diff -r 57d4cdd99204 -r edfc90759b9f imageeditorengine/src/CFilterStack.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imageeditorengine/src/CFilterStack.cpp	Fri Jan 29 13:53:17 2010 +0200
@@ -0,0 +1,268 @@
+/*
+* Copyright (c) 2010 Ixonos Plc.
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the "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:
+* Ixonos Plc
+*
+* Description:  
+*
+*/
+
+
+#include "CFilterStack.h"
+#include <f32file.h>
+
+//  Debug logger definitions
+#include "imageeditordebugutils.h"
+_LIT(KMIAWrapperLogFile,"EngineWrapper.log");
+
+CFilterStack* CFilterStack::NewL()
+	{
+	CFilterStack* self = new( ELeave )CFilterStack();
+	CleanupStack::PushL( self );
+	self->ConstructL();
+	CleanupStack::Pop( self );
+	return self;
+	}
+
+
+
+CFilterStack::~CFilterStack()
+	{
+	iStack.ResetAndDestroy();
+	}
+
+
+
+CFilterStack::CFilterStack()
+	{
+
+	}
+
+
+
+void CFilterStack::ConstructL()
+	{
+	/*
+	TFileName fileName( _L("c:\\filterscript.txt") );
+
+	RFs fs;
+	User::LeaveIfError( fs.Connect() );
+	CleanupClosePushL( fs );
+
+	RFile file;
+	User::LeaveIfError( file.Open( fs, fileName, EFileRead ) );
+	CleanupClosePushL( file );
+
+	TInt l = 0;
+	file.Size( l );
+	TUint8* t = new TUint8[ l ];
+	CleanupStack::PushL( t );
+	TPtr8 txt8o( t, l );
+	User::LeaveIfError( file.Read( txt8o ) );
+	TPtrC8 txt8( txt8o );
+	TInt strl = txt8.Find( _L8(" ") );
+
+	while( strl > 0 )
+		{
+		TPtrC8 filterName( txt8.Ptr(), strl );
+		txt8.Set( txt8.Mid( strl+1 ) );
+		
+		strl = txt8.Find( _L8("\r") );
+		TPtrC8 filterParam( txt8.Ptr(), strl );
+		txt8.Set( txt8.Mid( strl+1 ) );
+
+		if( txt8.Length() > 0 )
+			{
+			if( txt8[ 0 ] == '\n' )
+				{
+				txt8.Set( txt8.Mid( 1 ) );
+				}
+			}
+
+		strl = txt8.Find( _L8(" ") );
+
+		TFilter* f = new( ELeave )TFilter;
+		TInt error = KErrNone;
+
+		if( filterName.Compare( _L8("jpegsource") ) == 0 )
+			{
+			error = f->iLibrary.Load( _L("FilterJpegSource.dll" ) );
+			}
+		else if( filterName.Compare( _L8("jpegtarget") ) == 0 )
+			{
+			error = f->iLibrary.Load( _L("FilterJpegTarget.dll" ) );
+			}
+		else if( filterName.Compare( _L8("negate") ) == 0 )
+			{
+			error = f->iLibrary.Load( _L("FilterNegate.dll" ) );
+			}
+		else if( filterName.Compare( _L8("buffer") ) == 0 )
+			{
+			error = f->iLibrary.Load( _L("FilterBuffer.dll" ) );
+			}
+		
+		User::LeaveIfError( error );
+
+		MImageFilter*& filter = f->iFilter;
+		filter = (MImageFilter*)(f->iLibrary.Lookup( 1 )());
+		
+		if( filter == NULL )
+			{
+			delete f;
+			User::Panic( _L("Could not load filter"), 0 );
+			}
+		
+		f->iFilter = filter;
+		iStack.Append( f );
+		InitStack();
+		TBuf< 100 > cmd16;
+		cmd16.Copy( filterParam );
+		filter->CmdL( cmd16 );
