feat: add brand icons for Chrome shortcuts and PWA manifest
Dark cyan-green candlestick icon for hub and four exchanges; generate/sync scripts and docs/shortcut-icon.md. Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
dekun
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#!/usr/bin/env python3
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"""从 brand/icon.svg 逻辑绘制 PNG/ICO，供 Chrome 快捷方式、PWA manifest 使用。"""
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from __future__ import annotations
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import os
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import struct
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import zlib
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REPO = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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OUT = os.path.join(REPO, "brand", "icons")
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def _png_chunk(tag: bytes, data: bytes) -> bytes:
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return (
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struct.pack(">I", len(data))
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+ tag
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+ data
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+ struct.pack(">I", zlib.crc32(tag + data) & 0xFFFFFFFF)
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)
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def _write_png(path: str, size: int, rgba: bytes) -> None:
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raw = b""
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stride = size * 4
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for y in range(size):
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raw += b"\x00" + rgba[y * stride : (y + 1) * stride]
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ihdr = struct.pack(">IIBBBBB", size, size, 8, 6, 0, 0, 0)
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idat = zlib.compress(raw, 9)
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png = (
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b"\x89PNG\r\n\x1a\n"
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+ _png_chunk(b"IHDR", ihdr)
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+ _png_chunk(b"IDAT", idat)
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+ _png_chunk(b"IEND", b"")
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)
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with open(path, "wb") as f:
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f.write(png)
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def _lerp(a: float, b: float, t: float) -> float:
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return a + (b - a) * t
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def _gradient(t: float) -> tuple[int, int, int]:
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if t < 0.55:
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u = t / 0.55
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return (
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int(_lerp(0, 0, u)),
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int(_lerp(212, 139, u)),
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int(_lerp(255, 255, u)),
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)
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u = (t - 0.55) / 0.45
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return (
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int(_lerp(61, 0, u)),
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int(_lerp(255, 255, u)),
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int(_lerp(157, 157, u)),
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)
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def _inside_round_rect(x: int, y: int, size: int, pad: int, radius: int) -> bool:
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if x < pad or y < pad or x >= size - pad or y >= size - pad:
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return False
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r = radius
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if x < pad + r and y < pad + r:
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return (x - pad - r) ** 2 + (y - pad - r) ** 2 <= r * r
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if x >= size - pad - r and y < pad + r:
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return (x - (size - pad - r)) ** 2 + (y - pad - r) ** 2 <= r * r
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if x < pad + r and y >= size - pad - r:
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return (x - pad - r) ** 2 + (y - (size - pad - r)) ** 2 <= r * r
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if x >= size - pad - r and y >= size - pad - r:
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return (x - (size - pad - r)) ** 2 + (y - (size - pad - r)) ** 2 <= r * r
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return True
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def _draw_candle(
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buf: bytearray,
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size: int,
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cx: int,
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top: int,
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bottom: int,
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body_top: int,
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body_bottom: int,
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rgb: tuple[int, int, int],
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wick_w: int = 2,
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body_half: int = 7,
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) -> None:
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for y in range(max(0, top), min(size, bottom + 1)):
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for x in range(cx - wick_w, cx + wick_w + 1):
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if 0 <= x < size:
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i = (y * size + x) * 4
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buf[i : i + 3] = bytes((*rgb, 255))
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for y in range(max(0, body_top), min(size, body_bottom + 1)):
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for x in range(cx - body_half, cx + body_half + 1):
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if 0 <= x < size:
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i = (y * size + x) * 4
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buf[i : i + 3] = bytes((*rgb, 255))
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def render_icon_rgba(size: int) -> bytes:
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buf = bytearray(size * size * 4)
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pad = max(4, size // 14)
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radius = size // 5
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inner_pad = pad + max(2, size // 32)
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ring_w = max(2, size // 48)
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for y in range(size):
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for x in range(size):
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i = (y * size + x) * 4
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if not _inside_round_rect(x, y, size, pad, radius):
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buf[i : i + 4] = b"\x00\x00\x00\x00"
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continue
