author | William Roberts <williamr@symbian.org> |
Fri, 12 Nov 2010 11:42:24 +0000 | |
branch | RCL_3 |
changeset 66 | 8ee165fddeb6 |
parent 0 | 15bf7259bb7c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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|
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|
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|
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#include "HuiFxVg10ColorizeFilter.h" |
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#include "HuiFxConstants.h" |
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|
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CHuiFxVg10ColorizeFilter* CHuiFxVg10ColorizeFilter::NewL() |
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{ |
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CHuiFxVg10ColorizeFilter* e = new (ELeave) CHuiFxVg10ColorizeFilter(); |
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CleanupStack::PushL(e); |
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e->ConstructL(); |
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CleanupStack::Pop(e); |
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return e; |
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} |
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|
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void CHuiFxVg10ColorizeFilter::ConstructL() |
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{ |
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CHuiFxVg10ColorMatrixFilterBase::ConstructL(); |
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iColor = TRgb(0xffffffff); |
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RegisterParameterL(KLitColor, &iColor); |
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} |
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CHuiFxVg10ColorizeFilter *CHuiFxVg10ColorizeFilter::CloneL() const |
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{ |
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CHuiFxVg10ColorizeFilter *filter = new(ELeave)CHuiFxVg10ColorizeFilter; |
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filter->CHuiFxVg10ColorMatrixFilterBase::CopyFromL(this); |
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filter->iColor = iColor; |
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filter->CopyParameterL(KLitColor, &filter->iColor, this); |
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return filter; |
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} |
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|
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void CHuiFxVg10ColorizeFilter::UpdateColorMatrix(void) |
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{ |
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const VGfloat o = clamp(iOpacity, 0.0f, 1.0f); |
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const VGfloat ao = 1 - o; |
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const VGfloat Rw = 0.3086f; |
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const VGfloat Gw = 0.6094f; |
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const VGfloat Bw = 0.0820f; |
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const VGfloat R = (o / 255.0f) * (VGfloat)iColor.Red(); |
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const VGfloat G = (o / 255.0f) * (VGfloat)iColor.Green(); |
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const VGfloat B = (o / 255.0f) * (VGfloat)iColor.Blue(); |
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|
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// this matrix is ((I * (1 - opacity)) + (I * opacity) * RGBMatrix * desaturateMatrix)T |
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// i.e. pixel is first converted to luminance, then multiplied by RGB, multiplied by opacity and finally the diagonal |
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// compensated with 1 - opacity. |
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// Precalculating abovementioned matrices to single matrix saves over a magnitude of multiplications and |
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// almost two magnitudes of additions. Also less memory is used and no unnecessary copying is involved. |
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iColorMatrix[0] = R*Rw + ao; |
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iColorMatrix[1] = G*Rw; |
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iColorMatrix[2] = B*Rw; |
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iColorMatrix[3] = 0.0f; |
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iColorMatrix[4] = R*Gw; |
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iColorMatrix[5] = G*Gw + ao; |
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iColorMatrix[6] = B*Gw; |
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iColorMatrix[7] = 0.0f; |
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iColorMatrix[8] = R*Bw; |
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iColorMatrix[9] = G*Bw; |
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iColorMatrix[10] = B*Bw + ao; |
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iColorMatrix[11] = 0.0f; |
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iColorMatrix[12] = 0.0f; |
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iColorMatrix[13] = 0.0f; |
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iColorMatrix[14] = 0.0f; |
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iColorMatrix[15] = 1.0f; |
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iColorMatrix[16] = 0.0f; |
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iColorMatrix[17] = 0.0f; |
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iColorMatrix[18] = 0.0f; |
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iColorMatrix[19] = 0.0f; |
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} |