catarrh
b4ebd37cc3
- generate-icons.py: preserve SVG aspect ratio (was stretched 1.49x), art at 80% for maskable safe zone, emit transparent cross-gold.png - manifest icons: purpose 'any maskable' - applyTheme(): compose favicon per app theme (chrome bg + gold cross)
72 lines
2.1 KiB
Python
72 lines
2.1 KiB
Python
#!/usr/bin/env python3
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"""Generate PWA icons from OrthodoxCross.svg using rsvg-convert + Pillow."""
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import os
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import subprocess
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import tempfile
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from PIL import Image
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SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
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PROJECT_DIR = os.path.join(SCRIPT_DIR, '..')
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SVG_PATH = os.path.join(PROJECT_DIR, 'static', 'OrthodoxCross.svg')
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ICONS_DIR = os.path.join(PROJECT_DIR, 'static', 'icons')
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os.makedirs(ICONS_DIR, exist_ok=True)
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GOLD = (0xC5, 0xA5, 0x5A)
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NAVY = (0x1A, 0x1A, 0x2E)
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RENDER_SIZE = 2048
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ART_SCALE = 0.8 # art occupies this fraction of the canvas (maskable safe zone)
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def render_svg():
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with tempfile.NamedTemporaryFile(suffix='.png', delete=False) as tmp:
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tmp_path = tmp.name
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try:
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subprocess.run([
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'rsvg-convert',
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'-h', str(RENDER_SIZE),
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'--keep-aspect-ratio',
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SVG_PATH,
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'-o', tmp_path,
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], check=True)
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return Image.open(tmp_path).convert('RGBA')
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finally:
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os.unlink(tmp_path)
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def gold_silhouette():
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img = render_svg()
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gold = Image.new('RGBA', img.size, GOLD + (255,))
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gold.putalpha(img.split()[3])
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return gold
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def gold_art(long_side):
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img = gold_silhouette()
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scale = long_side / max(img.size)
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return img.resize((round(img.width * scale), round(img.height * scale)), Image.LANCZOS)
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def compose_app_icon(size):
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canvas = Image.new('RGBA', (size, size), NAVY + (255,))
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art = gold_art(round(size * ART_SCALE))
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canvas.alpha_composite(art, ((size - art.width) // 2, (size - art.height) // 2))
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return canvas
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def compose_transparent_art(size):
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canvas = Image.new('RGBA', (size, size), (0, 0, 0, 0))
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art = gold_art(size)
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canvas.alpha_composite(art, ((size - art.width) // 2, (size - art.height) // 2))
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return canvas
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for size in [192, 512]:
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out = os.path.join(ICONS_DIR, f'icon-{size}.png')
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compose_app_icon(size).save(out, 'PNG')
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print(f'Saved {out} ({size}x{size})')
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transparent_out = os.path.join(ICONS_DIR, 'cross-gold.png')
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compose_transparent_art(512).save(transparent_out, 'PNG')
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print(f'Saved {transparent_out} (512x512)')
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