void QSGWindowsRenderLoop::show(QQuickWindow *window)
{
RLDEBUG("show");
if (windowData(window) != 0)
return;
// This happens before the platform window is shown, but after
// it is created. Creating the GL context takes a lot of time
// (hundreds of milliseconds) and will prevent us from rendering
// the first frame in time for the initial show on screen.
// By preparing the GL context here, it is feasible (if the app
// is quick enough) to have a perfect first frame.
if (!m_gl) {
QSG_RENDER_TIMING_SAMPLE(time_start);
RLDEBUG(" - creating GL context");
m_gl = new QOpenGLContext();
m_gl->setFormat(window->requestedFormat());
if (QSGContext::sharedOpenGLContext())
m_gl->setShareContext(QSGContext::sharedOpenGLContext());
bool created = m_gl->create();
if (!created) {
qWarning("QtQuick: failed to create OpenGL context");
delete m_gl;
m_gl = 0;
return;
}
QSG_RENDER_TIMING_SAMPLE(time_created);
RLDEBUG(" - making current");
bool current = m_gl->makeCurrent(window);
RLDEBUG(" - initializing SG");
QSG_RENDER_TIMING_SAMPLE(time_current);
if (current)
m_rc->initialize(m_gl);
#ifndef QSG_NO_RENDER_TIMING
if (qsg_render_timing) {
qDebug("WindowsRenderLoop: GL=%d ms, makeCurrent=%d ms, SG=%d ms",
int((time_created - time_start)/1000000),
int((time_current - time_created)/1000000),
int((qsg_render_timer.nsecsElapsed() - time_current)/1000000));
}
if (QQmlProfilerService::enabled) {
QQmlProfilerService::sceneGraphFrame(
QQmlProfilerService::SceneGraphWindowsRenderShow,
time_created - time_start,
time_current - time_created,
qsg_render_timer.nsecsElapsed() - time_current);
}
#endif
}
WindowData data;
data.window = window;
data.pendingUpdate = false;
m_windows << data;
RLDEBUG(" - done with show");
}
void QSGWindowsRenderLoop::exposureChanged(QQuickWindow *window)
{
if (windowData(window) == 0)
return;
if (window->isExposed() && window->isVisible()) {
// Stop non-visual animation timer as we now have a window rendering
if (m_animationTimer && anyoneShowing()) {
RLDEBUG(" - stopping non-visual animation timer");
killTimer(m_animationTimer);
m_animationTimer = 0;
}
RLDEBUG("exposureChanged - exposed");
WindowData *wd = windowData(window);
wd->pendingUpdate = true;
// If we have a pending timer and we get an expose, we need to stop it.
// Otherwise we get two frames and two animation ticks in the same time-interval.
if (m_updateTimer) {
RLDEBUG(" - killing pending update timer");
killTimer(m_updateTimer);
m_updateTimer = 0;
}
render();
} else {
handleObscurity();
}
}
void QSGWindowsRenderLoop::handleObscurity()
{
RLDEBUG("handleObscurity");
// Potentially start the non-visual animation timer if nobody is rendering
if (m_animationDriver->isRunning() && !anyoneShowing() && !m_animationTimer) {
RLDEBUG(" - starting non-visual animation timer");
m_animationTimer = startTimer(m_vsyncDelta);
}
}
void QSGWindowsRenderLoop::stopped()
{
RLDEBUG("Animations stopped...");
if (m_animationTimer) {
RLDEBUG(" - stopping non-visual animation timer");
killTimer(m_animationTimer);
m_animationTimer = 0;
}
}
/*
* If no windows are showing, start ticking animations using a timer,
* otherwise, start rendering
*/
void QSGWindowsRenderLoop::started()
{
RLDEBUG("Animations started...");
if (!anyoneShowing()) {
if (m_animationTimer == 0) {
