begin-mode-2d and end-mode-2d have been bound since Camera2D went in and called by nothing, which is the same as not having bound them. The grid now draws through a camera the arrow keys pan and comma and period zoom, and paint has to undo that transform with get-screen-to-world-2d — so a camera plumbed in wrongly is visible at once as grains landing somewhere other than the cursor, rather than as nothing at all. The shapes, the text and the timing come with it, and none of them can be asserted: every one needs a GL context, and measure-text needs init-window too — the default font is loaded there and nowhere else, so headless it answers 0 for every string. Measured against libraylib.so.550, not assumed, which is why it is absent from the acceptance table despite looking exactly like a call that belongs in it. So the HUD is built to be looked at instead: each shape binding appears once and each is asymmetric enough that crossed arguments show. The ellipse is wider than it is tall, the ring's sweep comes from get-time, the triangle has its counter-clockwise winding with an outline over it as a control, and the panel is sized by measure-text rather than by a guess. draw-rectangle-rounded-lines takes no thickness in raylib 5.5 — it moved to the -ex form, and both are here. The 5.1 header on this machine still shows the five-argument version; nm -D on the library is what settled it. Font loading stays unbound and says so: a Font carries a Texture2D, a Rectangle* and a GlyphInfo*, and a GlyphInfo carries an Image.
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