File size: 5,640 Bytes
5e0d7d2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | """Génère les icônes PWA (PNG) sans dépendance externe.
Rendu par supersampling 4x : dégradé de fond, bulle de discussion cyan et
éclair orange — la signature graphique reprise de l'affiche Motocultor.
"""
from __future__ import annotations
import struct
import zlib
from pathlib import Path
OUT = Path(__file__).resolve().parent.parent / "static" / "icons"
SS = 4 # facteur de supersampling
# Palette (voir static/styles.css)
NIGHT_TOP = (13, 40, 49)
NIGHT_BOTTOM = (6, 20, 25)
CYAN = (72, 201, 214)
BUBBLE_FILL = (15, 58, 69)
EMBER = (238, 139, 61)
LIGHTNING = (247, 221, 84)
def lerp(a, b, t):
return tuple(round(x + (y - x) * t) for x, y in zip(a, b))
def rounded_rect_sdf(px, py, x0, y0, x1, y1, r):
"""Distance signée à un rectangle arrondi (négative à l'intérieur)."""
cx = max(x0 + r, min(px, x1 - r))
cy = max(y0 + r, min(py, y1 - r))
dx, dy = px - cx, py - cy
return (dx * dx + dy * dy) ** 0.5 - r
def point_in_poly(px, py, poly):
inside = False
n = len(poly)
for i in range(n):
x0, y0 = poly[i]
x1, y1 = poly[(i + 1) % n]
if (y0 > py) != (y1 > py):
xin = x0 + (py - y0) * (x1 - x0) / (y1 - y0)
if px < xin:
inside = not inside
return inside
def over(dst, src, alpha):
return tuple(round(s * alpha + d * (1 - alpha)) for s, d in zip(src, dst))
def render(size: int, maskable: bool = False) -> bytes:
"""Renvoie les octets RGB (size x size)."""
big = size * SS
# Sur une icône « maskable » Android rogne jusqu'à 20 % : on rétrécit le motif.
pad = 0.28 if maskable else 0.16
radius = big * (0.5 if maskable else 0.22)
# Bulle de discussion
bx0, by0 = big * (pad + 0.02), big * (pad + 0.06)
bx1, by1 = big * (1 - pad - 0.02), big * (1 - pad - 0.16)
br = (bx1 - bx0) * 0.24
stroke = max(1.0, big * 0.018)
# Queue de la bulle
tail = [
(bx0 + (bx1 - bx0) * 0.22, by1 - stroke),
(bx0 + (bx1 - bx0) * 0.44, by1 - stroke),
(bx0 + (bx1 - bx0) * 0.26, by1 + (by1 - by0) * 0.26),
]
# Éclair, centré dans la bulle
cx, cy = (bx0 + bx1) / 2, (by0 + by1) / 2
w, h = (bx1 - bx0) * 0.42, (by1 - by0) * 0.56
bolt = [
(cx + w * 0.16, cy - h * 0.50),
(cx - w * 0.50, cy + h * 0.10),
(cx - w * 0.08, cy + h * 0.10),
(cx - w * 0.20, cy + h * 0.50),
(cx + w * 0.50, cy - h * 0.14),
(cx + w * 0.04, cy - h * 0.14),
]
rows = []
for y in range(size):
row = bytearray()
for x in range(size):
racc = gacc = bacc = 0
for sy in range(SS):
for sx in range(SS):
px = x * SS + sx + 0.5
py = y * SS + sy + 0.5
# Fond : dégradé vertical, arrondi aux coins
col = lerp(NIGHT_TOP, NIGHT_BOTTOM, py / big)
d_bg = rounded_rect_sdf(px, py, 0, 0, big, big, radius)
bg_a = max(0.0, min(1.0, 0.5 - d_bg))
col = over((0, 0, 0), col, bg_a)
# Lueur de braise en bas
gy = max(0.0, (py / big - 0.55) / 0.45)
gx = 1.0 - abs(px / big - 0.5) * 1.6
glow = max(0.0, gy * gx) * 0.30 * bg_a
if glow > 0:
col = over(col, EMBER, glow)
# Bulle : remplissage puis contour cyan
d = rounded_rect_sdf(px, py, bx0, by0, bx1, by1, br)
in_tail = point_in_poly(px, py, tail)
fill_a = max(0.0, min(1.0, 0.5 - d))
if in_tail:
fill_a = 1.0
if fill_a > 0:
col = over(col, BUBBLE_FILL, fill_a)
edge = abs(d) - stroke / 2
edge_a = max(0.0, min(1.0, 0.5 - edge))
if in_tail:
edge_a = max(edge_a, 0.0)
if edge_a > 0:
col = over(col, CYAN, edge_a)
# Éclair
if point_in_poly(px, py, bolt):
col = LIGHTNING
elif point_in_poly(px + stroke * 0.6, py + stroke * 0.6, bolt):
col = EMBER
racc += col[0]
gacc += col[1]
bacc += col[2]
n = SS * SS
row += bytes((racc // n, gacc // n, bacc // n))
rows.append(bytes(row))
return b"".join(b"\x00" + r for r in rows)
def write_png(path: Path, size: int, raw: bytes) -> None:
def chunk(tag: bytes, data: bytes) -> bytes:
body = tag + data
return struct.pack(">I", len(data)) + body + struct.pack(">I", zlib.crc32(body))
header = struct.pack(">IIBBBBB", size, size, 8, 2, 0, 0, 0) # 8 bits, RGB
png = (
b"\x89PNG\r\n\x1a\n"
+ chunk(b"IHDR", header)
+ chunk(b"IDAT", zlib.compress(raw, 9))
+ chunk(b"IEND", b"")
)
path.write_bytes(png)
print(f" {path.name} ({len(png) / 1024:.1f} Ko)")
def main() -> None:
OUT.mkdir(parents=True, exist_ok=True)
print("Génération des icônes :")
for size in (192, 512):
write_png(OUT / f"icon-{size}.png", size, render(size))
for size in (192, 512):
write_png(OUT / f"maskable-{size}.png", size, render(size, maskable=True))
write_png(OUT / "favicon-64.png", 64, render(64))
write_png(OUT / "apple-touch-icon.png", 180, render(180, maskable=True))
if __name__ == "__main__":
main()
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