When to enable WSEGL_ENABLE_AGGRESSIVE_SYNC?

[sdikshit786]

wayland-wsegl/src/waylandws_client.c

Line 621 in e3d3f5e

if (display->aggressive_sync)

Please guide on the use case when we should enable WSEGL_ENABLE_AGGRESSIVE_SYNC and why we need this?

[NguyenBNguyen]

Hello sdikshit786,
Due to the specification of Weston, the surface may not be updated for event waiting status under certain conditions in the double buffer constitution(#export WSEGL_NUM_BUFFERS=2). As the action in this software, by specifying to 1 in the environment variable (#export WSEGL_ENABLE_AGGRESSIVE_SYNC=1), the process of synchronization is requested, and then the event is came out
For example, when using 'weston-simple-egl -f' with double buffers and gl-renderer in Weston, we can send wl_display_sync() aggressively in wayland_wait_for_buffer_release().

Br
Nguyen BNguyen