dibdc.h

实现JPEG编码功能

//////////////////////////////////////////////////////////////////////

#if !defined THERE_IS_A_DIBDC_H_FILE
#define THERE_IS_A_DIBDC_H_FILE

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

class CDIBDC : public CDC  
{
	DECLARE_DYNAMIC(CDIBDC)

public:
	CDIBDC();
	virtual ~CDIBDC();

protected:
	//DIB attribute
	HBITMAP		m_hDIBitmap;
	BITMAPINFO	m_BitmapInfo;	//Bitmap information(about DIB)
	BYTE**		m_Index;		//Bitmap data index
	BYTE*		m_pData;		//Bitmap data
#ifdef THERE_IS_A_ENCRYPTION_H_FILE
	CEncryption	m_Encryption;
#endif

protected:

	//Reset DIB use parameter have been ready
	BOOL ResetDIB();
	//Set data index
	BYTE** LockIndex();
	//Delete data index
	void UnlockIndex();

private:
	VOID ResetParams();
	
public:
	BOOL IsValid();
	BOOL Load();
	BOOL Load(LPCTSTR lpszPathName);
	BOOL Load(BYTE *pData, int FileLength);
	VOID DestroyDIB();
	DWORD DIBHeaderSize();
	VOID SaveToDIBHeader(PVOID pDIB);
	HBITMAP GetBitmapHandle();
	/////////////////////////////////////////////////////
	//Initialize or resize DIB//
	//用于创建DIBDC. 

	//Create a DIB with new size, new bits(at the same time, delete old DIB)
	BOOL CreateDIB(LONG width, LONG height, WORD bits);
	//Create a DIB with a new size, colortable is retained, data is deleted
	BOOL ResizeDIB(LONG width,LONG height);
	//Set the DIB with the same color
	VOID SetFillColor(COLORREF color);
	
	//////////////////////////////////////////////////////
	//CDIBDC <--> array//
	//用于图像数据的直接存取. 

	//Get data
	BYTE* GetData();
	//Set data
	VOID SetData(CONST VOID *pData);
	//Get data index
	BYTE** GetIndex();
	//Get a pixel at (x,y), example: GetAt(x,y,(WORD*)pColor);
	VOID GetAt(INT x, INT y, ...);
	//Set a pixel at (x,y), example: SetAt(x,y,(WORD)Color);
	VOID SetAt(INT x, INT y, ...);


	///////////////////////////////////////////
	//CDIBDC <--> CDIBDC//
	//用于DIBDC间的赋值, 复制, 有的函数功能一致, 只有描述的不同. 

	//Overload the construct function, Create a copy of DIBDC
	CDIBDC(CDIBDC& DIBDC);
	//Overload the operator '=', left DC is a copy of right DC
	CDIBDC& operator=(CDIBDC& DIBDC);
	//Create a new DIB which is the same as DIB of DIBDC,
	//same data, and same colortable
	BOOL CreateDIB(CDIBDC& DIBDC);
	//Create a new DIB, use the content in rect(x,y,width,height) in DIB in DIBDC
	BOOL CreateDIB(CDIBDC& DIBDC, INT x, INT y, INT width, INT height);
	//Add DIB in DIBDC to this CDIBDC, origin points at (x,y), 
	//IsSuitable is a flag to change or nochange the size of this CDIBDC
	BOOL AddDIB(CDIBDC& DIBDC, INT x=0, INT y=0, BOOL IsSuitable=TRUE);

	//////////////////////////////////////////
	//CDIBDC <--> Clipboard//
	//用于剪贴板操作
	
	//Test the data in clipboard if it is CF_DIB
	BOOL ClipboardAvailable();
	//Paste DIB from clipboard
	BOOL ClipboardPaste();
	//Copy DIB to clipboard
	BOOL ClipboardCopy();

	////////////////////////////////////////////
	//CDIBDC <--> Memory //
	//用于剪贴板操作中的内存转移或自定义的进程间共享数据. 

	//pDIB指向的内存数据格式符合CF_DIB(剪贴板中和设备无关的位图)格式.
	BOOL LoadFromMem(PVOID pDIB);
	VOID SaveToMem(PVOID pDIB);

	//得到符合CF_DIB格式的内存区大小. 
	DWORD DIBSize();

	////////////////////////////////////////////
	//CDIBDC <--> file//
	//用于DIBDC和文件交换数据. 
	//Open image from indicated file.
	BOOL OpenImage(LPCTSTR lpszPathName);
	//Save image from indicated file.
	BOOL SaveImage(LPCTSTR lpszPathName);

	//Set cryptic version of the image file.
	//Save Bitmap to a file
	VOID SaveBitmap(CFile* pFile);		//*.bmp
	VOID SaveCrypticBmp(CFile* pFile);	//*.bmc
	//Get Bitmap from a file
	BOOL GetBitmap(CFile* pFile);
	BOOL GetCrypticBmp(CFile* pFile);
	//Get free image from a file. 
	//NOTE: format of free image
	//		word width
	//		word height
	//		byte ppData[height][width]
	BOOL GetFreeImage(CFile* pFile);	//*.fri
	BOOL GetCrypticFri(CFile* pFile);	//*.fic
	//Save free image to a file
	VOID SaveFreeImage(CFile* pFile, BOOL IsGray=TRUE);
	VOID SaveCrypticFri(CFile* pFile, BOOL IsGray=TRUE);
	//Save to file, support all type in list.
	VOID SaveToFile(CFile *pFile);
	//Open from file
	BOOL GetFromFile(CFile* pFile);
	
	////////////////////////////////////////////////
	//CDIBDC <--> other CDC//

	//Create compatible device context with pDC
	virtual BOOL CreateCompatibleDC(CDC* pDC);
	
	//Paste to pDC, like StrechDIBits(...)
	VOID Paste(CDC* pDC,
					 INT XDest, INT YDest, 
					 INT nDestWidth, INT nDestHeight, 
					 INT XSrc, INT YSrc, 
					 INT nSrcWidth, INT nSrcHeight, 
					 DWORD dwRop=SRCCOPY);
	VOID Paste(CDC* pDC,
					 INT XDest, INT YDest, 
					 INT nWidth, INT nHeight, 
					 INT XSrc, INT YSrc, 
					 DWORD dwRop=SRCCOPY);
	VOID Paste(CDC* pDC,
					 INT XDest, INT YDest, 
					 INT nDestWidth, INT nDestHeight, 
					 DWORD dwRop=SRCCOPY);
	VOID Paste(CDC* pDC,
					 INT XDest, INT YDest, 
					 DWORD dwRop=SRCCOPY);

	////////////////////////////////////////////////
	//SetColorTable//
	VOID SetDefaultColors(BOOL IsGray=TRUE);
	VOID SetColors(INT index, BYTE r, BYTE g, BYTE b);
	VOID SetColorTable(RGBQUAD* pColors);
	BOOL GetColorTable(RGBQUAD* pColors);
	
	//////////////////////////////////////////////////////
	//Attributes//

	LONG RowBytes();
	DWORD ColorTableSize();
	DWORD ImageSize();
	WORD& Bits();
	LONG& Height();
	LONG& Width();
};

#endif // !defined(THERE_IS_A_DIBDC_H_FILE)