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| |
| #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/qqmlrefcount_p.h> |
| #include <QtCore/QThread> |
| #include <QtCore/qmutex.h> |
| #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(QJSValue 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) |
| QML_NAMED_ELEMENT(Canvas) |
| |
| public: |
| enum RenderTarget { |
| Image, |
| FramebufferObject |
| }; |
| Q_ENUM(RenderTarget) |
| |
| enum RenderStrategy { |
| Immediate, |
| Threaded, |
| Cooperative |
| }; |
| Q_ENUM(RenderStrategy) |
| |
| QQuickCanvasItem(QQuickItem *parent = nullptr); |
| ~QQuickCanvasItem(); |
| |
| bool isAvailable() const; |
| |
| QString contextType() const; |
| void setContextType(const QString &contextType); |
| |
| QJSValue 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 |