Only update View3D rendertarget when it's visible in the UI. Closes #1228.

Source/Urho3D/UI/View3D.cpp

@@ -25,6 +25,7 @@
 #include "../Core/Context.h"
 #include "../Graphics/Camera.h"
 #include "../Graphics/Graphics.h"
+#include "../Graphics/GraphicsEvents.h"
 #include "../Graphics/Octree.h"
 #include "../Graphics/Texture2D.h"
 #include "../Graphics/Zone.h"
@@ -47,6 +48,8 @@ View3D::View3D(Context* context) :
     renderTexture_ = new Texture2D(context_);
     depthTexture_ = new Texture2D(context_);
     viewport_ = new Viewport(context_);
+
+    SubscribeToEvent(E_RENDERSURFACEUPDATE, URHO3D_HANDLER(View3D, HandleRenderSurfaceUpdate));
 }
 
 View3D::~View3D()
@@ -76,7 +79,7 @@ void View3D::OnResize()
         depthTexture_->SetSize(width, height, Graphics::GetDepthStencilFormat(), TEXTURE_DEPTHSTENCIL);
         RenderSurface* surface = renderTexture_->GetRenderSurface();
         surface->SetViewport(0, viewport_);
-        surface->SetUpdateMode(autoUpdate_ ? SURFACE_UPDATEALWAYS : SURFACE_MANUALUPDATE);
+        surface->SetUpdateMode(SURFACE_MANUALUPDATE);
         surface->SetLinkedDepthStencil(depthTexture_->GetRenderSurface());
 
         SetTexture(renderTexture_);
@@ -111,23 +114,14 @@ void View3D::SetFormat(unsigned format)
 
 void View3D::SetAutoUpdate(bool enable)
 {
-    if (enable != autoUpdate_)
-    {
-        autoUpdate_ = enable;
-        RenderSurface* surface = renderTexture_->GetRenderSurface();
-        if (surface)
-            surface->SetUpdateMode(autoUpdate_ ? SURFACE_UPDATEALWAYS : SURFACE_MANUALUPDATE);
-    }
+    autoUpdate_ = enable;
 }
 
 void View3D::QueueUpdate()
 {
-    if (!autoUpdate_)
-    {
-        RenderSurface* surface = renderTexture_->GetRenderSurface();
-        if (surface)
-            surface->QueueUpdate();
-    }
+    RenderSurface* surface = renderTexture_->GetRenderSurface();
+    if (surface)
+        surface->QueueUpdate();
 }
 
 Scene* View3D::GetScene() const
@@ -171,4 +165,10 @@ void View3D::ResetScene()
         scene_ = 0;
 }
 
+void View3D::HandleRenderSurfaceUpdate(StringHash eventType, VariantMap& eventData)
+{
+    if (autoUpdate_ && IsVisibleEffective())
+        QueueUpdate();
+}
+
 }

Source/Urho3D/UI/View3D.h

@@ -78,6 +78,8 @@ public:
 private:
     /// Reset scene.
     void ResetScene();
+    /// Handle render surface update event. Queue the texture for update in case the View3D is visible and automatic update is enabled.
+    void HandleRenderSurfaceUpdate(StringHash eventType, VariantMap& eventData);
 
     /// Renderable texture.
     SharedPtr<Texture2D> renderTexture_;