66 lines
2.4 KiB
Python
66 lines
2.4 KiB
Python
# -*- coding: utf-8 -*-
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"""
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生成 contact 公共邮箱头像：品牌深底 + 青→红渐变 @ 符号
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视觉规范与官网一致（assets/css/style.css 的 --bg/--cyan/--brand）
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用法: uv run --with pillow python3 tools/gen_contact_avatar.py
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"""
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from PIL import Image, ImageDraw, ImageFilter, ImageFont
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SIZE = 512
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BG = (7, 11, 22) # 官网 --bg-1
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CYAN = (76, 195, 255) # 官网 --cyan
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RED = (255, 61, 90) # 官网 --brand
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OUT = 'assets/brand/contact-avatar.png'
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# ---------- 背景：深底 + 左上青辉光 / 右下红辉光 ----------
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bg = Image.new('RGB', (SIZE, SIZE), BG)
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def glow_blob(box, blur):
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blob = Image.new('L', (SIZE, SIZE), 0)
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ImageDraw.Draw(blob).ellipse(box, fill=80)
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return blob.filter(ImageFilter.GaussianBlur(blur))
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bg.paste(Image.new('RGB', (SIZE, SIZE), CYAN), (0, 0), glow_blob((-220, -220, 240, 240), 100))
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bg.paste(Image.new('RGB', (SIZE, SIZE), RED), (0, 0), glow_blob((SIZE - 240, SIZE - 240, SIZE + 220, SIZE + 220), 100))
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# ---------- 对角渐变图（青 → 红），用作 @ 的填充色 ----------
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c1, c2 = CYAN, RED
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span = 2 * (SIZE - 1)
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grad = Image.new('RGB', (SIZE, SIZE))
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grad.putdata([
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(
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round(c1[0] + (c2[0] - c1[0]) * (x + y) / span),
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round(c1[1] + (c2[1] - c1[1]) * (x + y) / span),
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round(c1[2] + (c2[2] - c1[2]) * (x + y) / span),
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)
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for y in range(SIZE) for x in range(SIZE)
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])
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# ---------- 渲染 @ 文字 mask ----------
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# macOS 西文字体按优先级找，@ 字形各字体差异不大
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FONT_CANDIDATES = [
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'/System/Library/Fonts/SFNS.ttf',
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'/System/Library/Fonts/SFNSText.ttf',
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'/System/Library/Fonts/Helvetica.ttc',
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]
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font_path = next((p for p in FONT_CANDIDATES if __import__('os').path.exists(p)), None)
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if not font_path:
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raise SystemExit('找不到可用系统字体: ' + ', '.join(FONT_CANDIDATES))
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font = ImageFont.truetype(font_path, 400)
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mask = Image.new('L', (SIZE, SIZE), 0)
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ImageDraw.Draw(mask).text((SIZE // 2, SIZE // 2), '@', font=font, fill=255, anchor='mm')
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# 自检：@ 必须真的渲染出来了，否则静默输出空底图
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ink = sum(1 for v in mask.getdata() if v > 0)
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ratio = ink / (SIZE * SIZE)
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if not 0.05 < ratio < 0.45:
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raise SystemExit(f'@ 渲染异常，墨迹占比 {ratio:.1%}（预期 5%~45%），检查字体 {font_path}')
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bg.paste(grad, (0, 0), mask)
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import os
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os.makedirs(os.path.dirname(OUT), exist_ok=True)
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bg.save(OUT, 'PNG', optimize=True)
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print(f'完成: {OUT} {SIZE}x{SIZE} @{ratio:.0%} 字体={font_path}')
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