Advance Blender WebEngine N-015 through N-022 parity

tools/web/generate-mask-fixture.py

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+import pathlib
+import sys
+
+import bpy
+
+
+def main(output_path):
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    mask = bpy.data.masks.new("WebMask")
+    layer = mask.layers.new(name="WebMaskLayer")
+    layer.alpha = 0.625
+    layer.hide_select = True
+    spline = layer.splines.new()
+    spline.use_cyclic = True
+    spline.use_fill = False
+    spline.points.add(2)
+
+    values = [
+        ((0.1, 0.2), (0.0, 0.2), (0.2, 0.2), "ALIGNED", 0.25, True),
+        ((0.5, 0.7), (0.4, 0.7), (0.6, 0.7), "VECTOR", 0.5, False),
+        ((0.8, 0.3), (0.7, 0.3), (0.9, 0.3), "FREE", 0.75, True),
+    ]
+    for point, value in zip(spline.points, values):
+        co, left, right, handle_type, weight, selected = value
+        point.co = co
+        point.handle_left = left
+        point.handle_right = right
+        point.handle_type = handle_type
+        point.weight = weight
+        point.select = selected
+
+    path = pathlib.Path(output_path).resolve()
+    path.parent.mkdir(parents=True, exist_ok=True)
+    bpy.ops.wm.save_as_mainfile(filepath=str(path), compress=False)
+    print(f"mask-fixture-generated path={path} points={len(spline.points)}")
+
+
+if __name__ == "__main__":
+    arguments = sys.argv[sys.argv.index("--") + 1:]
+    if len(arguments) != 1:
+        raise SystemExit("usage: blender -b --python generate-mask-fixture.py -- output.blend")
+    main(arguments[0])