import sys from pathlib import Path from types import SimpleNamespace import bpy import numpy as np import pytest sys.path.insert(0, str(Path(__file__).parents[1] / "src")) from anyimage.common import material from tools.nodes.groups.image_layer import build_image_layer_group from tools.nodes.groups.image_depth_layer import build_image_depth_layer_group @pytest.fixture def image_layer(): bpy.ops.wm.read_factory_settings(use_empty=True) group = build_image_layer_group() yield group bpy.ops.wm.read_factory_settings(use_empty=True) def test_alpha_curve_preserves_endpoints_and_suppresses_soft_edges(image_layer): inputs = { item.name: item for item in image_layer.interface.items_tree if item.item_type == "SOCKET" and item.in_out == "INPUT" } assert list(inputs) == [ "Color", "Alpha", "Normal", "Bump Scale", "Alpha Fix", "Normal Scale", "Object Space", ] panels = [item for item in image_layer.interface.items_tree if item.item_type == "PANEL"] assert len(panels) == 1 assert panels[0].name == "Options" and panels[0].default_closed assert [item.name for item in panels[0].interface_items] == ["Alpha Fix", "Normal Scale", "Object Space"] strength = inputs["Alpha Fix"] assert (strength.default_value, strength.min_value, strength.max_value) == (0, 0, 1) assert strength.subtype == "FACTOR" output = next(node for node in image_layer.nodes if node.type == "GROUP_OUTPUT") curve = output.inputs["Alpha"].links[0].from_node assert curve.type == "CURVE_FLOAT" assert curve.inputs["Value"].links[0].from_socket.name == "Alpha" assert curve.inputs["Factor"].links[0].from_socket.name == "Alpha Fix" mapping = curve.mapping np.testing.assert_allclose( [point.location[:] for point in mapping.curves[0].points], [(0, 0), (0.8, 0), (0.925, 0.925), (1, 1)], atol=1e-6, ) samples = np.array([ mapping.evaluate(mapping.curves[0], float(alpha)) for alpha in np.linspace(0, 1, 1001) ]) np.testing.assert_allclose(samples[:801], 0, atol=3e-4) assert samples[-1] == pytest.approx(1) assert np.all(np.diff(samples) >= -1e-6) assert np.all((samples >= 0) & (samples <= 1)) assert mapping.evaluate(mapping.curves[0], 0.85) == pytest.approx(0.1593, abs=1e-3) assert mapping.evaluate(mapping.curves[0], 0.925) == pytest.approx(0.925, abs=5e-4) assert all(socket.is_linked or socket.hide for node in image_layer.nodes for socket in node.outputs) @pytest.mark.parametrize("enabled", [False, True]) @pytest.mark.parametrize("shadeless", [False, True]) @pytest.mark.parametrize("view", ["AgX", "Unknown"]) def test_material_alpha_strength_follows_preference(image_layer, monkeypatch, enabled, shadeless, view): monkeypatch.setattr(material, "material_node_group", lambda depth_plane=False: image_layer) monkeypatch.setattr(material, "configured_material_view_adaptation", lambda: enabled) color = bpy.data.images.new("Alpha edge", width=2, height=2, alpha=True) scene = SimpleNamespace(view_settings=SimpleNamespace(view_transform=view)) result = material.create_image_material(color, color, shadeless=shadeless, scene=scene) layer = next(node for node in result.node_tree.nodes if node.type == "GROUP" and node.node_tree == image_layer) assert layer.inputs["Alpha Fix"].default_value == float(enabled) alpha_link = layer.outputs["Alpha"].links[0] assert alpha_link.to_node.type == ("MIX_SHADER" if shadeless else "BSDF_PRINCIPLED") assert alpha_link.to_socket.name == ("Fac" if shadeless else "Alpha") layer.inputs["Alpha Fix"].default_value = 0.5 monkeypatch.setattr(material, "configured_material_view_adaptation", lambda: not enabled) second = material.create_image_material(color, color, shadeless=shadeless, scene=scene) second_layer = next(node for node in second.node_tree.nodes if node.type == "GROUP" and node.node_tree == image_layer) assert second_layer.inputs["Alpha Fix"].default_value == float(not enabled) assert layer.inputs["Alpha Fix"].default_value == 0.5 def test_depth_layer_keeps_foreground_alpha_threshold(image_layer): depth = build_image_depth_layer_group() assert "Alpha Fix" not in { item.name for item in depth.interface.items_tree if item.item_type == "SOCKET" } output = next(node for node in depth.nodes if node.type == "GROUP_OUTPUT") threshold = output.inputs["Alpha"].links[0].from_node assert threshold.operation == "GREATER_THAN" assert threshold.inputs[1].default_value == 0.5 assert threshold.inputs[0].links[0].from_socket.name == "Alpha" def test_alpha_adjustment_shader_blends_curve_strength(image_layer, tmp_path): scene = bpy.context.scene scene.render.engine = "CYCLES" scene.cycles.device = "CPU" scene.cycles.samples = 1 scene.cycles.use_denoising = False scene.render.resolution_x = 96 scene.render.resolution_y = 32 scene.render.resolution_percentage = 100 scene.render.image_settings.file_format = "OPEN_EXR" scene.render.image_settings.color_depth = "32" scene.render.filepath = str(tmp_path / "alpha-strength.exr") bpy.ops.object.camera_add(location=(0, 0, 5)) camera = bpy.context.object camera.data.type = "ORTHO" camera.data.ortho_scale = 3 scene.camera = camera for index, factor in enumerate((0, 0.5, 1)): bpy.ops.mesh.primitive_plane_add(size=1, location=(index - 1, 0, 0)) result = bpy.data.materials.new(f"Alpha {factor}") result.use_nodes = True nodes = result.node_tree.nodes nodes.clear() layer = nodes.new("ShaderNodeGroup") layer.node_tree = image_layer layer.inputs["Alpha"].default_value = 0.9 layer.inputs["Alpha Fix"].default_value = factor emission = nodes.new("ShaderNodeEmission") output = nodes.new("ShaderNodeOutputMaterial") result.node_tree.links.new(layer.outputs["Alpha"], emission.inputs["Color"]) result.node_tree.links.new(emission.outputs[0], output.inputs["Surface"]) bpy.context.object.data.materials.append(result) bpy.ops.render.render(write_still=True) rendered = bpy.data.images.load(scene.render.filepath, check_existing=False) try: pixels = np.array(rendered.pixels[:]).reshape(32, 96, 4) values = pixels[16, [16, 48, 80], 0] assert values[0] == pytest.approx(0.9, abs=1e-4) assert values[2] == pytest.approx(0.77396, abs=1e-3) assert values[1] == pytest.approx((values[0] + values[2]) / 2, abs=1e-4) finally: bpy.data.images.remove(rendered)