qquickmaskextruder_p.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef MASKEXTRUDER_H
#define MASKEXTRUDER_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qquickparticleextruder_p.h"
#include <private/qquickpixmap_p.h>
#include <QUrl>
#include <QImage>
 
QT_BEGIN_NAMESPACE
 
class Q_QUICKPARTICLES_EXPORT QQuickMaskExtruder : public QQuickParticleExtruder
{
    Q_OBJECT
    Q_PROPERTY(QUrl source READ source WRITE setSource NOTIFY sourceChanged)
    QML_NAMED_ELEMENT(MaskShape)
    QML_ADDED_IN_VERSION(2, 0)
public:
    explicit QQuickMaskExtruder(QObject *parent = nullptr);
    QPointF extrude(const QRectF &) override;
    bool contains(const QRectF &bounds, const QPointF &point) override;
 
    QUrl source() const
    {
        return m_source;
    }
 
Q_SIGNALS:
 
    void sourceChanged(const QUrl &arg);
 
public Q_SLOTS:
    void setSource(const QUrl &arg);
 
private Q_SLOTS:
    void startMaskLoading();
    void finishMaskLoading();
 
private:
    QUrl m_source;
 
    void ensureInitialized(const QRectF &r);
    int m_lastWidth;
    int m_lastHeight;
    QQuickPixmap m_pix;
    QImage m_img;
    QList<QPointF> m_mask;//TODO: More memory efficient datastructures
    //Perhaps just the mask for the largest bounds is stored, and interpolate up
};
 
QT_END_NAMESPACE
 
#endif // MASKEXTRUDER_H