mirror of
https://github.com/invoke-ai/InvokeAI
synced 2024-08-30 20:32:17 +00:00
129 lines
4.8 KiB
Python
129 lines
4.8 KiB
Python
"""
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Two helper classes for dealing with PNG images and their path names.
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PngWriter -- Converts Images generated by T2I into PNGs, finds
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appropriate names for them, and writes prompt metadata
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into the PNG.
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Exports function retrieve_metadata(path)
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"""
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import os
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import re
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import json
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from pathlib import Path
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from filelock import FileLock
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from PIL import PngImagePlugin, Image
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# -------------------image generation utils-----
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class PngWriter:
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def __init__(self, outdir):
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self.outdir = outdir
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os.makedirs(outdir, exist_ok=True)
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def unique_prefix(self)->str:
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next_prefix_file = Path(self.outdir,'.next_prefix')
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next_prefix_lock = Path(self.outdir,'.next_prefix.lock')
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prefix = 0
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with FileLock(next_prefix_lock):
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if not next_prefix_file.exists():
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prefix = self._unused_prefix()
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else:
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with open(next_prefix_file,'r') as file:
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prefix=int(file.readline() or int(self._unused_prefix())-1)
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prefix+=1
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with open(next_prefix_file,'w') as file:
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file.write(str(prefix))
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return f'{prefix:06}'
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# gives the next unique prefix in outdir
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def _unused_prefix(self):
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# sort reverse alphabetically until we find max+1
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dirlist = sorted(os.listdir(self.outdir), reverse=True)
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# find the first filename that matches our pattern or return 000000.0.png
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existing_name = next(
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(f for f in dirlist if re.match('^(\d+)\..*\.png', f)),
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'0000000.0.png',
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)
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basecount = int(existing_name.split('.', 1)[0]) + 1
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return f'{basecount:06}'
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# saves image named _image_ to outdir/name, writing metadata from prompt
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# returns full path of output
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def save_image_and_prompt_to_png(self, image, dream_prompt, name, metadata=None, compress_level=6):
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path = os.path.join(self.outdir, name)
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info = PngImagePlugin.PngInfo()
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info.add_text('Dream', dream_prompt)
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if metadata:
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info.add_text('sd-metadata', json.dumps(metadata))
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image.save(path, 'PNG', pnginfo=info, compress_level=compress_level)
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return path
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def retrieve_metadata(self,img_basename):
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'''
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Given a PNG filename stored in outdir, returns the "sd-metadata"
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metadata stored there, as a dict
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'''
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path = os.path.join(self.outdir,img_basename)
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all_metadata = retrieve_metadata(path)
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return all_metadata['sd-metadata']
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def retrieve_metadata(img_path):
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'''
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Given a path to a PNG image, returns the "sd-metadata"
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metadata stored there, as a dict
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'''
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im = Image.open(img_path)
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if hasattr(im, 'text'):
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md = im.text.get('sd-metadata', '{}')
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dream_prompt = im.text.get('Dream', '')
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else:
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# When trying to retrieve metadata from images without a 'text' payload, such as JPG images.
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md = '{}'
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dream_prompt = ''
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return {'sd-metadata': json.loads(md), 'Dream': dream_prompt}
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def write_metadata(img_path:str, meta:dict):
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im = Image.open(img_path)
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info = PngImagePlugin.PngInfo()
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info.add_text('sd-metadata', json.dumps(meta))
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im.save(img_path,'PNG',pnginfo=info)
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class PromptFormatter:
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def __init__(self, t2i, opt):
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self.t2i = t2i
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self.opt = opt
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# note: the t2i object should provide all these values.
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# there should be no need to or against opt values
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def normalize_prompt(self):
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"""Normalize the prompt and switches"""
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t2i = self.t2i
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opt = self.opt
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switches = list()
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switches.append(f'"{opt.prompt}"')
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switches.append(f'-s{opt.steps or t2i.steps}')
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switches.append(f'-W{opt.width or t2i.width}')
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switches.append(f'-H{opt.height or t2i.height}')
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switches.append(f'-C{opt.cfg_scale or t2i.cfg_scale}')
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switches.append(f'-A{opt.sampler_name or t2i.sampler_name}')
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if opt.seamless or t2i.seamless:
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switches.append('--seamless')
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if opt.init_img:
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switches.append(f'-I{opt.init_img}')
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if opt.fit:
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switches.append('--fit')
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if opt.strength and opt.init_img is not None:
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switches.append(f'-f{opt.strength or t2i.strength}')
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if opt.gfpgan_strength:
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switches.append(f'-G{opt.gfpgan_strength}')
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if opt.upscale:
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switches.append(f'-U {" ".join([str(u) for u in opt.upscale])}')
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if opt.variation_amount > 0:
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switches.append(f'-v{opt.variation_amount}')
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if opt.with_variations:
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formatted_variations = ','.join(f'{seed}:{weight}' for seed, weight in opt.with_variations)
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switches.append(f'-V{formatted_variations}')
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return ' '.join(switches)
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