Apply Premultiplied Alpha for ClearColor of 32bit window.

Change-Id: I06a71c809d61063a353996374093220beda05c2b
Signed-off-by: Seungho Baek <sbsh.baek@samsung.com>

2 files changed, 37 insertions, 1 deletions

diff --git a/dali/internal/window-system/common/window-impl.cpp b/dali/internal/window-system/common/window-impl.cpp
index b67e6475b..c08226f57 100644
--- a/dali/internal/window-system/common/window-impl.cpp
+++ b/dali/internal/window-system/common/window-impl.cpp
@@ -883,9 +883,33 @@ Dali::Layer Window::GetRootLayer() const
   return mScene.GetRootLayer();
 }
 
+void Window::SetBackgroundColor(const Vector4& color)
+{
+  mBackgroundColor = color;
+  if(mIsTransparent)
+  {
+    Vector4 backgroundColor = color;
+    backgroundColor.r *= backgroundColor.a;
+    backgroundColor.g *= backgroundColor.a;
+    backgroundColor.b *= backgroundColor.a;
+    SceneHolder::SetBackgroundColor(backgroundColor);
+  }
+  else
+  {
+    SceneHolder::SetBackgroundColor(color);
+  }
+}
+
+Vector4 Window::GetBackgroundColor() const
+{
+  return mBackgroundColor;
+}
+
 void Window::SetTransparency(bool transparent)
 {
-  mWindowSurface->SetTransparency(transparent);
+  mIsTransparent = transparent;
+  mWindowSurface->SetTransparency(mIsTransparent);
+  SceneHolder::SetBackgroundColor(mBackgroundColor);
 }
 
 bool Window::GrabKey(Dali::KEY key, KeyGrab::KeyGrabMode grabMode)
diff --git a/dali/internal/window-system/common/window-impl.h b/dali/internal/window-system/common/window-impl.h
index af90626d1..857bd4d3a 100644
--- a/dali/internal/window-system/common/window-impl.h
+++ b/dali/internal/window-system/common/window-impl.h
@@ -359,6 +359,16 @@ public:
   Dali::Layer GetRootLayer() const;
 
   /**
+   * @copydoc Dali::Window::SetBackgroundColor
+   */
+  void SetBackgroundColor(const Dali::Vector4& color);
+
+  /**
+   * @copydoc Dali::Window::GetBackgroundColor
+   */
+  Vector4 GetBackgroundColor() const;
+
+  /**
    * @copydoc Dali::Window::SetTransparency()
    */
   void SetTransparency(bool transparent);
@@ -1005,6 +1015,8 @@ private:
 
   Dali::KeyEvent mLastKeyEvent;
 
+  Vector4 mBackgroundColor;
+
   bool mIsTransparent : 1;
   bool mIsFocusAcceptable : 1;
   bool mIconified : 1;