Render a single tile to an offscreen canvas and register it as a GL
texture, returning a TextureHandle you can wrap in a FillStyle of
{ fill: 'pattern', pattern }. Returns null only when an
OffscreenCanvas/2D context can't be acquired (very rare; same fallback
semantics as the prior CanvasPattern-based implementation).
Render a single tile to an offscreen canvas and register it as a GL texture, returning a
TextureHandleyou can wrap in aFillStyleof{ fill: 'pattern', pattern }. Returnsnullonly when anOffscreenCanvas/2D context can't be acquired (very rare; same fallback semantics as the priorCanvasPattern-based implementation).