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Olivier Fourdan authored
The API `wl_buffer_add_listener` is misleading in the sense that there can be only one `wl_buffer` release callback, and trying to add a new listener when once is already in place will lead to a protocol error. The Xwayland EGL backends may need to set up their own `wl_buffer` release listener, meaning that there is no way to our own `wl_buffer` release callback. To avoid the problem, add our own callback API to be notified when the `wl_buffer` associated with an `xwl_pixmap` is released, triggered from the different `xwl_pixmap` implementations. Also update the Present code to use the new buffer release callback API. Signed-off-by: Olivier Fourdan <ofourdan@redhat.com> Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
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