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Check the thread in QOffscreenSurface

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The QWindow-based fallback will not work when the QOffscreenSurface is
created outside the main thread. Show a warning in this case.

Note that it is fine to use the QOffscreenSurface instance in another
thread. It is just the creation that must happen on the main thread.

Change-Id: If80da39e610813755b9ba2f6831b187b258b8266
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
This commit is contained in:
Laszlo Agocs 2013-11-26 13:09:42 +01:00 committed by The Qt Project
parent 09466a942e
commit 94f1b85cf7
1 changed files with 2 additions and 0 deletions
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2
src/gui/kernel/qoffscreensurface.cpp
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@ -160,6 +160,8 @@ void QOffscreenSurface::create()
d->platformOffscreenSurface = QGuiApplicationPrivate::platformIntegration()->createPlatformOffscreenSurface(this);
// No platform offscreen surface, fallback to an invisible window
if (!d->platformOffscreenSurface) {
if (QThread::currentThread() != qGuiApp->thread())
qWarning("Attempting to create QWindow-based QOffscreenSurface outside the gui thread. Expect failures.");
d->offscreenWindow = new QWindow(d->screen);
d->offscreenWindow->setSurfaceType(QWindow::OpenGLSurface);
d->offscreenWindow->setFormat(d->requestedFormat);