AnyImage/tests/anyimage/operators/test_panorama_conversion.py

"""Verify the public panorama entry and transactional Blender result handling."""

import json
from types import SimpleNamespace
from unittest.mock import Mock, patch

import bpy
import numpy as np
import pytest
from PIL import Image
from mathutils import Matrix

from anyimage.operators.convert_to_panorama import operators, object as conversion
from server.geometry.depth_texture import write_float_exr
from anyimage.common.color_image import prepare_material_color_input, cleanup_material_color_input


@pytest.fixture
def source():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Current panorama", width=32, height=16, alpha=True)
    rgba = np.ones((16, 32, 4), np.float32)
    rgba[:8, :, 3] = 0
    rgba[8:12, :, 3] = 0.5
    image.pixels.foreach_set(rgba.ravel())
    obj = bpy.data.objects.new("Panorama Empty", None)
    obj.empty_display_type = "IMAGE"
    obj.data = image
    bpy.context.collection.objects.link(obj)
    obj.select_set(True)
    bpy.context.view_layer.objects.active = obj
    return obj


def test_entry_submits_current_alpha_preferences_and_cleans_cancelled_input(source, monkeypatch):
    submitted = {}
    def submit(**parameters):
        submitted.update(parameters)
        with Image.open(parameters["input_path"]) as image:
            alpha = np.asarray(image)[..., 3]
            assert not alpha[8:].any()
            assert np.all(abs(alpha[4:8].astype(float) - 128) <= 1)
        return {"CANCELLED"}
    monkeypatch.setattr(operators, "invoke_ai_setup_if_needed", lambda _operator: None)
    monkeypatch.setattr(operators, "addon_preferences", lambda _: SimpleNamespace(geometry_model="MOGE2_VITB", geometry_resolution_level=2))
    monkeypatch.setattr(operators, "configured_geometry_model", lambda _: "MOGE2_VITB_NORMAL")
    monkeypatch.setattr(operators, "configured_max_ai_input_size", lambda _: 1024)
    monkeypatch.setattr(operators, "bpy", SimpleNamespace(ops=SimpleNamespace(anyimage=SimpleNamespace(generate_panorama=submit))))
    operator = SimpleNamespace(mesh_detail=4, report=Mock())
    assert operators.ConvertToPanorama.execute(operator, bpy.context) == {"CANCELLED"}
    assert submitted["model"] == "MOGE2_VITB_NORMAL" and submitted["resolution_level"] == 2
    assert submitted["max_input_size"] == 1024 and submitted["mesh_detail"] == 4
    assert submitted["color_path"] == submitted["input_path"]
    from pathlib import Path
    assert not Path(submitted["input_path"]).exists()
    assert bpy.data.objects.get(source.name) == source


@pytest.mark.parametrize("image_source,size", [("MOVIE", (32, 16)), ("SEQUENCE", (32, 16)), ("FILE", (32, 32))])
def test_invalid_input_is_rejected_before_setup(image_source, size, monkeypatch):
    setup = Mock()
    monkeypatch.setattr(operators, "invoke_ai_setup_if_needed", setup)
    obj = SimpleNamespace(data=SimpleNamespace(source=image_source, size=size))
    assert operators.ConvertToPanorama.execute(SimpleNamespace(report=Mock()), SimpleNamespace(object=obj)) == {"CANCELLED"}
    setup.assert_not_called()


@pytest.fixture
def artifacts(tmp_path, source):
    rgba = np.ones((16, 32, 4), np.float32)
    rgba[..., :3] = 3
    write_float_exr(rgba, tmp_path / "depth.exr")
    (tmp_path / "depth.json").write_text(json.dumps({"projection": "equirectangular", "image_size": [32, 16], "reference_distance": 3}))
    result = SimpleNamespace(directory=tmp_path, file=lambda key: tmp_path / {"depth": "depth.exr", "depth_metadata": "depth.json"}[key])
    operator = SimpleNamespace(source_object_name=source.name, source_identity=str(source.as_pointer()),
                               image_identity=str(source.data.as_pointer()), mesh_detail=2,
                               color_path=str(prepare_material_color_input(source.data)))
    yield result, operator
    cleanup_material_color_input(operator.color_path)


def test_result_replaces_source_with_zero_rotation_and_shadeless_material(source, artifacts, monkeypatch):
    result, operator = artifacts
    matrix = Matrix.Translation((2, -3, 4)) @ Matrix.Rotation(0.6, 4, "Y") @ Matrix.Diagonal((2, 3, 4, 1))
    source.matrix_world = matrix
    source.empty_image_offset = (0.3, -0.8)
    undo = Mock(return_value={"FINISHED"})
    monkeypatch.setattr(conversion, "bpy", SimpleNamespace(data=bpy.data, ops=SimpleNamespace(ed=SimpleNamespace(undo_push=undo))))
    obj = conversion.create_panorama_from_result(bpy.context, result, operator)
    assert obj.name == operator.source_object_name and obj.type == "MESH"
    np.testing.assert_allclose(obj.location, matrix.translation, atol=1e-6)
    np.testing.assert_allclose(obj.scale, matrix.to_scale(), atol=1e-6)
    np.testing.assert_array_equal(obj.rotation_euler, (0, 0, 0))
    material = obj.data.materials[0]
    assert any(n.type == "GROUP" and n.node_tree.name == "O Shadeless" for n in material.node_tree.nodes)
    assert [n.node_tree.name for n in material.node_tree.nodes if n.type == "GROUP"] == ["O Shadeless"]
    texture = next(n for n in material.node_tree.nodes if n.type == "TEX_IMAGE")
    assert texture.extension == "REPEAT"
    assert bpy.context.view_layer.objects.active == obj
    assert all(image.packed_file for image in bpy.data.images if image.name.endswith(("_color.png", "_depth.exr")))
    graph = bpy.context.evaluated_depsgraph_get()
    mesh = obj.evaluated_get(graph).to_mesh()
    try:
        assert len(mesh.polygons) == 96 and mesh.uv_layers.active
        assert mesh.materials[0].original == material
        assert all(face.material_index == 0 and face.use_smooth for face in mesh.polygons)
    finally:
        obj.evaluated_get(graph).to_mesh_clear()
    undo.assert_called_once_with(message="Convert to Panorama")


