fix: compositor working

multi_user/__init__.py

@@ -21,7 +21,7 @@ bl_info = {
     "author": "Swann Martinez",
     "version": (0, 5, 0),
     "description": "Enable real-time collaborative workflow inside blender",
-    "blender": (2, 82, 0),
+    "blender": (2, 93, 0),
     "location": "3D View > Sidebar > Multi-User tab",
     "warning": "Unstable addon, use it at your own risks",
     "category": "Collaboration",

multi_user/bl_types/__init__.py

@@ -41,6 +41,7 @@ __all__ = [
     'bl_node_group',
     'bl_texture',
     "bl_particle",
+    # 'bl_compositor',
 ]  # Order here defines execution order
 
 if bpy.app.version[1] >= 91:

multi_user/bl_types/bl_compositor.py

@@ -0,0 +1,81 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+import bpy
+import mathutils
+import logging
+import re
+
+from uuid import uuid4
+
+from .dump_anything import Loader, Dumper
+from replication.protocol import ReplicatedDatablock
+
+from .bl_datablock import get_datablock_from_uuid, resolve_datablock_from_uuid
+from .bl_action import dump_animation_data, load_animation_data, resolve_animation_dependencies
+from .node_tree import load_node_tree, dump_node_tree, get_node_tree_dependencies
+
+class BlCompositor(ReplicatedDatablock):
+    bl_id = "compositor"
+    bl_class = bpy.types.CompositorNodeTree
+    bl_check_common = True
+    bl_icon = 'COMPOSITOR_NODE'
+    bl_reload_parent = False
+
+    @staticmethod
+    def construct(data: dict) -> object:
+        return bpy.data.scenes["Scene"].node_tree # TODO: resolve_datablock_from_uuid for multiple scenes
+
+    @staticmethod
+    def load(data: dict, datablock: object):
+        load_animation_data(data.get('animation_data'), datablock)
+        loader = Loader()
+        loader.load(datablock, data)
+        load_node_tree(data['node_tree'], datablock)
+
+    @staticmethod
+    def dump(datablock: object) -> dict:
+        comp_dumper = Dumper()
+        comp_dumper.depth = 1
+        comp_dumper.include_filter = [
+            'use_nodes',
+            'name',
+        ]
+        data = comp_dumper.dump(datablock)
+
+        data['node_tree'] = dump_node_tree(datablock)
+
+        data['animation_data'] = dump_animation_data(datablock)
+        return data
+
+    @staticmethod
+    def resolve(data: dict) -> object:
+        uuid = data.get('uuid')
+        return resolve_datablock_from_uuid(uuid, bpy.data.scenes["Scene"].node_tree)
+
+    @staticmethod
+    def resolve_deps(datablock: object) -> [object]:
+        deps = []
+
+        deps.extend(get_node_tree_dependencies(datablock))
+
+        deps.extend(resolve_animation_dependencies(datablock))
+
+        return deps
+
+_type = bpy.types.CompositorNodeTree
+_class = BlCompositor

