src/hbcore/effects/hbeffectbc.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 19 Apr 2010 14:02:13 +0300
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/****************************************************************************
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**
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** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (developer.feedback@nokia.com)
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**
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** This file is part of the HbCore module of the UI Extensions for Mobile.
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**
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this file.
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** Please review the following information to ensure the GNU Lesser General
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** Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at developer.feedback@nokia.com.
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**
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****************************************************************************/
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#include <hbglobal.h>
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#ifdef HB_FILTER_EFFECTS
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#include "hbeffectbc_p.h"
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#include "hbeffectgroup_p.h"
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#include "hbeffectdef_p.h"
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#include "hbvgchainedeffect_p.h"
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#include "hbvgbceffect_p.h"
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#include "hbeffectfilter_p.h"
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#include <QGraphicsItem>
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#include <QtDebug>
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// -----------------------------------------------------------------------------
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// HbEffectBc
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HbEffectBc::HbEffectBc(
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    const HbEffectFxmlFilterData &data,
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    QGraphicsItem *item,
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    HbEffectGroup *group) :
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        HbEffectFilter(0, item, group),
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        mAnimationO(0),
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        mAnimationB(0),
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        mAnimationC(0),
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        mVgBc(0)
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{
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    // Default values of if something is not passed in FXML
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    qreal opacity_start = 1;
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    qreal opacity_end = 1;
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    qreal brightness_start = 0;
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    qreal brightness_end = 0;
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    qreal contrast_start = 1;
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    qreal contrast_end = 1;
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    QList<HbEffectFxmlParamData> params = data.paramData();
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    // Handle FXML parameters
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    Q_FOREACH(const HbEffectFxmlParamData &param, params) {
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        if (param.name() == FXML_KEYWORD_BRIGHTNESS_CONTRAST_OPACITY) {
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            mAnimationO = createAnimation(param, opacity_start, opacity_end, group);
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        }
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        else if (param.name() == FXML_KEYWORD_BRIGHTNESS_CONTRAST_BRIGHTNESS) {
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            mAnimationB = createAnimation(param, brightness_start, brightness_end, group);
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        }
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        else if (param.name() == FXML_KEYWORD_BRIGHTNESS_CONTRAST_CONTRAST) {
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            mAnimationC = createAnimation(param, contrast_start, contrast_end, group);
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        }
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    }
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    // Create VG effect if there were effect parameters defined
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    if (mEffectDefined) {
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        // Add effect to the filter effect chain in the effect group
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        HbVgChainedEffect *chain = HbEffectAbstract::group()->vgEffect();
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        mVgBc = new HbVgBcEffect();
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        mVgBc->setCaching(true);
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        chain->add(mVgBc);
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        // Set initial values for the effect
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        mVgBc->setOpacity(opacity_start);
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        mVgBc->setBrightness(brightness_start);
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        mVgBc->setContrast(contrast_start);
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    }
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}
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HbEffectBc::~HbEffectBc()
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{
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}
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QString HbEffectBc::name() const
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{
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    return HB_EFFECT_NAME_BRIGHTNESS_CONTRAST;
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}
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void HbEffectBc::updateFilterEffect()
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{
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    // Only update the graphics effect if the effect is running
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    if (group()->isRunning()) {
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        if (mAnimationO) {
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            mVgBc->setOpacity(qVariantValue<qreal>(mAnimationO->currentValue()));
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        }
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        if (mAnimationB) {
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            mVgBc->setBrightness(qVariantValue<qreal>(mAnimationB->currentValue()));
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        }
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        if (mAnimationC) {
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            mVgBc->setContrast(qVariantValue<qreal>(mAnimationC->currentValue()));
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        }
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    }
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}
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#endif