get_resizable

Lets you query whether this has been marked as resizable via the set_resizable api.

By default, if possible, a this will be created by Cogl as non resizable, but it is not guaranteed that this is always possible for all window systems.

<note>If cogl_onscreen_set_resizable(this, true) has been previously called then this function will return true, but it's possible that the current windowing system being used does not support window resizing (consider fullscreen windows on a phone or a TV). This function is not aware of whether resizing is truly meaningful with your window system, only whether the this has been marked as resizable.</note>

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