multi_user/bl_types/bl_material.py

@@ -28,342 +28,7 @@ from replication.protocol import ReplicatedDatablock
 
 from .bl_datablock import get_datablock_from_uuid, resolve_datablock_from_uuid
 from .bl_action import dump_animation_data, load_animation_data, resolve_animation_dependencies
-
-NODE_SOCKET_INDEX = re.compile('\[(\d*)\]')
-IGNORED_SOCKETS = ['GEOMETRY', 'SHADER', 'CUSTOM']
-
-def load_node(node_data: dict, node_tree: bpy.types.ShaderNodeTree):
-    """ Load a node into a node_tree from a dict
-
-        :arg node_data: dumped node data
-        :type node_data: dict
-        :arg node_tree: target node_tree
-        :type node_tree: bpy.types.NodeTree
-    """
-    loader = Loader()
-    target_node = node_tree.nodes.new(type=node_data["bl_idname"])
-    target_node.select = False
-    loader.load(target_node, node_data)
-    image_uuid = node_data.get('image_uuid', None)
-    node_tree_uuid = node_data.get('node_tree_uuid', None)
-
-    if image_uuid and not target_node.image:
-        image = resolve_datablock_from_uuid(image_uuid, bpy.data.images)
-        if image is None:
-            logging.error(f"Fail to find material image from uuid {image_uuid}")
-        else:
-            target_node.image = image
-
-    if node_tree_uuid:
-        target_node.node_tree = get_datablock_from_uuid(node_tree_uuid, None)
-
-    inputs_data = node_data.get('inputs')
-    if inputs_data:
-        inputs = [i for i in target_node.inputs if i.type not in IGNORED_SOCKETS]
-        for idx, inpt in enumerate(inputs):
-            if idx < len(inputs_data) and hasattr(inpt, "default_value"):
-                loaded_input = inputs_data[idx]
-                try:
-                    if inpt.type in ['OBJECT', 'COLLECTION']:
-                        inpt.default_value = get_datablock_from_uuid(loaded_input, None)
-                    else:
-                        inpt.default_value = loaded_input
-                except Exception as e:
-                    logging.warning(f"Node {target_node.name} input {inpt.name} parameter not supported, skipping ({e})")
-            else:
-                logging.warning(f"Node {target_node.name} input length mismatch.")
-
-    outputs_data = node_data.get('outputs')
-    if outputs_data:
-        outputs = [o for o in target_node.outputs if o.type not in IGNORED_SOCKETS]
-        for idx, output in enumerate(outputs):
-            if idx < len(outputs_data) and hasattr(output, "default_value"):
-                loaded_output = outputs_data[idx]
-                try:
-                    if output.type in ['OBJECT', 'COLLECTION']:
-                        output.default_value = get_datablock_from_uuid(loaded_output, None)
-                    else:
-                        output.default_value = loaded_output
-                except Exception as e:
-                    logging.warning(
-                        f"Node {target_node.name} output {output.name} parameter not supported, skipping ({e})")
-            else:
-                logging.warning(
-                    f"Node {target_node.name} output length mismatch.")
-
-
-def dump_node(node: bpy.types.ShaderNode) -> dict:
-    """ Dump a single node to a dict
-
-        :arg node: target node
-        :type node: bpy.types.Node
-        :retrun: dict
-    """
-
-    node_dumper = Dumper()
-    node_dumper.depth = 1
-    node_dumper.exclude_filter = [
-        "dimensions",
-        "show_expanded",
-        "name_full",
-        "select",
-        "bl_label",
-        "bl_height_min",
-        "bl_height_max",
-        "bl_height_default",
-        "bl_width_min",
-        "bl_width_max",
-        "type",
-        "bl_icon",
-        "bl_width_default",
-        "bl_static_type",
-        "show_tetxure",
-        "is_active_output",
-        "hide",
-        "show_options",
-        "show_preview",
-        "show_texture",
-        "outputs",
-        "width_hidden",
-        "image"
-    ]
-
-    dumped_node = node_dumper.dump(node)
-
-    if node.parent:
-        dumped_node['parent'] = node.parent.name
