Re: [PATCH v3 0/8] MR5665: For a CS_PARENTDC child use parent for visible region calculations.

[Jinoh Kang (＠iamahuman)]

Jinoh Kang (@iamahuman) commented about server/window.c:
> struct region *tmp;
>
> if (!get_window_visible_rect( win, &rect, frame )) return NULL;
> +
> +    if (win->parent && is_window_using_parent_dc( win ))
> +    {
> +        int offset_x, offset_y;
> +
> +        if (!get_window_visible_rect( win->parent, &rect, 0 )) return NULL;

What if the parent window is using parent DC too? Shall we ascend the ancestor chain until we meet a non-`CS_PARENTDC` window?

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https://gitlab.winehq.org/wine/wine/-/merge_requests/5665#note_72955