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, 5 insertions, 3 deletions

diff --git a/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp b/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp
index bee2015007..49bbbf0ba8 100644
--- a/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp
+++ b/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp
@@ -1033,11 +1033,13 @@ void Renderer::nodeWasAdded(QSGNode *node, Node *shadowParent)
         m_rebuild |= FullRebuild;
 
     } else if (node->type() == QSGNode::RenderNodeType) {
-        RenderNodeElement *e = new RenderNodeElement(static_cast<QSGRenderNode *>(node));
+        QSGRenderNode *rn = static_cast<QSGRenderNode *>(node);
+        RenderNodeElement *e = new RenderNodeElement(rn);
         snode->data = e;
-        Q_ASSERT(!m_renderNodeElements.contains(static_cast<QSGRenderNode *>(node)));
+        Q_ASSERT(!m_renderNodeElements.contains(rn));
         m_renderNodeElements.insert(e->renderNode, e);
-        m_useDepthBuffer = false;
+        if (!rn->flags().testFlag(QSGRenderNode::DepthAwareRendering))
+            m_useDepthBuffer = false;
         m_rebuild |= FullRebuild;
     }