-
-    dump_io_needed = (node.type not in ['REROUTE', 'OUTPUT_MATERIAL'])
-
-    if dump_io_needed:
-        io_dumper = Dumper()
-        io_dumper.depth = 2
-        io_dumper.include_filter = ["default_value"]
-
-        if hasattr(node, 'inputs'):
-            dumped_node['inputs'] = []
-            inputs = [i for i in node.inputs if i.type not in IGNORED_SOCKETS]
-            for idx, inpt in enumerate(inputs):
-                if hasattr(inpt, 'default_value'):
-                    if isinstance(inpt.default_value, bpy.types.ID):
-                        dumped_input = inpt.default_value.uuid
-                    else:
-                        dumped_input = io_dumper.dump(inpt.default_value)
-
-                    dumped_node['inputs'].append(dumped_input)
-
-        if hasattr(node, 'outputs'):
-            dumped_node['outputs'] = []
-            for idx, output in enumerate(node.outputs):
-                if output.type not in IGNORED_SOCKETS:
-                    if hasattr(output, 'default_value'):
-                        dumped_node['outputs'].append(
-                            io_dumper.dump(output.default_value))
-
-    if hasattr(node, 'color_ramp'):
-        ramp_dumper = Dumper()
-        ramp_dumper.depth = 4
-        ramp_dumper.include_filter = [
-            'elements',
-            'alpha',
-            'color',
-            'position',
-            'interpolation',
-            'hue_interpolation',
-            'color_mode'
-        ]
-        dumped_node['color_ramp'] = ramp_dumper.dump(node.color_ramp)
-    if hasattr(node, 'mapping'):
-        curve_dumper = Dumper()
-        curve_dumper.depth = 5
-        curve_dumper.include_filter = [
-            'curves',
-            'points',
-            'location'
-        ]
-        dumped_node['mapping'] = curve_dumper.dump(node.mapping)
-    if hasattr(node, 'image') and getattr(node, 'image'):
-        dumped_node['image_uuid'] = node.image.uuid
-    if hasattr(node, 'node_tree') and getattr(node, 'node_tree'):
-        dumped_node['node_tree_uuid'] = node.node_tree.uuid
-    return dumped_node
-
-
-
-def load_links(links_data, node_tree):
-    """ Load node_tree links from a list
-
-        :arg links_data: dumped node links
-        :type links_data: list
-        :arg node_tree: node links collection
-        :type node_tree: bpy.types.NodeTree
-    """
-
-    for link in links_data:
-        input_socket = node_tree.nodes[link['to_node']
-                                       ].inputs[int(link['to_socket'])]
-        output_socket = node_tree.nodes[link['from_node']].outputs[int(
-            link['from_socket'])]
-        node_tree.links.new(input_socket, output_socket)
-
-
-def dump_links(links):
-    """ Dump node_tree links collection to a list
-
-        :arg links: node links collection
-        :type links: bpy.types.NodeLinks
-        :retrun: list
-    """
-
-    links_data = []
-
-    for link in links:
-        to_socket = NODE_SOCKET_INDEX.search(
-            link.to_socket.path_from_id()).group(1)
-        from_socket = NODE_SOCKET_INDEX.search(
-            link.from_socket.path_from_id()).group(1)
-        links_data.append({
-            'to_node': link.to_node.name,
-            'to_socket': to_socket,
-            'from_node': link.from_node.name,
-            'from_socket': from_socket,
-        })
-
-    return links_data
-
-
-def dump_node_tree(node_tree: bpy.types.ShaderNodeTree) -> dict:
-    """ Dump a shader node_tree to a dict including links and nodes
-
-        :arg node_tree: dumped shader node tree
-        :type node_tree: bpy.types.ShaderNodeTree
-        :return: dict
-    """
-    node_tree_data = {
-        'nodes': {node.name: dump_node(node) for node in node_tree.nodes},
-        'links': dump_links(node_tree.links),
-        'name': node_tree.name,
-        'type': type(node_tree).__name__
-    }
-
-    for socket_id in ['inputs', 'outputs']:
-        socket_collection = getattr(node_tree, socket_id)
