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import hashlib
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import json
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import logging
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import os.path
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import random
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from datetime import datetime, timezone
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from functools import lru_cache
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import requests
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from PIL import Image, ImageOps
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from urllib3.exceptions import LocationParseError
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from urllib3.util import parse_url
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from imaginairy.model_manager import DEFAULT_MODEL
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from imaginairy.utils import get_device, get_hardware_description
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logger = logging.getLogger(__name__)
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class InvalidUrlError(ValueError):
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pass
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class LazyLoadingImage:
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def __init__(self, *, filepath=None, url=None):
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if not filepath and not url:
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raise ValueError("You must specify a url or filepath")
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if filepath and url:
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raise ValueError("You cannot specify a url and filepath")
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# validate file exists
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if filepath and not os.path.exists(filepath):
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raise FileNotFoundError(f"File does not exist: {filepath}")
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# validate url is valid url
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if url:
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try:
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parsed_url = parse_url(url)
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except LocationParseError:
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raise InvalidUrlError(f"Invalid url: {url}") # noqa
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if parsed_url.scheme not in {"http", "https"} or not parsed_url.host:
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raise InvalidUrlError(f"Invalid url: {url}")
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self._lazy_filepath = filepath
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self._lazy_url = url
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self._img = None
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def __getattr__(self, key):
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if key == "_img":
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# http://nedbatchelder.com/blog/201010/surprising_getattr_recursion.html
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raise AttributeError()
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if self._img:
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return getattr(self._img, key)
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if self._lazy_filepath:
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self._img = Image.open(self._lazy_filepath)
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logger.info(
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f"Loaded input 🖼 of size {self._img.size} from {self._lazy_filepath}"
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)
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elif self._lazy_url:
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self._img = Image.open(
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requests.get(self._lazy_url, stream=True, timeout=60).raw
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)
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logger.info(
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f"Loaded input 🖼 of size {self._img.size} from {self._lazy_url}"
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)
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# fix orientation
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self._img = ImageOps.exif_transpose(self._img)
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return getattr(self._img, key)
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def __str__(self):
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return self._lazy_filepath or self._lazy_url
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class WeightedPrompt:
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def __init__(self, text, weight=1):
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self.text = text
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self.weight = weight
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def __str__(self):
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return f"{self.weight}*({self.text})"
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class ImaginePrompt:
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class MaskMode:
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KEEP = "keep"
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REPLACE = "replace"
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DEFAULT_FACE_FIDELITY = 0.2
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def __init__(
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self,
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prompt=None,
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prompt_strength=7.5,
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init_image=None, # Pillow Image, LazyLoadingImage, or filepath str
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init_image_strength=0.3,
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mask_prompt=None,
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mask_image=None,
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mask_mode=MaskMode.REPLACE,
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mask_modify_original=True,
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seed=None,
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steps=50,
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height=512,
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width=512,
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upscale=False,
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fix_faces=False,
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fix_faces_fidelity=DEFAULT_FACE_FIDELITY,
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sampler_type="plms",
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conditioning=None,
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tile_mode=False,
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model=DEFAULT_MODEL,
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):
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prompt = prompt if prompt is not None else ""
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fix_faces_fidelity = (
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fix_faces_fidelity if fix_faces_fidelity else self.DEFAULT_FACE_FIDELITY
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)
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if isinstance(prompt, str):
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self.prompts = [WeightedPrompt(prompt, 1)]
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else:
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self.prompts = prompt
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self.prompts.sort(key=lambda p: p.weight, reverse=True)
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self.prompt_strength = prompt_strength
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if isinstance(init_image, str):
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init_image = LazyLoadingImage(filepath=init_image)
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if isinstance(mask_image, str):
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mask_image = LazyLoadingImage(filepath=mask_image)
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if mask_image is not None and mask_prompt is not None:
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raise ValueError("You can only set one of `mask_image` and `mask_prompt`")
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if model is None:
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model = DEFAULT_MODEL
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self.init_image = init_image