RLDEBUG(" - starting non-visual animation timer");
m_animationTimer = startTimer(m_vsyncDelta);
}
} else {
maybePostUpdateTimer();
}
}
QSGWindowsRenderLoop::QSGWindowsRenderLoop()
: m_gl(0)
, m_sg(QSGContext::createDefaultContext())
, m_updateTimer(0)
, m_animationTimer(0)
{
#ifdef QSG_RENDER_LOOP_DEBUG
qsg_debug_timer.start();
#endif
m_rc = new QSGRenderContext(m_sg);
m_animationDriver = m_sg->createAnimationDriver(m_sg);
m_animationDriver->install();
connect(m_animationDriver, SIGNAL(started()), this, SLOT(started()));
connect(m_animationDriver, SIGNAL(stopped()), this, SLOT(stopped()));
m_vsyncDelta = 1000 / QGuiApplication::primaryScreen()->refreshRate();
if (m_vsyncDelta <= 0)
m_vsyncDelta = 16;
RLDEBUG("Windows Render Loop created");
#ifndef QSG_NO_RENDER_TIMIMG
qsg_render_timer.start();
#endif
}
void QSGWindowsRenderLoop::maybePostUpdateTimer()
{
if (!m_updateTimer) {
RLDEBUG(" - posting event");
m_updateTimer = startTimer(m_vsyncDelta / 3);
}
}
void QSGWindowsRenderLoop::show(QQuickWindow *window)
{
RLDEBUG("show");
if (windowData(window) != 0)
return;
// This happens before the platform window is shown, but after
// it is created. Creating the GL context takes a lot of time
// (hundreds of milliseconds) and will prevent us from rendering
// the first frame in time for the initial show on screen.
// By preparing the GL context here, it is feasible (if the app
// is quick enough) to have a perfect first frame.
if (!m_gl) {
RLDEBUG(" - creating GL context");
m_gl = new QOpenGLContext();
m_gl->setFormat(window->requestedFormat());
m_gl->setScreen(window->screen());
if (qt_gl_global_share_context())
m_gl->setShareContext(qt_gl_global_share_context());
bool created = m_gl->create();
if (!created) {
const bool isEs = m_gl->isOpenGLES();
delete m_gl;
m_gl = 0;
handleContextCreationFailure(window, isEs);
return;
}
QQuickWindowPrivate::get(window)->fireOpenGLContextCreated(m_gl);
RLDEBUG(" - making current");
bool current = m_gl->makeCurrent(window);
RLDEBUG(" - initializing SG");
if (current)
m_rc->initialize(m_gl);
}
WindowData data;
data.window = window;
data.pendingUpdate = false;
m_windows << data;
RLDEBUG(" - done with show");
}
void QSGWindowsRenderLoop::maybeUpdate(QQuickWindow *window)
{
RLDEBUG("maybeUpdate");
WindowData *wd = windowData(window);
if (!wd || !anyoneShowing())
return;
wd->pendingUpdate = true;
maybePostUpdateTimer();
}
bool QSGWindowsRenderLoop::event(QEvent *event)
{
switch (event->type()) {
case QEvent::Timer: {
QTimerEvent *te = static_cast<QTimerEvent *>(event);
if (te->timerId() == m_animationTimer) {
RLDEBUG("event : animation tick while nothing is showing");
m_animationDriver->advance();
} else if (te->timerId() == m_updateTimer) {
RLDEBUG("event : update");
killTimer(m_updateTimer);
m_updateTimer = 0;
render();
}
return true; }
default:
break;
}
return QObject::event(event);
}
void QSGWindowsRenderLoop::windowDestroyed(QQuickWindow *window)
{
RLDEBUG("windowDestroyed");
hide(window);
// If this is the last tracked window, clean up SG and GL.
if (m_windows.size() == 0) {
QQuickWindowPrivate::get(window)->context->invalidate();
QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
delete m_gl;
m_gl = 0;
}
}
/*
* Go through all windows we control and render them in turn.
* Then tick animations if active.