-        node_tree_data[socket_id] = dump_node_tree_sockets(socket_collection)
-
-    return node_tree_data
-
-
-def dump_node_tree_sockets(sockets: bpy.types.Collection) -> dict:
-    """ dump sockets of a shader_node_tree
-
-        :arg target_node_tree: target node_tree
-        :type target_node_tree: bpy.types.NodeTree
-        :arg socket_id: socket identifer 
-        :type socket_id: str
-        :return: dict
-    """
-    sockets_data = []
-    for socket in sockets:
-        try:
-            socket_uuid = socket['uuid']
-        except Exception:
-            socket_uuid = str(uuid4())
-            socket['uuid'] = socket_uuid
-
-        sockets_data.append((socket.name, socket.bl_socket_idname, socket_uuid))
-
-    return sockets_data
-
-
-def load_node_tree_sockets(sockets: bpy.types.Collection,
-                           sockets_data: dict):
-    """ load sockets of a shader_node_tree
-
-        :arg target_node_tree: target node_tree
-        :type target_node_tree: bpy.types.NodeTree
-        :arg socket_id: socket identifer 
-        :type socket_id: str
-        :arg socket_data: dumped socket data
-        :type socket_data: dict
-    """
-    # Check for removed sockets
-    for socket in sockets:
-        if not [s for s in sockets_data if 'uuid' in socket and socket['uuid'] == s[2]]:
-            sockets.remove(socket)
-
-    # Check for new sockets
-    for idx, socket_data in enumerate(sockets_data):
-        try:
-            checked_socket = sockets[idx]
-            if checked_socket.name != socket_data[0]:
-                checked_socket.name = socket_data[0]
-        except Exception:
-            s = sockets.new(socket_data[1], socket_data[0])
-            s['uuid'] = socket_data[2]
-
-
-def load_node_tree(node_tree_data: dict, target_node_tree: bpy.types.ShaderNodeTree) -> dict:
-    """Load a shader node_tree from dumped data
-
-        :arg node_tree_data: dumped node data
-        :type node_tree_data: dict
-        :arg target_node_tree: target node_tree
-        :type target_node_tree: bpy.types.NodeTree
-    """
-    # TODO: load only required nodes
-    target_node_tree.nodes.clear()
-
-    if not target_node_tree.is_property_readonly('name'):
-        target_node_tree.name = node_tree_data['name']
-
-    if 'inputs' in node_tree_data:
-        socket_collection = getattr(target_node_tree, 'inputs')
-        load_node_tree_sockets(socket_collection, node_tree_data['inputs'])
-
-    if 'outputs' in node_tree_data:
-        socket_collection = getattr(target_node_tree,  'outputs')
-        load_node_tree_sockets(socket_collection, node_tree_data['outputs'])
-
-    # Load nodes
-    for node in node_tree_data["nodes"]:
-        load_node(node_tree_data["nodes"][node], target_node_tree)
-
-    for node_id, node_data in node_tree_data["nodes"].items():
-        target_node = target_node_tree.nodes.get(node_id, None)
-        if target_node is None:
-            continue
-        elif 'parent' in node_data:
-            target_node.parent =  target_node_tree.nodes[node_data['parent']]
-        else:
-            target_node.parent = None
-    # TODO: load only required nodes links
-    # Load nodes links
-    target_node_tree.links.clear()
-
-    load_links(node_tree_data["links"], target_node_tree)
-
-
-def get_node_tree_dependencies(node_tree: bpy.types.NodeTree) -> list:
-    def has_image(node): return (
-        node.type in ['TEX_IMAGE', 'TEX_ENVIRONMENT'] and node.image)
-
-    def has_node_group(node): return (
-        hasattr(node, 'node_tree') and node.node_tree)
-
-    def has_texture(node): return (
-        node.type in ['ATTRIBUTE_SAMPLE_TEXTURE','TEXTURE']  and node.texture)
-    deps = []
-
-    for node in node_tree.nodes:
-        if has_image(node):
-            deps.append(node.image)
-        elif has_node_group(node):
-            deps.append(node.node_tree)
-        elif has_texture(node):
-            deps.append(node.texture)
-
-    return deps
-
+from .node_tree import load_node_tree, dump_node_tree, get_node_tree_dependencies
 
