mirror of
https://github.com/invoke-ai/InvokeAI
synced 2024-08-30 20:32:17 +00:00
2b1aaf4ee7
- scripts and documentation updated to match - ran preflight checks on both web and CLI and seems to be working
69 lines
2.3 KiB
Python
69 lines
2.3 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 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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# gives the next unique prefix in outdir
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def unique_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):
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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)
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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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md = im.text.get('sd-metadata', '{}')
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dream_prompt = im.text.get('Dream', '')
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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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