--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/skins/AknSkins/alsrc/AknsAlEffectContext.cpp	Thu Dec 17 09:14:12 2009 +0200
@@ -0,0 +1,311 @@
+/*
+* 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:  Class for providing effect context for effect plugins.
+*
+*/
+
+
+// INCLUDE FILES
+#include "AknsRlErr.h"
+#include "AknsAlEffectContext.h"
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::CAknsAlEffectContext
+// -----------------------------------------------------------------------------
+//
+CAknsAlEffectContext::CAknsAlEffectContext()
+    {
+    // Derived from CBase -> all data is zeroed
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::NewL
+// -----------------------------------------------------------------------------
+//
+CAknsAlEffectContext* CAknsAlEffectContext::NewL()
+    {
+    CAknsAlEffectContext* self = new(ELeave) CAknsAlEffectContext();
+    return self;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::~CAknsAlEffectContext
+// -----------------------------------------------------------------------------
+//
+CAknsAlEffectContext::~CAknsAlEffectContext()
+    {
+    ReleaseLayers(); //lint !e1551 No exception thrown
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::ConfigureL
+// -----------------------------------------------------------------------------
+//
+void CAknsAlEffectContext::ConfigureL( const TSize& aSize,
+                                       TDisplayMode aRgbMode,
+                                       TInt aInputLayerIndex,
+                                       TInt aInputLayerMode )
+    {
+    iLayerSize = aSize;
+    iRgbMode = aRgbMode;
+
+    ReleaseLayers();
+
+    if( aInputLayerIndex < 0 ) // Input layer is set to none
+        {
+        return;
+        }
+
+    CreateIfNeededL( aInputLayerIndex, aInputLayerMode, ETrue );
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::RgbBitmap
+// -----------------------------------------------------------------------------
+//
+CFbsBitmap* CAknsAlEffectContext::RgbBitmap( TInt aLayerIndex ) const
+    {
+    if( aLayerIndex < 0 || aLayerIndex >= KAknsAlEffectContextLayerN )
+        return NULL;
+
+    return iLayers[aLayerIndex].iRGBBitmap;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::AlphaBitmap
+// -----------------------------------------------------------------------------
+//
+CFbsBitmap* CAknsAlEffectContext::AlphaBitmap( TInt aLayerIndex ) const
+    {
+    if( aLayerIndex < 0 || aLayerIndex >= KAknsAlEffectContextLayerN )
+        return NULL;
+
+    return iLayers[aLayerIndex].iAlphaBitmap;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::RgbGc
+// -----------------------------------------------------------------------------
+//
+CFbsBitGc* CAknsAlEffectContext::RgbGc( TInt aIndex ) const
+    {
+    if( aIndex < 0 || aIndex >= KAknsAlEffectContextLayerN )
+        return NULL;
+
+    return iLayers[aIndex].iRGBGc;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::AlphaGc
+// -----------------------------------------------------------------------------
+//
+CFbsBitGc* CAknsAlEffectContext::AlphaGc( TInt aIndex ) const
+    {
+    if( aIndex < 0 || aIndex >= KAknsAlEffectContextLayerN )
+        return NULL;
+
+    return iLayers[aIndex].iAlphaGc;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::ReleaseInputLayers
+// -----------------------------------------------------------------------------
+//
+void CAknsAlEffectContext::ReleaseInputLayers( TInt aOutputLayerIndex )
+    {
+    // It is possible that output layer is also one of the input layers ->
+    // delete all layers that are not output layer.
+    for( int i=0; i < KAknsAlEffectContextLayerN; i++ )
+        {
+        if( i != aOutputLayerIndex )
+            {
+            ReleaseLayer( i );
+            }
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::SetSkinSrvSession
+// -----------------------------------------------------------------------------
+//
+void CAknsAlEffectContext::SetSkinSrvSession( RAknsSrvSession* aSession )
+    {
+    iSession = aSession;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::LayerSize
+// -----------------------------------------------------------------------------
+//
+const TSize CAknsAlEffectContext::LayerSize()
+    {
+    return iLayerSize;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::GetLayerDataL
+// -----------------------------------------------------------------------------
+//
+void CAknsAlEffectContext::GetLayerDataL( TAknsRlLayerData& aData,
+                                          const TInt aLayerIndex,
+                                          const TInt aLayerStatus,
+                                          const TBool aInitialize )
+    {
+    if( ( aLayerIndex < 0 ) || ( aLayerIndex >= KAknsAlEffectContextLayerN ) )
+        {
+        User::Leave( KAknsRlErrBadLayerIndex );
+        }
+
+    CreateIfNeededL( aLayerIndex, aLayerStatus, aInitialize );
