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Michel Dänzer authored
It flushes any pending drawing to the kernel, to make sure it'll be visible to the Wayland server. Without this, it was possible for the Wayland server to process surface commits before Xwayland got around to flushing the corresponding drawing, which could result in stale or even completely random window contents being visible. v2: * Make EGL backend post_damage hook mandatory, don't check for NULL in xwl_glamor_post_damage. (Olivier Fourdan) Closes: #951 Reviewed-by: Olivier Fourdan <ofourdan@redhat.com>
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