--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imageeditorengine/filters/FilterContrast/Src/CFilterContrast.cpp	Fri Jan 29 13:53:17 2010 +0200
@@ -0,0 +1,195 @@
+/*
+* 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 <e32math.h>
+#include "CFilterContrast.h"
+
+EXPORT_C TInt CFilterContrast::Create()
+	{
+	CFilterContrast* ptr = NULL;
+	TRAPD( error, ptr = NewL(); );
+	if( error != KErrNone )
+		{
+		ptr = NULL;
+		}
+	return (TInt)((MImageFilter*)ptr);
+	}
+
+
+
+CFilterContrast* CFilterContrast::NewL()
+	{
+	CFilterContrast* self = new( ELeave )CFilterContrast();
+	CleanupStack::PushL( self );
+	self->ConstructL();
+	CleanupStack::Pop( self );
+	return self;
+	}
+
+
+
+CFilterContrast::~CFilterContrast()
+	{
+	}
+
+
+
+CFilterContrast::CFilterContrast()
+	{
+
+	}
+
+
+
+void CFilterContrast::ConstructL()
+	{
+	ComputeContrastStretchL();
+	}
+
+
+
+TRect CFilterContrast::Rect()
+	{
+	return iChild->Rect();
+	}
+
+TReal CFilterContrast::Scale()
+	{
+	return iChild->Scale();
+	}
+
+TSize CFilterContrast::ViewPortSize()
+{
+    return iChild->ViewPortSize();
+}
+
+
+TBlock * CFilterContrast::GetBlockL ( const TRect & aRect )
+{
+    TBlock * pB = iChild->GetBlockL (aRect);
+    if (!pB) return NULL;
+    TUint32 * pD = pB->iData;
+    for (TInt i = 0; i < pB->iDataLength; ++i)
+    {
+        TUint32 c = *pD;
+        TUint8 b = iLUT[c & 0xFF];
+	    c >>= 8;
+	    TUint8 g = iLUT[c & 0xFF];
+        c >>= 8;
+	    TUint8 r = iLUT[c & 0xFF];
+        *pD++ = 0 | b | (g << 8) | (r << 16);
+    }
+    return pB;
+}
+
+
+
+void CFilterContrast::SetParent( MImageFilter* aParent )
+	{
+	iParent = aParent;
+	}
+
+
+
+
+void CFilterContrast::SetChild( MImageFilter* aChild )
+	{
+	iChild = aChild;
+	}
+
+
+
+TInt CFilterContrast::CmdL( const TDesC16& aCmd )
+{
+
+	TLex lex (aCmd);
+
+	while ( ! lex.Eos() )
+    {
+		TPtrC token = lex.NextToken();
+
+        if ( token.Compare( _L("contrast") ) == 0)
+        {
+
+		    lex.Inc();
+		    lex.Val (iContrast);
+
+	        //	Check parameter
+	        if ( iContrast < -100)
+	        {
+		        iContrast = -100;
+	        }
+	        else if ( iContrast > 100)
+	        {
+		        iContrast = 100;
+	        }
+            ComputeContrastStretchL();
+		}
+    }
+    return 0;
+}
+
+const char* CFilterContrast::Type()
+	{
+	return "contrast";
+	}
+
+void CFilterContrast::ComputeContrastStretchL()
+	{
+        //  Compute luminance histogram, if not computed
+	    if ( iContrast >= 0 )
+	    {
+		    TInt val_low = (iContrast * 127) / 100;
+		    TInt val_high = 255 - val_low;
+		    TInt range = val_high - val_low + 1;
+
+		    TInt i = 0;
+		    for ( ; i <= val_low; i++)
+		    {
+			    iLUT[i] = 0;
+		    }
+		    for ( ; i < val_high; ++i)
+		    {
+			    iLUT[i] = (TUint8)(((i - val_low) * 255) / range);
+		    }
+		    for ( ; i <= 255; i++)
+		    {
+			    iLUT[i] = 255;
+		    }
+	    }
+	    else
+	    {
+
+		    TInt val_low = (-iContrast * 127) / 100;
+		    TInt val_high = 255 - val_low;
+		    TInt range = val_high - val_low + 1;
+
+		    for ( TInt i = 0; i <= 255; i++ )
+		    {
+			    iLUT[i] = (TUint8)(val_low + (i * range) / 255);
+		    }
+	    }
+	}
+
+#if !defined(EKA2)
+GLDEF_C TInt E32Dll( TDllReason )
+    {
+    return KErrNone;
+    }	
+#endif