Advance M8-M11 parity workflows

tools/web/generate-m11-compositor-allowlist.py

@@ -0,0 +1,54 @@
+import pathlib
+import sys
+
+import bpy
+
+
+SCENES = (
+    ("M11 Constant", (0.125, 0.25, 0.5, 0.75), ()),
+    ("M11 Exposure", (0.125, 0.25, 0.5, 0.75), (("EXPOSURE", 1.0),)),
+    ("M11 Invert", (0.125, 0.25, 0.5, 0.75), (("INVERT", None),)),
+    ("M11 Chain", (0.125, 0.25, 0.5, 0.75), (("EXPOSURE", 1.0), ("INVERT", None))),
+)
+
+
+def add_graph(scene, color_value, operations):
+    tree = bpy.data.node_groups.new(f"{scene.name} Tree", "CompositorNodeTree")
+    scene.compositing_node_group = tree
+    tree.interface.new_socket(name="Image", in_out="OUTPUT", socket_type="NodeSocketColor")
+    color = tree.nodes.new("CompositorNodeRGB")
+    color.name = f"{scene.name} Constant"
+    color.outputs["Color"].default_value = color_value
+    previous = color.outputs["Color"]
+    for index, (operation, parameter) in enumerate(operations):
+        if operation == "EXPOSURE":
+            node = tree.nodes.new("CompositorNodeExposure")
+            node.inputs["Exposure"].default_value = parameter
+        else:
+            node = tree.nodes.new("CompositorNodeInvert")
+        node.name = f"{scene.name} {operation.title()} {index}"
+        tree.links.new(previous, node.inputs["Image" if operation == "EXPOSURE" else "Color"])
+        previous = node.outputs["Image" if operation == "EXPOSURE" else "Color"]
+    output = tree.nodes.new("NodeGroupOutput")
+    output.name = f"{scene.name} Composite"
+    tree.links.new(previous, output.inputs["Image"])
+
+
+def main(output_path):
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    first = bpy.context.scene
+    for index, (name, color, operations) in enumerate(SCENES):
+        scene = first if index == 0 else bpy.data.scenes.new(name)
+        scene.name = name
+        add_graph(scene, color, operations)
+    output = pathlib.Path(output_path).resolve()
+    output.parent.mkdir(parents=True, exist_ok=True)
+    bpy.ops.wm.save_as_mainfile(filepath=str(output), compress=True)
+    print(f"m11-compositor-allowlist fixture={output} scenes={len(SCENES)}")
+
+
+if __name__ == "__main__":
+    arguments = sys.argv[sys.argv.index("--") + 1:]
+    if len(arguments) != 1:
+        raise SystemExit("usage: blender -b --python generate-m11-compositor-allowlist.py -- OUTPUT")
+    main(arguments[0])