/****************************************************************************
**
** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (developer.feedback@nokia.com)
**
** This file is part of the HbCore module of the UI Extensions for Mobile.
**
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at developer.feedback@nokia.com.
**
****************************************************************************/
#include "hbvgcolorizeeffect_p.h"
#include "hbvgcolorizeeffect_p_p.h"
#include <QPainter>
/*!
* \class HbVgColorizeEffect
*
* \brief OpenVG-based colorize filter effect.
*
* \internal
*/
HbVgColorizeEffectPrivate::HbVgColorizeEffectPrivate()
: color(Qt::white)
{
}
HbVgColorizeEffect::HbVgColorizeEffect(QObject *parent)
: HbVgEffect(*new HbVgColorizeEffectPrivate, parent)
{
}
HbVgColorizeEffect::HbVgColorizeEffect(HbVgColorizeEffectPrivate &dd, QObject *parent)
: HbVgEffect(dd, parent)
{
}
HbVgColorizeEffect::~HbVgColorizeEffect()
{
}
QColor HbVgColorizeEffect::color() const
{
Q_D(const HbVgColorizeEffect);
return d->color;
}
void HbVgColorizeEffect::setColor(const QColor &color)
{
Q_D(HbVgColorizeEffect);
if (d->color == color)
return;
d->color = color;
updateEffect();
emit colorChanged(color);
}
QRectF HbVgColorizeEffect::boundingRectFor(const QRectF &rect) const
{
return rect;
}
#ifdef HB_EFFECTS_OPENVG
const VGfloat Rw = 0.3086f;
const VGfloat Gw = 0.6094f;
const VGfloat Bw = 0.0820f;
void HbVgColorizeEffectPrivate::getColorMatrix(VGfloat *colorMatrix,
const QColor &color,
qreal opacity)
{
const VGfloat o = (VGfloat) opacity;
const VGfloat ao = 1 - o;
const VGfloat R = (o / 255.0f) * (VGfloat) color.red();
const VGfloat G = (o / 255.0f) * (VGfloat) color.green();
const VGfloat B = (o / 255.0f) * (VGfloat) color.blue();
colorMatrix[0] = R*Rw + ao;
colorMatrix[1] = G*Rw;
colorMatrix[2] = B*Rw;
colorMatrix[3] = 0.0f;
colorMatrix[4] = R*Gw;
colorMatrix[5] = G*Gw + ao;
colorMatrix[6] = B*Gw;
colorMatrix[7] = 0.0f;
colorMatrix[8] = R*Bw;
colorMatrix[9] = G*Bw;
colorMatrix[10] = B*Bw + ao;
colorMatrix[11] = 0.0f;
colorMatrix[12] = 0.0f;
colorMatrix[13] = 0.0f;
colorMatrix[14] = 0.0f;
colorMatrix[15] = 1.0f;
colorMatrix[16] = 0.0f;
colorMatrix[17] = 0.0f;
colorMatrix[18] = 0.0f;
colorMatrix[19] = 0.0f;
}
#endif
void HbVgColorizeEffect::performEffect(QPainter *painter,
const QPointF &offset,
const QVariant &vgImage,
const QSize &vgImageSize)
{
#ifdef HB_EFFECTS_OPENVG
QPixmap cachedPm = cached(vgImageSize);
if (!cachedPm.isNull()) {
painter->drawPixmap(offset, cachedPm);
return;
}
Q_D(HbVgColorizeEffect);
VGImage srcImage = vgImage.value<VGImage>();
VGImage dstImage = d->ensurePixmap(&d->dstPixmap, vgImageSize);
qreal opacity = clamp(d->opacity, 0.0f, 1.0f);
if (opacity > HBVG_EPSILON) {
if (d->paramsChanged)
HbVgColorizeEffectPrivate::getColorMatrix(d->colorMatrix, d->color, opacity);
vgColorMatrix(dstImage, srcImage, d->colorMatrix);
painter->drawPixmap(offset, d->dstPixmap);
tryCache(d->dstPixmap);
} else {
painter->drawPixmap(offset, d->srcPixmap);
}
#else
Q_UNUSED(painter);
Q_UNUSED(offset);
Q_UNUSED(vgImage);
Q_UNUSED(vgImageSize);
#endif
}