commit a68a06af2b7f5ac1ce12c8fc46bbff67cfdff64f
author Jonas Larsson <ljonas@google.com> Tue Mar 05 11:59:42 2019 -0800
committer Jonas Larsson <ljonas@google.com> Wed Mar 06 11:58:24 2019 -0800
tree 3e122093f125b31d9d95f90fa58f4c5dcb6135ab
parent cfc9f92fa8b959b2a1c598920840d9c5fe3e4845

Render full size overlays, draw with glvideomixer

With this approach there's no need for downscaling as video and
overlay rendering are decoupled in glvideomixer, so we can do
1080p@30 in real time. Video frames are displayed at their
normal rate and overlays are rendered at a potentially slower
rate if we can't keep up without the video stalling.

The main improvment here is a custom source element that enables
us to hit a fast GL texture upload path where we draw the overlay
with cairo/rsvg straight into a dma-buf (allocated by ion) and use
that as a texture in glvideomixer.

Change-Id: Icf69e29ab55a95122754a6e9f2c63ac7adc2d465