From fbce6ac4cb9aebd795603fc2e315f6934bdabda7 Mon Sep 17 00:00:00 2001
From: Ichitaro Kohara <ichitaro.kohara@sonyericsson.com>
Date: Thu, 17 Feb 2011 12:31:23 +0100
Subject: Fixed to call computeVisibleRegions() when transparent value changed

When some Surfaces are overlapping and one of them changed to
transparent or opaque, the back Surfaces should appear or
disappear. This patch calls SurfaceFlinger::computeVisibleRegions()
to re-calculate region of each Surface to implement the behavior.

Change-Id: Iffb1caf1b4ce28dff252e114fe5b9b07d9c84a6f
---
 services/surfaceflinger/LayerBuffer.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/services/surfaceflinger/LayerBuffer.cpp b/services/surfaceflinger/LayerBuffer.cpp
index 23506cf..55d859d 100644
--- a/services/surfaceflinger/LayerBuffer.cpp
+++ b/services/surfaceflinger/LayerBuffer.cpp
@@ -93,6 +93,9 @@ bool LayerBuffer::needsBlending() const {
 }
 
 void LayerBuffer::setNeedsBlending(bool blending) {
+    if (mNeedsBlending != blending) {
+        mFlinger->invalidateLayerVisibility(this);
+    }
     mNeedsBlending = blending;
 }
 
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