commit d8aefb635a854c36b0cf2eb36ecdf9070ddc7151
author Sean Paul <seanpaul@chromium.org> Thu Oct 15 15:17:31 2015 -0400
committer Sean Paul <seanpaul@chromium.org> Thu Oct 15 16:59:45 2015 -0400
tree 22c3618f95a672c6872d65a7013f0253c6f866f0
parent 738593c7c5e96b8a16fad8be661710374994e510

drm_hwcomposer: Use layer alpha to blend planes

Send the layer alpha to the drm plane's alpha property to
properly blend layers.

BUG=b/24821110
TEST=Tested on smaug with Downloads/About windows, blend properly

Change-Id: If96eb28d65d018863c39bc5a3554daef0264144b
Signed-off-by: Sean Paul <seanpaul@chromium.org>

drmplane.cpp

diff --git a/drmplane.cpp b/drmplane.cpp
index 3f17d7c..5785d5a 100644
--- a/drmplane.cpp
+++ b/drmplane.cpp
@@ -124,6 +124,10 @@
   if (ret)
     ALOGE("Could not get rotation property");
 
+  ret = drm_->GetPlaneProperty(*this, "alpha", &alpha_property_);
+  if (ret)
+    ALOGI("Could not get alpha property");
+
   return 0;
 }
 
@@ -182,4 +186,8 @@
 const DrmProperty &DrmPlane::rotation_property() const {
   return rotation_property_;
 }
+
+const DrmProperty &DrmPlane::alpha_property() const {
+  return alpha_property_;
+}
 }