--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/windowing/windowserver/wins_switching/wservswitch.cpp	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,95 @@
+// 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();
+	RDebug::Print(_L("%S: Starting \"%S\" \"%S\""), &KProcessName, &exeName, &argPtr);
+	RProcess server;
+	TInt err = server.Create(exeName, argPtr, EOwnerThread);
+	delete arg;
+	arg = NULL;
+	if (err)
+		{
+		return err;
+		}
+
+	// wait for server to start
+	RDebug::Print(_L("%S: waiting on process ..."), &KProcessName);
+	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)
+		{
+		RDebug::Print(_L("%S: Failed with error %i"), &KProcessName, error);
+		}
+	RProcess::Rendezvous(error);
+	return error;
+	}
+