Pre-multiplied Alpha support for ImageView

[platform/core/uifw/dali-toolkit.git] / dali-toolkit / internal / controls / image-view / image-view-impl.cpp

diff --git a/dali-toolkit/internal/controls/image-view/image-view-impl.cpp b/dali-toolkit/internal/controls/image-view/image-view-impl.cpp
index aaab3b6..aecb859 100644 (file)
--- a/dali-toolkit/internal/controls/image-view/image-view-impl.cpp
+++ b/dali-toolkit/internal/controls/image-view/image-view-impl.cpp
@@ -35,6 +35,7 @@ BaseHandle Create()
 DALI_TYPE_REGISTRATION_BEGIN( Toolkit::ImageView, Toolkit::Control, Create );
 DALI_PROPERTY_REGISTRATION( Toolkit, ImageView, "resourceUrl", STRING, RESOURCE_URL )
 DALI_PROPERTY_REGISTRATION( Toolkit, ImageView, "image", MAP, IMAGE )
+DALI_PROPERTY_REGISTRATION( Toolkit, ImageView, "preMultipliedAlpha", BOOLEAN, PRE_MULTIPLIED_ALPHA )
 
 DALI_ANIMATABLE_PROPERTY_REGISTRATION_WITH_DEFAULT( Toolkit, ImageView, "pixelArea", Vector4(0.f, 0.f, 1.f, 1.f), PIXEL_AREA )
 DALI_TYPE_REGISTRATION_END()
@@ -44,7 +45,8 @@ DALI_TYPE_REGISTRATION_END()
 using namespace Dali;
 
 ImageView::ImageView()
-: Control( ControlBehaviour( ACTOR_BEHAVIOUR_NONE ) )
+: Control( ControlBehaviour( ACTOR_BEHAVIOUR_NONE ) ),
+  mPremultipledAlphaEnabled( false )
 {
 }
 
@@ -145,6 +147,26 @@ void ImageView::SetImage( const std::string& url, ImageDimensions size )
   }
 }
 
+void ImageView::EnablePreMultipliedAlpha( bool preMultipled )
+{
+  mPremultipledAlphaEnabled = preMultipled;
+
+  if( mRenderer )
+  {
+    ControlRenderer& rendererImpl = GetImplementation( mRenderer );
+    if (&typeid( rendererImpl ) == &typeid(ImageRenderer) )
+    {
+      ImageRenderer* imageRenderer = static_cast<ImageRenderer*>( &rendererImpl );
+      imageRenderer->EnablePreMultipliedAlpha( preMultipled );
+    }
+  }
+}
+
+bool ImageView::IsPreMultipliedAlphaEnabled() const
+{
+  return mPremultipledAlphaEnabled;
+}
+
 void ImageView::SetDepthIndex( int depthIndex )
 {
   if( mRenderer )
@@ -266,6 +288,16 @@ void ImageView::SetProperty( BaseObject* object, Property::Index index, const Pr
 
         break;
       }
+
+      case Toolkit::ImageView::Property::PRE_MULTIPLIED_ALPHA:
+      {
+        bool IsPre;
+        if( value.Get( IsPre ) )
+        {
+          GetImpl(imageView).EnablePreMultipliedAlpha( IsPre );
+        }
+        break;
+      }
     }
   }
 }
@@ -308,6 +340,12 @@ Property::Value ImageView::GetProperty( BaseObject* object, Property::Index prop
         }
         break;
       }
+
+      case Toolkit::ImageView::Property::PRE_MULTIPLIED_ALPHA:
+      {
+        value = impl.IsPreMultipliedAlphaEnabled();
+        break;
+      }
     }
   }