mirror of
https://github.com/invoke-ai/InvokeAI
synced 2024-08-30 20:32:17 +00:00
96 lines
3.6 KiB
Python
96 lines
3.6 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. Intended to be subclassable in order to
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create more complex naming schemes, including using the
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prompt for file/directory names.
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PromptFormatter -- Utility for converting a Namespace of prompt parameters
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back into a formatted prompt string with command-line switches.
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"""
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import os
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import re
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from math import sqrt, floor, ceil
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from PIL import Image, PngImagePlugin
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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, prompt, name):
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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', prompt)
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image.save(path, 'PNG', pnginfo=info)
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return path
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# TODO move this to its own helper function; it's not really a method of pngwriter
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def make_grid(self, image_list, rows=None, cols=None):
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image_cnt = len(image_list)
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if None in (rows, cols):
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rows = floor(sqrt(image_cnt)) # try to make it square
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cols = ceil(image_cnt / rows)
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width = image_list[0].width
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height = image_list[0].height
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grid_img = Image.new('RGB', (width * cols, height * rows))
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i = 0
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for r in range(0, rows):
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for c in range(0, cols):
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if i>=len(image_list):
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break
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grid_img.paste(image_list[i], (c * width, r * height))
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i = i + 1
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return grid_img
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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.init_img:
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switches.append(f'-I{opt.init_img}')
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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 t2i.full_precision:
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switches.append('-F')
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return ' '.join(switches)
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