www.pudn.com > VisSDK.rar > ExGrabBmp.cpp

// ExGrabBmp.cpp 
// 
// Copyright © 1997-2000 Microsoft Corporation, All Rights Reserved 
 
 
#include "VisWin.h" 
 
#include "VisImSrc.h" 
#include "VisMemoryChecks.h" 
 
 
 
#ifdef VIS_SDK_LIBS 
	// If VIS_SDK_LIBS is defined, we can include "VisVFWCameraLib.h" to 
	// link with the VisVFWCamera code (so that the DLL is not needed). 
	#include "VisVFWCameraLib.h" 
#endif // VIS_SDK_LIBS 
 
 
main(int cArg, char *rgszArg[]) 
{ 
	std::string strFile; 
	if (cArg > 1) 
	{ 
		// Check to see if we should print usage information. 
		if ((rgszArg[1][0] == '-') || (rgszArg[1][0] == '/')) 
		{ 
			printf("\nUsage:  %s  [ filename ]\n", rgszArg[0]); 
			return 0; 
		} 
 
		// Otherwise, use the first argument as the filename. 
		strFile = rgszArg[1]; 
 
		// If no extension is given, use ".bmp". 
		if (strchr(strFile.c_str(), '.') == 0) 
			strFile += ".bmp"; 
	} 
	else 
	{ 
		strFile = rgszArg[0]; 
		int cchFile = strFile.size(); 
		assert(cchFile > 4); 
		if (stricmp(strFile.c_str() + cchFile - 4, ".exe") == 0) 
		{ 
			strFile[cchFile - 3] = 'b'; 
			strFile[cchFile - 2] = 'm'; 
			strFile[cchFile - 1] = 'p'; 
		} 
		else 
		{ 
			strFile += ".bmp"; 
		} 
	} 
 
	VisAddProviderRegEntryForVFW(); 
 
	// Use an empty string when finding the image source so that we 
	// don't attempt to display an MFC dialog to the user. 
	CVisImageSource imagesource = VisFindImageSource(""); 
 
	if (imagesource.IsValid()) 
	{ 
		imagesource.SetUseContinuousGrab(false); 
		CVisSequence sequence; 
		sequence.ConnectToSource(imagesource, true, false); 
 
		CVisRGBAByteImage imageT; 
		if (sequence.Pop(imageT, 2000)) 
		{ 
			imageT.FWriteFile(strFile.c_str()); 
		} 
 
		sequence.DisconnectFromSource(); 
	} 
 
	return 0; 
}