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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.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** 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.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU General
-** Public License version 3.0 as published by the Free Software Foundation
-** and appearing in the file LICENSE.GPL included in the packaging of this
-** file. Please review the following information to ensure the GNU General
-** Public License version 3.0 requirements will be met:
-** http://www.gnu.org/copyleft/gpl.html.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "qquickmaskextruder_p.h"
-#include <QImage>
-#include <QDebug>
-QT_BEGIN_NAMESPACE
-/*!
- \qmlclass MaskShape QQuickMaskExtruder
- \inqmlmodule QtQuick.Particles 2
- \inherits Shape
- \brief The MaskShape element allows you to represent an image as a shape to affectors and emitters.
-
-*/
-/*!
- \qmlproperty url QtQuick.Particles2::MaskShape::source
-
- The image to use as the mask. Areas with non-zero opacity
- will be considered inside the shape.
-*/
-
-
-QQuickMaskExtruder::QQuickMaskExtruder(QObject *parent) :
- QQuickParticleExtruder(parent)
- , m_lastWidth(-1)
- , m_lastHeight(-1)
-{
-}
-
-QPointF QQuickMaskExtruder::extrude(const QRectF &r)
-{
- ensureInitialized(r);
- if (!m_mask.count() || m_img.isNull())
- return r.topLeft();
- const QPointF p = m_mask[rand() % m_mask.count()];
- //### Should random sub-pixel positioning be added?
- return p + r.topLeft();
-}
-
-bool QQuickMaskExtruder::contains(const QRectF &bounds, const QPointF &point)
-{
- ensureInitialized(bounds);//###Current usage patterns WILL lead to different bounds/r calls. Separate list?
- if (m_img.isNull())
- return false;
- QPoint p = point.toPoint() - bounds.topLeft().toPoint();
- return m_img.rect().contains(p) && (bool)m_img.pixelIndex(p);
-}
-
-void QQuickMaskExtruder::ensureInitialized(const QRectF &r)
-{
- if (m_lastWidth == r.width() && m_lastHeight == r.height())
- return;//Same as before
- m_lastWidth = r.width();
- m_lastHeight = r.height();
-
- m_img = QImage();
- m_mask.clear();
- if (m_source.isEmpty())
- return;
- m_img = QImage(m_source.toLocalFile());
- if (m_img.isNull()){
- qWarning() << "MaskShape: Cannot load" << qPrintable(m_source.toLocalFile());
- return;
- }
- m_img = m_img.createAlphaMask();
- m_img = m_img.convertToFormat(QImage::Format_Mono);//Else LSB, but I think that's easier
- m_img = m_img.scaled(r.size().toSize());//TODO: Do they need aspect ratio stuff? Or tiling?
- for (int i=0; i<r.width(); i++){
- for (int j=0; j<r.height(); j++){
- if (m_img.pixelIndex(i,j))//Direct bit manipulation is presumably more efficient
- m_mask << QPointF(i,j);
- }
- }
-}
-QT_END_NAMESPACE