--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uiacceltk/hitchcock/coretoolkit/rendervg10/src/HuiFxVg10ColorizeFilter.cpp	Tue Feb 02 07:56:43 2010 +0200
@@ -0,0 +1,83 @@
+/*
+* Copyright (c) 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:   
+*
+*/
+
+
+
+#include "HuiFxVg10ColorizeFilter.h"
+#include "HuiFxConstants.h"
+
+CHuiFxVg10ColorizeFilter* CHuiFxVg10ColorizeFilter::NewL()
+    {
+    CHuiFxVg10ColorizeFilter* e = new (ELeave) CHuiFxVg10ColorizeFilter();
+    CleanupStack::PushL(e);
+    e->ConstructL();
+    CleanupStack::Pop(e);
+    return e;
+    }
+
+void CHuiFxVg10ColorizeFilter::ConstructL()
+    {
+    CHuiFxVg10ColorMatrixFilterBase::ConstructL();
+    iColor = TRgb(0xffffffff);
+    RegisterParameterL(KLitColor, &iColor);
+    }
+CHuiFxVg10ColorizeFilter *CHuiFxVg10ColorizeFilter::CloneL() const
+    {
+    CHuiFxVg10ColorizeFilter *filter = new(ELeave)CHuiFxVg10ColorizeFilter;
+    filter->CHuiFxVg10ColorMatrixFilterBase::CopyFromL(this);
+    filter->iColor = iColor;
+    filter->CopyParameterL(KLitColor, &filter->iColor, this);
+    return filter;
+    }
+
+void CHuiFxVg10ColorizeFilter::UpdateColorMatrix(void)
+    {
+    const VGfloat o = clamp(iOpacity, 0.0f, 1.0f);
+    const VGfloat ao = 1 - o;
+    const VGfloat Rw = 0.3086f;
+    const VGfloat Gw = 0.6094f;
+    const VGfloat Bw = 0.0820f;
+    const VGfloat R = (o / 255.0f) * (VGfloat)iColor.Red();
+    const VGfloat G = (o / 255.0f) * (VGfloat)iColor.Green();
+    const VGfloat B = (o / 255.0f) * (VGfloat)iColor.Blue();
+    
+    // this matrix is ((I * (1 - opacity)) + (I * opacity) * RGBMatrix * desaturateMatrix)T
+    // i.e. pixel is first converted to luminance, then multiplied by RGB, multiplied by opacity and finally the diagonal
+    // compensated with 1 - opacity.
+    // Precalculating abovementioned matrices to single matrix saves over a magnitude of multiplications and
+    // almost two magnitudes of additions. Also less memory is used and no unnecessary copying is involved.
+    iColorMatrix[0] = R*Rw + ao;
+    iColorMatrix[1] = G*Rw;
+    iColorMatrix[2] = B*Rw;
+    iColorMatrix[3] = 0.0f;
+    iColorMatrix[4] = R*Gw;
+    iColorMatrix[5] = G*Gw + ao;
+    iColorMatrix[6] = B*Gw;
+    iColorMatrix[7] = 0.0f;
+    iColorMatrix[8] = R*Bw;
+    iColorMatrix[9] = G*Bw;
+    iColorMatrix[10] = B*Bw + ao;
+    iColorMatrix[11] = 0.0f;
+    iColorMatrix[12] = 0.0f;
+    iColorMatrix[13] = 0.0f;
+    iColorMatrix[14] = 0.0f;
+    iColorMatrix[15] = 1.0f;
+    iColorMatrix[16] = 0.0f;
+    iColorMatrix[17] = 0.0f;
+    iColorMatrix[18] = 0.0f;
+    iColorMatrix[19] = 0.0f;    
+    }