+
+    /*lint -save -e661 */ // Index is boundary checked above
+    if( (aLayerStatus==KAknsRlLayerRGBOnly) ||
+        (aLayerStatus==KAknsRlLayerRGBA) )
+        {
+        aData.iRGBBitmap = iLayers[aLayerIndex].iRGBBitmap;
+        aData.iRGBDevice = iLayers[aLayerIndex].iRGBDevice;
+        aData.iRGBGc     = iLayers[aLayerIndex].iRGBGc;
+        }
+
+    if( (aLayerStatus==KAknsRlLayerAlphaOnly) ||
+        (aLayerStatus==KAknsRlLayerRGBA) )
+        {
+        aData.iAlphaBitmap = iLayers[aLayerIndex].iAlphaBitmap;
+        aData.iAlphaDevice = iLayers[aLayerIndex].iAlphaDevice;
+        aData.iAlphaGc     = iLayers[aLayerIndex].iAlphaGc;
+        }
+    /*lint -restore */
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::GetSkinSrvSession
+// -----------------------------------------------------------------------------
+//
+RAknsSrvSession* CAknsAlEffectContext::GetSkinSrvSession()
+    {
+    return iSession;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::CreateIfNeededL
+// -----------------------------------------------------------------------------
+//
+void CAknsAlEffectContext::CreateIfNeededL( const TInt aLayerIndex,
+    const TInt aLayerStatus, const TBool aInitialize )
+    {
+    if( ( aLayerIndex < 0 ) || ( aLayerIndex >= KAknsAlEffectContextLayerN ) )
+        {
+        User::Leave( KAknsRlErrBadLayerIndex );
+        }
+
+    /*lint -save -e661 */ // Index is boundary checked above
+    if( iLayers[aLayerIndex].iRGBBitmap &&
+        iLayers[aLayerIndex].iAlphaBitmap ) return;
+
+    if( iLayers[aLayerIndex].iRGBBitmap ||
+        iLayers[aLayerIndex].iAlphaBitmap )
+        User::Leave( KAknsRlErrInternalState );
+
+    TSize size = LayerSize();
+
+    CFbsBitmap* bitmap = new (ELeave) CFbsBitmap();
+    CleanupStack::PushL( bitmap );
+    User::LeaveIfError( bitmap->Create( size, iRgbMode ) );
+
+    CFbsBitmapDevice* dev = CFbsBitmapDevice::NewL( bitmap );
+    CleanupStack::PushL( dev );
+
+    CFbsBitGc* gc = CFbsBitGc::NewL();
+    CleanupStack::PushL( gc );
+    gc->Activate( dev );
+
+    iLayers[aLayerIndex].iRGBBitmap = bitmap;
+    iLayers[aLayerIndex].iRGBDevice = dev;
+    iLayers[aLayerIndex].iRGBGc = gc;
+    CleanupStack::Pop(3); // gc, dev, bitmap
+
+    bitmap = new (ELeave) CFbsBitmap();
+    CleanupStack::PushL( bitmap );
+    User::LeaveIfError( bitmap->Create( size, EGray256 ) );
+
+    dev = CFbsBitmapDevice::NewL( bitmap );
+    CleanupStack::PushL( dev );
+
+    gc = CFbsBitGc::NewL();
+    CleanupStack::PushL( gc );
+    gc->Activate( dev );
+
+    iLayers[aLayerIndex].iAlphaBitmap = bitmap;
+    iLayers[aLayerIndex].iAlphaDevice = dev;
+    iLayers[aLayerIndex].iAlphaGc = gc;
+    CleanupStack::Pop(3); // gc, dev, bitmap
+
+    if( aInitialize )
+        {
+        switch( aLayerStatus )
+            {
+            case KAknsRlLayerRGBOnly:
+                iLayers[aLayerIndex].iRGBGc->SetBrushColor( KRgbBlack );
+                iLayers[aLayerIndex].iRGBGc->Clear();
+                iLayers[aLayerIndex].iAlphaGc->SetBrushColor( KRgbWhite );
+                iLayers[aLayerIndex].iAlphaGc->Clear();
+                break;
+            default:
+                iLayers[aLayerIndex].iRGBGc->SetBrushColor( KRgbBlack );
+                iLayers[aLayerIndex].iRGBGc->Clear();
+                iLayers[aLayerIndex].iAlphaGc->SetBrushColor( KRgbBlack );
+                iLayers[aLayerIndex].iAlphaGc->Clear();
+                break;
+            }
+        }
+    /*lint -restore */
+    }//lint !e661 Layer index is boundary checked
+
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::ReleaseLayers
+// -----------------------------------------------------------------------------
+//
+void CAknsAlEffectContext::ReleaseLayers()
+    {
+    for( TInt i=0; i < KAknsAlEffectContextLayerN; i++ )
+        {
+        ReleaseLayer( i );
+        }
+    }
+// -----------------------------------------------------------------------------
+// CAknsAlEffectContext::ReleaseLayer
+// -----------------------------------------------------------------------------
+//
+void CAknsAlEffectContext::ReleaseLayer( const TInt aLayerIndex )
+    {
+    ASSERT( aLayerIndex >= 0 && aLayerIndex < KAknsAlEffectContextLayerN );
+
+    /*lint -save -e661 */ // Never called with invalid index
+    delete iLayers[aLayerIndex].iRGBBitmap;
+    delete iLayers[aLayerIndex].iRGBDevice;
+    delete iLayers[aLayerIndex].iRGBGc;
+    delete iLayers[aLayerIndex].iAlphaBitmap;
+    delete iLayers[aLayerIndex].iAlphaDevice;
+    delete iLayers[aLayerIndex].iAlphaGc;
+
+    iLayers[aLayerIndex].iRGBBitmap   = NULL;
+    iLayers[aLayerIndex].iRGBDevice   = NULL;
+    iLayers[aLayerIndex].iRGBGc       = NULL;
+    iLayers[aLayerIndex].iAlphaBitmap = NULL;
+    iLayers[aLayerIndex].iAlphaDevice = NULL;
+    iLayers[aLayerIndex].iAlphaGc     = NULL;
+    /*lint -restore */
+    }
+
+// End of File