Properly convert the rendered layout images if alpha is needed.

The layoutlib can specify if the image is rendered as a floating
window, and needs alpha.
If it doesn't needed it we do a faster convert discarding the
alpha which will be better when playing animations in the normal
case.

Change-Id: I2dbd2d1ae9190207b51978e4a8d77cdff25f3e45

1 files changed, 10 insertions, 0 deletions

diff --git a/layoutlib_api/src/com/android/ide/common/rendering/api/RenderSession.java b/layoutlib_api/src/com/android/ide/common/rendering/api/RenderSession.java
index 0adf6f5..5a00ebc 100644
--- a/layoutlib_api/src/com/android/ide/common/rendering/api/RenderSession.java
+++ b/layoutlib_api/src/com/android/ide/common/rendering/api/RenderSession.java
@@ -73,6 +73,16 @@ public class RenderSession {
         return null;
     }
 
+    /**
+     * Returns true if the current session is rendered as a floating window.
+     * <p/>
+     * If true this means the alpha channel of {@link #getImage()} should be respected. If false,
+     * if can be dropped if it's more convenient/faster.
+     * @return whether the current session is rendered as a floating window.
+     */
+    public boolean isFloatingWindow() {
+        return true;
+    }
 
     /**
      * Returns a map of (XML attribute name, attribute value) containing only default attribute