 def dump_materials_slots(materials: bpy.types.bpy_prop_collection) -> list:
     """ Dump material slots collection

multi_user/bl_types/bl_object.py

@@ -24,7 +24,7 @@ from replication.exception import ContextError
 
 from replication.protocol import ReplicatedDatablock
 from .bl_datablock import get_datablock_from_uuid, resolve_datablock_from_uuid
-from .bl_material import IGNORED_SOCKETS
+from .node_tree import IGNORED_SOCKETS
 from ..utils import get_preferences
 from .bl_action import dump_animation_data, load_animation_data, resolve_animation_dependencies
 from .dump_anything import (

multi_user/bl_types/bl_particle.py

@@ -3,8 +3,7 @@ import mathutils
 
 from . import dump_anything
 from replication.protocol import ReplicatedDatablock
-from .bl_datablock import get_datablock_from_uuid
-from .bl_datablock import resolve_datablock_from_uuid
+from .bl_datablock import get_datablock_from_uuid, resolve_datablock_from_uuid
 from .bl_action import dump_animation_data, load_animation_data, resolve_animation_dependencies
 
 

multi_user/bl_types/bl_scene.py

@@ -19,6 +19,7 @@
 import logging
 from pathlib import Path
 from uuid import uuid4
+import re
 
 import bpy
 import mathutils
@@ -29,10 +30,12 @@ from replication.protocol import ReplicatedDatablock
 from ..utils import flush_history, get_preferences
 from .bl_action import (dump_animation_data, load_animation_data,
                         resolve_animation_dependencies)
+from .node_tree import (get_node_tree_dependencies, load_node_tree,
+                          dump_node_tree)
 from .bl_collection import (dump_collection_children, dump_collection_objects,
                             load_collection_childrens, load_collection_objects,
                             resolve_collection_dependencies)
-from .bl_datablock import resolve_datablock_from_uuid
+from .bl_datablock import get_datablock_from_uuid, resolve_datablock_from_uuid
 from .bl_file import get_filepath
 from .dump_anything import Dumper, Loader
 
@@ -303,7 +306,6 @@ def dump_sequence(sequence: bpy.types.Sequence) -> dict:
 
     return data
 
-
 def load_sequence(sequence_data: dict,
                   sequence_editor: bpy.types.SequenceEditor):
     """ Load sequence from dumped data
@@ -370,7 +372,6 @@ def load_sequence(sequence_data: dict,
     loader.load(sequence, sequence_data)
     sequence.select = False
 
-
 class BlScene(ReplicatedDatablock):
     is_root = True
     use_delta = True
@@ -447,6 +448,14 @@ class BlScene(ReplicatedDatablock):
 
         # FIXME: Find a better way after the replication big refacotoring
         # Keep other user from deleting collection object by flushing their history
+        
+        # Compositor
+        if data["use_nodes"]:
+            if datablock.node_tree is None:
+                datablock.use_nodes = True
+
+            load_node_tree(data['node_tree'], datablock.node_tree)
+
         flush_history()
 
     @staticmethod
@@ -458,6 +467,7 @@ class BlScene(ReplicatedDatablock):
         scene_dumper = Dumper()
         scene_dumper.depth = 1
         scene_dumper.include_filter = [
+            'use_nodes',
             'name',
             'world',
             'id',
@@ -516,6 +526,11 @@ class BlScene(ReplicatedDatablock):
             for seq in vse.sequences_all:
                 dumped_sequences[seq.name] = dump_sequence(seq)
             data['sequences'] = dumped_sequences
+        
+        # Compositor
+        if datablock.use_nodes:
+            data['node_tree'] = dump_node_tree(datablock.node_tree)
+        data['animation_data'] = dump_animation_data(datablock)
 
         return data
 
@@ -550,6 +565,12 @@ class BlScene(ReplicatedDatablock):
                             Path(bpy.path.abspath(sequence.directory),
                             elem.filename))
 
+        # Compositor
+        if datablock.use_nodes:
+            deps.extend(get_node_tree_dependencies(datablock.node_tree))
+
+        deps.extend(resolve_animation_dependencies(datablock))
+
         return deps
 
     @staticmethod

multi_user/bl_types/bl_world.py

@@ -21,7 +21,7 @@ import mathutils
 
 from .dump_anything import Loader, Dumper
 from replication.protocol import ReplicatedDatablock
-from .bl_material import (load_node_tree,
+from .node_tree import (load_node_tree,
                           dump_node_tree,
                           get_node_tree_dependencies)
 

