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qtdeclarative/src/quick/scenegraph/adaptations/software/qsgsoftwarerenderloop.cpp

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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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qsgsoftwarerenderloop_p.h"
#include "qsgsoftwarecontext_p.h"
#include <QtCore/QCoreApplication>
#include <private/qquickwindow_p.h>
#include <QElapsedTimer>
#include <private/qquickprofiler_p.h>
#include <private/qsgsoftwarerenderer_p.h>
#include <qpa/qplatformbackingstore.h>
#include <QtGui/QBackingStore>
QT_BEGIN_NAMESPACE
QSGSoftwareRenderLoop::QSGSoftwareRenderLoop()
{
sg = new QSGSoftwareContext();
rc = sg->createRenderContext();
}
QSGSoftwareRenderLoop::~QSGSoftwareRenderLoop()
{
delete rc;
delete sg;
}
void QSGSoftwareRenderLoop::show(QQuickWindow *window)
{
WindowData data;
data.updatePending = false;
data.grabOnly = false;
m_windows[window] = data;
if (m_backingStores[window] == nullptr) {
m_backingStores[window] = new QBackingStore(window);
}
maybeUpdate(window);
}
void QSGSoftwareRenderLoop::hide(QQuickWindow *window)
{
QQuickWindowPrivate *cd = QQuickWindowPrivate::get(window);
cd->fireAboutToStop();
}
void QSGSoftwareRenderLoop::windowDestroyed(QQuickWindow *window)
{
m_windows.remove(window);
delete m_backingStores[window];
m_backingStores.remove(window);
hide(window);
QQuickWindowPrivate *d = QQuickWindowPrivate::get(window);
d->cleanupNodesOnShutdown();
if (m_windows.size() == 0) {
rc->invalidate();
QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
}
}
void QSGSoftwareRenderLoop::renderWindow(QQuickWindow *window, bool isNewExpose)
{
QQuickWindowPrivate *cd = QQuickWindowPrivate::get(window);
if (!m_windows.contains(window))
return;
WindowData &data = const_cast<WindowData &>(m_windows[window]);
//If were not in grabOnly mode, dont render a non-renderable window
if (!data.grabOnly && !cd->isRenderable())
return;
//Resize the backing store if necessary
if (m_backingStores[window]->size() != window->size()) {
m_backingStores[window]->resize(window->size());
}
// ### create QPainter and set up pointer to current window/painter
QSGSoftwareRenderContext *ctx = static_cast<QSGSoftwareRenderContext*>(cd->context);
ctx->initializeIfNeeded();
bool alsoSwap = data.updatePending;
data.updatePending = false;
if (!data.grabOnly) {
cd->flushFrameSynchronousEvents();
// Event delivery/processing triggered the window to be deleted or stop rendering.
if (!m_windows.contains(window))
return;
}
QElapsedTimer renderTimer;
qint64 renderTime = 0, syncTime = 0, polishTime = 0;
bool profileFrames = QSG_RASTER_LOG_TIME_RENDERLOOP().isDebugEnabled();
if (profileFrames)
renderTimer.start();
Q_QUICK_SG_PROFILE_START(QQuickProfiler::SceneGraphPolishFrame);
cd->polishItems();
if (profileFrames)
polishTime = renderTimer.nsecsElapsed();
Q_QUICK_SG_PROFILE_SWITCH(QQuickProfiler::SceneGraphPolishFrame,
QQuickProfiler::SceneGraphRenderLoopFrame,
QQuickProfiler::SceneGraphPolishPolish);
emit window->afterAnimating();
cd->syncSceneGraph();
if (profileFrames)
syncTime = renderTimer.nsecsElapsed();
Q_QUICK_SG_PROFILE_RECORD(QQuickProfiler::SceneGraphRenderLoopFrame,
QQuickProfiler::SceneGraphRenderLoopSync);
//Tell the renderer about the windows backing store
auto softwareRenderer = static_cast<QSGSoftwareRenderer*>(cd->renderer);
if (softwareRenderer)
softwareRenderer->setBackingStore(m_backingStores[window]);
cd->renderSceneGraph(window->size());
if (profileFrames)
renderTime = renderTimer.nsecsElapsed();
Q_QUICK_SG_PROFILE_RECORD(QQuickProfiler::SceneGraphRenderLoopFrame,
QQuickProfiler::SceneGraphRenderLoopRender);
if (data.grabOnly) {
grabContent = m_backingStores[window]->handle()->toImage();
data.grabOnly = false;
}
if (alsoSwap && window->isVisible()) {
//Flush backingstore to window
if (!isNewExpose)
m_backingStores[window]->flush(softwareRenderer->flushRegion());
else
m_backingStores[window]->flush(QRegion(QRect(QPoint(0,0), window->size())));
cd->fireFrameSwapped();
}
qint64 swapTime = 0;
if (profileFrames)
swapTime = renderTimer.nsecsElapsed();
Q_QUICK_SG_PROFILE_END(QQuickProfiler::SceneGraphRenderLoopFrame,
QQuickProfiler::SceneGraphRenderLoopSwap);
if (QSG_RASTER_LOG_TIME_RENDERLOOP().isDebugEnabled()) {
static QTime lastFrameTime = QTime::currentTime();
qCDebug(QSG_RASTER_LOG_TIME_RENDERLOOP,
"Frame rendered with 'software' renderloop in %dms, polish=%d, sync=%d, render=%d, swap=%d, frameDelta=%d",
int(swapTime / 1000000),
int(polishTime / 1000000),
int((syncTime - polishTime) / 1000000),
int((renderTime - syncTime) / 1000000),
int((swapTime - renderTime) / 10000000),
int(lastFrameTime.msecsTo(QTime::currentTime())));
lastFrameTime = QTime::currentTime();
}
// Might have been set during syncSceneGraph()
if (data.updatePending)
maybeUpdate(window);
}
void QSGSoftwareRenderLoop::exposureChanged(QQuickWindow *window)
{
if (window->isExposed()) {
m_windows[window].updatePending = true;
renderWindow(window, true);
}
}
QImage QSGSoftwareRenderLoop::grab(QQuickWindow *window)
{
//If the window was never shown, create a new backing store
if (!m_backingStores.contains(window)) {
m_backingStores[window] = new QBackingStore(window);
// Call create on window to make sure platform window is created
window->create();
}
//If there is no WindowData, add one
if (!m_windows.contains(window)) {
WindowData data;
data.updatePending = false;
m_windows[window] = data;
}
m_windows[window].grabOnly = true;
renderWindow(window);
QImage grabbed = grabContent;
grabbed.detach();
grabContent = QImage();
return grabbed;
}
void QSGSoftwareRenderLoop::maybeUpdate(QQuickWindow *window)
{
if (!m_windows.contains(window))
return;
m_windows[window].updatePending = true;
window->requestUpdate();
}
QSurface::SurfaceType QSGSoftwareRenderLoop::windowSurfaceType() const
{
return QSurface::RasterSurface;
}
QSGContext *QSGSoftwareRenderLoop::sceneGraphContext() const
{
return sg;
}
void QSGSoftwareRenderLoop::handleUpdateRequest(QQuickWindow *window)
{
renderWindow(window);
}
QT_END_NAMESPACE
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