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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Declarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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 qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "pictureaffector.h"
#include "coloredparticle.h"
#include <QDebug>
#include <private/qsgtexture_p.h>
#include <private/qdeclarativepixmapcache_p.h>
QT_BEGIN_NAMESPACE
PictureAffector::PictureAffector(QSGItem *parent) :
ParticleAffector(parent), m_pix(0)
{
m_needsReset = true;
}
void PictureAffector::reset(int systemIdx)
{
ParticleAffector::reset(systemIdx);
}
void PictureAffector::startLoadImage()
{
if(m_pix)
m_pix->clear();
else
m_pix = new QDeclarativePixmap();
m_pix->load(qmlEngine(this), m_image, QDeclarativePixmap::Cache);
if(m_pix->isReady())
loadImage();
else
m_pix->connectFinished(this, SLOT(loadImage()));
}
void PictureAffector::loadImage()
{
m_loadedImage = m_pix->pixmap().toImage();
if(m_loadedImage.isNull())
qWarning() << "PictureAffector could not load picture " << m_image;
}
bool PictureAffector::affectParticle(ParticleData *d, qreal dt)
{
Q_UNUSED(dt);
if(!width() || !height()){
qWarning() << "PictureAffector needs a size";
return false;
}
if(m_loadedImage.isNull())
return false;
if(m_loadedImage.size()!=QSize(width(), height()))
m_loadedImage = m_loadedImage.scaled(width(), height());//TODO: Aspect Ratio Control?
bool affected = false;
QPoint pos = QPoint(d->curX() - m_offset.x(), d->curY() - m_offset.y());
if(!QRect(0,0,width(),height()).contains(pos)){
//XXX: Just a debugging helper, as I don't think it can get here.
qWarning() << "PictureAffector gives up.";
return false;
}
Color4ub c;
QRgb col = m_loadedImage.pixel(pos);
c.a = qAlpha(col);
c.b = qBlue(col);
c.g = qGreen(col);
c.r = qRed(col);
foreach(ParticleType *p, m_system->m_groupData[d->group]->types){
if(qobject_cast<ColoredParticle*>(p)){
ColoredParticle* cp = qobject_cast<ColoredParticle*>(p);
cp->reloadColor(c, d);
affected = true;
}
}
return affected;//Doesn't affect particle data, but necessary for onceOff
}
QT_END_NAMESPACE
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