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# SPDX-FileCopyrightText: 2020-2023 Blender Authors
#
# SPDX-License-Identifier: Apache-2.0
# ./blender.bin --background --python tests/python/bl_blendfile_io.py
import bpy
import os
import sys
sys.path.append(os.path.dirname(os.path.realpath(__file__)))
from bl_blendfile_utils import TestHelper
class TestBlendFileSaveLoadBasic(TestHelper):
def __init__(self, args):
self.args = args
def test_save_load(self):
bpy.ops.wm.read_homefile(use_empty=True, use_factory_startup=True)
bpy.data.meshes.new("OrphanedMesh")
output_dir = self.args.output_dir
self.ensure_path(output_dir)
# Take care to keep the name unique so multiple test jobs can run at once.
output_path = os.path.join(output_dir, "blendfile_io.blend")
orig_data = self.blender_data_to_tuple(bpy.data, "orig_data 1")
bpy.ops.wm.save_as_mainfile(filepath=output_path, check_existing=False, compress=False)
bpy.ops.wm.open_mainfile(filepath=output_path, load_ui=False)
read_data = self.blender_data_to_tuple(bpy.data, "read_data 1")
# We have orphaned data, which should be removed by file reading, so there should not be equality here.
assert orig_data != read_data
bpy.data.orphans_purge()
orig_data = self.blender_data_to_tuple(bpy.data, "orig_data 2")
bpy.ops.wm.save_as_mainfile(filepath=output_path, check_existing=False, compress=False)
bpy.ops.wm.open_mainfile(filepath=output_path, load_ui=False)
read_data = self.blender_data_to_tuple(bpy.data, "read_data 2")
assert orig_data == read_data
class TestBlendFileSavePartial(TestHelper):
OBJECT_MESH_NAME = "ObjectMesh"
OBJECT_MATERIAL_NAME = "ObjectMaterial"
OBJECT_NAME = "Object"
UNUSED_MESH_NAME = "UnusedMesh"
def __init__(self, args):
self.args = args
def test_save_load(self):
bpy.ops.wm.read_homefile(use_empty=True, use_factory_startup=True)
ob_mesh = bpy.data.meshes.new(self.OBJECT_MESH_NAME)
ob_material = bpy.data.materials.new(self.OBJECT_MATERIAL_NAME)
ob_mesh.materials.append(ob_material)
ob = bpy.data.objects.new(self.OBJECT_NAME, object_data=ob_mesh)
bpy.context.collection.objects.link(ob)
unused_mesh = bpy.data.meshes.new(self.UNUSED_MESH_NAME)
unused_mesh.materials.append(ob_material)
assert ob_mesh.users == 1
assert ob_material.users == 2
assert ob.users == 1
assert unused_mesh.users == 0
output_dir = self.args.output_dir
self.ensure_path(output_dir)
# Take care to keep the name unique so multiple test jobs can run at once.
output_path = os.path.join(output_dir, "blendfile_io_partial.blend")
bpy.data.libraries.write(filepath=output_path, datablocks={ob, unused_mesh}, fake_user=False)
bpy.ops.wm.open_mainfile(filepath=output_path, load_ui=False)
