Add comprehensive tests for image processing and mask functionalities

- Introduced tests for color image handling, ensuring source preservation and premultiplied alpha usage.
- Implemented tests for brush stroke operations, validating segment boundaries and brush anti-aliasing.
- Added tests for frame anti-aliasing, confirming correct rendering behavior with various alpha values and depth settings.
- Created tests for frame projection, ensuring accurate overlap calculations and half-plane clipping.
- Developed tests for image premultiplied retention, verifying behavior during loading and packing processes.
- Added undo functionality tests for mask operations, ensuring single transaction behavior during edits.

tests/test_cutout_interaction.py

@@ -8,7 +8,7 @@ sys.path.insert(0, str(SOURCE_ROOT))
 
 from anyimage.common.selection import SelectionPath
 from anyimage.common import viewport
-from anyimage.common.viewport import CropSelectionGesture
+from anyimage.common.viewport import ImageGesture
 from anyimage.operators.cutout_tool import interaction
 from anyimage.operators.cutout_tool import main as cutout_main
 
@@ -64,7 +64,6 @@ def test_cutout_pie_uses_two_local_shapes_without_ai(monkeypatch):
         object(),
         source,
         SelectionPath(points=((0, 0), (10, 0), (0, 10))),
-        refine_selection=True,
     )
 
     assert [call[2].shape for call in window_manager.pie.calls] == [
@@ -79,7 +78,6 @@ def test_cutout_pie_uses_two_local_shapes_without_ai(monkeypatch):
         call[0] == "anyimage.cutout_selection_to_shape"
         for call in window_manager.pie.calls
     )
-    assert not any(call[2].refine_selection for call in window_manager.pie.calls)
     assert not any(call[2].generate_normal for call in window_manager.pie.calls)
     assert all(call[2].point_spacing == 32 for call in window_manager.pie.calls)
     assert all(call[2].inward_axis == "NEGATIVE_Z" for call in window_manager.pie.calls)
@@ -111,9 +109,7 @@ def test_cutout_pie_passes_image_lasso_options_to_all_ai_shapes(monkeypatch):
         source,
         SelectionPath(
             points=((0, 0), (10, 0), (0, 10)),
-            invert=True,
         ),
-        refine_selection=True,
     )
 
     assert [call[2].shape for call in window_manager.pie.calls] == [
@@ -122,16 +118,16 @@ def test_cutout_pie_passes_image_lasso_options_to_all_ai_shapes(monkeypatch):
         "DEPTH_BALLOON",
         "DEPTH_SURFACE",
     ]
-    assert all(call[2].refine_selection for call in window_manager.pie.calls)
     assert all(call[2].generate_normal for call in window_manager.pie.calls)
     assert len(serialized) == 1
-    assert set(json.loads(serialized[0])) == {"points", "invert"}
+    assert set(json.loads(serialized[0])) == {"points"}
     assert all(
         call[2].selection_path_json == serialized[0]
         for call in window_manager.pie.calls
     )
     assert all(
-        SelectionPath.from_json(call[2].selection_path_json).invert
+        SelectionPath.from_json(call[2].selection_path_json).points
+        == ((0.0, 0.0), (10.0, 0.0), (0.0, 10.0))
         for call in window_manager.pie.calls
     )
     assert all(call[2].point_spacing == 16 for call in window_manager.pie.calls)
@@ -163,7 +159,6 @@ def test_cutout_reuses_image_lasso_gesture_and_double_click_selects_all(monkeypa
     )
     monkeypatch.setattr(cutout_main, "video_total_frames", lambda _image: 1)
     monkeypatch.setattr(cutout_main, "require_image_empty", lambda _name: source)
-    monkeypatch.setattr(cutout_main, "apply_crop_settings", lambda *_args: None)
     monkeypatch.setattr(cutout_main, "serialize_matrix", lambda _matrix: "matrix")
     monkeypatch.setattr(
         cutout_main,
@@ -180,7 +175,6 @@ def test_cutout_reuses_image_lasso_gesture_and_double_click_selects_all(monkeypa
 
     operator = SimpleNamespace(
         full_image=True,
-        refine_selection=False,
         report=lambda *_args: None,
     )
     source.matrix_world = object()
@@ -192,7 +186,7 @@ def test_cutout_reuses_image_lasso_gesture_and_double_click_selects_all(monkeypa
         operator, context, SimpleNamespace(value="DOUBLE_CLICK")
     )
 
-    assert issubclass(cutout_main.SelectCutoutSelection, CropSelectionGesture)
+    assert issubclass(cutout_main.SelectCutoutSelection, ImageGesture)
     assert result == {"FINISHED"}
     selection_path = SelectionPath.from_json(window_manager.pie.calls[0][2].selection_path_json)
     assert selection_path.points == (
@@ -205,16 +199,25 @@ def test_cutout_reuses_image_lasso_gesture_and_double_click_selects_all(monkeypa
     assert not hasattr(cutout_main, "pending_selection")
 
 
-def test_cutout_tool_prioritizes_double_click_before_lasso_press():
+def test_cutout_tool_prioritizes_double_click_before_lasso_drag():
     assert cutout_main.CutoutTool.bl_keymap[0][1]["value"] == "DOUBLE_CLICK"
-    assert cutout_main.CutoutTool.bl_keymap[1][1]["value"] == "PRESS"
+    assert cutout_main.CutoutTool.bl_keymap[1][1]["value"] == "CLICK_DRAG"
+    assert [entry[0] for entry in cutout_main.CutoutTool.bl_keymap[2:]] == [
+        "view3d.select",
+        "view3d.select",
+    ]
+    assert cutout_main.CutoutTool.bl_keymap[2][2] == {
+        "properties": [("deselect_all", False)]
+    }
+    assert cutout_main.CutoutTool.bl_keymap[3][2] == {
+        "properties": [("toggle", True)]
+    }
 
 
-def test_cutout_f_does_not_toggle_invert(monkeypatch):
+def test_cutout_f_has_no_option_shortcut(monkeypatch):
     operator = SimpleNamespace(
         gesture="LASSO",
         active_tool_id="anyimage.cutout_lasso",
-        invert=False,
     )
     monkeypatch.setattr(viewport, "active_view3d_tool_id", lambda _context: None)
 
@@ -225,7 +228,6 @@ def test_cutout_f_does_not_toggle_invert(monkeypatch):
     )
 
     assert result == {"PASS_THROUGH"}
-    assert operator.invert is False
 
 
 def test_cutout_status_has_no_letter_shortcut():