1 /****************************************************************************
3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
4 ** Contact: http://www.qt-project.org/
6 ** This file is part of the QtQuick module of the Qt Toolkit.
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** GNU Lesser General Public License Usage
10 ** This file may be used under the terms of the GNU Lesser General Public
11 ** License version 2.1 as published by the Free Software Foundation and
12 ** appearing in the file LICENSE.LGPL included in the packaging of this
13 ** file. Please review the following information to ensure the GNU Lesser
14 ** General Public License version 2.1 requirements will be met:
15 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
17 ** In addition, as a special exception, Nokia gives you certain additional
18 ** rights. These rights are described in the Nokia Qt LGPL Exception
19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
21 ** GNU General Public License Usage
22 ** Alternatively, this file may be used under the terms of the GNU General
23 ** Public License version 3.0 as published by the Free Software Foundation
24 ** and appearing in the file LICENSE.GPL included in the packaging of this
25 ** file. Please review the following information to ensure the GNU General
26 ** Public License version 3.0 requirements will be met:
27 ** http://www.gnu.org/copyleft/gpl.html.
30 ** Alternatively, this file may be used in accordance with the terms and
31 ** conditions contained in a signed written agreement between you and Nokia.
40 ****************************************************************************/
42 #include "qquickmaskextruder_p.h"
43 #include <QtQml/qqml.h>
44 #include <QtQml/qqmlinfo.h>
49 \qmlclass MaskShape QQuickMaskExtruder
50 \inqmlmodule QtQuick.Particles 2
52 \brief For representing an image as a shape to affectors and emitters
53 \ingroup qtquick-particles
57 \qmlproperty url QtQuick.Particles2::MaskShape::source
59 The image to use as the mask. Areas with non-zero opacity
60 will be considered inside the shape.
64 QQuickMaskExtruder::QQuickMaskExtruder(QObject *parent) :
65 QQuickParticleExtruder(parent)
71 void QQuickMaskExtruder::setSource(QUrl arg)
73 if (m_source != arg) {
76 m_lastHeight = -1;//Trigger reset
78 emit sourceChanged(arg);
83 void QQuickMaskExtruder::startMaskLoading()
86 if (m_source.isEmpty())
88 m_pix.load(qmlEngine(this), m_source);
89 if (m_pix.isLoading())
90 m_pix.connectFinished(this, SLOT(finishMaskLoading()));
95 void QQuickMaskExtruder::finishMaskLoading()
98 qmlInfo(this) << m_pix.error();
101 QPointF QQuickMaskExtruder::extrude(const QRectF &r)
103 ensureInitialized(r);
104 if (!m_mask.count() || m_img.isNull())
106 const QPointF p = m_mask[rand() % m_mask.count()];
107 //### Should random sub-pixel positioning be added?
108 return p + r.topLeft();
111 bool QQuickMaskExtruder::contains(const QRectF &bounds, const QPointF &point)
113 ensureInitialized(bounds);//###Current usage patterns WILL lead to different bounds/r calls. Separate list?
116 QPoint p = point.toPoint() - bounds.topLeft().toPoint();
117 return m_img.rect().contains(p) && (bool)m_img.pixelIndex(p);
120 void QQuickMaskExtruder::ensureInitialized(const QRectF &r)
122 if (m_lastWidth == r.width() && m_lastHeight == r.height())
123 return;//Same as before
124 if (!m_pix.isReady())
126 m_lastWidth = r.width();
127 m_lastHeight = r.height();
131 m_img = m_pix.image().createAlphaMask();
132 m_img = m_img.convertToFormat(QImage::Format_Mono);//Else LSB, but I think that's easier
133 m_img = m_img.scaled(r.size().toSize());//TODO: Do they need aspect ratio stuff? Or tiling?
134 for (int i=0; i<r.width(); i++){
135 for (int j=0; j<r.height(); j++){
136 if (m_img.pixelIndex(i,j))//Direct bit manipulation is presumably more efficient
137 m_mask << QPointF(i,j);