*/
void QSGWindowsRenderLoop::render()
{
RLDEBUG("render");
bool rendered = false;
foreach (const WindowData &wd, m_windows) {
if (wd.pendingUpdate) {
const_cast<WindowData &>(wd).pendingUpdate = false;
renderWindow(wd.window);
rendered = true;
}
}
if (!rendered) {
RLDEBUG("no changes, sleep");
QThread::msleep(m_vsyncDelta);
}
if (m_animationDriver->isRunning()) {
RLDEBUG("advancing animations");
QSG_LOG_TIME_SAMPLE(time_start);
Q_QUICK_SG_PROFILE_START(QQuickProfiler::SceneGraphWindowsAnimations);
m_animationDriver->advance();
RLDEBUG("animations advanced");
qCDebug(QSG_LOG_TIME_RENDERLOOP,
"animations ticked in %dms",
int((qsg_render_timer.nsecsElapsed() - time_start)/1000000));
Q_QUICK_SG_PROFILE_END(QQuickProfiler::SceneGraphWindowsAnimations);
// It is not given that animations triggered another maybeUpdate()
// and thus another render pass, so to keep things running,
// make sure there is another frame pending.
maybePostUpdateTimer();
emit timeToIncubate();
}
}
void QSGWindowsRenderLoop::hide(QQuickWindow *window)
{
RLDEBUG("hide");
// The expose event is queued while hide is sent synchronously, so
// the value might not be updated yet. (plus that the windows plugin
// sends exposed=true when it goes to hidden, so it is doubly broken)
// The check is made here, after the removal from m_windows, so
// anyoneShowing will report the right value.
if (window->isExposed())
handleObscurity();
if (!m_gl)
return;
QQuickWindowPrivate::get(window)->fireAboutToStop();
}
/*
* Render the contents of this window. First polish, then sync, render
* then finally swap.
*
* Note: This render function does not implement aborting
* the render call when sync step results in no scene graph changes,
* like the threaded renderer does.
*/
void QSGWindowsRenderLoop::renderWindow(QQuickWindow *window)
{
RLDEBUG("renderWindow");
QQuickWindowPrivate *d = QQuickWindowPrivate::get(window);
if (!d->isRenderable())
return;
if (!m_gl->makeCurrent(window))
return;
QSG_RENDER_TIMING_SAMPLE(time_start);
RLDEBUG(" - polishing");
d->polishItems();
QSG_RENDER_TIMING_SAMPLE(time_polished);
RLDEBUG(" - syncing");
d->syncSceneGraph();
QSG_RENDER_TIMING_SAMPLE(time_synced);
RLDEBUG(" - rendering");
d->renderSceneGraph(window->size());
QSG_RENDER_TIMING_SAMPLE(time_rendered);
RLDEBUG(" - swapping");
m_gl->swapBuffers(window);
QSG_RENDER_TIMING_SAMPLE(time_swapped);
RLDEBUG(" - frameDone");
d->fireFrameSwapped();
#ifndef QSG_NO_RENDER_TIMING
if (qsg_render_timing) {
qDebug("WindowsRenderLoop(t=%d): window=%p, polish=%d ms, sync=%d ms, render=%d ms, swap=%d ms",
int(qsg_render_timer.elapsed()),
window,
int((time_polished - time_start)/1000000),
int((time_synced - time_polished)/1000000),
int((time_rendered - time_synced)/1000000),
int((time_swapped - time_rendered)/1000000));
}
if (QQmlProfilerService::enabled) {
QQmlProfilerService::sceneGraphFrame(
QQmlProfilerService::SceneGraphWindowsPolishFrame,
time_polished - time_start
);
QQmlProfilerService::sceneGraphFrame(
QQmlProfilerService::SceneGraphRenderLoopFrame,
time_synced - time_polished,
time_rendered - time_synced,
time_swapped - time_rendered
);
}
#endif
}
/*
* Go through all windows we control and render them in turn.
* Then tick animations if active.
