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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQUICKCANVASITEM_P_H
#define QQUICKCANVASITEM_P_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 <private/qtquickglobal_p.h>
QT_REQUIRE_CONFIG(quick_canvas);
#include <QtQuick/qquickitem.h>
#include <private/qv8engine_p.h>
#include <private/qqmlrefcount_p.h>
#include <QtCore/QThread>
#include <QtGui/QImage>
QT_BEGIN_NAMESPACE
class QQuickCanvasContext;
class QQuickCanvasItemPrivate;
class QQuickPixmap;
class QQuickCanvasPixmap : public QQmlRefCount
{
public:
QQuickCanvasPixmap(const QImage& image);
QQuickCanvasPixmap(QQuickPixmap *pixmap);
~QQuickCanvasPixmap();
QImage image();
qreal width() const;
qreal height() const;
bool isValid() const;
QQuickPixmap *pixmap() const { return m_pixmap;}
private:
QQuickPixmap *m_pixmap;
QImage m_image;
};
class QQuickCanvasItem : public QQuickItem
{
Q_OBJECT
Q_PROPERTY(bool available READ isAvailable NOTIFY availableChanged)
Q_PROPERTY(QString contextType READ contextType WRITE setContextType NOTIFY contextTypeChanged)
Q_PROPERTY(QQmlV4Handle context READ context NOTIFY contextChanged)
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(RenderTarget renderTarget READ renderTarget WRITE setRenderTarget NOTIFY renderTargetChanged)
Q_PROPERTY(RenderStrategy renderStrategy READ renderStrategy WRITE setRenderStrategy NOTIFY renderStrategyChanged)
public:
enum RenderTarget {
Image,
FramebufferObject
};
Q_ENUM(RenderTarget)
enum RenderStrategy {
Immediate,
Threaded,
Cooperative
};
Q_ENUM(RenderStrategy)
QQuickCanvasItem(QQuickItem *parent = 0);
~QQuickCanvasItem();
bool isAvailable() const;
QString contextType() const;
void setContextType(const QString &contextType);
QQmlV4Handle context() const;
QSizeF canvasSize() const;
void setCanvasSize(const QSizeF &);
QSize tileSize() const;
void setTileSize(const QSize &);
QRectF canvasWindow() const;
void setCanvasWindow(const QRectF& rect);
RenderTarget renderTarget() const;
void setRenderTarget(RenderTarget target);
RenderStrategy renderStrategy() const;
void setRenderStrategy(RenderStrategy strategy);
QQuickCanvasContext *rawContext() const;
QImage toImage(const QRectF& rect = QRectF()) const;
Q_INVOKABLE void getContext(QQmlV4Function *args);
Q_INVOKABLE void requestAnimationFrame(QQmlV4Function *args);
Q_INVOKABLE void cancelRequestAnimationFrame(QQmlV4Function *args);
Q_INVOKABLE void requestPaint();
Q_INVOKABLE void markDirty(const QRectF& dirtyRect = QRectF());
Q_INVOKABLE bool save(const QString &filename) const;
Q_INVOKABLE QString toDataURL(const QString& type = QLatin1String("image/png")) const;
QQmlRefPointer<QQuickCanvasPixmap> loadedPixmap(const QUrl& url);
bool isTextureProvider() const override;
QSGTextureProvider *textureProvider() const override;
Q_SIGNALS:
void paint(const QRect ®ion);
void painted();
void availableChanged();
void contextTypeChanged();
void contextChanged();
void canvasSizeChanged();
void tileSizeChanged();
void canvasWindowChanged();
void renderTargetChanged();
void renderStrategyChanged();
void imageLoaded();
public Q_SLOTS:
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 sceneGraphInitialized();
void checkAnimationCallbacks();
void invalidateSceneGraph();
void schedulePolish();
protected:
void componentComplete() override;
void itemChange(QQuickItem::ItemChange, const QQuickItem::ItemChangeData &) override;
void updatePolish() override;
QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *) override;
void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) override;
void releaseResources() override;
bool event(QEvent *event) override;
private:
Q_DECLARE_PRIVATE(QQuickCanvasItem)
Q_INVOKABLE void delayedCreate();
bool createContext(const QString &contextType);
void initializeContext(QQuickCanvasContext *context, const QVariantMap &args = QVariantMap());
static QRect tiledRect(const QRectF &window, const QSize &tileSize);
bool isPaintConnected();
};
class QQuickContext2DRenderThread : public QThread
{
Q_OBJECT
public:
QQuickContext2DRenderThread(QQmlEngine *eng);
~QQuickContext2DRenderThread();
static QQuickContext2DRenderThread *instance(QQmlEngine *engine);
private:
QQmlEngine *m_engine;
QObject *m_eventLoopQuitHack;
static QHash<QQmlEngine *,QQuickContext2DRenderThread*> renderThreads;
static QMutex renderThreadsMutex;
};
QT_END_NAMESPACE
QML_DECLARE_TYPE(QQuickCanvasItem)
#endif //QQUICKCANVASITEM_P_H
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