commit e7f39727a484107b2d2a78eaaaacad3d7f44c24d
author neo.he <neo.he@mstarsemi.com> Tue Mar 21 11:48:36 2017 +0800
committer neo.he <neo.he@mstarsemi.com> Tue Mar 21 12:04:03 2017 +0800
tree 8d8e407fe5c860c891694344cad408a074846952
parent e6fd41d064711395c7d060abacd86d487495530d

Add alpha channel for  the EGLConfig

If the alpha channel is not assigned,the framebuffer will be Opaque.
And it will mask the underlying video and make the video invisible
when play video width mediaplayer

Issue: 258684
Test: media player
Change-Id: If756ad2aaa789f6ddb178333b3e8854f52c8eac3

services/surfaceflinger/RenderEngine/RenderEngine.cpp

diff --git a/services/surfaceflinger/RenderEngine/RenderEngine.cpp b/services/surfaceflinger/RenderEngine/RenderEngine.cpp
index 2aec9e9..3af8a34 100644
--- a/services/surfaceflinger/RenderEngine/RenderEngine.cpp
+++ b/services/surfaceflinger/RenderEngine/RenderEngine.cpp
@@ -380,6 +380,7 @@
         attribs[EGL_RED_SIZE]                   = 8;
         attribs[EGL_GREEN_SIZE]                 = 8;
         attribs[EGL_BLUE_SIZE]                  = 8;
+        attribs[EGL_ALPHA_SIZE]                 = 8;
         wantedAttribute                         = EGL_NONE;
         wantedAttributeValue                    = EGL_NONE;
     } else {