Fills a path with a tiling pattern.
void FillPathWithTilingPattern(PathView path, FillRule rule, in DisplayTilingPattern pattern)
The path in user space under the current transform, exactly as for FillPath(PathView, FillRule, in DisplayColor).
The rule that decides the inside (§8.5.3.3.2, §8.5.3.3.3).
The pattern, its cell and its pattern space (Matrix).
ISO 32000-2 §8.7.3.1: inside the path (and the clip), the cell is painted as many times as needed, at multiples of XStep and YStep in pattern space, each copy clipped to the bounding box (the cell list does that itself). The tiles, painted onto a clear surface, are then composited over the backdrop as one object with the alpha and blend mode in force (§11.6.7).