Numex yayın: generate_icons.js

generate_icons.js

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+const fs = require('fs');
+const path = require('path');
+const zlib = require('zlib');
+
+// Standard CRC32 calculation for PNG chunk checksums
+function crc32(buf) {
+  let c;
+  const table = new Uint32Array(256);
+  for (let n = 0; n < 256; n++) {
+    c = n;
+    for (let k = 0; k < 8; k++) {
+      c = (c & 1) ? (0xedb88320 ^ (c >>> 1)) : (c >>> 1);
+    }
+    table[n] = c;
+  }
+  let crc = 0xffffffff;
+  for (let i = 0; i < buf.length; i++) {
+    crc = table[(crc ^ buf[i]) & 0xff] ^ (crc >>> 8);
+  }
+  return (crc ^ 0xffffffff) >>> 0;
+}
+
+function makeChunk(type, data) {
+  const len = Buffer.alloc(4);
+  len.writeUInt32BE(data.length, 0);
+  const typeBuf = Buffer.from(type, 'ascii');
+  const crcBuf = Buffer.alloc(4);
+  const crcVal = crc32(Buffer.concat([typeBuf, data]));
+  crcBuf.writeUInt32BE(crcVal, 0);
+  return Buffer.concat([len, typeBuf, data, crcBuf]);
+}
+
+function createPNG(width, height) {
+  // Signature
+  const sig = Buffer.from([137, 80, 78, 71, 13, 10, 26, 10]);
+
+  // IHDR
+  const ihdrData = Buffer.alloc(13);
+  ihdrData.writeUInt32BE(width, 0);
+  ihdrData.writeUInt32BE(height, 4);
+  ihdrData[8] = 8; // bit depth
+  ihdrData[9] = 6; // color type RGBA
+  ihdrData[10] = 0; // compression
+  ihdrData[11] = 0; // filter
+  ihdrData[12] = 0; // interlace
+  const ihdr = makeChunk('IHDR', ihdrData);
+
+  // IDAT - Pixel generation (Car Icon: MSN Teal/Blue background with Red Sports Car outline)
+  const rawLines = [];
+  const cx = width / 2;
+  const cy = height / 2;
+
+  for (let y = 0; y < height; y++) {
+    const line = Buffer.alloc(1 + width * 4);
+    line[0] = 0; // filter type 0 (None)
+    for (let x = 0; x < width; x++) {
+      const idx = 1 + x * 4;
+      const dx = (x - cx) / (width / 2);
+      const dy = (y - cy) / (height / 2);
+      const dist = Math.sqrt(dx * dx + dy * dy);
+
+      // Background rounded square / circle gradient
+      if (dist <= 0.85) {
+        // MSN Blue / Dark gradient background
+        line[idx] = 15;     // R
+        line[idx + 1] = 23; // G
+        line[idx + 2] = 42; // B
+        line[idx + 3] = 255;// A
+
+        // Draw Car body shapes
+        const carX = Math.abs(dx);
+        const carY = dy;
+        if (carX < 0.45 && carY > -0.6 && carY < 0.6) {
+          // Car body red/neon
+          line[idx] = 244;
+          line[idx + 1] = 63;
+          line[idx + 2] = 94;
+
+          // Windshield (dark cyan)
+          if (carY > -0.3 && carY < 0.0 && carX < 0.3) {
+            line[idx] = 56;
+            line[idx + 1] = 189;
+            line[idx + 2] = 248;
+          }
+          // Yellow headlights
+          if (carY < -0.45 && carX > 0.2) {
+            line[idx] = 250;
+            line[idx + 1] = 204;
+            line[idx + 2] = 21;
+          }
+        }
+      } else {
+        // Transparent border
+        line[idx] = 0;
+        line[idx + 1] = 0;
+        line[idx + 2] = 0;
+        line[idx + 3] = 0;
+      }
+    }
+    rawLines.push(line);
+  }
+
+  const uncompressed = Buffer.concat(rawLines);
+  const compressed = zlib.deflateSync(uncompressed);
+  const idat = makeChunk('IDAT', compressed);
+
+  // IEND
+  const iend = makeChunk('IEND', Buffer.alloc(0));
+
+  return Buffer.concat([sig, ihdr, idat, iend]);
+}
+
+const sizes = [16, 48, 128];
+const targetDir = __dirname;
+
+sizes.forEach(sz => {
+  const fileBuf = createPNG(sz, sz);
+  const filePath = path.join(targetDir, `icon${sz}.png`);
+  fs.writeFileSync(filePath, fileBuf);
+  console.log(`Created ${filePath} (${sz}x${sz})`);
+});