initial commit

scripts/generate-icons.js

@@ -0,0 +1,84 @@
+import { writeFileSync, mkdirSync } from 'fs';
+import { join, dirname } from 'path';
+import { fileURLToPath } from 'url';
+import zlib from 'zlib';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const iconsDir = join(__dirname, '..', 'static', 'icons');
+mkdirSync(iconsDir, { recursive: true });
+
+function crc32(buf) {
+  let crc = 0xffffffff;
+  for (let i = 0; i < buf.length; i++) {
+    crc ^= buf[i];
+    for (let j = 0; j < 8; j++) {
+      crc = (crc >>> 1) ^ (crc & 1 ? 0xedb88320 : 0);
+    }
+  }
+  return (crc ^ 0xffffffff) >>> 0;
+}
+
+function createChunk(type, data) {
+  const typeBytes = Buffer.from(type, 'ascii');
+  const len = Buffer.alloc(4);
+  len.writeUInt32BE(data.length);
+  const body = Buffer.concat([typeBytes, data]);
+  const crc = Buffer.alloc(4);
+  crc.writeUInt32BE(crc32(body));
+  return Buffer.concat([len, body, crc]);
+}
+
+function generatePNG(size) {
+  const bg = [0x1a, 0x1a, 0x2e];
+  const gold = [0xc5, 0xa5, 0x5a];
+
+  const pixels = [];
+  for (let y = 0; y < size; y++) {
+    pixels.push(0);
+    for (let x = 0; x < size; x++) {
+      if (isCross(x, y, size)) {
+        pixels.push(...gold);
+      } else {
+        pixels.push(...bg);
+      }
+    }
+  }
+
+  const raw = Buffer.from(pixels);
+  const compressed = zlib.deflateSync(raw);
+
+  const ihdr = Buffer.alloc(13);
+  ihdr.writeUInt32BE(size, 0);
+  ihdr.writeUInt32BE(size, 4);
+  ihdr[8] = 8;
+  ihdr[9] = 2;
+  ihdr[10] = 0;
+  ihdr[11] = 0;
+  ihdr[12] = 0;
+
+  const signature = Buffer.from([137, 80, 78, 71, 13, 10, 26, 10]);
+
+  return Buffer.concat([
+    signature,
+    createChunk('IHDR', ihdr),
+    createChunk('IDAT', compressed),
+    createChunk('IEND', Buffer.alloc(0)),
+  ]);
+}
+
+function isCross(x, y, size) {
+  const cx = Math.floor(size / 2);
+  const cy = Math.floor(size / 2);
+  const arm = Math.max(2, Math.floor(size * 0.06));
+  const halfLen = Math.floor(size * 0.32);
+  const topLen = Math.floor(size * 0.38);
+
+  const inVert = Math.abs(x - cx) <= arm && y >= cy - topLen && y <= cy + halfLen;
+  const inHoriz = Math.abs(y - cy) <= arm && x >= cx - halfLen && x <= cx + halfLen;
+
+  return inVert || inHoriz;
+}
+
+writeFileSync(join(iconsDir, 'icon-192.png'), generatePNG(192));
+writeFileSync(join(iconsDir, 'icon-512.png'), generatePNG(512));
+console.log('Icons generated.');