multi_user/bl_types/node_tree.py

@@ -0,0 +1,362 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+import bpy
+import mathutils
+import logging
+import re
+
+from uuid import uuid4
+
+from .dump_anything import Loader, Dumper
+
+from .bl_datablock import get_datablock_from_uuid, resolve_datablock_from_uuid
+
+IGNORED_SOCKETS = ['GEOMETRY', 'SHADER', 'CUSTOM']
+NODE_SOCKET_INDEX = re.compile('\[(\d*)\]')
+
+def load_node(node_data: dict, node_tree: bpy.types.NodeTree):
+    """ Load a node into a node_tree from a dict
+
+        :arg node_data: dumped node data
+        :type node_data: dict
+        :arg node_tree: target node_tree
+        :type node_tree: bpy.types.NodeTree
+    """
+    loader = Loader()
+    target_node = node_tree.nodes.new(type=node_data["bl_idname"])
+    target_node.select = False
+    loader.load(target_node, node_data)
+    image_uuid = node_data.get('image_uuid', None)
+    node_tree_uuid = node_data.get('node_tree_uuid', None)
+
+    if image_uuid and not target_node.image:
+        image = resolve_datablock_from_uuid(image_uuid, bpy.data.images)
+        if image is None:
+            logging.error(f"Fail to find material image from uuid {image_uuid}")
+        else:
+            target_node.image = image
+
+    if node_tree_uuid:
+        target_node.node_tree = get_datablock_from_uuid(node_tree_uuid, None)
+
+    inputs_data = node_data.get('inputs')
+    if inputs_data:
+        inputs = [i for i in target_node.inputs if i.type not in IGNORED_SOCKETS]
+        for idx, inpt in enumerate(inputs):
+            if idx < len(inputs_data) and hasattr(inpt, "default_value"):
+                loaded_input = inputs_data[idx]
+                try:
+                    if inpt.type in ['OBJECT', 'COLLECTION']:
+                        inpt.default_value = get_datablock_from_uuid(loaded_input, None)
+                    else:
+                        inpt.default_value = loaded_input
+                except Exception as e:
+                    logging.warning(f"Node {target_node.name} input {inpt.name} parameter not supported, skipping ({e})")
+            else:
+                logging.warning(f"Node {target_node.name} input length mismatch.")
+
+    outputs_data = node_data.get('outputs')
+    if outputs_data:
+        outputs = [o for o in target_node.outputs if o.type not in IGNORED_SOCKETS]
+        for idx, output in enumerate(outputs):
+            if idx < len(outputs_data) and hasattr(output, "default_value"):
+                loaded_output = outputs_data[idx]
+                try:
+                    if output.type in ['OBJECT', 'COLLECTION']:
+                        output.default_value = get_datablock_from_uuid(loaded_output, None)
+                    else:
+                        output.default_value = loaded_output
+                except Exception as e:
+                    logging.warning(
+                        f"Node {target_node.name} output {output.name} parameter not supported, skipping ({e})")
+            else:
+                logging.warning(
+                    f"Node {target_node.name} output length mismatch.")
+
+
+def dump_node(node: bpy.types.Node) -> dict:
+    """ Dump a single node to a dict
+
+        :arg node: target node
+        :type node: bpy.types.Node
+        :retrun: dict
+    """
+
+    node_dumper = Dumper()
+    node_dumper.depth = 1
+    node_dumper.exclude_filter = [
+        "dimensions",
+        "show_expanded",
+        "name_full",
+        "select",
+        "bl_label",
+        "bl_height_min",
+        "bl_height_max",
+        "bl_height_default",
+        "bl_width_min",
+        "bl_width_max",
+        "type",
+        "bl_icon",
+        "bl_width_default",
+        "bl_static_type",
+        "show_tetxure",
+        "is_active_output",
+        "hide",
+        "show_options",
+        "show_preview",
+        "show_texture",
+        "outputs",
+        "width_hidden",
+        "image"
+    ]
+
+    dumped_node = node_dumper.dump(node)
+
+    if node.parent:
+        dumped_node['parent'] = node.parent.name
+
+    dump_io_needed = (node.type not in ['REROUTE', 'OUTPUT_MATERIAL'])
+
+        
+    if dump_io_needed:
+        io_dumper = Dumper()
+        io_dumper.depth = 2
+        io_dumper.include_filter = ["default_value"]
+
+        if hasattr(node, 'inputs'):
