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backend/wayland: use wlr_swapchain #2498
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- The DRM backend initially doesn't have a frame scheduled initially. However the compositor is expected to set a mode to start the rendering loop (frame_pending is set to true in drm_crtc_pageflip). - The headless and X11 backends have a timer to schedule frames, so they ignore this hint completely. - The Wayland backend renders a fake frame to start the rendering loop. It's the only case where a frame is pending on init, move the assumption there.
Instead of rendering a black frame, schedule a frame event to ask the compositor to render a proper frame.
The cursor surface still uses a wl_egl_window. References: swaywm#1352
Now that the Wayland backend has moved to wlr_swapchain, only client examples use the dependency. Stop linking against wayland-egl in the wlroots library.
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Depends on #2496TODO:
wlr_swapchainfor main surfacewlr_swapchainfor cursor surfaceFuture work:
wl_bufferon each commit -- cache them (backend/wayland: re-use wl_buffers #2538)References: #1352