feat: add render graph driven renderer architecture

Amp-Thread-ID: https://ampcode.com/threads/T-019f9d91-77c1-7206-a60f-ed6554ce92ab Co-authored-by: Heaust Azure <heaust.azure@gmail.com>
2026-07-27 02:53:44 +00:00
parent 8a8369706b
commit d4e8634f67
290 changed files with 48804 additions and 1995 deletions
@@ -0,0 +1,42 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import {
+  advancePointerLaneFence,
+  createPointerLane,
+  pointerLaneFence,
+  publishPointerMove,
+  readPointerMove,
+  type PointerMoveWire,
+} from "@lib/browser/pointer-lane.js";
+
+const move = (x: number, y: number): PointerMoveWire => ({
+  kind: "pointer",
+  phase: "move",
+  pointerId: 7,
+  pointerType: "pen",
+  position: { x, y },
+  button: -1,
+  buttons: 1,
+  modifiers: 8,
+});
+
+test("shared pointer lane publishes exact latest coordinates and fences", () => {
+  const lane = createPointerLane();
+  assert.equal(pointerLaneFence(lane), 0);
+  const generation = 0x1_0000_0007;
+  const sequence = publishPointerMove(lane, move(-12.25, 987.125), generation);
+  assert.equal(sequence, 1);
+  assert.deepEqual(readPointerMove(lane), { sequence: 1, hostGeneration: generation, event: move(-12.25, 987.125) });
+  assert.equal(advancePointerLaneFence(lane), 1);
+  assert.equal(pointerLaneFence(lane), 1);
+  assert.equal(publishPointerMove(lane, { ...move(4, 5), pointerType: "unknown" }, generation + 1), undefined);
+  assert.deepEqual(readPointerMove(lane), { sequence: 1, hostGeneration: generation, event: move(-12.25, 987.125) });
+});
+
+test("shared pointer lane rejects an in-progress publication", () => {
+  const lane = createPointerLane();
+  publishPointerMove(lane, move(1, 2), 3);
+  const words = new Int32Array(lane);
+  Atomics.store(words, 0, Atomics.load(words, 0) | 1);
+  assert.equal(readPointerMove(lane), undefined);
+});