diff -r 000000000000 -r 05e9090e2422 skins/AknSkins/rlpluginsrc/AknsRlEffectPluginContrast.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/skins/AknSkins/rlpluginsrc/AknsRlEffectPluginContrast.cpp	Thu Dec 17 09:14:12 2009 +0200
@@ -0,0 +1,268 @@
+/*
+* 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.
+*
+*/
+
+
+// INCLUDE FILES
+#include "AknsRlEffectPluginContrast.h"
+#include "AknsRlEffectUtil.h"
+#include "fx_asm_versions.h"
+
+// ================ TEMPLATE IMPL. OF CONTRAST =================================
+/**
+* Template implementation of Contrast. Type defines the used data type for
+* iterating over the bitmap data. X, R, G and B define the used pixel color bit
+* layout.
+*/
+template<class Type,TInt X, TInt R, TInt G, TInt B>
+class AknsRlEffectContrast
+    {
+    public:
+    //------------------------------------------------------------------------
+    static void Process( const CFbsBitmap& aTarget,
+                         const CFbsBitmap& aSource,
+                         const TInt aAdjustment )
+        {
+        // ScanLineLength returns bytes, but width must match the Type
+        TInt width  = CFbsBitmap::ScanLineLength( aSource.SizeInPixels().iWidth,
+                                                  aSource.DisplayMode() ) / sizeof(Type);
+        TInt height = aSource.SizeInPixels().iHeight;
+
+        TInt pixelCount = width * height;
+        TInt r,g,b;
+
+        aTarget.LockHeap( ETrue ); // Lock the global bitmap buffer
+        Type* dataT = reinterpret_cast<Type*>( aTarget.DataAddress() );
+        Type* dataS = reinterpret_cast<Type*>( aSource.DataAddress() );
+
+        for( TInt index = 0; index < pixelCount; ++index )
+            {
+            // Contrast is simple, blend with middle gray (127)
+            // Note: It is assumed that arithmetic shifting is supported
+            // -> negative values are shifted correctly
+            r = (AknsRlRgb<Type,X,R,G,B>::R8(*dataS) * (255 + aAdjustment) - aAdjustment * 127) >> 8;
+            g = (AknsRlRgb<Type,X,R,G,B>::G8(*dataS) * (255 + aAdjustment) - aAdjustment * 127) >> 8;
+            b = (AknsRlRgb<Type,X,R,G,B>::B8(*dataS) * (255 + aAdjustment) - aAdjustment * 127) >> 8;
+
+            if( r < 0 ) r = 0; else if( r > 255 ) r = 255;
+            if( g < 0 ) g = 0; else if( g > 255 ) g = 255;
+            if( b < 0 ) b = 0; else if( b > 255 ) b = 255;
+
+            AknsRlRgb<Type,X,R,G,B>::SetRgb8( dataT, TUint8(r), TUint8(g), TUint8(b) );
+
+            dataT++;
+            dataS++;
+            }
+
+        aTarget.UnlockHeap( ETrue );
+        }
+    }; // End of AknsRlEffectContrast
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::CAknsRlEffectPluginContrast
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CAknsRlEffectPluginContrast::CAknsRlEffectPluginContrast()
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// Destructor
+// -----------------------------------------------------------------------------
+//
+CAknsRlEffectPluginContrast::~CAknsRlEffectPluginContrast()
+    {
+    iContext = NULL; // Removes lint nag
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::EffectUid
+// -----------------------------------------------------------------------------
+//
+TUid CAknsRlEffectPluginContrast::EffectUid() const
+    {
+    return TUid::Uid( KAknsRlEffectPluginContrastUID );
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::Effect
+// -----------------------------------------------------------------------------
+//
+MAknsRlEffect* CAknsRlEffectPluginContrast::Effect( const TInt aInterface )
+    {
+    if( aInterface == KAknsRlEffectPluginInterfaceEffect )
+        return this;
+    return NULL;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::InitializeL
+// -----------------------------------------------------------------------------
+//
+void CAknsRlEffectPluginContrast::InitializeL()
+    {
+    iContext = NULL;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::Release
+// -----------------------------------------------------------------------------
+//
+void CAknsRlEffectPluginContrast::Release()
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::ActivateL
+// -----------------------------------------------------------------------------
+//
+void CAknsRlEffectPluginContrast::ActivateL( MAknsRlEffectContext* aContext )
+    {