*/
void QSGWindowsRenderLoop::render()
{
RLDEBUG("render");
foreach (const WindowData &wd, m_windows) {
if (wd.pendingUpdate) {
const_cast<WindowData &>(wd).pendingUpdate = false;
renderWindow(wd.window);
}
}
if (m_animationDriver->isRunning()) {
RLDEBUG("advancing animations");
QSG_RENDER_TIMING_SAMPLE(time_start);
m_animationDriver->advance();
RLDEBUG("animations advanced");
#ifndef QSG_NO_RENDER_TIMING
if (qsg_render_timing) {
qDebug("WindowsRenderLoop: animations=%d ms",
int((qsg_render_timer.nsecsElapsed() - time_start)/1000000));
}
if (QQmlProfilerService::Enabled) {
QQmlProfilerService::sceneGraphFrame(
QQmlProfilerService::SceneGraphWindowsAnimations,
qsg_render_timer.nsecsElapsed() - time_start);
}
#endif
// It is not given that animations triggered another maybeUpdate()
// and thus another render pass, so to keep things running,
// make sure there is another frame pending.
maybePostUpdateTimer();
emit timeToIncubate();
}
}
QImage QSGWindowsRenderLoop::grab(QQuickWindow *window)
{
RLDEBUG("grab");
if (!m_gl)
return QImage();
m_gl->makeCurrent(window);
QQuickWindowPrivate *d = QQuickWindowPrivate::get(window);
d->polishItems();
d->syncSceneGraph();
d->renderSceneGraph(window->size());
QImage image = qt_gl_read_framebuffer(window->size() * window->effectiveDevicePixelRatio(), false, false);
return image;
}
QImage QSGWindowsRenderLoop::grab(QQuickWindow *window)
{
RLDEBUG("grab");
if (!m_gl)
return QImage();
m_gl->makeCurrent(window);
QQuickWindowPrivate *d = QQuickWindowPrivate::get(window);
d->polishItems();
d->syncSceneGraph();
d->renderSceneGraph(window->size());
bool alpha = window->format().alphaBufferSize() > 0 && window->color().alpha() != 255;
QImage image = qt_gl_read_framebuffer(window->size() * window->effectiveDevicePixelRatio(), alpha, alpha);
return image;
}
void QSGWindowsRenderLoop::windowDestroyed(QQuickWindow *window)
{
RLDEBUG("windowDestroyed");
for (int i=0; i<m_windows.size(); ++i) {
if (m_windows.at(i).window == window) {
m_windows.removeAt(i);
break;
}
}
hide(window);
QQuickWindowPrivate *d = QQuickWindowPrivate::get(window);
bool current = false;
QScopedPointer<QOffscreenSurface> offscreenSurface;
if (m_gl) {
QSurface *surface = window;
// There may be no platform window if the window got closed.
if (!window->handle()) {
offscreenSurface.reset(new QOffscreenSurface);
offscreenSurface->setFormat(m_gl->format());
offscreenSurface->create();
surface = offscreenSurface.data();
}
current = m_gl->makeCurrent(surface);
}
if (Q_UNLIKELY(!current))
qCDebug(QSG_LOG_RENDERLOOP) << "cleanup without an OpenGL context";
QQuickShaderEffectMaterial::cleanupMaterialCache();
d->cleanupNodesOnShutdown();
if (m_windows.size() == 0) {
d->context->invalidate();
delete m_gl;
m_gl = 0;
} else if (m_gl && current) {
m_gl->doneCurrent();
}
delete d->animationController;
}
QSGWindowsRenderLoop::QSGWindowsRenderLoop()
: m_gl(0)
, m_sg(QSGContext::createDefaultContext())
, m_updateTimer(0)
, m_animationTimer(0)
{
m_rc = m_sg->createRenderContext();
m_animationDriver = m_sg->createAnimationDriver(m_sg);
m_animationDriver->install();
connect(m_animationDriver, SIGNAL(started()), this, SLOT(started()));
connect(m_animationDriver, SIGNAL(stopped()), this, SLOT(stopped()));
m_vsyncDelta = 1000 / QGuiApplication::primaryScreen()->refreshRate();
if (m_vsyncDelta <= 0)
m_vsyncDelta = 16;
RLDEBUG("Windows Render Loop created");
qsg_render_timer.start();
}
void QSGWindowsRenderLoop::hide(QQuickWindow *window)
{
RLDEBUG("hide");
for (int i=0; i<m_windows.size(); ++i) {
if (m_windows.at(i).window == window) {
m_windows.removeAt(i);
break;
}
}
// The expose event is queued while hide is sent synchronously, so
// the value might not be updated yet. (plus that the windows plugin
// sends exposed=true when it goes to hidden, so it is doubly broken)
// The check is made here, after the removal from m_windows, so
// anyoneShowing will report the right value.
