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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 <QtQuick/qquickitem.h>
+#include <private/qv8engine_p.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QQuickContext2D;
+class QQuickCanvasItemPrivate;
+class Q_QUICK_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 &region);
+ 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