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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://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.LGPLv3 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.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 later 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 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "platformsurfacefilter_p.h"
#include <Qt3DRenderer/private/renderer_p.h>
#include <QMetaObject>
#include <QPlatformSurfaceEvent>
#include <QOffscreenSurface>
#include <QtGui/qwindow.h>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
PlatformSurfaceFilter::PlatformSurfaceFilter(Renderer *renderer,
QObject *parent)
: QObject(parent)
, m_obj(Q_NULLPTR)
, m_surface(Q_NULLPTR)
, m_renderer(renderer)
{
Q_ASSERT(m_renderer);
qRegisterMetaType<QSurface *>("QSurface*");
}
PlatformSurfaceFilter::~PlatformSurfaceFilter()
{
if (m_obj)
m_obj->removeEventFilter(this);
}
void PlatformSurfaceFilter::setWindow(QWindow *window)
{
setSurface(window);
}
void PlatformSurfaceFilter::setOffscreenSurface(QOffscreenSurface *offscreen)
{
setSurface(offscreen);
}
bool PlatformSurfaceFilter::eventFilter(QObject *obj, QEvent *e)
{
if (obj == m_obj && e->type() == QEvent::PlatformSurface) {
QPlatformSurfaceEvent *ev = static_cast<QPlatformSurfaceEvent *>(e);
switch (ev->surfaceEventType()) {
case QPlatformSurfaceEvent::SurfaceCreated:
setRendererSurface(m_surface);
break;
case QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed:
setSurface<QWindow>(Q_NULLPTR);
setRendererSurface(Q_NULLPTR);
break;
default:
qCritical("Unknown surface type");
Q_UNREACHABLE();
}
}
return false;
}
void PlatformSurfaceFilter::setRendererSurface(QSurface *surface)
{
// Tell the renderer about the surface on which to render. This function
// is called in the context of the main thread and internally
// the renderer uses a private thread to submit OpenGL calls. The surface
// pointer within the renderer is protected by a mutex that is locked for
// the duration of a frame. In this way, the renderer can be sure to have
// a valid surface for the duration of the frame for which it is submitting
// draw calls. Only when the frame finishes and the mutex is unlocked does
// this call to Renderer::setSurface continue. Thereby blocking the main
// thread from destroying the platform surface before we are ready.
m_renderer->setSurface(surface);
}
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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