assert self.OBJECT_MESH_NAME in bpy.data.meshes
assert self.OBJECT_MATERIAL_NAME in bpy.data.materials
assert self.OBJECT_NAME in bpy.data.objects
assert self.UNUSED_MESH_NAME in bpy.data.meshes
assert bpy.data.meshes[self.OBJECT_MESH_NAME].users == 1
assert bpy.data.materials[self.OBJECT_MATERIAL_NAME].users == 2
assert bpy.data.objects[self.OBJECT_NAME].users == 0
assert bpy.data.meshes[self.UNUSED_MESH_NAME].users == 0
# NOTE: Technically this should rather be in `bl_id_management.py` test, but that file uses `unittest` module,
# which makes mixing it with tests system used here and passing extra parameters complicated.
# Since the main effect of 'RUNTIME' ID tag is on file save, it can as well be here for now.
class TestIdRuntimeTag(TestHelper):
def __init__(self, args):
self.args = args
def unique_blendfile_name(self, base_name):
return base_name + self.__class__.__name__ + ".blend"
def test_basics(self):
output_dir = self.args.output_dir
self.ensure_path(output_dir)
bpy.ops.wm.read_homefile(use_empty=False, use_factory_startup=True)
obj = bpy.data.objects['Cube']
assert obj.is_runtime_data is False
assert bpy.context.view_layer.depsgraph.ids['Cube'].is_runtime_data
output_work_path = os.path.join(output_dir, self.unique_blendfile_name("blendfile"))
bpy.ops.wm.save_as_mainfile(filepath=output_work_path, check_existing=False, compress=False)
bpy.ops.wm.open_mainfile(filepath=output_work_path, load_ui=False)
obj = bpy.data.objects['Cube']
assert obj.is_runtime_data is False
obj.is_runtime_data = True
assert obj.is_runtime_data
bpy.ops.wm.save_as_mainfile(filepath=output_work_path, check_existing=False, compress=False)
bpy.ops.wm.open_mainfile(filepath=output_work_path, load_ui=False)
assert 'Cube' not in bpy.data.objects
mesh = bpy.data.meshes['Cube']
assert mesh.is_runtime_data is False
assert mesh.users == 0
def test_linking(self):
output_dir = self.args.output_dir
self.ensure_path(output_dir)
bpy.ops.wm.read_homefile(use_empty=False, use_factory_startup=True)
material = bpy.data.materials.new("LibMaterial")
# Use a dummy mesh as user of the material, such that the material is saved
# without having to use fake user on it.
mesh = bpy.data.meshes.new("LibMesh")
mesh.materials.append(material)
mesh.use_fake_user = True
output_lib_path = os.path.join(output_dir, self.unique_blendfile_name("blendlib_runtimetag_basic"))
bpy.ops.wm.save_as_mainfile(filepath=output_lib_path, check_existing=False, compress=False)
bpy.ops.wm.read_homefile(use_empty=False, use_factory_startup=True)
obj = bpy.data.objects['Cube']
assert obj.is_runtime_data is False
obj.is_runtime_data = True
link_dir = os.path.join(output_lib_path, "Material")
bpy.ops.wm.link(directory=link_dir, filename="LibMaterial")
linked_material = bpy.data.materials['LibMaterial']
assert linked_material.is_library_indirect is False
link_dir = os.path.join(output_lib_path, "Mesh")
bpy.ops.wm.link(directory=link_dir, filename="LibMesh", instance_object_data=False)
linked_mesh = bpy.data.meshes['LibMesh']
assert linked_mesh.is_library_indirect is False
assert linked_mesh.use_fake_user is False
obj.data = linked_mesh
obj.material_slots[0].link = 'OBJECT'
obj.material_slots[0].material = linked_material
output_work_path = os.path.join(output_dir, self.unique_blendfile_name("blendfile"))
bpy.ops.wm.save_as_mainfile(filepath=output_work_path, check_existing=False, compress=False)
# Only usage of this linked material is a runtime ID (object),
# so writing .blend file will have properly reset its tag to indirectly linked data.
assert linked_material.is_library_indirect
# Only usage of this linked mesh is a runtime ID (object),
# so writing .blend file will have properly reset its tag to indirectly linked data.
assert linked_mesh.is_library_indirect
bpy.ops.wm.open_mainfile(filepath=output_work_path, load_ui=False)
assert 'Cube' not in bpy.data.objects
assert 'LibMaterial' not in bpy.data.materials
assert 'libMesh' not in bpy.data.meshes
TESTS = (
TestBlendFileSaveLoadBasic,
TestBlendFileSavePartial,
TestIdRuntimeTag,
)
def argparse_create():
import argparse
# When --help or no args are given, print this help
description = "Test basic IO of blend file."
parser = argparse.ArgumentParser(description=description)
parser.add_argument(
"--output-dir",
dest="output_dir",
default=".",
help="Where to output temp saved blendfiles",
required=False,
)
return parser
def main():
args = argparse_create().parse_args()
# Don't write thumbnails into the home directory.
bpy.context.preferences.filepaths.file_preview_type = 'NONE'
for Test in TESTS:
Test(args).run_all_tests()
if __name__ == '__main__':
import sys
sys.argv = [__file__] + (sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else [])
main()
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