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Diffstat (limited to 'src/imports/particles/maskextruder.cpp')
-rw-r--r-- | src/imports/particles/maskextruder.cpp | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/imports/particles/maskextruder.cpp b/src/imports/particles/maskextruder.cpp new file mode 100644 index 0000000000..53dacf4214 --- /dev/null +++ b/src/imports/particles/maskextruder.cpp @@ -0,0 +1,91 @@ +/**************************************************************************** +** +** 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 "maskextruder.h" +#include <QImage> +#include <QDebug> +QT_BEGIN_NAMESPACE +MaskExtruder::MaskExtruder(QObject *parent) : + ParticleExtruder(parent) + , m_lastWidth(-1) + , m_lastHeight(-1) +{ +} + +QPointF MaskExtruder::extrude(const QRectF &r) +{ + ensureInitialized(r); + if(!m_mask.count()) + return r.topLeft(); + const QPointF p = m_mask[rand() % m_mask.count()]; + //### Should random sub-pixel positioning be added? + return p + r.topLeft(); +} + +bool MaskExtruder::contains(const QRectF &bounds, const QPointF &point) +{ + ensureInitialized(bounds);//###Current usage patterns WILL lead to different bounds/r calls. Separate list? + QPoint p = point.toPoint() - bounds.topLeft().toPoint(); + return m_img.rect().contains(p) && (bool)m_img.pixelIndex(p); +} + +void MaskExtruder::ensureInitialized(const QRectF &r) +{ + if(m_lastWidth == r.width() && m_lastHeight == r.height()) + return; + m_lastWidth = r.width(); + m_lastHeight = r.height(); + + m_mask.clear(); + if(m_source.isEmpty()) + return; + m_img = QImage(m_source.toLocalFile()); + 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 |