// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

 // All rights reserved.

 // This component and the accompanying materials are made available

 // under the terms of "Eclipse Public License v1.0"

 // which accompanies this distribution, and is available

 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

 //

 // Initial Contributors:

 // Nokia Corporation - initial contribution.

 //

 // Contributors:

 //

 // Description:

 // For the Winscw Emulator only, selects between NGA and Non-NGA version of wsgraphicdrawer.

 // The default is the non-GCE based version.

 // To select the NGA version do one of:

 // 1. Add a line to the epoc.ini file in \epoc32\data like this:

 // symbian_graphics_use_gce ON

 // or

 // 2. Start epoc.exe with these parameters, (the "--" IS necessary):

 // -Dsymbian_graphics_use_gce=ON --

 // or

 // 3. epoc.exe can be told to switch to a different initialisation file than epoc.ini, with the -M parameter.

 // Progress chaining to the real Wserv is logged in epocwind.out.

 // 

 //

 #include <e32svr.h>

 #include <u32hal.h>

 _LIT(KProcessName, "WservSwitch");

 TInt ChainWservSwitch()

 	{

 	_LIT(KWservSwitchNga,"z:\\sys\\bin\\wserv_nga.exe");

 	_LIT(KWservSwitchNonNga,"z:\\sys\\bin\\wserv_nonnga.exe");

 	// need to forward the command parameters to the chained version of Wserv

 	TInt argLen = User::CommandLineLength();

 	HBufC* arg = HBufC::New(argLen);

 	if (arg == NULL)

 		{

 		return KErrNoMemory;

 		}

 	TPtr argPtr = arg->Des();

 	User::CommandLine(argPtr);

 	// NGA or Non-NGA WServ version?

 	TBool nga = EFalse;

 	UserSvr::HalFunction(EHalGroupEmulator, EEmulatorHalBoolProperty,  (TAny*)"symbian_graphics_use_gce",  &nga);

 	// try to launch it

 	const TPtrC exeName = nga ?  KWservSwitchNga() : KWservSwitchNonNga();

 #ifdef _DEBUG

 	RDebug::Print(_L("%S: Starting \"%S\" \"%S\""), &KProcessName, &exeName, &argPtr);

 #endif

 	RProcess server;

 	TInt err = server.Create(exeName, argPtr, EOwnerThread);

 	delete arg;

 	arg = NULL;

 	if (err)

 		{

 		return err;

 		}

 	// wait for server to start

 #ifdef _DEBUG

 	RDebug::Print(_L("%S: waiting on process ..."), &KProcessName);

 #endif

 	TRequestStatus stat;

 	server.Rendezvous(stat);

 	if (stat!=KRequestPending)

 		{ // abort startup

 		server.Kill(0);

 		}

 	else

 		{ // logon OK - start the server

 		server.Resume();

 		}

 	User::WaitForRequest(stat);

 	return (server.ExitType() == EExitPanic) ? KErrGeneral : stat.Int();

 	}

 TInt E32Main()

 	{

 	TInt error = ChainWservSwitch();

 	// propagate error to SysStart

 	if (error)

 		{

 #ifdef _DEBUG

 		RDebug::Print(_L("%S: Failed with error %i"), &KProcessName, error);

 #endif

 		}

 	RProcess::Rendezvous(error);

 	return error;

 	}