+		}
+	
+	
+	CleanupStack::PopAndDestroy( 3 ); // t, file, fs
+	*/
+	}
+
+
+
+void CFilterStack::InitStack()
+	{
+	TInt c = iStack.Count();
+	TInt i;
+	for( i=0; i<c; i++ )
+		{
+		TInt childn = i-1;
+		TInt parentn = i+1;
+		if( childn >= 0 )
+			{
+			iStack[ i ]->iFilter->SetChild( iStack[ childn ]->iFilter );
+			}
+		if( parentn < c )
+			{
+			iStack[ i ]->iFilter->SetParent( iStack[ parentn ]->iFilter );
+			}
+		}
+	}
+
+
+
+MImageFilter* CFilterStack::Filter( TInt aPosition )
+	{
+	return iStack[ aPosition ]->iFilter;
+	}
+
+
+
+void CFilterStack::AddFilterL( const TDesC& aName )
+	{
+	AddFilterL( aName, iStack.Count() );
+	}
+
+
+
+void CFilterStack::AddFilterL( const TDesC& aName, TInt aPosition )
+	{
+	LOG ( KMIAWrapperLogFile, "CFilterStack::AddFilterL" );
+
+	TFilter* f = new( ELeave )TFilter;
+	CleanupStack::PushL(f);
+	
+	LOG ( KMIAWrapperLogFile, "CFilterStack::AddFilterL: Loading" );
+	User::LeaveIfError( f->iLibrary.Load( aName ) );
+	MImageFilter*& filter = f->iFilter;
+
+	LOG ( KMIAWrapperLogFile, "CFilterStack::AddFilterL: Lookup" );
+	filter = (MImageFilter*)(f->iLibrary.Lookup( 1 )());
+	if( filter == NULL )
+		{
+		LOG ( KMIAWrapperLogFile, "CFilterStack::AddFilterL: Filter null" );
+		f->iLibrary.Close();
+		User::Leave( KErrNoMemory );
+		}
+	f->iFilter = filter;
+
+	if( iStack.Count() == aPosition )
+		{
+		iStack.Append( f );
+		}
+	else
+		{
+		/*
+		iStack.Append( 0 );
+
+		TInt s = aPosition;
+		TInt e = iStack.Count()-2;
+		TInt i;
+		for( i=s; i<e; i++ )
+			{
+			iStack[ i+1 ] = iStack[ i ];
+			}
+			*/
+		iStack.Insert( f, aPosition );
+		}
+	CleanupStack::Pop();
+	LOG ( KMIAWrapperLogFile, "CFilterStack::AddFilterL: Initializing stack" );
+		
+	InitStack();
+	}
+
+void CFilterStack::AddFilterL( const TFilter * aFilter )
+{
+	AddFilterL( aFilter, iStack.Count() );
+}
+
+void CFilterStack::AddFilterL( const TFilter * aFilter, const TInt aPosition )
+{
+	LOG ( KMIAWrapperLogFile, "CFilterStack::AddFilterL" );
+	if ( iStack.Count() == aPosition )
+	{
+		iStack.Append( aFilter );
+	}
+	else
+	{
+		iStack.Insert( aFilter, aPosition );
+	}
+
+	LOG ( KMIAWrapperLogFile, "CFilterStack::AddFilterL: Initializing stack" );
+		
+	InitStack();
+}
+
+
+void CFilterStack::RemoveFilter( TInt aPosition )
+	{
+	delete iStack[ aPosition ];
+	iStack.Remove( aPosition );
+	InitStack();
+	}
+
+void CFilterStack::RemoveFilter ( TInt aPosition, TFilter *& aFilter )
+{
+	aFilter = iStack[aPosition];
+	iStack.Remove( aPosition );
+	InitStack();
+}
+
+TInt CFilterStack::FunctionL( TInt aPosition, const TDesC& aCmd )
+	{
+	return iStack[ aPosition ]->iFilter->CmdL( aCmd );
+	}
+
+
+
+
+TInt CFilterStack::NumFilters()
+	{
+	return iStack.Count();
+	}