stable-diffusion-webui/frontend/image_metadata.py
2023-06-23 02:58:24 +00:00

78 lines
2.8 KiB
Python

# This file is part of sygil-webui (https://github.com/Sygil-Dev/sygil-webui/).
# Copyright 2022 Sygil-Dev team.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
""" Class to store image generation parameters to be stored as metadata in the image"""
from __future__ import annotations
from dataclasses import dataclass, asdict
from typing import Dict, Optional
from PIL import Image
from PIL.PngImagePlugin import PngInfo
import copy
@dataclass
class ImageMetadata:
prompt: str = None
seed: str = None
width: str = None
height: str = None
steps: str = None
cfg_scale: str = None
normalize_prompt_weights: str = None
denoising_strength: str = None
GFPGAN: str = None
def as_png_info(self) -> PngInfo:
info = PngInfo()
for key, value in self.as_dict().items():
info.add_text(key, value)
return info
def as_dict(self) -> Dict[str, str]:
return {
f"SD:{key}": str(value)
for key, value in asdict(self).items()
if value is not None
}
@classmethod
def set_on_image(cls, image: Image, metadata: ImageMetadata) -> None:
"""Sets metadata on image, in both text form and as an ImageMetadata object"""
if metadata:
image.info = metadata.as_dict()
else:
metadata = ImageMetadata()
image.info["ImageMetadata"] = copy.copy(metadata)
@classmethod
def get_from_image(cls, image: Image) -> Optional[ImageMetadata]:
"""Gets metadata from an image, first looking for an ImageMetadata,
then if not found tries to construct one from the info"""
metadata = image.info.get("ImageMetadata", None)
if not metadata:
found_metadata = False
metadata = ImageMetadata()
for key, value in image.info.items():
if key.lower().startswith("sd:"):
key = key[3:]
if f"{key}" in metadata.__dict__:
metadata.__dict__[key] = value
found_metadata = True
if not found_metadata:
metadata = None
if not metadata:
print("Couldn't find metadata on image")
return metadata