path: root/src
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authorLaszlo Agocs <>2013-11-26 13:09:42 +0100
committerThe Qt Project <>2013-11-27 09:38:22 +0100
commit94f1b85cf7e3f8983779a09b55cd22a47ab9203a (patch)
tree7d5de812894b7dd5520f1b75308d96f77cc2a5f1 /src
parent09466a942e7b940c64b7b4bd64a0069247961501 (diff)
Check the thread in QOffscreenSurface
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 <> Reviewed-by: Gunnar Sletta <>
Diffstat (limited to 'src')
1 files changed, 2 insertions, 0 deletions
diff --git a/src/gui/kernel/qoffscreensurface.cpp b/src/gui/kernel/qoffscreensurface.cpp
index e2306050dd..ce913a98af 100644
--- a/src/gui/kernel/qoffscreensurface.cpp
+++ b/src/gui/kernel/qoffscreensurface.cpp
@@ -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);