ThreadCount Community edition

Uniform stock management for healthcare linen rooms. Licensed under the GNU AGPL v3.

scripts/make-staff-icon.py

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+#!/usr/bin/env python3
+"""Generate the ThreadCount Staff launcher icon.
+
+    python3 scripts/make-staff-icon.py
+
+The two apps have to be the same family and still be telling apart on a home screen, where the
+only other clue is a truncated label. So this is the counter app's mark exactly — four stepped
+bars in the 60/48/34/22 proportions from tc-icon.svg — inverted onto ink: the leading bar keeps
+the accent, the rest go from ink to paper, and the ground goes from paper to ink.
+
+Light tile versus dark tile is the strongest difference available at 48px, it costs no new
+artwork, and it stays on-brand: the app's own splash is already ink.
+
+The geometry is measured from the counter app's own PNGs rather than guessed, and expressed as
+fractions of the canvas so every density comes out identical rather than merely similar. Bars are
+drawn at 4x and downsampled, which is what keeps a 43-pixel-wide bar from landing half a pixel
+off at mdpi.
+"""
+import os
+from PIL import Image
+
+ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+RES = os.path.join(ROOT, "android-staff/app/src/main/res")
+
+INK = (32, 30, 29, 255)
+PAPER = (243, 242, 242, 255)
+ACCENT = (236, 48, 19, 255)
+
+# Measured from android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_foreground.png (432px):
+# bars start at x=129, widths 174/139/98/64, first at y=147, pitch 40, height 23.
+FG = {
+    "x0": 129 / 432,
+    "widths": [174 / 432, 139 / 432, 98 / 432, 64 / 432],
+    "y0": 147 / 432,
+    "pitch": 40 / 432,
+    "height": 23 / 432,
+}
+# Measured from .../mipmap-xxxhdpi/ic_launcher.png (192px): the legacy tile crops tighter, so the
+# mark sits larger in frame than it does inside the adaptive icon's safe zone.
+LEGACY = {
+    "x0": 38 / 192,
+    "widths": [116 / 192, 93 / 192, 66 / 192, 43 / 192],
+    "y0": 47 / 192,
+    "pitch": 27 / 192,
+    "height": 21 / 192,
+}
+
+SS = 4  # supersample factor
+
+
+def draw(size, geom, background):
+    """The mark at `size` px. `background` None gives a transparent adaptive foreground."""
+    n = size * SS
+    im = Image.new("RGBA", (n, n), background or (0, 0, 0, 0))
+    px = Image.new("RGBA", (1, 1))  # placeholder so the linter sees px used below
+    del px
+    for i, wfrac in enumerate(geom["widths"]):
+        x0 = round(geom["x0"] * n)
+        y0 = round((geom["y0"] + i * geom["pitch"]) * n)
+        w = round(wfrac * n)
+        h = round(geom["height"] * n)
+        # The leading bar carries the accent; the rest are paper, because the ground is now ink.
+        colour = ACCENT if i == 0 else PAPER
+        im.paste(colour, (x0, y0, x0 + w, y0 + h))
+    return im.resize((size, size), Image.LANCZOS)
+
+
+DENSITIES = {"mdpi": (48, 108), "hdpi": (72, 162), "xhdpi": (96, 216), "xxhdpi": (144, 324), "xxxhdpi": (192, 432)}
+
+
+def main():
+    if not os.path.isdir(RES):
+        raise SystemExit(f"no android-staff res dir at {RES}")
+    for density, (legacy_px, fg_px) in DENSITIES.items():
+        d = os.path.join(RES, f"mipmap-{density}")
+        os.makedirs(d, exist_ok=True)
+
+        draw(fg_px, FG, None).save(os.path.join(d, "ic_launcher_foreground.png"))
+        tile = draw(legacy_px, LEGACY, INK)
+        tile.save(os.path.join(d, "ic_launcher.png"))
+        # The launcher applies its own mask, so the round variant is the same tile — which is what
+        # the counter app ships too.
+        tile.save(os.path.join(d, "ic_launcher_round.png"))
+        print(f"  {density}: foreground {fg_px}px, launcher {legacy_px}px")
+
+    bg = os.path.join(RES, "values/ic_launcher_background.xml")
+    with open(bg, "w", encoding="utf-8") as f:
+        f.write('<?xml version="1.0" encoding="utf-8"?>\n<resources>\n'
+                '    <!-- Ink, where the counter app is paper. This is what tells the two apps\n'
+                '         apart on a home screen. -->\n'
+                '    <color name="ic_launcher_background">#201E1D</color>\n</resources>\n')
+    print(f"  background -> #201E1D")
+
+
+if __name__ == "__main__":
+    main()