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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative 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.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQUICKCANVASITEM_P_H
#define QQUICKCANVASITEM_P_H
#include <qquickitem.h>
#include <private/qv8engine_p.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Declarative)
class QQuickContext2D;
class QQuickCanvasItemPrivate;
class Q_DECLARATIVE_EXPORT QQuickCanvasItem : public QQuickItem
{
Q_OBJECT
Q_ENUMS(RenderTarget)
Q_ENUMS(ImageFilterMode)
Q_PROPERTY(QSizeF canvasSize READ canvasSize WRITE setCanvasSize NOTIFY canvasSizeChanged)
Q_PROPERTY(QSize tileSize READ tileSize WRITE setTileSize NOTIFY tileSizeChanged)
Q_PROPERTY(QRectF canvasWindow READ canvasWindow WRITE setCanvasWindow NOTIFY canvasWindowChanged)
Q_PROPERTY(bool renderInThread READ renderInThread WRITE setRenderInThread NOTIFY renderInThreadChanged)
Q_PROPERTY(RenderTarget renderTarget READ renderTarget WRITE setRenderTarget NOTIFY renderTargetChanged)
public:
enum RenderTarget {
Image,
FramebufferObject
};
enum ImageFilterMode {
Threshold,
Mono,
GrayScale,
Brightness,
Invert,
Blur,
Opaque,
Convolute
};
QQuickCanvasItem(QQuickItem *parent = 0);
~QQuickCanvasItem();
QSizeF canvasSize() const;
void setCanvasSize(const QSizeF &);
QSize tileSize() const;
void setTileSize(const QSize &);
QRectF canvasWindow() const;
void setCanvasWindow(const QRectF& rect);
bool renderInThread() const;
void setRenderInThread(bool renderInThread);
RenderTarget renderTarget() const;
void setRenderTarget(RenderTarget target);
QQuickContext2D* context() const;
QImage toImage(const QRectF& region = QRectF()) const;
QImage loadedImage(const QUrl& url);
Q_SIGNALS:
void paint(QDeclarativeV8Handle context, const QRect ®ion);
void painted();
void canvasSizeChanged();
void tileSizeChanged();
void renderInThreadChanged();
void textureChanged();
void canvasWindowChanged();
void renderTargetChanged();
void imageLoaded();
public Q_SLOTS:
QString toDataURL(const QString& type = QLatin1String("image/png")) const;
QDeclarativeV8Handle getContext(const QString & = QLatin1String("2d"));
void markDirty(const QRectF& region);
void requestPaint() {markDirty(canvasWindow());}
// Save current canvas to disk
bool save(const QString& filename) const;
void loadImage(const QUrl& url);
void unloadImage(const QUrl& url);
bool isImageLoaded(const QUrl& url) const;
bool isImageLoading(const QUrl& url) const;
bool isImageError(const QUrl& url) const;
private Q_SLOTS:
void _doPainting(const QRectF& region);
protected:
virtual void componentComplete();
virtual QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *);
virtual void geometryChanged(const QRectF &newGeometry,
const QRectF &oldGeometry);
virtual void updatePolish();
private:
void createContext();
void createTexture();
Q_DECLARE_PRIVATE(QQuickCanvasItem)
friend class QQuickContext2D;
friend class QQuickContext2DTexture;
};
QT_END_NAMESPACE
QML_DECLARE_TYPE(QQuickCanvasItem)
QT_END_HEADER
#endif //QQUICKCANVASITEM_P_H
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