The most powerful and modular stable diffusion GUI, api and backend with a graph/nodes interface.
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def is_link(obj):
if not isinstance(obj, list):
return False
if len(obj) != 2:
return False
if not isinstance(obj[0], str):
return False
if not isinstance(obj[1], int) and not isinstance(obj[1], float):
return False
return True
# The GraphBuilder is just a utility class that outputs graphs in the form expected by the ComfyUI back-end
class GraphBuilder:
_default_prefix_root = ""
_default_prefix_call_index = 0
_default_prefix_graph_index = 0
def __init__(self, prefix = None):
if prefix is None:
self.prefix = GraphBuilder.alloc_prefix()
else:
self.prefix = prefix
self.nodes = {}
self.id_gen = 1
@classmethod
def set_default_prefix(cls, prefix_root, call_index, graph_index = 0):
cls._default_prefix_root = prefix_root
cls._default_prefix_call_index = call_index
if graph_index is not None:
cls._default_prefix_graph_index = graph_index
@classmethod
def alloc_prefix(cls, root=None, call_index=None, graph_index=None):
if root is None:
root = GraphBuilder._default_prefix_root
if call_index is None:
call_index = GraphBuilder._default_prefix_call_index
if graph_index is None:
graph_index = GraphBuilder._default_prefix_graph_index
result = "%s.%d.%d." % (root, call_index, graph_index)
GraphBuilder._default_prefix_graph_index += 1
return result
def node(self, class_type, id=None, **kwargs):
if id is None:
id = str(self.id_gen)
self.id_gen += 1
id = self.prefix + id
if id in self.nodes:
return self.nodes[id]
node = Node(id, class_type, kwargs)
self.nodes[id] = node
return node
def lookup_node(self, id):
id = self.prefix + id
return self.nodes.get(id)
def finalize(self):
output = {}
for node_id, node in self.nodes.items():
output[node_id] = node.serialize()
return output
def replace_node_output(self, node_id, index, new_value):
node_id = self.prefix + node_id
to_remove = []
for node in self.nodes.values():
for key, value in node.inputs.items():
if is_link(value) and value[0] == node_id and value[1] == index:
if new_value is None:
to_remove.append((node, key))
else:
node.inputs[key] = new_value
for node, key in to_remove:
del node.inputs[key]
def remove_node(self, id):
id = self.prefix + id
del self.nodes[id]
class Node:
def __init__(self, id, class_type, inputs):
self.id = id
self.class_type = class_type
self.inputs = inputs
self.override_display_id = None
def out(self, index):
return [self.id, index]
def set_input(self, key, value):
if value is None:
if key in self.inputs:
del self.inputs[key]
else:
self.inputs[key] = value
def get_input(self, key):
return self.inputs.get(key)
def set_override_display_id(self, override_display_id):
self.override_display_id = override_display_id
def serialize(self):
serialized = {
"class_type": self.class_type,
"inputs": self.inputs
}
if self.override_display_id is not None:
serialized["override_display_id"] = self.override_display_id
return serialized
def add_graph_prefix(graph, outputs, prefix):
# Change the node IDs and any internal links
new_graph = {}
for node_id, node_info in graph.items():
# Make sure the added nodes have unique IDs
new_node_id = prefix + node_id
new_node = { "class_type": node_info["class_type"], "inputs": {} }
for input_name, input_value in node_info.get("inputs", {}).items():
if is_link(input_value):
new_node["inputs"][input_name] = [prefix + input_value[0], input_value[1]]
else:
new_node["inputs"][input_name] = input_value
new_graph[new_node_id] = new_node
# Change the node IDs in the outputs
new_outputs = []
for n in range(len(outputs)):
output = outputs[n]
if is_link(output):
new_outputs.append([prefix + output[0], output[1]])
else:
new_outputs.append(output)
return new_graph, tuple(new_outputs)