When the guest driver is Virgl while Xwayland is on Zink, Virgl can request virtgpu classic 3d resource allocations for swapchain images. Zink will import when the image is shared with xserver and will export for fd info of all 2d images later to be forwarded. Cc: mesa-stable Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25579>