`Painter::primitive` takes `impl PrimitiveLike`: a primitive, or something
that yields one and does whatever else drawing it needs. A `&TextureHandle`
yields a `TexturePrimitive` and retains its share on the way through, so
`texture`, `texture_within` and `texture_at` are gone and an image is drawn
like anything else.
I said last round that the blanket impl would collide with the one for
`&TextureHandle` under coherence. It does not: `Primitive` is ours, so no
crate can add the impl that would overlap, and rustc accepts both.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>