include "DIBAPI.H" 
 
typedef struct tagGIFHEADER 
{ 
	BYTE bySignature[3]; 
	BYTE byVersion[3]; 
}  GIFHEADER; 
 
typedef struct tagGIFSCRDESC 
{ 
	WORD wWidth; 
	WORD wDepth; 
	struct tagGlobalFlag 
	{ 
		BYTE PalBits   : 3; 
		BYTE SortFlag  : 1; 
		BYTE ColorRes  : 3; 
		BYTE GlobalPal : 1; 
	}  GlobalFlag; 
	BYTE byBackground; 
	BYTE byAspect; 
}  GIFSCRDESC; 
 
typedef struct tagGIFIMAGE 
{ 
	WORD wLeft; 
	WORD wTop; 
	WORD wWidth; 
	WORD wDepth; 
	struct tagLocalFlag 
	{ 
		BYTE PalBits   : 3; 
		BYTE Reserved  : 2; 
		BYTE SortFlag  : 1; 
		BYTE Interlace : 1; 
		BYTE LocalPal  : 1; 
	}  LocalFlag; 
}  GIFIMAGE; 
 
typedef struct tagGIFCONTROL 
{ 
	BYTE byBlockSize; 
	struct tagFlag 
	{ 
		BYTE Transparency   : 1; 
		BYTE UserInput      : 1; 
		BYTE DisposalMethod : 3; 
		BYTE Reserved       : 3; 
	}  Flag; 
	WORD wDelayTime; 
	BYTE byTransparencyIndex; 
	BYTE byTerminator; 
}  GIFCONTROL; 
 
typedef struct tagGIFPLAINTEXT 
{ 
	BYTE byBlockSize; 
	WORD wTextGridLeft; 
	WORD wTextGridTop; 
	WORD wTextGridWidth; 
	WORD wTextGridDepth; 
	BYTE byCharCellWidth; 
	BYTE byCharCellDepth; 
	BYTE byForeColorIndex; 
	BYTE byBackColorIndex; 
}  GIFPLAINTEXT; 
 
typedef struct tagGIFAPPLICATION 
{ 
	BYTE byBlockSize; 
	BYTE byIdentifier[8]; 
	BYTE byAuthentication[3]; 
}  GIFAPPLICATION; 
 
typedef struct tagGIFDATAPARAM 
{ 
	LPSTR lpDataBuff; 
	LPSTR lpBgnBuff; 
	LPSTR lpEndBuff; 
	DWORD dwDataLen; 
	WORD  wMemLen; 
	WORD  wWidth; 
	WORD  wDepth; 
	WORD  wLineBytes; 
	WORD  wBits; 
	BOOL  bEOF; 
	BOOL  bInterlace; 
}  GIFDATAPARAM; 
typedef GIFDATAPARAM FAR *LPGIFDATAPARAM; 
 
typedef struct tagGIFCONTROLPARAM 
   { 
      LPSTR lpDataBuff; 
      LPSTR lpEndBuff; 
      DWORD dwTempCode; 
      WORD  wWidth; 
      WORD  wDepth; 
      WORD  wLineBytes; 
      WORD  wBits; 
      WORD  wByteCnt; 
      WORD  wBlockNdx; 
      BYTE  byLeftBits; 
   }  GIFCONTROLPARAM; 
typedef GIFCONTROLPARAM FAR *LPGIFCONTROLPARAM; 
 
 
// 宏运算 
#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 
 
// 函数原型 
BOOL SaveGIF(LPCSTR lpszFileName, LPSTR lpDIB, BOOL bInterlace); 
void EncodeGIF(CFile& file, LPSTR lpDIBBits,  
			  LPGIFCONTROLPARAM lpGIFControlParam, 
			  WORD wWidthBytes, BOOL bInterlace); 
void WriteCodeGIF(CFile& file, WORD wCode, LPSTR lpSubBlock, 
				  LPBYTE lpbyCurrentBits, LPGIFCONTROLPARAM lpGIFControlParam); 
 
HDIB ReadGIF(LPCSTR lpszFileName); 
void ReadSrcDataGIF(CFile& file, LPWORD lpwMemLen, LPDWORD lpdwDataLen, 
                    LPSTR lpSrcBuff, LPBOOL lpbEOF); 
void DecodeGIF(CFile& file, LPSTR lpDIBBits, 
			  LPGIFDATAPARAM lpGIFDataParam,WORD wWidthBytes);