SoftwareLayer::grab must call QSGRenderer::renderScene to work correctly

If QSGRenderer::renderScene is not called by SoftwareLayer then any
updates in the scenegraph will not be reflected in that layer.  This is
the "live" but not "recursive" situation.

Change-Id: If55cc71b3932e283855e3a1f9ff1bca5e07f4498
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/plugins/scenegraph/softwarecontext/context.cpp b/src/plugins/scenegraph/softwarecontext/context.cpp
index 345728f833..42780209c2 100644
--- a/src/plugins/scenegraph/softwarecontext/context.cpp
+++ b/src/plugins/scenegraph/softwarecontext/context.cpp
@@ -104,12 +104,17 @@ PixmapRenderer::PixmapRenderer(QSGRenderContext *context)
 
 void PixmapRenderer::renderScene(GLuint)
 {
-    Q_UNREACHABLE();
+    class B : public QSGBindable
+    {
+    public:
+        void bind() const { }
+    } bindable;
+    QSGRenderer::renderScene(bindable);
 }
 
 void PixmapRenderer::render()
 {
-    Q_UNREACHABLE();
+
 }
 
 void PixmapRenderer::render(QPixmap *target)