Add optional flags and rect to QSGRenderNode

Having rendernodes triggering fullscreen updates with the software backend
is not ideal. Therefore, introduce the option of reporting that the rendernode
is well-behaving, meaning it only writes inside the reported bounding rectangle.

Similarly, the OpenGL batch renderer can keep using the depth buffer when the
rendernode is known to behave like the renderer expects.

Change-Id: I6acc434432c2504776f26e8917b5434b44be293d
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/examples/quick/scenegraph/rendernode/openglrenderer.h b/examples/quick/scenegraph/rendernode/openglrenderer.h
index 28d528e617..1ee6350218 100644
--- a/examples/quick/scenegraph/rendernode/openglrenderer.h
+++ b/examples/quick/scenegraph/rendernode/openglrenderer.h
@@ -58,6 +58,8 @@ public:
     void render(const RenderState *state) override;
     void releaseResources() override;
     StateFlags changedStates() const override;
+    RenderingFlags flags() const override;
+    QRectF rect() const override;
 
 private:
     void init();