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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QSGRENDERLOOP_P_H
#define QSGRENDERLOOP_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 <QtGui/qimage.h>
#include <QtGui/qsurface.h>
#include <private/qtquickglobal_p.h>
#include <QtCore/qset.h>
#include <QtCore/qobject.h>
#include <QtCore/qcoreevent.h>
QT_BEGIN_NAMESPACE
class QQuickWindow;
class QSGContext;
class QSGRenderContext;
class QAnimationDriver;
class QRunnable;
class Q_QUICK_EXPORT QSGRenderLoop : public QObject
{
Q_OBJECT
public:
enum RenderLoopFlags {
SupportsGrabWithoutExpose = 0x01
};
virtual ~QSGRenderLoop();
virtual void show(QQuickWindow *window) = 0;
virtual void hide(QQuickWindow *window) = 0;
virtual void resize(QQuickWindow *) {};
virtual void windowDestroyed(QQuickWindow *window) = 0;
virtual void exposureChanged(QQuickWindow *window) = 0;
virtual QImage grab(QQuickWindow *window) = 0;
virtual void update(QQuickWindow *window) = 0;
virtual void maybeUpdate(QQuickWindow *window) = 0;
virtual void handleUpdateRequest(QQuickWindow *) { }
virtual QAnimationDriver *animationDriver() const = 0;
virtual QSGContext *sceneGraphContext() const = 0;
virtual QSGRenderContext *createRenderContext(QSGContext *) const = 0;
virtual void releaseResources(QQuickWindow *window) = 0;
virtual void postJob(QQuickWindow *window, QRunnable *job);
void addWindow(QQuickWindow *win) { m_windows.insert(win); }
void removeWindow(QQuickWindow *win) { m_windows.remove(win); }
QSet<QQuickWindow *> windows() const { return m_windows; }
virtual QSurface::SurfaceType windowSurfaceType() const;
// ### make this less of a singleton
static QSGRenderLoop *instance();
static void setInstance(QSGRenderLoop *instance);
virtual bool interleaveIncubation() const { return false; }
virtual int flags() const { return 0; }
static void cleanup();
void handleContextCreationFailure(QQuickWindow *window);
Q_SIGNALS:
void timeToIncubate();
private:
static QSGRenderLoop *s_instance;
QSet<QQuickWindow *> m_windows;
};
enum QSGRenderLoopType
{
BasicRenderLoop,
ThreadedRenderLoop
};
enum QSGCustomEvents {
// Passed from the RL to the RT when a window is removed obscured and
// should be removed from the render loop.
WM_Obscure = QEvent::User + 1,
// Passed from the RL to RT when GUI has been locked, waiting for sync
// (updatePaintNode())
WM_RequestSync = QEvent::User + 2,
// Passed from the RL to the RT when a window is exposed
WM_Exposed = QEvent::User + 3,
// Passed by the RL to the RT to free up maybe release SG and GL contexts
// if no windows are rendering.
WM_TryRelease = QEvent::User + 4,
// Passed by the RL to the RT when a QQuickWindow::grabWindow() is
// called.
WM_Grab = QEvent::User + 5,
// Passed by the window when there is a render job to run
WM_PostJob = QEvent::User + 6,
// When using the QRhi this is sent upon PlatformSurfaceAboutToBeDestroyed from
// the event filter installed on the QQuickWindow.
WM_ReleaseSwapchain = QEvent::User + 7,
};
QT_END_NAMESPACE
#endif // QSGRENDERLOOP_P_H
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