<精通Visual C++图像处理编程>源码 对于图像处理很有帮助

源代码在线查看: gif.h

软件大小: 2004 K
上传用户: lhf123290507
关键词: Visual 图像处理 lt gt
下载地址: 免注册下载 普通下载 VIP

相关代码

				// Gif.h: interface for the CGif class.
				//
				//////////////////////////////////////////////////////////////////////
				
				#if !defined(AFX_GIF_H__82031240_001C_11D3_9481_000021003EA5__INCLUDED_)
				#define AFX_GIF_H__82031240_001C_11D3_9481_000021003EA5__INCLUDED_
				
				#if _MSC_VER > 1000
				#pragma once
				#endif // _MSC_VER > 1000
				
				#include "Dib.h"
				
				//////////////////////////////////////////////////////////////////
				// constants
				//
				#define MAXCOLORMAPSIZE			256
				#define CM_RED					0
				#define CM_GREEN				1
				#define CM_BLUE					2
				#define MAX_LZW_BITS			12
				#define BITS				    12
				#define HSIZE					5003            /* 80% occupancy */
				#define INTERLACE				0x40
				#define LOCALCOLORMAP			0x80
				
				//////////////////////////////////////////////////////////////////
				// macros
				//
				#define BitSet(byte,bit)		(((byte) & (bit))==(bit))
				#define ReadOK(file,buffer,len) (fread(buffer,len,1,file)!=0)
				#define LM_to_uint(a,b)			(((b)				#define MAXCODE(n_bits)        (((code_int) 1 				
				//////////////////////////////////////////////////////////////////
				// owner type
				//
				typedef short int				code_int;	/* was int */
				typedef long int				count_int;
				typedef unsigned char			pixval;
				typedef unsigned char			char_type;
				
				//////////////////////////////////////////////////////////////////
				// structures
				//
				typedef struct tagGIFSCREEN
				{
					unsigned int Width;
					unsigned int Height;
					unsigned char ColorMap[3][MAXCOLORMAPSIZE];
					unsigned int BitPixel;
					unsigned int ColorResolution;
					unsigned int BackGround;
					unsigned int AspectRatio;
				} GIFSCREEN;
				
				typedef struct tagGIF89
				{
					int transparent;
					int delayTime;
					int inputFlag;
					int disposal;
				} GIF89;
				
				////////////////////////////////////////////////////////////
				// class CGif
				//
				class AFX_EXT_CLASS CGif  
				{
				// constructor
				public:
					CGif();
					CGif(CDib *pDib);
					virtual ~CGif();
				
				// public functions
				public:
					// Get CDib
					CDib * GetDib()
					{
						return m_pDib;
					}
					//Set CDib
					BOOL SetDib(CDib *pDib)
					{
						if (pDib == NULL)
							return FALSE;
				
						if (m_pDib != NULL)
							delete m_pDib;
				
						m_pDib = pDib->Clone();
				
						return (m_pDib != NULL);
					}
					// Load GIF file
					BOOL Load(LPCTSTR lpstrFileName);
					// save GIF file
					BOOL Save(LPCTSTR lpstrFileName, CDib* pDib = NULL);
					// get error string
					CString GetErrorString();
				
				// internal functions
				private:
					// read to RGB
					LPBYTE ReadGIFFile(LPCTSTR lpstrFileName, UINT *uWidth, UINT *uHeight);
					// write 256 RGB to file
					BOOL WriteGIFFile(LPCTSTR lpstrFileName, BYTE* buf, int GWidth, int GHeight,
									  int BackGround, int Red[], int Green[], int Blue[]);
					// free allocate memory
					void FreeBuffer(BYTE *Buffer);
					int	ReadColorMap (FILE *fd, int number, BYTE buffer[3][MAXCOLORMAPSIZE]);
					int	DoExtension (FILE *fd,int label);
					int	GetDataBlock (FILE *fd, BYTE *buf);
					int	GetCode (FILE *fd, int code_size, int flag);
					int	LZWReadByte (FILE *fd,int flag, int  input_code_size);
					BOOL ReadImage(FILE *fd, BYTE  * bigMemBuf, int width, int height,
								   BYTE cmap[3][MAXCOLORMAPSIZE], int interlace);
					void BumpPixel();
					int GIFNextPixel();
					void Putword(int w, FILE* fp);
					void compress(int init_bits, FILE* outfile);
					void output(code_int code);
					void cl_block();
					void cl_hash(count_int hsize);
					void writeerr();
					void char_init();
					void char_out(int c);
					void flush_char();
					BYTE* MakeDwordAlign(BYTE *dataBuf,			// input buf
										 UINT widthPix,				// input pixels
										 UINT height,				// lines
										 UINT *uiOutWidthBytes);	// new width bytes
					BYTE* ClearDwordAlign(BYTE *inBuf,				// input buf
										UINT widthPix,				// input size
										UINT height,
										UINT nBpp);
					BOOL VertFlipBuf(BYTE * inbuf,						// input buf
								   UINT widthBytes,							// input width bytes
								   UINT height);							// height
					BOOL BGRFromRGB(BYTE *buf,							// input buf
									UINT widthPix,								// width in pixels
									UINT height);								// lines
				
				// priovate data
				private:
					// attributes
					CDib*	m_pDib;
				
					// data
					int		ZeroDataBlock;
					CString m_strGIFError;
				
					int 			Width, Height;
					int				curx, cury;
					long 			CountDown;
					unsigned long	cur_accum;
					int				cur_bits;
					unsigned char	*buffer;
				
					int n_bits;                         /* number of bits/code */
					int maxbits;						/* user settable max # bits/code */
					code_int maxcode;                   /* maximum code, given n_bits */
					code_int maxmaxcode;				/* should NEVER generate this code */
					count_int htab [HSIZE];
					unsigned short codetab [HSIZE];
					code_int free_ent;                  /* first unused entry */
					int clear_flg;
					int g_init_bits;
					FILE* g_outfile;
					int ClearCode;
					int EOFCode;
				
					int a_count;
					char accum[256];
				};
				
				#endif // !defined(AFX_GIF_H__82031240_001C_11D3_9481_000021003EA5__INCLUDED_)
							

相关资源