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link_screen's sole purpose is to link a layer to multiple screens, if the layer should be shown in multiple screens. This can be only achieved, if surfaces of the layer have multiple weston_views dedicated to the different screens. Current implementation assumes in many places that a ivi_surface has only one weston_view. Therefore, a layer can be only shown on one screen. Although this (a layer on multiple screens) is a nice to have feature for ivi-shell, it is not very crucial. In any case, it is not an easy task to implement this feature, because it has lot of corner cases. I removed with this patch the link_screen data structure, because it does not have any purpose in current implementation. Signed-off-by: Emre Ucan <eucan@de.adit-jv.com> Tested-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp> Reviewed-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp> [Pekka: Line-wrapped commit message.]
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