Make sure texture factories are delete before libraries are unloaded.

Because scene graph adaptations and custom implementations can
instantiate QQuickTextureFactories, we need to make sure that
their destructors are called before their libraries are unloaded
to avoid crashes on shutdown.

Change-Id: I17d38e2909aabcb4ea7bf4eecc29df86c8479fdb
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/quick/items/qquickwindow.cpp b/src/quick/items/qquickwindow.cpp
index 04539800a5..9ae2f5b20d 100644
--- a/src/quick/items/qquickwindow.cpp
+++ b/src/quick/items/qquickwindow.cpp
@@ -1127,6 +1127,13 @@ QQuickWindow::~QQuickWindow()
     qDeleteAll(d->afterSwapJobs);
     d->afterSwapJobs.clear();
     d->renderJobMutex.unlock();
+
+    // It is important that the pixmap cache is cleaned up during shutdown.
+    // Besides playing nice, this also solves a practical problem that
+    // QQuickTextureFactory implementations in other libraries need
+    // have their destructors loaded while they the library is still
+    // loaded into memory.
+    QQuickPixmap::purgeCache();
 }
 
 /*!