ml
50 lines
1.9 KiB
Python
50 lines
1.9 KiB
Python
#!/usr/bin/env python3
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"""Downsizes res/app_icon_50x50_64_color.png into watch/resources/app_icon.png.
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Pebble's own build tooling (process_sdk_resources.py) hard-fails any
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"menuIcon": true resource larger than 25x25px - the fixed size Pebble OS
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renders app icons at in the watch's own app launcher list (and, synced
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from the watch, in the mobile app's installed-apps list too). The source
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art in res/ is 50x50 (square, so it downsamples to exactly 25x25 with no
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letterboxing) - the color variant is used, per the same "prefer color"
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choice as the rest of this app's card art, over the companion
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*_gray.png fallback also present in res/.
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Generated output, like i18n_tables.auto.c and resources/img/*.png - not
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committed (see .gitignore), regenerate by running this script directly
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or via `pebble build` (wired into wscript alongside gen_card_images.py).
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Requires Pillow (`pip install Pillow`), not part of this repo's own
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desktop build/test toolchain.
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"""
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import os
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import sys
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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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SRC_PATH = os.path.normpath(
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os.path.join(SCRIPT_DIR, "..", "..", "res", "app_icon_50x50_64_color.png")
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)
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OUT_PATH = os.path.normpath(os.path.join(SCRIPT_DIR, "..", "resources", "app_icon.png"))
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MAX_ICON_SIZE = 25 # Pebble's own hard cap for "menuIcon": true resources.
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def main():
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if os.path.exists(OUT_PATH) and os.path.getmtime(OUT_PATH) >= os.path.getmtime(SRC_PATH):
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print(f"{OUT_PATH} already up to date", file=sys.stderr)
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return
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os.makedirs(os.path.dirname(OUT_PATH), exist_ok=True)
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with Image.open(SRC_PATH) as img:
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ratio = MAX_ICON_SIZE / max(img.width, img.height)
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size = (round(img.width * ratio), round(img.height * ratio))
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resized = img.convert("RGBA").resize(size, Image.LANCZOS)
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resized.save(OUT_PATH, "PNG", optimize=True)
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print(f"wrote {OUT_PATH} ({size[0]}x{size[1]})", file=sys.stderr)
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if __name__ == "__main__":
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main()
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