gloverlaycompositor: Add GL sync point when uploading overlays (!5610) · Merge requests · GStreamer / gstreamer · GitLab

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Piotr Brzeziński requested to merge thewildtree/gstreamer:macos-gl-context-sync into main Nov 06, 2023

Fixes #1548 (closed)

In rare cases - notably on macOS, because of multiple GL contexts - the lack of a sync point was causing overlays to disappear
for a frame after being redrawn, or sometimes not appear at all. This change makes sure that the display in one GL context will
be correctly synchronised with the other GL context where the overlay texture was uploaded.