Refactor image processing and cutout functionalities

- Updated the naming convention for upscaled images to include underscores and file extensions.
- Renamed properties related to cutout pixel size to point spacing for clarity.
- Adjusted alpha region calculations to use a half-alpha threshold for better accuracy.
- Enhanced the handling of foreground mesh masks to consider half-alpha values.
- Introduced new functions for unbounded selections and cutout images, ensuring proper handling of source and selection images.
- Improved test coverage for cutout functionalities, including bounds mapping and alpha preservation.
- Updated tests to reflect changes in naming conventions and functionality adjustments.

src/anyimage/operators/cutout.py

@@ -26,9 +26,9 @@ CUTOUT_DETAIL_MIN = 4
 CUTOUT_DETAIL_MAX = 1024
 
 
-def cutout_mesh_detail(image_size, pixel_size):
+def cutout_mesh_detail(image_size, point_spacing):
     longest_edge = max(int(value) for value in image_size)
-    detail = round(longest_edge / max(int(pixel_size), 1))
+    detail = round(longest_edge / max(int(point_spacing), 1))
     return max(CUTOUT_DETAIL_MIN, min(CUTOUT_DETAIL_MAX, detail))
 
 
@@ -69,9 +69,9 @@ def _open_shape_pie(
     source_name = source_object.name
     selection_data = json.dumps(polygon, separators=(",", ":"))
     settings = context.scene.anyimage_settings
-    pixel_size = settings.cutout_pixel_size
+    point_spacing = settings.cutout_point_spacing
     normal_analysis = bool(getattr(settings, "cutout_normal_analysis", False))
-    mesh_detail = cutout_mesh_detail(source_object.data.size, pixel_size)
+    mesh_detail = cutout_mesh_detail(source_object.data.size, point_spacing)
 
     def draw(menu, _context):
         pie = menu.layout.menu_pie()
@@ -147,6 +147,7 @@ class SelectCutoutRegion(ImageMaskGesture, bpy.types.Operator):
     gesture: gesture_property()
     full_image: bpy.props.BoolProperty(default=False, options={"HIDDEN", "SKIP_SAVE"})
 
+    preview_fill_rule = 'NONZERO'
     _pie_event = None
 
     def _set_status(self, context):
@@ -250,6 +251,6 @@ class CutoutTool(bpy.types.WorkSpaceTool):
 
     def draw_settings(context, layout, _tool):
         settings = context.scene.anyimage_settings
-        layout.prop(settings, "cutout_pixel_size")
+        layout.prop(settings, "cutout_point_spacing")
         layout.prop(settings, "cutout_normal_analysis")
         draw_image_mask_settings(context, layout)