+            dumped_node['inputs'] = []
+            inputs = [i for i in node.inputs if i.type not in IGNORED_SOCKETS]
+            for idx, inpt in enumerate(inputs):
+                if hasattr(inpt, 'default_value'):
+                    if isinstance(inpt.default_value, bpy.types.ID):
+                        dumped_input = inpt.default_value.uuid
+                    else:
+                        dumped_input = io_dumper.dump(inpt.default_value)
+
+                    dumped_node['inputs'].append(dumped_input)
+
+        if hasattr(node, 'outputs'):
+            dumped_node['outputs'] = []
+            for idx, output in enumerate(node.outputs):
+                if output.type not in IGNORED_SOCKETS:
+                    if hasattr(output, 'default_value'):
+                        dumped_node['outputs'].append(
+                            io_dumper.dump(output.default_value))
+
+    if hasattr(node, 'color_ramp'):
+        ramp_dumper = Dumper()
+        ramp_dumper.depth = 4
+        ramp_dumper.include_filter = [
+            'elements',
+            'alpha',
+            'color',
+            'position',
+            'interpolation',
+            'hue_interpolation',
+            'color_mode'
+        ]
+        dumped_node['color_ramp'] = ramp_dumper.dump(node.color_ramp)
+    if hasattr(node, 'mapping'):
+        curve_dumper = Dumper()
+        curve_dumper.depth = 5
+        curve_dumper.include_filter = [
+            'curves',
+            'points',
+            'location'
+        ]
+        dumped_node['mapping'] = curve_dumper.dump(node.mapping)
+    if hasattr(node, 'image') and getattr(node, 'image'):
+        dumped_node['image_uuid'] = node.image.uuid
+    if hasattr(node, 'node_tree') and getattr(node, 'node_tree'):
+        dumped_node['node_tree_uuid'] = node.node_tree.uuid
+    return dumped_node
+
+
+def load_links(links_data, node_tree):
+    """ Load node_tree links from a list
+
+        :arg links_data: dumped node links
+        :type links_data: list
+        :arg node_tree: node links collection
+        :type node_tree: bpy.types.NodeTree
+    """
+
+    for link in links_data:
+        input_socket = node_tree.nodes[link['to_node']
+                                       ].inputs[int(link['to_socket'])]
+        output_socket = node_tree.nodes[link['from_node']].outputs[int(
+            link['from_socket'])]
+        node_tree.links.new(input_socket, output_socket)
+
+
+def dump_links(links):
+    """ Dump node_tree links collection to a list
+
+        :arg links: node links collection
+        :type links: bpy.types.NodeLinks
+        :retrun: list
+    """
+
+    links_data = []
+
+    for link in links:
+        to_socket = NODE_SOCKET_INDEX.search(
+            link.to_socket.path_from_id()).group(1)
+        from_socket = NODE_SOCKET_INDEX.search(
+            link.from_socket.path_from_id()).group(1)
+        links_data.append({
+            'to_node': link.to_node.name,
+            'to_socket': to_socket,
+            'from_node': link.from_node.name,
+            'from_socket': from_socket,
+        })
+
+    return links_data
+
+
+def dump_node_tree(node_tree: bpy.types.NodeTree) -> dict:
+    """ Dump a node_tree to a dict including links and nodes
+
+        :arg node_tree: dumped  node tree
+        :type node_tree: bpy.types.NodeTree
+        :return: dict
+    """
+    node_tree_data = {
+        'nodes': {node.name: dump_node(node) for node in node_tree.nodes},
+        'links': dump_links(node_tree.links),
+        'name': node_tree.name,
+        'type': type(node_tree).__name__
+    }
+
+    for socket_id in ['inputs', 'outputs']:
+        socket_collection = getattr(node_tree, socket_id)
+        node_tree_data[socket_id] = dump_node_tree_sockets(socket_collection)
+
+    return node_tree_data
+
+
+def dump_node_tree_sockets(sockets: bpy.types.Collection) -> dict:
+    """ dump sockets of a shader_node_tree
+
+        :arg target_node_tree: target node_tree
+        :type target_node_tree: bpy.types.NodeTree
+        :arg socket_id: socket identifer 
+        :type socket_id: str
+        :return: dict
+    """
+    sockets_data = []
+    for socket in sockets:
+        try:
+            socket_uuid = socket['uuid']
+        except Exception:
+            socket_uuid = str(uuid4())
