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goblin/scripts/make-icns.py
2ro 1fdbd80282 icons: regenerate every platform icon from the canonical Goblin sources
All app icons now derive from two sources, end to end:
  img/goblin-icon.png        gradient app icon (yellow gradient + black mascot)
  img/goblin-mark-black.svg  black mascot mark (vector) — Android adaptive fg

- scripts/gen_icons.sh rewritten: one run regenerates the desktop/egui window
  icon (img/icon.png), the Linux AppImage AppDir icon, all Android launcher +
  adaptive-foreground mipmaps, the WiX installer icon, and the macOS .icns.
  Dropped the dead goblin-mask*.png pipeline (the adaptive foreground is now the
  SVG mark composited by the OS over #FFD60A), so the script no longer references
  files that were removed.
- scripts/make-icns.py: new, dependency-free multi-resolution .icns builder
  (iconutil/png2icns aren't always present; ImageMagick alone emits one size).
- wix/Product.ico REPLACED with the Goblin logo (was a stale icon).
- Regenerated macOS AppIcon.icns, Linux goblin.png, all Android mipmaps,
  img/icon.png. Tracked the goblin-mark-{black,white}.svg sources.
2026-06-17 02:36:50 -04:00

61 lines
1.8 KiB
Python
Executable File

#!/usr/bin/env python3
"""Build a macOS .icns from a square PNG, dependency-free.
macOS has `iconutil` and Linux distros have `png2icns`, but neither is reliably
present, and ImageMagick's own .icns writer only emits a single size. So we
assemble the multi-resolution PNG-payload .icns container by hand (the format
macOS 10.7+ accepts): the `icns` magic + big-endian length, then one entry per
OSType, each carrying an 8-bit PNG. ImageMagick (`magick`) does the resizing.
Usage: make-icns.py <source.png> <out.icns>
"""
import struct
import subprocess
import sys
# OSType -> pixel size. PNG-payload entries. Sizes above the source are
# Lanczos-upscaled (soft but acceptable for the few large Dock/Finder slots).
SLOTS = [
(b"icp4", 16),
(b"icp5", 32),
(b"icp6", 64),
(b"ic07", 128),
(b"ic08", 256),
(b"ic11", 32), # 16@2x
(b"ic12", 64), # 32@2x
(b"ic13", 256), # 128@2x
(b"ic09", 512), # 512
(b"ic14", 512), # 256@2x
]
def render(src, size):
out = "/tmp/_icns_%d.png" % size
subprocess.run(
["magick", src, "-resize", "%dx%d" % (size, size),
"-filter", "Lanczos", "-depth", "8", "PNG32:%s" % out],
check=True,
)
return open(out, "rb").read()
def main():
if len(sys.argv) != 3:
sys.exit("usage: make-icns.py <source.png> <out.icns>")
src, out = sys.argv[1], sys.argv[2]
cache, entries = {}, []
for ostype, size in SLOTS:
if size not in cache:
cache[size] = render(src, size)
data = cache[size]
entries.append(ostype + struct.pack(">I", 8 + len(data)) + data)
body = b"".join(entries)
with open(out, "wb") as f:
f.write(b"icns" + struct.pack(">I", 8 + len(body)) + body)
print("wrote %s (%d entries)" % (out, len(entries)))
if __name__ == "__main__":
main()