257 lines
11 KiB
Python
257 lines
11 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-only
|
|
# Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
|
|
|
|
"""Diffusion ControlNet support: family-gated discovery of ControlNet models, resolution to
|
|
a loadable diffusers repo/dir, control-image preprocessing, and a capability gate.
|
|
|
|
Mirrors ``diffusion_lora.py``. Two differences from LoRA: (1) a ControlNet is a full diffusers
|
|
repo (loaded via ``from_pretrained``), not a single-file adapter, so resolution yields a repo id
|
|
or local directory rather than a file path; (2) ControlNet needs a spatial *control image*, which
|
|
is either supplied already-preprocessed ("passthrough", as in ComfyUI where preprocessing is a
|
|
separate step) or derived here ("canny", a dependency-free edge map).
|
|
|
|
ControlNet models are architecture-specific (a FLUX ControlNet cannot drive a Qwen base), so
|
|
discovery is family-gated exactly like the LoRA picker. The request never carries a filesystem
|
|
path -- only a discovery id or a public ``owner/name`` repo id -- so a client cannot make the
|
|
backend read an arbitrary location.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
import re
|
|
from dataclasses import dataclass
|
|
from pathlib import Path
|
|
from typing import Any, Optional
|
|
|
|
from utils.paths.storage_roots import studio_root
|
|
|
|
# Control map types. "passthrough": the supplied image IS the control map (a depth/pose/etc.
|
|
# map produced elsewhere). "canny": derive an edge map here (no heavy detector dependency).
|
|
CONTROL_TYPES = ("passthrough", "canny")
|
|
|
|
# Families whose diffusers pipeline supports ControlNet (declared in diffusion_families via
|
|
# controlnet_pipeline_class). Native sd.cpp ControlNet is a follow-up. Torchao fp8/int8 dense
|
|
# and GGUF-via-diffusers are gated off, same rule as LoRA.
|
|
_DIFFUSERS_BLOCKED_QUANT = ("int8", "fp8", "nvfp4", "mxfp8")
|
|
|
|
|
|
@dataclass(frozen = True)
|
|
class ControlNetCatalogEntry:
|
|
"""One discoverable ControlNet model."""
|
|
|
|
id: str
|
|
display_name: str
|
|
source: str # "local" | "hub"
|
|
families: tuple[str, ...] = () # compatible family names (empty = shown, not gated)
|
|
repo_id: Optional[str] = None # for source == "hub"
|
|
local_path: Optional[str] = None # for source == "local"
|
|
control_types: tuple[str, ...] = ("passthrough",) # recommended control types
|
|
is_union: bool = False # a single model covering many control modes
|
|
|
|
|
|
@dataclass(frozen = True)
|
|
class ResolvedControlNet:
|
|
"""A ControlNet resolved to something ``from_pretrained`` can load."""
|
|
|
|
id: str
|
|
path: str # repo id (hub) or local directory
|
|
is_local: bool
|
|
|
|
|
|
# Curated, family-tagged catalog. Union models (one model, many control modes) dominate real
|
|
# usage, so they are the default picks. Extend as more are curated; local dirs + a bare public
|
|
# ``owner/name`` repo id also work.
|
|
_CURATED: tuple[ControlNetCatalogEntry, ...] = (
|
|
ControlNetCatalogEntry(
|
|
id = "flux-union-pro",
|
|
display_name = "FLUX.1 ControlNet Union Pro (Shakker-Labs)",
|
|
source = "hub",
|
|
families = ("flux.1",),
|
|
repo_id = "Shakker-Labs/FLUX.1-dev-ControlNet-Union-Pro",
|
|
control_types = ("canny", "depth", "pose", "passthrough"),
|
|
is_union = True,
|
|
),
|
|
ControlNetCatalogEntry(
|
|
id = "qwen-union",
|
|
display_name = "Qwen-Image ControlNet Union (InstantX)",
|
|
source = "hub",
|
|
families = ("qwen-image",),
|
|
repo_id = "InstantX/Qwen-Image-ControlNet-Union",
|
|
control_types = ("canny", "depth", "pose", "passthrough"),
|
|
is_union = True,
|
|
),
|
|
)
|
|
|
|
|
|
def controlnets_dir() -> Path:
|
|
"""Local directory Studio scans for user-provided ControlNet model folders."""