+            socket['uuid'] = socket_uuid
+
+        sockets_data.append((socket.name, socket.bl_socket_idname, socket_uuid))
+
+    return sockets_data
+
+
+def load_node_tree_sockets(sockets: bpy.types.Collection,
+                           sockets_data: dict):
+    """ load sockets of a shader_node_tree
+
+        :arg target_node_tree: target node_tree
+        :type target_node_tree: bpy.types.NodeTree
+        :arg socket_id: socket identifer 
+        :type socket_id: str
+        :arg socket_data: dumped socket data
+        :type socket_data: dict
+    """
+    # Check for removed sockets
+    for socket in sockets:
+        if not [s for s in sockets_data if 'uuid' in socket and socket['uuid'] == s[2]]:
+            sockets.remove(socket)
+
+    # Check for new sockets
+    for idx, socket_data in enumerate(sockets_data):
+        try:
+            checked_socket = sockets[idx]
+            if checked_socket.name != socket_data[0]:
+                checked_socket.name = socket_data[0]
+        except Exception:
+            s = sockets.new(socket_data[1], socket_data[0])
+            s['uuid'] = socket_data[2]
+
+
+def load_node_tree(node_tree_data: dict, target_node_tree: bpy.types.NodeTree) -> dict:
+    """Load a shader node_tree from dumped data
+
+        :arg node_tree_data: dumped node data
+        :type node_tree_data: dict
+        :arg target_node_tree: target node_tree
+        :type target_node_tree: bpy.types.NodeTree
+    """
+    # TODO: load only required nodes
+    target_node_tree.nodes.clear()
+
+    if not target_node_tree.is_property_readonly('name'):
+        target_node_tree.name = node_tree_data['name']
+
+    if 'inputs' in node_tree_data:
+        socket_collection = getattr(target_node_tree, 'inputs')
+        load_node_tree_sockets(socket_collection, node_tree_data['inputs'])
+
+    if 'outputs' in node_tree_data:
+        socket_collection = getattr(target_node_tree,  'outputs')
+        load_node_tree_sockets(socket_collection, node_tree_data['outputs'])
+
+    # Load nodes
+    for node in node_tree_data["nodes"]:
+        load_node(node_tree_data["nodes"][node], target_node_tree)
+
+    for node_id, node_data in node_tree_data["nodes"].items():
+        target_node = target_node_tree.nodes.get(node_id, None)
+        if target_node is None:
+            continue
+        elif 'parent' in node_data:
+            target_node.parent =  target_node_tree.nodes[node_data['parent']]
+        else:
+            target_node.parent = None
+    # TODO: load only required nodes links
+    # Load nodes links
+    target_node_tree.links.clear()
+
+    load_links(node_tree_data["links"], target_node_tree)
+
+
+def get_node_tree_dependencies(node_tree: bpy.types.NodeTree) -> list:
+    def has_image(node): return (
+        node.type in ['TEX_IMAGE', 'TEX_ENVIRONMENT','IMAGE','R_LAYER'] and node.image)
+
+    def has_node_group(node): return (
+        hasattr(node, 'node_tree') and node.node_tree)
+
+    def has_texture(node): return (
+        node.type in ['ATTRIBUTE_SAMPLE_TEXTURE','TEXTURE']  and node.texture)
+    deps = []
+
+    for node in node_tree.nodes:
+        if has_image(node):
+            deps.append(node.image)
+        elif has_node_group(node):
+            deps.append(node.node_tree)
+        elif has_texture(node):
+            deps.append(node.texture)
+
+    return deps

tests/test_bl_types/test_material.py

@@ -8,7 +8,7 @@ from multi_user.bl_types.bl_material import BlMaterial
 
 
 def test_material_nodes(clear_blend):
-    nodes_types = [node.bl_rna.identifier for node in bpy.types.ShaderNode.__subclasses__()]
+    nodes_types = [node.bl_rna.identifier for node in bpy.types.ShaderNode.__subclasses__()] # Faire un peu comme ici
 
     datablock = bpy.data.materials.new("test")
     datablock.use_nodes = True

tests/test_bl_types/test_scene.py

@@ -11,7 +11,8 @@ from multi_user.utils import get_preferences
 def test_scene(clear_blend):
     get_preferences().sync_flags.sync_render_settings = True
 
-    datablock = bpy.data.scenes.new("toto")
+    # datablock = bpy.data.scenes.new("toto") # TODO: trouver datablock -> active compositing 'Use nodes'
+    datablock = bpy.data.scenes["Scene"].use_nodes
     datablock.view_settings.use_curve_mapping = True
     # Test
     implementation = BlScene()