35 lines
1.4 KiB
Python
35 lines
1.4 KiB
Python
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# -*- coding: utf-8 -*-
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from PIL import Image, ImageDraw
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import os
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OUT = os.path.join(os.path.dirname(os.path.abspath(__file__)), '..', 'app', 'public', 'icons')
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os.makedirs(OUT, exist_ok=True)
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BRAND = (48, 86, 211)
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BRAND_DARK = (35, 62, 160)
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def make(size, safe=1.0):
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ss = size * 4
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img = Image.new('RGBA', (ss, ss), (0, 0, 0, 0))
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grad = Image.new('RGBA', (ss, ss), (0, 0, 0, 0))
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gd = ImageDraw.Draw(grad)
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for y in range(ss):
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t = y / ss
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c = tuple(int(BRAND[i] + (BRAND_DARK[i] - BRAND[i]) * t) for i in range(3)) + (255,)
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gd.line([(0, y), (ss, y)], fill=c)
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mask = Image.new('L', (ss, ss), 0)
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ImageDraw.Draw(mask).rounded_rectangle([0, 0, ss - 1, ss - 1], radius=ss // 5, fill=255)
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img.paste(grad, (0, 0), mask)
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d = ImageDraw.Draw(img)
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white = (255, 255, 255, 240)
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# safe 缩放：maskable 时内容收缩到中心 70% 区域
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cx, cy, k = ss / 2, ss / 2, safe
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d.ellipse([cx - 0.18*ss*k, cy - 0.34*ss*k, cx + 0.18*ss*k, cy + 0.10*ss*k], fill=white)
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d.ellipse([cx + 0.03*ss*k, cy + 0.08*ss*k, cx + 0.33*ss*k, cy + 0.34*ss*k], fill=(255, 255, 255, 200))
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return img.resize((size, size), Image.LANCZOS)
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make(192).save(os.path.join(OUT, 'pwa-192.png'))
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make(512).save(os.path.join(OUT, 'pwa-512.png'))
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make(512, safe=0.7).save(os.path.join(OUT, 'maskable-512.png'))
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print('pwa icons:', os.listdir(OUT))
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