xwayland: Try manual redirection for surface window in glamor_check_flip
If the surface window already uses automatic redirection, we can upgrade
to manual redirection and save some blits with common use cases.
This fixes a minor performance regression from a65bb8480a
('Revert
"xwayland/glamor: Avoid implicit redirection with depth 32 parent
windows"') with mutter >= 44.
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1570>
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@ -93,6 +93,8 @@ xwl_glamor_check_flip(WindowPtr present_window, PixmapPtr pixmap)
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{
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ScreenPtr screen = pixmap->drawable.pScreen;
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PixmapPtr backing_pixmap = screen->GetWindowPixmap(present_window);
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struct xwl_window *xwl_window = xwl_window_from_window(present_window);
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WindowPtr surface_window = xwl_window->surface_window;
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if (pixmap->drawable.depth != backing_pixmap->drawable.depth) {
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if (pixmap->drawable.depth == 32)
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@ -101,6 +103,10 @@ xwl_glamor_check_flip(WindowPtr present_window, PixmapPtr pixmap)
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return xwl_present_maybe_redirect_window(present_window);
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}
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if (surface_window->redirectDraw == RedirectDrawAutomatic &&
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surface_window->drawable.depth != 32)
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xwl_present_maybe_redirect_window(surface_window);
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return TRUE;
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}
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