software: Add support for QSGRenderNode

Have to change getResource() a bit since it turns out it is not suitable
currently for backends that do not have a per-window rendercontext and do
not implement the interface on the rendercontext. Pass in the window to
make sure it can always figure out which window we want the resources for.
(we do not want rendererInterface() to return window-specific instances
created on the fly, with ownership issues, so stick with the simple model
where backends implement the interface on one of their existing classes)

To support clipping, QSGRenderNode::RenderState is extended accordingly.
Also updated the docs since some claims in the rendernode docs are not true
since Qt 5.3.

Change-Id: I34779c83926f5231b888fcab7131e873ae97964f
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp b/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp
index d45a0ea75d..bee2015007 100644
--- a/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp
+++ b/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp
@@ -2768,6 +2768,7 @@ struct RenderNodeState : public QSGRenderNode::RenderState
     bool scissorEnabled() const override { return m_scissorEnabled; }
     int stencilValue() const override { return m_stencilValue; }
     bool stencilEnabled() const override { return m_stencilEnabled; }
+    const QRegion *clipRegion() const override { return nullptr; }
 
     const QMatrix4x4 *m_projectionMatrix;
     QRect m_scissorRect;