Merge lp:~azzar1/unity/fix-1059562-6.0 into lp:unity/6.0

[Andrea Azzarone]

Fix rendering flaw in search entry. (LP: #1059562)

== Problem ==
[Dash] Rendering flaw of the dash search entry.

== Fix ==
Clear area below search entry if necessary.

---

The 6.0 version of https://code.launchpad.net/~andyrock/unity/fix-1059562/+merge/127272

[Neil J. Patel (njpatel)]

review: Approve

=== modified file 'unity-shared/SearchBar.cpp'
--- unity-shared/SearchBar.cpp	2012-09-28 13:29:51 +0000
+++ unity-shared/SearchBar.cpp	2012-10-01 13:24:32 +0000
@@ -363,6 +363,17 @@
 
   graphics_engine.PushClippingRectangle(base);
 
+  if (RedirectedAncestor())
+  {
+    unsigned int alpha = 0, src = 0, dest = 0;
+    graphics_engine.GetRenderStates().GetBlend(alpha, src, dest);
+    // This is necessary when doing redirected rendering.
+    // Clean the area below this view before drawing anything.
+    graphics_engine.GetRenderStates().SetBlend(false);
+    graphics_engine.QRP_Color(base.x, base.y, last_width_, last_height_, nux::Color(0.0f, 0.0f, 0.0f, 0.0f));
+    graphics_engine.GetRenderStates().SetBlend(alpha, src, dest);
+  }
+
   bg_layer_->SetGeometry(nux::Geometry(base.x, base.y, last_width_, last_height_));
   nux::GetPainter().RenderSinglePaintLayer(graphics_engine,
                                            bg_layer_->GetGeometry(),