--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/skins/AknSkins/rlplugininc/AknsRlEffectPluginContrast.h	Thu Dec 17 09:14:12 2009 +0200
@@ -0,0 +1,109 @@
+/*
+* Copyright (c) 2004-2008 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:  Provides functionality adjust image contrast.
+*
+*/
+
+
+#ifndef AKNSRLEFFECTPLUGINCONTRAST_H
+#define AKNSRLEFFECTPLUGINCONTRAST_H
+
+//  INCLUDES
+#include "AknsRlEffectPlugin.h"
+#include <AknsRlEffect.h>
+
+// CONSTANTS
+
+// Effect plugin UID
+const TInt KAknsRlEffectPluginContrastUID = 0x10204AE1;
+
+// Constants for parameter names
+_LIT( KAknsRlEffectContrastAdjustment, "a" );
+
+// CLASS DECLARATION
+
+/**
+* Contrast provides functionality adjust image contrast by blending the
+* original image with medium (127) gray image.
+*
+* @since 2.8
+*/
+NONSHARABLE_CLASS(CAknsRlEffectPluginContrast):
+    public CAknsRlEffectPlugin,
+    public MAknsRlEffect
+    {
+    public: // Constructors and destructor
+
+        /**
+        * Default constructor.
+        *
+        * @since 2.8
+        */
+        CAknsRlEffectPluginContrast();
+
+        /**
+        * Destructor.
+        *
+        * @since 2.8
+        */
+        virtual ~CAknsRlEffectPluginContrast();
+
+    public: // Implementation of CAknsEffectPlugin
+
+        TUid EffectUid() const;
+        MAknsRlEffect* Effect( const TInt aInterface );
+
+    public: // Implementation of MAknsRlEffect
+
+        void InitializeL();
+        void Release();
+
+        void ActivateL( MAknsRlEffectContext* aContext );
+        void Deactivate();
+
+        /**
+        * Accepted named parameters:
+        * - "a", integer, adjustment value.
+        *
+        * The normal range of adjustment value is [-255, 255]. Value -255
+        * produces medium gray image, value 255 produces fully contrasted
+        * image. Values outside range [-255, 255] will result in underexposure
+        * and overexposure.
+        *
+        * The default value is 0. With default value the filter produces the
+        * original image.
+        */
+        void SetParametersL( MAknsRlParameterIterator& aParameters );
+
+        /**
+        * Supported modes:
+        * - EColor64K -> EColor64K
+        * - EColor16MU -> EColor16MU
+        *
+        * Masks are ignored. Target layer and input layer A are both required.
+        */
+        void GetCapabilities( TAknsRlEffectCaps& aCaps );
+
+        TInt Render( const TAknsRlRenderOpParam& aParam );
+
+    private:
+
+        MAknsRlEffectContext* iContext;
+
+        TInt iAdjustment;
+    };
+
+#endif // AKNSRLEFFECTPLUGINCONTRAST_H
+
+// End of File