bed82427c6
Since a buffer can be used by multiple surfaces at once, we need to release the buffer only after all surfaces are finished with it. Currently we track whether or not to release the buffer based on the accessible boolean. This commit changes it to a counter to accomodate multiple users. Also, each surface needs to know whether not it is done with the buffer, so this commit adds a buffer_used boolean to the surface state. https://bugzilla.gnome.org/show_bug.cgi?id=761613