+    if( !aContext ) // We absolutely need the context
+        {
+        User::Leave( KErrArgument );
+        }
+
+    iContext = aContext;
+
+    iAdjustment = 0;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::Deactivate
+// -----------------------------------------------------------------------------
+//
+void CAknsRlEffectPluginContrast::Deactivate()
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::SetParametersL
+// -----------------------------------------------------------------------------
+//
+void CAknsRlEffectPluginContrast::SetParametersL( MAknsRlParameterIterator& aParameters )
+    {
+    // Iterate over available parameters
+    while( aParameters.HasNext() )
+        {
+        const TAknsRlParameterData* param = aParameters.NextL();
+
+        // Fetch adjustment value
+        if( param->iName->Compare( KAknsRlEffectContrastAdjustment ) == 0 )
+            {
+            if( param->iType != EAknsRlParameterTypeNumber )
+                User::Leave( KErrArgument );
+
+            iAdjustment = param->iNumber;
+            }
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::GetCapabilities
+// -----------------------------------------------------------------------------
+//
+void CAknsRlEffectPluginContrast::GetCapabilities( TAknsRlEffectCaps& aCaps )
+    {
+    aCaps.iOutputLayerSupport = KAknsRlLayerRGBOnly;
+    aCaps.iInputLayerASupport = KAknsRlLayerRGBOnly;
+    aCaps.iInputLayerBSupport = KAknsRlLayerNone;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsRlEffectPluginContrast::Render
+// -----------------------------------------------------------------------------
+//
+TInt CAknsRlEffectPluginContrast::Render( const TAknsRlRenderOpParam& aParam )
+    {
+    if( !iContext ) // We absolutely need the context
+        {
+        return KErrBadHandle;
+        }
+
+    // To do anything we need both, the output layer and input layer
+    if( ( aParam.iOutputLayerStatus & KAknsRlLayerRGBOnly ) &&
+        ( aParam.iInputLayerAStatus & KAknsRlLayerRGBOnly ) )
+        {
+        // Query the layers, uninitialized because we process the whole image
+        TAknsRlLayerData dataTarget;
+        TRAPD( err, iContext->GetLayerDataL( dataTarget, aParam.iOutputLayerIndex,
+                                             aParam.iOutputLayerStatus, EFalse ) );
+        if( KErrNone != err )
+            return KErrArgument;
+
+        TAknsRlLayerData dataSource;
+        TRAP( err, iContext->GetLayerDataL( dataSource, aParam.iInputLayerAIndex,
+                                            aParam.iInputLayerAStatus, EFalse ) );
+        if( KErrNone != err )
+            return KErrArgument;
+
+        if( !dataTarget.iRGBBitmap ) // We need the target bitmap
+            return KErrBadHandle;
+
+        if( !dataSource.iRGBBitmap ) // We need the source bitmap
+            return KErrBadHandle;
+
+        TDisplayMode modeT = dataTarget.iRGBBitmap->DisplayMode();
+        TDisplayMode modeS = dataSource.iRGBBitmap->DisplayMode();
+
+#ifndef ARM_VERSION // winscw
+        // Process the filter
+        if( EColor64K == modeS && EColor64K == modeT )
+            {
+            AknsRlEffectContrast<TUint16,0,5,6,5>::Process(
+                            *dataTarget.iRGBBitmap,
+                            *dataSource.iRGBBitmap,
+                            iAdjustment );
+            }
+        else if( EColor16MU == modeS && EColor16MU == modeT )
+            {
+            AknsRlEffectContrast<TUint32,8,8,8,8>::Process(
+                            *dataTarget.iRGBBitmap,
+                            *dataSource.iRGBBitmap,
+                            iAdjustment );
+            }
+#else // ARM
+        // Process the filter
+        if( (EColor64K == modeS && EColor64K == modeT) ||
+            (EColor16MU == modeS && EColor16MU == modeT) )
+            {
+            AProcessContrast(*dataTarget.iRGBBitmap,
+                             *dataSource.iRGBBitmap,
+                             iAdjustment,
+                             modeS );
+            }
+#endif
+        else
+            {
+            // Provided layers have illegal display mode combination
+            return KErrArgument;
+            }
+        }
+    else
+        {
+        // Required layers were not provided
+        return KErrArgument;
+        }
+
+    return KErrNone;
+    }
+
+// End of File