commit 025d0a65c48f17ea3ffb80fbcfe31ae9e8056556
author Stefan Schake <stschake@gmail.com> Fri May 04 18:03:00 2018 +0200
committer Stefan Schake <stschake@gmail.com> Fri May 04 18:12:35 2018 +0200
tree ade4d05fc864b2ef9846fbd2e0c5da0897a41746
parent d2ad301ea1a0bd356865026b4f37f4c86b75616a

drm_hwcomposer: Use 16 bit value for plane alpha

The upstream version of the alpha property uses 16 bits to make it future
proof. Since HWC2 already passes in a float expand our internal
representation instead of just shifting for DRM.

Signed-off-by: Stefan Schake <stschake@gmail.com>

drmdisplaycompositor.cpp

diff --git a/drmdisplaycompositor.cpp b/drmdisplaycompositor.cpp
index 40af3be..0b4e2b2 100644
--- a/drmdisplaycompositor.cpp
+++ b/drmdisplaycompositor.cpp
@@ -551,7 +551,7 @@
     DrmHwcRect<int> display_frame;
     DrmHwcRect<float> source_crop;
     uint64_t rotation = 0;
-    uint64_t alpha = 0xFF;
+    uint64_t alpha = 0xFFFF;
 
     if (comp_plane.type() != DrmCompositionPlane::Type::kDisable) {
       if (source_layers.size() > 1) {