纯SDK方式截屏并且保存为BMP格式 .

末蓝、 2022-06-17 00:47 175阅读 0赞

网上MFC例子不少.在写一个BHO的时候好多都不可以用了 以下是纯SDK方式写的

函数名称可见函数功能

//截图代码
    void Screenshots()
    {
    	HBITMAP	hDesktopCompatibleBitmap=NULL;
    	HDC		hDesktopCompatibleDC=NULL;
    	HDC		hDesktopDC=NULL;
    	HWND		hDesktopWnd=NULL;
    	RECT		clientRect = {0,0,0,0};
    	NOTIFYICONDATA	nid;
    
    	bool bMinimized=false;
    
    	int wmId, wmEvent;
    	PAINTSTRUCT ps;
    	HDC hdc;
    
    	OPENFILENAME	ofn;
    	char	szFileName[512]; 
    
    	strcpy(szFileName,"J://ScreenShot.bmp");
    
    	ZeroMemory(&ofn,sizeof(ofn));
    	ofn.lStructSize=sizeof(OPENFILENAME);
    	ofn.Flags=OFN_HIDEREADONLY|OFN_PATHMUSTEXIST;
    	ofn.lpstrFilter="Bitmap Files (*.bmp)/0*.bmp/0";
    	ofn.lpstrDefExt="bmp";
    	ofn.lpstrFile=szFileName;
    	ofn.nMaxFile=512;
    //	ofn.hwndOwner = hWnd;
    // 	if(!GetSaveFileName(&ofn))	
    // 		return;
    
    	SetCursor(LoadCursor(NULL,IDC_WAIT));	
    	int		nWidth=GetSystemMetrics(SM_CXSCREEN);
    	int		nHeight=GetSystemMetrics(SM_CYSCREEN);
    
    	hDesktopDC = CreateDC("DISPLAY", NULL, NULL, NULL); 
    	HDC		hBmpFileDC=CreateCompatibleDC(hDesktopDC);
    	HBITMAP	hBmpFileBitmap=CreateCompatibleBitmap(hDesktopDC,nWidth,nHeight);
    	HBITMAP hOldBitmap = (HBITMAP) SelectObject(hBmpFileDC,hBmpFileBitmap);
    	BitBlt(hBmpFileDC,0,0,nWidth,nHeight,hDesktopDC,0,0,SRCCOPY|CAPTUREBLT);
    	SelectObject(hBmpFileDC,hOldBitmap);
    
    	SaveBitmap(ofn.lpstrFile,hBmpFileBitmap);
    
    	DeleteDC(hBmpFileDC);
    	DeleteObject(hBmpFileBitmap);
    	SetCursor(LoadCursor(NULL,IDC_ARROW));
    
    }
    
    //将内存中位图写为Bmp格式
    //szFile为目标地址
    void	SaveBitmap(char *szFilename,HBITMAP hBitmap)
    {
    	HDC					hdc=NULL;
    	FILE*				fp=NULL;
    	LPVOID				pBuf=NULL;
    	BITMAPINFO			bmpInfo;
    	BITMAPFILEHEADER	bmpFileHeader;
    	
    	do{
    		
    		hdc=GetDC(NULL);
    		ZeroMemory(&bmpInfo,sizeof(BITMAPINFO));
    		bmpInfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
    		GetDIBits(hdc,hBitmap,0,0,NULL,&bmpInfo,DIB_RGB_COLORS);
    		
    		if(bmpInfo.bmiHeader.biSizeImage<=0)
    			bmpInfo.bmiHeader.biSizeImage=bmpInfo.bmiHeader.biWidth*abs(bmpInfo.bmiHeader.biHeight)*(bmpInfo.bmiHeader.biBitCount+7)/8;
    		
    		if((pBuf=malloc(bmpInfo.bmiHeader.biSizeImage))==NULL)
    		{
    //			MessageBox(NULL,_T("Unable to Allocate Bitmap Memory"),_T("Error"),MB_OK|MB_ICONERROR);
    			break;
    		}
    		
    		bmpInfo.bmiHeader.biCompression=BI_RGB;
    		GetDIBits(hdc,hBitmap,0,bmpInfo.bmiHeader.biHeight,pBuf,&bmpInfo,DIB_RGB_COLORS);	
    		
    		if((fp=fopen(szFilename,"wb"))==NULL)
    		{
    		//	MessageBox(NULL,_T("Unable to Create Bitmap File"),_T("Error"),MB_OK|MB_ICONERROR);
    			break;
    		}
    		
    		bmpFileHeader.bfReserved1=0;
    		bmpFileHeader.bfReserved2=0;
    		bmpFileHeader.bfSize=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+bmpInfo.bmiHeader.biSizeImage;
    		bmpFileHeader.bfType='MB';
    		bmpFileHeader.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);
    		
    		fwrite(&bmpFileHeader,sizeof(BITMAPFILEHEADER),1,fp);
    		fwrite(&bmpInfo.bmiHeader,sizeof(BITMAPINFOHEADER),1,fp);
    		fwrite(pBuf,bmpInfo.bmiHeader.biSizeImage,1,fp);
    		
    	}while(false);
    	
    	if(hdc)
    		ReleaseDC(NULL,hdc);
    	
    	if(pBuf)
    		free(pBuf);
    	
    	if(fp)
    		fclose(fp);
    }