author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 07:56:43 +0200 | |
changeset 0 | 15bf7259bb7c |
child 24 | f93c875b566e |
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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#include "HuiFxVg10BrightnessContrastFilter.h" |
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#include "HuiFxConstants.h" |
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CHuiFxVg10BrightnessContrastFilter* CHuiFxVg10BrightnessContrastFilter::NewL() |
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{ |
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CHuiFxVg10BrightnessContrastFilter* e = new (ELeave) CHuiFxVg10BrightnessContrastFilter(); |
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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 CHuiFxVg10BrightnessContrastFilter::ConstructL() |
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{ |
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CHuiFxVg10ColorMatrixFilterBase::ConstructL(); |
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// neutral settings |
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iBrightness = 0.0f; |
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iContrast = 1.0f; |
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RegisterParameterL(KLitBrightness, &iBrightness); |
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RegisterParameterL(KLitContrast, &iContrast); |
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} |
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CHuiFxVg10BrightnessContrastFilter *CHuiFxVg10BrightnessContrastFilter::CloneL() const |
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{ |
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CHuiFxVg10BrightnessContrastFilter *filter = new(ELeave) CHuiFxVg10BrightnessContrastFilter; |
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filter->CHuiFxVg10ColorMatrixFilterBase::CopyFromL(this); |
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filter->iBrightness = iBrightness; |
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filter->iContrast = iContrast; |
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filter->CopyParameterL(KLitBrightness, &filter->iBrightness, this); |
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filter->CopyParameterL(KLitContrast, &filter->iContrast, this); |
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return filter; |
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} |
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|
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void CHuiFxVg10BrightnessContrastFilter::UpdateColorMatrix(void) |
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{ |
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// brightness [-1, 1] |
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const VGfloat offset_br = clamp(iBrightness, -1.0f, 1.0f); |
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const VGfloat scale_br = 1.0f - 0.5 * ((offset_br < 0.0f) ? -offset_br : offset_br); |
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// contrast [0, N] |
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const VGfloat scale_con = clamp(iContrast, 0.0f, 100.0f); |
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const VGfloat offset_con = -0.5f * scale_con + 0.5f ; |
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// combine the effects of brightness and contrast |
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const VGfloat off = offset_br + offset_con; |
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const VGfloat sc = scale_br * scale_con; |
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// take opacity into account |
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const VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f); |
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const VGfloat oOff = off * opacity; |
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const VGfloat oSc = (sc * opacity) + (1.0f - opacity); |
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iColorMatrix[0] = oSc; |
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iColorMatrix[1] = 0.0f; |
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iColorMatrix[2] = 0.0f; |
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iColorMatrix[3] = 0.0f; |
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iColorMatrix[4] = 0.0f; |
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iColorMatrix[5] = oSc; |
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iColorMatrix[6] = 0.0f; |
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iColorMatrix[7] = 0.0f; |
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iColorMatrix[8] = 0.0f; |
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iColorMatrix[9] = 0.0f; |
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iColorMatrix[10] = oSc; |
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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] = oOff; |
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iColorMatrix[17] = oOff; |
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iColorMatrix[18] = oOff; |
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iColorMatrix[19] = 0.0f; |
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} |