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if _inside_round_rect(x, y, size, inner_pad, radius - 4):
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buf[i : i + 4] = bytes((18, 24, 42, 255))
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else:
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t = (x + y) / (2 * size)
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r, g, b = _gradient(t)
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buf[i : i + 4] = bytes((r, g, b, 220))
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s = size / 512.0
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def sc(v: int) -> int:
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return int(v * s)
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_draw_candle(buf, size, sc(148), sc(228), sc(332), sc(252), sc(304), (255, 77, 109), sc(8), sc(16))
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_draw_candle(buf, size, sc(228), sc(196), sc(352), sc(220), sc(308), (0, 255, 157), sc(8), sc(16))
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_draw_candle(buf, size, sc(308), sc(240), sc(320), sc(264), sc(304), (0, 255, 157), sc(8), sc(14))
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_draw_candle(buf, size, sc(384), sc(180), sc(300), sc(208), sc(272), (0, 255, 157), sc(8), sc(16))
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ccx, ccy = sc(256), sc(256)
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cr = sc(52)
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for y in range(size):
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for x in range(size):
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d = ((x - ccx) ** 2 + (y - ccy) ** 2) ** 0.5
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if cr - ring_w <= d <= cr:
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t = (x + y) / (2 * size)
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r, g, b = _gradient(t)
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i = (y * size + x) * 4
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buf[i : i + 4] = bytes((r, g, b, 200))
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tri = [
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(sc(236), sc(276)),
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(sc(256), sc(220)),
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(sc(276), sc(276)),
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]
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def _in_tri(px: int, py: int) -> bool:
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x1, y1 = tri[0]
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x2, y2 = tri[1]
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x3, y3 = tri[2]
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d1 = (px - x2) * (y1 - y2) - (x1 - x2) * (py - y2)
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d2 = (px - x3) * (y2 - y3) - (x2 - x3) * (py - y3)
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d3 = (px - x1) * (y3 - y1) - (x3 - x1) * (py - y1)
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has_neg = d1 < 0 or d2 < 0 or d3 < 0
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has_pos = d1 > 0 or d2 > 0 or d3 > 0
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return not (has_neg and has_pos)
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for y in range(size):
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for x in range(size):
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if _in_tri(x, y):
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t = (x + y) / (2 * size)
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r, g, b = _gradient(t)
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i = (y * size + x) * 4
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buf[i : i + 4] = bytes((r, g, b, 255))
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return bytes(buf)
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def _write_ico(path: str, sizes: list[int]) -> None:
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images = []
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for sz in sizes:
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rgba = render_icon_rgba(sz)
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# BGRA bottom-up for ICO
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row = sz * 4
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pixels = bytearray()
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for y in range(sz - 1, -1, -1):
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for x in range(sz):
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i = (y * sz + x) * 4
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pixels.extend([rgba[i + 2], rgba[i + 1], rgba[i], rgba[i + 3]])
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and_row = (sz * 4 + 3) & ~3
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if and_row > sz * 4:
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pixels.extend(b"\x00" * (and_row - sz * 4))
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bmp = b"BM" + struct.pack("<I", 40 + len(pixels)) + b"\x00\x00\x00\x00" + struct.pack(
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"<I", 40
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) + struct.pack("<i", sz) + struct.pack("<i", sz * 2) + struct.pack("<H", 1) + struct.pack(
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"<H", 32
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) + struct.pack("<I", 0) + struct.pack("<I", len(pixels)) + struct.pack("<i", 0) * 4
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images.append((sz, bmp + bytes(pixels)))
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offset = 6 + 16 * len(images)
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parts = [struct.pack("<HHH", 0, 1, len(images))]
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data_parts = []
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for sz, data in images:
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parts.append(
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struct.pack("<BBBBHHII", 32, 32, 0, 0, 1, 32, len(data), offset)
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)
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offset += len(data)
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data_parts.append(data)
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with open(path, "wb") as f:
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f.write(b"".join(parts) + b"".join(data_parts))
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def main() -> None:
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os.makedirs(OUT, exist_ok=True)
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import shutil
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shutil.copy2(
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os.path.join(REPO, "brand", "icon.svg"),
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os.path.join(OUT, "icon.svg"),
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)
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for sz in (16, 32, 180, 192, 512):
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_write_png(os.path.join(OUT, f"icon-{sz}.png"), sz, render_icon_rgba(sz))
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shutil.copy2(os.path.join(OUT, "icon-180.png"), os.path.join(OUT, "apple-touch-icon.png"))
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_write_ico(os.path.join(OUT, "favicon.ico"), [16, 32, 48])
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print(f"DONE {OUT}")
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if __name__ == "__main__":
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main()
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