220 lines
8.3 KiB
Python
220 lines
8.3 KiB
Python
import base64
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import json
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import numpy as np
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import zlib
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from PIL import Image, PngImagePlugin, ImageDraw, ImageFont
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from fonts.ttf import Roboto
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import torch
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class EmbeddingEncoder(json.JSONEncoder):
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def default(self, obj):
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if isinstance(obj, torch.Tensor):
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return {'TORCHTENSOR': obj.cpu().detach().numpy().tolist()}
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return json.JSONEncoder.default(self, obj)
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class EmbeddingDecoder(json.JSONDecoder):
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def __init__(self, *args, **kwargs):
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json.JSONDecoder.__init__(self, object_hook=self.object_hook, *args, **kwargs)
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def object_hook(self, d):
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if 'TORCHTENSOR' in d:
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return torch.from_numpy(np.array(d['TORCHTENSOR']))
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return d
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def embedding_to_b64(data):
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d = json.dumps(data, cls=EmbeddingEncoder)
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return base64.b64encode(d.encode())
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def embedding_from_b64(data):
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d = base64.b64decode(data)
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return json.loads(d, cls=EmbeddingDecoder)
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def lcg(m=2**32, a=1664525, c=1013904223, seed=0):
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while True:
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seed = (a * seed + c) % m
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yield seed % 255
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def xor_block(block):
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g = lcg()
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randblock = np.array([next(g) for _ in range(np.product(block.shape))]).astype(np.uint8).reshape(block.shape)
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return np.bitwise_xor(block.astype(np.uint8), randblock & 0x0F)
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def style_block(block, sequence):
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im = Image.new('RGB', (block.shape[1], block.shape[0]))
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draw = ImageDraw.Draw(im)
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i = 0
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for x in range(-6, im.size[0], 8):
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for yi, y in enumerate(range(-6, im.size[1], 8)):
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offset = 0
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if yi % 2 == 0:
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offset = 4
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shade = sequence[i % len(sequence)]
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i += 1
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draw.ellipse((x+offset, y, x+6+offset, y+6), fill=(shade, shade, shade))
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fg = np.array(im).astype(np.uint8) & 0xF0
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return block ^ fg
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def insert_image_data_embed(image, data):
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d = 3
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data_compressed = zlib.compress(json.dumps(data, cls=EmbeddingEncoder).encode(), level=9)
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data_np_ = np.frombuffer(data_compressed, np.uint8).copy()
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data_np_high = data_np_ >> 4
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data_np_low = data_np_ & 0x0F
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h = image.size[1]
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next_size = data_np_low.shape[0] + (h-(data_np_low.shape[0] % h))
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next_size = next_size + ((h*d)-(next_size % (h*d)))
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data_np_low.resize(next_size)
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data_np_low = data_np_low.reshape((h, -1, d))
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data_np_high.resize(next_size)
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data_np_high = data_np_high.reshape((h, -1, d))
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edge_style = list(data['string_to_param'].values())[0].cpu().detach().numpy().tolist()[0][:1024]
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edge_style = (np.abs(edge_style)/np.max(np.abs(edge_style))*255).astype(np.uint8)
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data_np_low = style_block(data_np_low, sequence=edge_style)
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data_np_low = xor_block(data_np_low)
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data_np_high = style_block(data_np_high, sequence=edge_style[::-1])
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data_np_high = xor_block(data_np_high)
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im_low = Image.fromarray(data_np_low, mode='RGB')
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im_high = Image.fromarray(data_np_high, mode='RGB')
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background = Image.new('RGB', (image.size[0]+im_low.size[0]+im_high.size[0]+2, image.size[1]), (0, 0, 0))
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background.paste(im_low, (0, 0))
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background.paste(image, (im_low.size[0]+1, 0))
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background.paste(im_high, (im_low.size[0]+1+image.size[0]+1, 0))
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return background
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def crop_black(img, tol=0):
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mask = (img > tol).all(2)
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mask0, mask1 = mask.any(0), mask.any(1)
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col_start, col_end = mask0.argmax(), mask.shape[1]-mask0[::-1].argmax()
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row_start, row_end = mask1.argmax(), mask.shape[0]-mask1[::-1].argmax()
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return img[row_start:row_end, col_start:col_end]
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def extract_image_data_embed(image):
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d = 3
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outarr = crop_black(np.array(image.convert('RGB').getdata()).reshape(image.size[1], image.size[0], d).astype(np.uint8)) & 0x0F
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black_cols = np.where(np.sum(outarr, axis=(0, 2)) == 0)
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if black_cols[0].shape[0] < 2:
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print('No Image data blocks found.')