if (window->isExposed())
handleObscurity();
if (!m_gl)
return;
QQuickWindowPrivate *cd = QQuickWindowPrivate::get(window);
m_gl->makeCurrent(window);
cd->cleanupNodesOnShutdown();
// If this is the last tracked window, check for persistent SG and GL and
// potentially clean up.
if (m_windows.size() == 0) {
if (!cd->persistentSceneGraph) {
QQuickWindowPrivate::get(window)->context->invalidate();
QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
if (!cd->persistentGLContext) {
delete m_gl;
m_gl = 0;
}
}
}
}
/*
* Render the contents of this window. First polish, then sync, render
* then finally swap.
*
* Note: This render function does not implement aborting
* the render call when sync step results in no scene graph changes,
* like the threaded renderer does.
*/
void QSGWindowsRenderLoop::renderWindow(QQuickWindow *window)
{
RLDEBUG("renderWindow");
QQuickWindowPrivate *d = QQuickWindowPrivate::get(window);
if (!d->isRenderable())
return;
if (!m_gl->makeCurrent(window)) {
// Check for context loss.
if (!m_gl->isValid()) {
d->cleanupNodesOnShutdown();
m_rc->invalidate();
if (m_gl->create() && m_gl->makeCurrent(window))
m_rc->initialize(m_gl);
else
return;
}
}
d->flushDelayedTouchEvent();
// Event delivery or processing has caused the window to stop rendering.
if (!windowData(window))
return;
QSG_LOG_TIME_SAMPLE(time_start);
Q_QUICK_SG_PROFILE_START(QQuickProfiler::SceneGraphPolishFrame);
RLDEBUG(" - polishing");
d->polishItems();
QSG_LOG_TIME_SAMPLE(time_polished);
Q_QUICK_SG_PROFILE_SWITCH(QQuickProfiler::SceneGraphPolishFrame,
QQuickProfiler::SceneGraphRenderLoopFrame);
emit window->afterAnimating();
RLDEBUG(" - syncing");
d->syncSceneGraph();
QSG_RENDER_TIMING_SAMPLE(QQuickProfiler::SceneGraphRenderLoopFrame, time_synced);
RLDEBUG(" - rendering");
d->renderSceneGraph(window->size());
QSG_RENDER_TIMING_SAMPLE(QQuickProfiler::SceneGraphRenderLoopFrame, time_rendered);
RLDEBUG(" - swapping");
if (!d->customRenderStage || !d->customRenderStage->swap())
m_gl->swapBuffers(window);
QSG_RENDER_TIMING_SAMPLE(QQuickProfiler::SceneGraphRenderLoopFrame, time_swapped);
RLDEBUG(" - frameDone");
d->fireFrameSwapped();
qCDebug(QSG_LOG_TIME_RENDERLOOP()).nospace()
<< "Frame rendered with 'windows' renderloop in: " << (time_swapped - time_start) / 1000000 << "ms"
<< ", polish=" << (time_polished - time_start) / 1000000
<< ", sync=" << (time_synced - time_polished) / 1000000
<< ", render=" << (time_rendered - time_synced) / 1000000
<< ", swap=" << (time_swapped - time_rendered) / 1000000
<< " - " << window;
Q_QUICK_SG_PROFILE_REPORT(QQuickProfiler::SceneGraphRenderLoopFrame);
}
void QSGWindowsRenderLoop::update(QQuickWindow *window)
{
RLDEBUG("update");
maybeUpdate(window);
}