|
|
d = studio_root() / "controlnets" / "diffusion"
|
|
d.mkdir(parents = True, exist_ok = True)
|
|
return d
|
|
|
|
|
|
def sanitize_id(raw: str) -> str:
|
|
"""Filesystem-safe id from a repo id / folder name."""
|
|
stem = raw.rsplit("/", 1)[-1]
|
|
stem = re.sub(r"[^A-Za-z0-9._-]+", "_", stem).strip("._-")
|
|
return stem or "controlnet"
|
|
|
|
|
|
def _scan_local() -> list[ControlNetCatalogEntry]:
|
|
"""A local ControlNet is a directory containing a diffusers config + weights."""
|
|
entries: list[ControlNetCatalogEntry] = []
|
|
root = controlnets_dir()
|
|
try:
|
|
children = sorted(root.iterdir())
|
|
except OSError:
|
|
return entries
|
|
for p in children:
|
|
if not p.is_dir():
|
|
continue
|
|
if not (p / "config.json").exists():
|
|
continue
|
|
entries.append(
|
|
ControlNetCatalogEntry(
|
|
id = p.name,
|
|
display_name = p.name,
|
|
source = "local",
|
|
local_path = str(p),
|
|
control_types = CONTROL_TYPES,
|
|
)
|
|
)
|
|
return entries
|
|
|
|
|
|
def list_controlnets(*, family: Optional[str] = None) -> list[ControlNetCatalogEntry]:
|
|
"""Merged catalog (curated + local), optionally family-filtered. Cheap: one dir scan
|
|
plus the in-memory curated list. Network is only touched on resolve()."""
|
|
merged = list(_CURATED) + _scan_local()
|
|
if family:
|
|
fam = family.strip().lower()
|
|
merged = [e for e in merged if not e.families or fam in {f.lower() for f in e.families}]
|
|
merged.sort(key = lambda e: (e.source != "local", e.display_name.lower()))
|
|
return merged
|
|
|
|
|
|
def _catalog_by_id() -> dict[str, ControlNetCatalogEntry]:
|
|
return {e.id: e for e in (list(_CURATED) + _scan_local())}
|
|
|
|
|
|
def resolve_controlnet(spec_id: str, *, family: Optional[str] = None) -> ResolvedControlNet:
|
|
"""Resolve a ControlNet id to a loadable repo id / local dir.
|
|
|
|
Accepts a catalog/local id, or a bare public HF repo id (``owner/name``). The backend
|
|
loads the result with ``ControlNetModelClass.from_pretrained(path)`` (download + cache
|
|
handled there, like the base pipeline). Raises on an unknown id -> the caller maps to 400.
|
|
|
|
``family`` (the loaded base family) enforces catalog compatibility: a ControlNet is
|
|
architecture-specific, so a catalog entry tagged for another family is rejected here
|
|
with a clear error rather than being loaded through the wrong pipeline class later.
|
|
"""
|
|
entry = _catalog_by_id().get(spec_id)
|
|
if entry is not None:
|
|
# A curated/local entry may declare the families it is built for. A client that
|
|
# bypasses the UI filter (direct API call) could send an entry for another family;
|
|
# reject it before any download so it never reaches the wrong ControlNet pipeline.
|
|
fam = (family or "").strip().lower()
|
|
if entry.families and fam and fam not in {f.lower() for f in entry.families}:
|
|
raise ValueError(
|
|
f"ControlNet '{spec_id}' is for {', '.join(entry.families)}, not the loaded "
|
|
f"'{family}' model; pick a ControlNet built for this family."
|
|
)
|
|
if entry.source == "local":
|
|
path = entry.local_path or ""
|
|
if not path or not Path(path).is_dir():
|
|
raise FileNotFoundError(f"ControlNet '{spec_id}' is no longer present on disk")
|
|
return ResolvedControlNet(spec_id, path, is_local = True)
|
|
if not entry.repo_id:
|
|
raise ValueError(f"ControlNet '{spec_id}' has no repo")
|
|
return ResolvedControlNet(spec_id, entry.repo_id, is_local = False)