@pytest.mark.parametrize("shared", [False, True])
def test_panorama_preserves_hdr_pixels_color_space_and_alpha(source, artifacts, monkeypatch, shared):
    result, operator = artifacts
    hdr = bpy.data.images.new("Original HDR", width=32, height=16, alpha=True, float_buffer=True)
    hdr.alpha_mode = "PREMUL"
    rgba = np.ones((16, 32, 4), np.float32)
    rgba[..., :3] = (4.0, 2.0, 0.5)
    rgba[..., 3] = 0.5
    hdr.pixels.foreach_set(rgba.ravel())
    source.data = hdr
    operator.image_identity = str(hdr.as_pointer())
    cleanup_material_color_input(operator.color_path)
    operator.color_path = str(prepare_material_color_input(hdr))
    if shared:
        other = source.copy()
        bpy.context.collection.objects.link(other)
    original_space, original_alpha = hdr.colorspace_settings.name, hdr.alpha_mode
    monkeypatch.setattr(conversion, "bpy", SimpleNamespace(data=bpy.data, ops=SimpleNamespace(ed=SimpleNamespace(undo_push=lambda **kw: {"FINISHED"})) ))
    obj = conversion.create_panorama_from_result(bpy.context, result, operator)
    color = next(n.image for n in obj.data.materials[0].node_tree.nodes if n.type == "TEX_IMAGE")
    assert color != hdr
    assert color.is_float and color.packed_file
    assert (color.colorspace_settings.name, color.alpha_mode) == (original_space, original_alpha)
    np.testing.assert_allclose(color.pixels[:], rgba.ravel(), atol=1e-6)
    assert (hdr.colorspace_settings.name, hdr.alpha_mode) == (original_space, original_alpha)
    library = result.directory / "hdr-copy.blend"
    bpy.data.libraries.write(str(library), {color})
    with bpy.data.libraries.load(str(library)) as (saved, loaded):
        loaded.images = saved.images
    restored = loaded.images[0]
    assert restored.is_float
    assert (restored.colorspace_settings.name, restored.alpha_mode) == (original_space, original_alpha)
    np.testing.assert_allclose(restored.pixels[:], rgba.ravel(), atol=1e-6)


@pytest.mark.parametrize("failure", ["modifier", "depth_size", "stale", "replaced_image", "finalize"])
def test_failed_response_keeps_source_and_cleans_owned_data(source, artifacts, monkeypatch, failure):
    result, operator = artifacts
    before = {name: set(getattr(bpy.data, name)) for name in ("images", "objects", "meshes", "materials")}
    if failure == "modifier":
        monkeypatch.setattr(conversion, "set_modifier_input", Mock(side_effect=RuntimeError("Failed modifier")))
    elif failure == "finalize":
        monkeypatch.setattr(conversion, "finalize_object_result", Mock(side_effect=RuntimeError("Failed finalize")))
    elif failure == "stale":
        operator.source_identity = "replaced"
    elif failure == "replaced_image":
        operator.image_identity = "replaced"
    else:
        (result.directory / "depth.json").write_text(json.dumps({"projection": "equirectangular", "image_size": [16, 8], "reference_distance": 3}))
    with pytest.raises((RuntimeError, ValueError)):
        conversion.create_panorama_from_result(bpy.context, result, operator)
    for name, values in before.items():
        assert set(getattr(bpy.data, name)) == values


def test_panorama_conversion_undo_restores_empty(source, artifacts):
    result, operator = artifacts
    name = source.name
    image_name = source.data.name
    original_space, original_alpha = source.data.colorspace_settings.name, source.data.alpha_mode
    bpy.context.preferences.edit.use_global_undo = True
    def execute(self, context):
        conversion.create_panorama_from_result(context, result, operator)
        return {"FINISHED"}
    with patch.object(operators.GeneratePanorama, "execute", execute):
        bpy.utils.register_class(operators.GeneratePanorama)
        try:
            bpy.ops.ed.undo_push(message="Before Panorama")
            assert bpy.ops.anyimage.generate_panorama("EXEC_DEFAULT") == {"FINISHED"}
            assert bpy.data.objects[name].type == "MESH"
            assert bpy.ops.ed.undo() == {"FINISHED"}
            assert bpy.data.objects[name].type == "EMPTY"
            assert (bpy.data.images[image_name].colorspace_settings.name,
                    bpy.data.images[image_name].alpha_mode) == (original_space, original_alpha)
            assert bpy.ops.ed.redo() == {"FINISHED"}
            assert bpy.data.objects[name].type == "MESH"
        finally:
            bpy.utils.unregister_class(operators.GeneratePanorama)