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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of Qt Quick 2d Renderer module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE$
** 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.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "renderloop.h"
#include "context.h"
#include <private/qquickwindow_p.h>
#include <QElapsedTimer>
#include <private/qquickprofiler_p.h>
#include <QCoreApplication>
RenderLoop::RenderLoop()
: eventPending(false)
{
sg = QSGContext::createDefaultContext();
rc = sg->createRenderContext();
}
RenderLoop::~RenderLoop()
{
delete rc;
delete sg;
}
void RenderLoop::show(QQuickWindow *window)
{
WindowData data;
data.updatePending = false;
data.grabOnly = false;
m_windows[window] = data;
maybeUpdate(window);
}
void RenderLoop::hide(QQuickWindow *window)
{
if (!m_windows.contains(window))
return;
m_windows.remove(window);
QQuickWindowPrivate *cd = QQuickWindowPrivate::get(window);
cd->fireAboutToStop();
cd->cleanupNodesOnShutdown();
if (m_windows.size() == 0) {
if (!cd->persistentSceneGraph) {
rc->invalidate();
QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
}
}
}
void RenderLoop::windowDestroyed(QQuickWindow *window)
{
hide(window);
if (m_windows.size() == 0) {
rc->invalidate();
QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
}
}
void RenderLoop::renderWindow(QQuickWindow *window)
{
QQuickWindowPrivate *cd = QQuickWindowPrivate::get(window);
if (!cd->isRenderable() || !m_windows.contains(window))
return;
WindowData &data = const_cast<WindowData &>(m_windows[window]);
// ### create QPainter and set up pointer to current window/painter
SoftwareContext::RenderContext *ctx = static_cast<SoftwareContext::RenderContext*>(cd->context);
ctx->currentWindow = window;
ctx->initializeIfNeeded();
bool alsoSwap = data.updatePending;
data.updatePending = false;
if (!data.grabOnly) {
cd->flushDelayedTouchEvent();
// 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() || QQuickProfiler::featuresEnabled;
if (profileFrames)
renderTimer.start();
cd->polishItems();
if (profileFrames) {
polishTime = renderTimer.nsecsElapsed();
}
emit window->afterAnimating();
cd->syncSceneGraph();
if (profileFrames)
syncTime = renderTimer.nsecsElapsed();
cd->renderSceneGraph(window->size());
if (profileFrames)
renderTime = renderTimer.nsecsElapsed();
if (data.grabOnly) {
// #### grabContent = qt_gl_read_framebuffer(window->size() * window->devicePixelRatio(), false, false);
data.grabOnly = false;
}
if (alsoSwap && window->isVisible()) {
// ### gl->swapBuffers(window);
cd->fireFrameSwapped();
}
qint64 swapTime = 0;
if (profileFrames)
swapTime = renderTimer.nsecsElapsed();
if (QSG_RASTER_LOG_TIME_RENDERLOOP().isDebugEnabled()) {
static QTime lastFrameTime = QTime::currentTime();
qCDebug(QSG_RASTER_LOG_TIME_RENDERLOOP,
"Frame rendered with 'basic' 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 RenderLoop::exposureChanged(QQuickWindow *window)
{
if (window->isExposed()) {
m_windows[window].updatePending = true;
renderWindow(window);
}
}
QImage RenderLoop::grab(QQuickWindow *window)
{
if (!m_windows.contains(window))
return QImage();
m_windows[window].grabOnly = true;
renderWindow(window);
QImage grabbed = grabContent;
grabContent = QImage();
return grabbed;
}
void RenderLoop::maybeUpdate(QQuickWindow *window)
{
if (!m_windows.contains(window))
return;
m_windows[window].updatePending = true;
if (!eventPending) {
const int exhaust_delay = 5;
m_update_timer = startTimer(exhaust_delay, Qt::PreciseTimer);
eventPending = true;
}
}
QSurface::SurfaceType RenderLoop::windowSurfaceType() const
{
return QSurface::RasterSurface;
}
QSGContext *RenderLoop::sceneGraphContext() const
{
return sg;
}
bool RenderLoop::event(QEvent *e)
{
if (e->type() == QEvent::Timer) {
eventPending = false;
killTimer(m_update_timer);
m_update_timer = 0;
for (QHash<QQuickWindow *, WindowData>::const_iterator it = m_windows.constBegin();
it != m_windows.constEnd(); ++it) {
const WindowData &data = it.value();
if (data.updatePending)
renderWindow(it.key());
}
return true;
}
return QObject::event(e);
}
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