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⚡ Optimize redundant type casting in rasterizer loop #48

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⚡ Optimize redundant type casting in rasterizer loop #48

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8 changes: 4 additions & 4 deletions src/mapcv/rasterizer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -47,13 +47,13 @@ def rasterize(
Background pixels are 0; polygons in later list positions overwrite
earlier ones. Non-polygon geometries are silently skipped.
"""
if any(int(cid) <= 0 or int(cid) > 255 for _, cid in geometries):
raise ValueError("class_id must be in 1..=255 (0 is reserved for background)")

height, width = out_shape
polygons: List[Tuple[RingSet, int]] = []
for geom, cid in geometries:
polygons.extend(_flatten(geom, int(cid)))
cid_int = int(cid)
if cid_int <= 0 or cid_int > 255:
raise ValueError("class_id must be in 1..=255 (0 is reserved for background)")
polygons.extend(_flatten(geom, cid_int))

return cast(
npt.NDArray[np.uint8],
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