|
|
|
|
# A bare public HF repo id (owner/name). STRICT shape -- exactly one slash and
|
|
# alphanumeric-leading segments -- so a filesystem-looking id (/tmp/x, ../x, ~/x,
|
|
# C:\x) can never reach from_pretrained, which would happily treat it as a local
|
|
# directory and bypass the controlnets_dir() no-raw-path contract.
|
|
if re.fullmatch(r"[A-Za-z0-9][A-Za-z0-9_.-]*/[A-Za-z0-9][A-Za-z0-9_.-]*", spec_id):
|
|
return ResolvedControlNet(spec_id, spec_id, is_local = False)
|
|
|
|
raise FileNotFoundError(
|
|
f"unknown ControlNet '{spec_id}': not a local model, catalog entry, or HF repo id"
|
|
)
|
|
|
|
|
|
# Union ControlNet mode indices. A single "union" model covers several control modes and
|
|
# selects the active one via an integer ``control_mode`` argument; these are the standard
|
|
# indices used by the FLUX.1 / Qwen-Image union ControlNets. "passthrough" (an already-made
|
|
# map) carries no intrinsic mode, so it maps to nothing (the caller omits control_mode).
|
|
_UNION_CONTROL_MODES: dict[str, int] = {
|
|
"canny": 0,
|
|
"tile": 1,
|
|
"depth": 2,
|
|
"blur": 3,
|
|
"pose": 4,
|
|
"gray": 5,
|
|
"lq": 6,
|
|
}
|
|
|
|
|
|
def union_control_mode(spec_id: str, control_type: str) -> Optional[int]:
|
|
"""The integer ``control_mode`` for a union ControlNet, or None.
|
|
|
|
Returns a mode only for a curated *union* catalog entry AND a control type that maps to a
|
|
known index; otherwise None so the caller omits the kwarg (a non-union ControlNet has a
|
|
single fixed mode, and 'passthrough' does not name one). Pure lookup, no network."""
|
|
entry = _catalog_by_id().get(spec_id)
|
|
if entry is None or not entry.is_union:
|
|
return None
|
|
return _UNION_CONTROL_MODES.get((control_type or "").strip().lower())
|
|
|
|
|
|
def preprocess_control(image: Any, control_type: str) -> Any:
|
|
"""Turn a source image into a control map.
|
|
|
|
``passthrough`` returns the image unchanged (it is already a depth/pose/edge map made
|
|
elsewhere). ``canny`` derives a dependency-free gradient edge map (a rough stand-in for a
|
|
true Canny; a cv2/kornia detector and depth/pose detectors are a follow-up). Unknown types
|
|
pass through so a new type never hard-fails generation.
|
|
"""
|
|
ct = (control_type or "passthrough").strip().lower()
|
|
if ct != "canny":
|
|
return image
|
|
import numpy as np
|
|
from PIL import Image
|
|
|
|
gray = np.asarray(image.convert("L"), dtype = np.float32)
|
|
gy, gx = np.gradient(gray)
|
|
mag = np.hypot(gx, gy)
|
|
peak = float(mag.max())
|
|
if peak <= 1e-6:
|
|
return image # flat image -> nothing to trace; don't emit a black map
|
|
mag = mag / peak * 255.0
|
|
edges = (mag > 40.0).astype(np.uint8) * 255 # white edges on black, the ControlNet convention
|
|
return Image.fromarray(edges).convert("RGB")
|
|
|
|
|
|
def supports_controlnet(
|
|
*,
|
|
engine: str,
|
|
family: Optional[str],
|
|
has_controlnet_pipeline: bool,
|
|
model_kind: Optional[str],
|
|
transformer_quant: Optional[str],
|
|
) -> bool:
|
|
"""Whether the loaded model can apply a ControlNet.
|
|
|
|
diffusers only for now (native sd.cpp is a follow-up). Requires the family to declare a
|
|
ControlNet pipeline. Blocked for the diffusers GGUF path and torchao fp8/int8 dense
|
|
(same constraints as LoRA): those transformers cannot host the extra conditioning cleanly.
|
|
"""
|
|
if not family or not has_controlnet_pipeline:
|
|
return False
|
|
if engine != "diffusers":
|
|
return False
|
|
if model_kind == "gguf":
|
|
return False
|
|
if transformer_quant and str(transformer_quant).strip().lower() in _DIFFUSERS_BLOCKED_QUANT:
|
|
return False
|
|
return True
|