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return None
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data_block_lower = outarr[:, :black_cols[0].min(), :].astype(np.uint8)
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data_block_upper = outarr[:, black_cols[0].max()+1:, :].astype(np.uint8)
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data_block_lower = xor_block(data_block_lower)
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data_block_upper = xor_block(data_block_upper)
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data_block = (data_block_upper << 4) | (data_block_lower)
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data_block = data_block.flatten().tobytes()
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data = zlib.decompress(data_block)
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return json.loads(data, cls=EmbeddingDecoder)
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def caption_image_overlay(srcimage, title, footerLeft, footerMid, footerRight, textfont=None):
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from math import cos
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image = srcimage.copy()
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if textfont is None:
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try:
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textfont = ImageFont.truetype(opts.font or Roboto, fontsize)
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textfont = opts.font or Roboto
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except Exception:
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textfont = Roboto
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factor = 1.5
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gradient = Image.new('RGBA', (1, image.size[1]), color=(0, 0, 0, 0))
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for y in range(image.size[1]):
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mag = 1-cos(y/image.size[1]*factor)
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mag = max(mag, 1-cos((image.size[1]-y)/image.size[1]*factor*1.1))
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gradient.putpixel((0, y), (0, 0, 0, int(mag*255)))
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image = Image.alpha_composite(image.convert('RGBA'), gradient.resize(image.size))
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draw = ImageDraw.Draw(image)
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fontsize = 32
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font = ImageFont.truetype(textfont, fontsize)
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padding = 10
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_, _, w, h = draw.textbbox((0, 0), title, font=font)
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fontsize = min(int(fontsize * (((image.size[0]*0.75)-(padding*4))/w)), 72)
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font = ImageFont.truetype(textfont, fontsize)
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_, _, w, h = draw.textbbox((0, 0), title, font=font)
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draw.text((padding, padding), title, anchor='lt', font=font, fill=(255, 255, 255, 230))
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_, _, w, h = draw.textbbox((0, 0), footerLeft, font=font)
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fontsize_left = min(int(fontsize * (((image.size[0]/3)-(padding))/w)), 72)
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_, _, w, h = draw.textbbox((0, 0), footerMid, font=font)
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fontsize_mid = min(int(fontsize * (((image.size[0]/3)-(padding))/w)), 72)
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_, _, w, h = draw.textbbox((0, 0), footerRight, font=font)
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fontsize_right = min(int(fontsize * (((image.size[0]/3)-(padding))/w)), 72)
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font = ImageFont.truetype(textfont, min(fontsize_left, fontsize_mid, fontsize_right))
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draw.text((padding, image.size[1]-padding), footerLeft, anchor='ls', font=font, fill=(255, 255, 255, 230))
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draw.text((image.size[0]/2, image.size[1]-padding), footerMid, anchor='ms', font=font, fill=(255, 255, 255, 230))
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draw.text((image.size[0]-padding, image.size[1]-padding), footerRight, anchor='rs', font=font, fill=(255, 255, 255, 230))
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return image
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if __name__ == '__main__':
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testEmbed = Image.open('test_embedding.png')
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data = extract_image_data_embed(testEmbed)
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assert data is not None
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data = embedding_from_b64(testEmbed.text['sd-ti-embedding'])
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assert data is not None
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image = Image.new('RGBA', (512, 512), (255, 255, 200, 255))
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cap_image = caption_image_overlay(image, 'title', 'footerLeft', 'footerMid', 'footerRight')
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test_embed = {'string_to_param': {'*': torch.from_numpy(np.random.random((2, 4096)))}}
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embedded_image = insert_image_data_embed(cap_image, test_embed)
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retrived_embed = extract_image_data_embed(embedded_image)
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assert str(retrived_embed) == str(test_embed)
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embedded_image2 = insert_image_data_embed(cap_image, retrived_embed)
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assert embedded_image == embedded_image2
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g = lcg()
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shared_random = np.array([next(g) for _ in range(100)]).astype(np.uint8).tolist()
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reference_random = [253, 242, 127, 44, 157, 27, 239, 133, 38, 79, 167, 4, 177,
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95, 130, 79, 78, 14, 52, 215, 220, 194, 126, 28, 240, 179,
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160, 153, 149, 50, 105, 14, 21, 218, 199, 18, 54, 198, 193,
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38, 128, 19, 53, 195, 124, 75, 205, 12, 6, 145, 0, 28,
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30, 148, 8, 45, 218, 171, 55, 249, 97, 166, 12, 35, 0,
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41, 221, 122, 215, 170, 31, 113, 186, 97, 119, 31, 23, 185,
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66, 140, 30, 41, 37, 63, 137, 109, 216, 55, 159, 145, 82,
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204, 86, 73, 222, 44, 198, 118, 240, 97]
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assert shared_random == reference_random
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hunna_kay_random_sum = sum(np.array([next(g) for _ in range(100000)]).astype(np.uint8).tolist())
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assert 12731374 == hunna_kay_random_sum
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