Check for Threaded Pixmaps capability for threaded renderer

By default we used the threaded renderer, but this will
only work if the platform has the capability to render to
QPixmaps from multiple threads.  Now if we don't have
the Threaded Pixmaps capability we use the non-threaded
render loop.

Change-Id: I5090e874d0bbdd1e54561ea3583a5a17bbf50061
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/plugins/scenegraph/softwarecontext/pluginmain.cpp b/src/plugins/scenegraph/softwarecontext/pluginmain.cpp
index afb91a8ea2..a928cb6e5e 100644
--- a/src/plugins/scenegraph/softwarecontext/pluginmain.cpp
+++ b/src/plugins/scenegraph/softwarecontext/pluginmain.cpp
@@ -24,6 +24,9 @@
 #include "renderloop.h"
 #include "threadedrenderloop.h"
 
+#include <private/qguiapplication_p.h>
+#include <qpa/qplatformintegration.h>
+
 ContextPlugin::ContextPlugin(QObject *parent)
     : QSGContextPlugin(parent)
 {
@@ -43,8 +46,10 @@ QSGContext *ContextPlugin::create(const QString &) const
 
 QSGRenderLoop *ContextPlugin::createWindowManager()
 {
-    if (qgetenv("QSG_RENDER_LOOP") == QByteArrayLiteral("basic"))
+    if (!QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ThreadedPixmaps) ||
+        qgetenv("QSG_RENDER_LOOP") == QByteArrayLiteral("basic"))
         return new RenderLoop();
+
     return new ThreadedRenderLoop();
 }