--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uiacceltk/hitchcock/coretoolkit/rendervg10/src/HuiFxVg10BrightnessContrastFilter.cpp	Tue Feb 02 07:56:43 2010 +0200
@@ -0,0 +1,91 @@
+/*
+* 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 "HuiFxVg10BrightnessContrastFilter.h"
+#include "HuiFxConstants.h"
+
+CHuiFxVg10BrightnessContrastFilter* CHuiFxVg10BrightnessContrastFilter::NewL()
+    {
+    CHuiFxVg10BrightnessContrastFilter* e = new (ELeave) CHuiFxVg10BrightnessContrastFilter();
+    CleanupStack::PushL(e);
+    e->ConstructL();
+    CleanupStack::Pop(e);
+    return e;
+    }
+
+void CHuiFxVg10BrightnessContrastFilter::ConstructL()
+    {
+    CHuiFxVg10ColorMatrixFilterBase::ConstructL();
+    // neutral settings
+    iBrightness = 0.0f;
+    iContrast = 1.0f;
+    RegisterParameterL(KLitBrightness, &iBrightness);
+    RegisterParameterL(KLitContrast, &iContrast);
+    }
+CHuiFxVg10BrightnessContrastFilter *CHuiFxVg10BrightnessContrastFilter::CloneL() const
+    {
+    CHuiFxVg10BrightnessContrastFilter *filter = new(ELeave) CHuiFxVg10BrightnessContrastFilter;
+    filter->CHuiFxVg10ColorMatrixFilterBase::CopyFromL(this);
+    filter->iBrightness = iBrightness;
+    filter->iContrast = iContrast;
+    filter->CopyParameterL(KLitBrightness, &filter->iBrightness, this);
+    filter->CopyParameterL(KLitContrast, &filter->iContrast, this);    
+    return filter;
+    }
+
+void CHuiFxVg10BrightnessContrastFilter::UpdateColorMatrix(void)
+    {
+    // brightness [-1, 1]
+    const VGfloat offset_br = clamp(iBrightness, -1.0f, 1.0f);
+    const VGfloat scale_br = 1.0f - 0.5 * ((offset_br < 0.0f) ? -offset_br : offset_br);
+    
+    // contrast [0, N]
+    const VGfloat scale_con = clamp(iContrast, 0.0f, 100.0f);
+    const VGfloat offset_con = -0.5f * scale_con + 0.5f ;
+    
+    // combine the effects of brightness and contrast
+    const VGfloat off = offset_br + offset_con;
+    const VGfloat sc  = scale_br * scale_con;
+
+    // take opacity into account
+    const VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f);
+    const VGfloat oOff = off * opacity;
+    const VGfloat oSc  = (sc * opacity) + (1.0f - opacity);
+    
+    iColorMatrix[0] = oSc;
+    iColorMatrix[1] = 0.0f;
+    iColorMatrix[2] = 0.0f;
+    iColorMatrix[3] = 0.0f;
+    iColorMatrix[4] = 0.0f;
+    iColorMatrix[5] = oSc;
+    iColorMatrix[6] = 0.0f;
+    iColorMatrix[7] = 0.0f;
+    iColorMatrix[8] = 0.0f;
+    iColorMatrix[9] = 0.0f;
+    iColorMatrix[10] = oSc;
+    iColorMatrix[11] = 0.0f;
+    iColorMatrix[12] = 0.0f;
+    iColorMatrix[13] = 0.0f;
+    iColorMatrix[14] = 0.0f;
+    iColorMatrix[15] = 1.0f;
+    iColorMatrix[16] = oOff;
+    iColorMatrix[17] = oOff;
+    iColorMatrix[18] = oOff;
+    iColorMatrix[19] = 0.0f;
+    }