QSGContext::QSGContext(QObject *parent) :
QObject(*(new QSGContextPrivate), parent)
{
Q_D(QSGContext);
if (Q_UNLIKELY(!qEnvironmentVariableIsEmpty("QSG_DISTANCEFIELD_ANTIALIASING"))) {
const QByteArray mode = qgetenv("QSG_DISTANCEFIELD_ANTIALIASING");
d->distanceFieldAntialiasingDecided = true;
if (mode == "subpixel")
d->distanceFieldAntialiasing = QSGGlyphNode::HighQualitySubPixelAntialiasing;
else if (mode == "subpixel-lowq")
d->distanceFieldAntialiasing = QSGGlyphNode::LowQualitySubPixelAntialiasing;
else if (mode == "gray")
d->distanceFieldAntialiasing = QSGGlyphNode::GrayAntialiasing;
}
// Adds compatibility with Qt 5.3 and earlier's QSG_RENDER_TIMING
if (qEnvironmentVariableIsSet("QSG_RENDER_TIMING")) {
const_cast<QLoggingCategory &>(QSG_LOG_TIME_GLYPH()).setEnabled(QtDebugMsg, true);
const_cast<QLoggingCategory &>(QSG_LOG_TIME_TEXTURE()).setEnabled(QtDebugMsg, true);
const_cast<QLoggingCategory &>(QSG_LOG_TIME_RENDERER()).setEnabled(QtDebugMsg, true);
const_cast<QLoggingCategory &>(QSG_LOG_TIME_RENDERLOOP()).setEnabled(QtDebugMsg, true);
const_cast<QLoggingCategory &>(QSG_LOG_TIME_COMPILATION()).setEnabled(QtDebugMsg, true);
}
}
/*
* 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);
}
