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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 QSGCANVAS_P_H
#define QSGCANVAS_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 "qsgitem.h"
#include "qsgcanvas.h"
#include "qsgevent.h"
#include <private/qdeclarativeguard_p.h>
#include <private/qsgcontext_p.h>
#include <QtCore/qthread.h>
#include <QtCore/qmutex.h>
#include <QtCore/qwaitcondition.h>
#include <private/qwidget_p.h>
#include <private/qwindow_p.h>
#include <private/qgl_p.h>
#include <qguiglcontext_qpa.h>
#include <QtOpenGL/qglframebufferobject.h>
QT_BEGIN_NAMESPACE
//Make it easy to identify and customize the root item if needed
class QSGRootItem : public QSGItem
{
Q_OBJECT
public:
QSGRootItem();
};
class QSGCanvasPrivate;
class QTouchEvent;
class QSGCanvasRenderThread;
class QSGCanvasPrivate : public QWindowPrivate
{
public:
Q_DECLARE_PUBLIC(QSGCanvas)
static inline QSGCanvasPrivate *get(QSGCanvas *c) { return c->d_func(); }
QSGCanvasPrivate();
virtual ~QSGCanvasPrivate();
void init(QSGCanvas *);
QSGRootItem *rootItem;
QSGItem *activeFocusItem;
QSGItem *mouseGrabberItem;
// Mouse positions are saved in widget coordinates
QPoint lastMousePosition;
QPoint buttonDownPositions[5]; // Left, Right, Middle, XButton1, XButton2
void sceneMouseEventFromMouseEvent(QGraphicsSceneMouseEvent &, QMouseEvent *);
void translateTouchEvent(QTouchEvent *touchEvent);
static QEvent::Type sceneMouseEventTypeFromMouseEvent(QMouseEvent *);
static void sceneMouseEventForTransform(QGraphicsSceneMouseEvent &, const QTransform &);
static void transformTouchPoints(QList<QTouchEvent::TouchPoint> &touchPoints, const QTransform &transform);
bool deliverInitialMousePressEvent(QSGItem *, QGraphicsSceneMouseEvent *);
bool deliverMouseEvent(QGraphicsSceneMouseEvent *);
bool sendFilteredMouseEvent(QSGItem *, QSGItem *, QGraphicsSceneMouseEvent *);
bool deliverWheelEvent(QSGItem *, QWheelEvent *);
bool deliverTouchPoints(QSGItem *, QTouchEvent *, const QList<QTouchEvent::TouchPoint> &, QSet<int> *,
QHash<QSGItem *, QList<QTouchEvent::TouchPoint> > *);
bool deliverTouchEvent(QTouchEvent *);
bool deliverHoverEvent(QSGItem *, const QPointF &scenePos, const QPointF &lastScenePos, Qt::KeyboardModifiers modifiers, bool &accepted);
bool sendHoverEvent(QEvent::Type, QSGItem *, const QPointF &scenePos, const QPointF &lastScenePos,
Qt::KeyboardModifiers modifiers, bool accepted);
void clearHover();
void deliverDragEvent(QSGDragEvent *);
bool deliverDragEvent(QSGItem *item, QSGDragEvent *);
QDeclarativeGuard<QSGItem> hoverItem;
enum FocusOption {
DontChangeFocusProperty = 0x01,
};
Q_DECLARE_FLAGS(FocusOptions, FocusOption)
void setFocusInScope(QSGItem *scope, QSGItem *item, FocusOptions = 0);
void clearFocusInScope(QSGItem *scope, QSGItem *item, FocusOptions = 0);
void notifyFocusChangesRecur(QSGItem **item, int remaining);
void updateInputMethodData();
void dirtyItem(QSGItem *);
void cleanup(QSGNode *);
void initializeSceneGraph();
void polishItems();
void syncSceneGraph();
void renderSceneGraph(const QSize &size);
QSGItem::UpdatePaintNodeData updatePaintNodeData;
QSGItem *dirtyItemList;
QList<QSGNode *> cleanupNodeList;
QSet<QSGItem *> itemsToPolish;
void updateDirtyNodes();
void cleanupNodes();
bool updateEffectiveOpacity(QSGItem *);
void updateEffectiveOpacityRoot(QSGItem *, qreal);
void updateDirtyNode(QSGItem *);
QSGContext *context;
uint animationRunning: 1;
uint renderThreadAwakened : 1;
uint vsyncAnimations : 1;
QSGCanvasRenderThread *thread;
QSize widgetSize;
QSize viewportSize;
QAnimationDriver *animationDriver;
QGLFramebufferObject *renderTarget;
QHash<int, QSGItem *> itemForTouchPointId;
};
class QSGCanvasRenderThread : public QThread
{
Q_OBJECT
public:
QSGCanvasRenderThread()
: mutex(QMutex::NonRecursive)
, guiContext(0)
, glContext(0)
, isGuiBlocked(0)
, isPaintCompleted(false)
, isGuiBlockPending(false)
, isRenderBlocked(false)
, isExternalUpdatePending(false)
, syncAlreadyHappened(false)
, inSync(false)
, doGrab(false)
, shouldExit(false)
, hasExited(false)
{}
inline void lock() { mutex.lock(); }
inline void unlock() { mutex.unlock(); }
inline void wait() { condition.wait(&mutex); }
inline void wake() { condition.wakeOne(); }
void lockInGui();
void unlockInGui();
void paint();
void resize(const QSize &size);
void startRenderThread();
void stopRenderThread();
void exhaustSyncEvent();
void sync(bool guiAlreadyLocked);
QImage grab();
public slots:
void animationStarted();
void animationStopped();
public:
QMutex mutex;
QWaitCondition condition;
QSize windowSize;
QSize renderedSize;
QSGCanvas *renderer;
QSGCanvasPrivate *d;
QGuiGLContext *guiContext;
QGLContext *glContext;
int isGuiBlocked;
uint isPaintCompleted : 1;
uint isGuiBlockPending : 1;
uint isRenderBlocked : 1;
uint isExternalUpdatePending : 1;
uint syncAlreadyHappened : 1;
uint inSync : 1;
uint doGrab : 1;
uint shouldExit : 1;
uint hasExited : 1;
QImage grabContent;
void run();
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QSGCanvasPrivate::FocusOptions)
QT_END_NAMESPACE
#endif // QSGCANVAS_P_H
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