initial move to base repo

2023-06-27 13:35:59 +02:00
parent ac0207bf2e
commit ebfff5efee
60 changed files with 4245 additions and 0 deletions
@@ -0,0 +1,44 @@
+const sixelEncode = require('../node_modules/sixel/lib/SixelEncoder').image2sixel;
+const toRGBA8888 = require('../node_modules/sixel/lib/Colors').toRGBA8888;
+
+function createRect(size, color) {
+  const pixels = new Uint32Array(size * size);
+  pixels.fill(toRGBA8888(...color));
+  return sixelEncode(new Uint8ClampedArray(pixels.buffer), size, size);
+}
+
+function createRectMinusOne(size, color) {
+  const pixels = new Uint32Array(size * size);
+  if (size - 1) {
+    const sub = new Uint32Array(size - 1);
+    sub.fill(toRGBA8888(...color));
+    const last = size * (size - 1);
+    for (let y = 0; y < last; y += size) {
+      pixels.set(sub, y);
+    }
+  }
+  return sixelEncode(new Uint8ClampedArray(pixels.buffer), size, size);
+}
+
+async function main() {
+  // clear + cursor and sixelScrolling off
+  process.stdout.write('\x1b[2J\x1b[?25;80h');
+
+  for (let i = 1; i < 300; ++i) {
+    await new Promise(res => setTimeout(() => {
+      process.stdout.write(createRect(i, [0, 255, 0]));
+      res();
+    }, 5));
+  }
+  for (let i = 299; i >= 1; --i) {
+    await new Promise(res => setTimeout(() => {
+      process.stdout.write(createRectMinusOne(i, [0, 255, 0]));
+      res();
+    }, 5));
+  }
+
+  // re-enable cursor and sixel scrolling
+  process.stdout.write('\x1b[2J\x1b[?25;80l');
+}
+
+main();