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>

1 files changed, 1 insertions, 1 deletions

diff --git a/drmhwcomposer.h b/drmhwcomposer.h
index ff8c642..cd631b2 100644
--- a/drmhwcomposer.h
+++ b/drmhwcomposer.h
@@ -141,7 +141,7 @@ struct DrmHwcLayer {
   DrmHwcNativeHandle handle;
   uint32_t transform;
   DrmHwcBlending blending = DrmHwcBlending::kNone;
-  uint8_t alpha = 0xff;
+  uint16_t alpha = 0xffff;
   DrmHwcRect<float> source_crop;
   DrmHwcRect<int> display_frame;