--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/skins/AknSkins/rlplugininc/AknsRlEffectPluginGrayscale.h	Thu Dec 17 09:14:12 2009 +0200
@@ -0,0 +1,127 @@
+/*
+* 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:  Grayscales images.
+*
+*/
+
+
+#ifndef AKNSRLEFFECTPLUGINGRAYSCALE_H
+#define AKNSRLEFFECTPLUGINGRAYSCALE_H
+
+//  INCLUDES
+#include "AknsRlEffectPlugin.h"
+#include <AknsRlEffect.h>
+
+// CONSTANTS
+
+// Effect plugin UID
+const TInt KAknsRlEffectPluginGrayscaleUID = 0x10204AE3;
+
+// Constants for parameter names
+_LIT( KAknsRlEffectGrayscaleGrayMin, "min" );
+_LIT( KAknsRlEffectGrayscaleGrayMax, "max" );
+
+_LIT( KAknsRlEffectGrayscaleBlendFactor, "f" );
+
+// CLASS DECLARATION
+
+/**
+* Grayscale provides functionality to grayscaling images.
+*
+* @since 2.8
+*/
+NONSHARABLE_CLASS(CAknsRlEffectPluginGrayscale):
+    public CAknsRlEffectPlugin,
+    public MAknsRlEffect
+    {
+    public: // Constructors and destructor
+
+        /**
+        * Default constructor.
+        *
+        * @since 2.8
+        */
+        CAknsRlEffectPluginGrayscale();
+
+        /**
+        * Destructor.
+        *
+        * @since 2.8
+        */
+        virtual ~CAknsRlEffectPluginGrayscale();
+
+    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:
+        * - "min", integer, lower end of the scale range
+        * - "max", integer, higher end of the scale range
+        * - "f", integer, normal range [0, 255], blend factor.
+        *
+        * Min and Max:
+        * The resulting gray shades will be scaled into range [min, max].  The
+        * normal range for min and max is [0, 255] but values outside the range
+        * work as expected. Warning: min > max will cause a leave.
+        *
+        * Blend factor:
+        * Blend factor controls the resulting opacity of the applied effect.
+        * Normal value range is [0, 255] but values outside will also work.
+        * - Value 0 will result in the original image.
+        * - Value 255 will result in the filtered image.
+        * - Values outside range [0, 255] will result in underexposure or
+        *   overexposure.
+        *
+        * The default parameter values are:
+        * - "min" = 0
+        * - "max" = 255
+        * - "f" = 255, full filter opacity
+        */
+        void SetParametersL( MAknsRlParameterIterator& aParameters );
+
+        /**
+        * Supported modes:
+        * - EColor64K -> EColor64K
+        * - EColor16MU -> EColor16MU
+        * - EColor64K -> EGray256
+        * - EColor16MU -> EGray256
+        *
+        * 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 iGrayMin;
+        TInt iGrayMax;
+        TInt iBlendFactor;
+    };
+
+#endif // AKNSRLEFFECTPLUGINGRAYSCALE_H
+
+// End of File