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self.init_image_strength = init_image_strength
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self.seed = random.randint(1, 1_000_000_000) if seed is None else seed
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self.steps = steps
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self.height = height
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self.width = width
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self.upscale = upscale
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self.fix_faces = fix_faces
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self.fix_faces_fidelity = fix_faces_fidelity
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self.sampler_type = sampler_type
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self.conditioning = conditioning
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self.mask_prompt = mask_prompt
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self.mask_image = mask_image
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self.mask_mode = mask_mode
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self.mask_modify_original = mask_modify_original
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self.tile_mode = tile_mode
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self.model = model
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@property
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def prompt_text(self):
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if len(self.prompts) == 1:
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return self.prompts[0].text
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return "|".join(str(p) for p in self.prompts)
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def prompt_description(self):
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return (
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f'"{self.prompt_text}" {self.width}x{self.height}px '
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f"seed:{self.seed} prompt-strength:{self.prompt_strength} steps:{self.steps} sampler-type:{self.sampler_type}"
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)
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def as_dict(self):
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prompts = [(p.weight, p.text) for p in self.prompts]
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return {
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"software": "imaginairy",
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"prompts": prompts,
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"prompt_strength": self.prompt_strength,
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"init_image": str(self.init_image),
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"init_image_strength": self.init_image_strength,
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"seed": self.seed,
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"steps": self.steps,
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"height": self.height,
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"width": self.width,
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"upscale": self.upscale,
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"fix_faces": self.fix_faces,
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"sampler_type": self.sampler_type,
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}
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class ExifCodes:
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"""https://www.awaresystems.be/imaging/tiff/tifftags/baseline.html"""
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ImageDescription = 0x010E
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Software = 0x0131
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DateTime = 0x0132
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HostComputer = 0x013C
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UserComment = 0x9286
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class ImagineResult:
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def __init__(
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self,
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img,
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prompt: ImaginePrompt,
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is_nsfw,
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safety_score,
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upscaled_img=None,
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modified_original=None,
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mask_binary=None,
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mask_grayscale=None,
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timings=None,
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):
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self.prompt = prompt
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self.images = {"generated": img}
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if upscaled_img:
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self.images["upscaled"] = upscaled_img
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if modified_original:
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self.images["modified_original"] = modified_original
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if mask_binary:
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self.images["mask_binary"] = mask_binary
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if mask_grayscale:
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self.images["mask_grayscale"] = mask_grayscale
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self.timings = timings
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# for backward compat
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self.img = img
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self.upscaled_img = upscaled_img
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self.is_nsfw = is_nsfw
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self.safety_score = safety_score
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self.created_at = datetime.utcnow().replace(tzinfo=timezone.utc)
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self.torch_backend = get_device()
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self.hardware_name = get_hardware_description(get_device())
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def md5(self):
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return hashlib.md5(self.img.tobytes()).hexdigest()
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def metadata_dict(self):
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return {
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"prompt": self.prompt.as_dict(),
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}
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def timings_str(self):
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if not self.timings:
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return ""
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return " ".join(f"{k}:{v:.2f}s" for k, v in self.timings.items())
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def _exif(self):
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exif = Image.Exif()
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exif[ExifCodes.ImageDescription] = self.prompt.prompt_description()
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exif[ExifCodes.UserComment] = json.dumps(self.metadata_dict())
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# help future web scrapes not ingest AI generated art
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exif[ExifCodes.Software] = "Imaginairy / Stable Diffusion v1.4"
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exif[ExifCodes.DateTime] = self.created_at.isoformat(sep=" ")[:19]
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exif[ExifCodes.HostComputer] = f"{self.torch_backend}:{self.hardware_name}"
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return exif
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def save(self, save_path, image_type="generated"):
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img = self.images.get(image_type, None)
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if img is None:
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raise ValueError(
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f"Image of type {image_type} not stored. Options are: {self.images.keys()}"
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)
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img.convert("RGB").save(save_path, exif=self._exif())
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@lru_cache(maxsize=2)
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def _get_briefly_cached_url(url):
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return requests.get(url, timeout=60)
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