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Diffstat (limited to 'src/quick/particles/qquickmaskextruder.cpp')
-rw-r--r-- | src/quick/particles/qquickmaskextruder.cpp | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/quick/particles/qquickmaskextruder.cpp b/src/quick/particles/qquickmaskextruder.cpp new file mode 100644 index 0000000000..f4850712f0 --- /dev/null +++ b/src/quick/particles/qquickmaskextruder.cpp @@ -0,0 +1,113 @@ +/**************************************************************************** +** +** 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 |