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>
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Amp
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width" />
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<title>fxnode multi-view example</title>
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<link rel="stylesheet" href="./style.css" />
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</head>
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<body>
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<main>
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<header>
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<div>
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<h1>One graph, two views</h1>
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<p>Selection and camera are local to each canvas; graph edits render in both.</p>
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</div>
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<div id="toolbar" role="toolbar" aria-label="Active view tools">
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<label
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>Node
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<select id="node-type">
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<option value="fxnode.shader.value">Value</option>
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<option value="fxnode.shader.color">Color</option>
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<option value="fxnode.shader.math">Math</option>
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<option value="fxnode.shader.noise-texture">Noise Texture</option>
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</select></label
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>
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<button data-action="add">Add</button>
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<button data-action="delete" disabled>Delete</button>
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<button data-action="mute" aria-pressed="false" disabled>Mute</button>
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<output id="toolbar-status" aria-live="polite"></output>
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</div>
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</header>
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<section class="views">
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<article class="active">
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<h2>Material detail</h2>
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<canvas id="view-a"></canvas>
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</article>
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<article>
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<h2>Output overview</h2>
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<canvas id="view-b"></canvas>
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</article>
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</section>
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</main>
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<script type="module" src="./main.ts"></script>
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</body>
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</html>
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import type { FxNodeView } from "@lib/index.js";
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import { createApplicationFxNode } from "../blender/application-browser.js";
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import initialLayout from "../blender/all-supported/initialLayout.json" with { type: "json" };
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import { prepareFxNodeBrowserHost } from "../shared/browser-host.js";
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const canvases = [
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document.querySelector<HTMLCanvasElement>("#view-a")!,
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document.querySelector<HTMLCanvasElement>("#view-b")!,
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];
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const toolbar = document.querySelector<HTMLElement>("#toolbar")!;
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const nodeType = document.querySelector<HTMLSelectElement>("#node-type")!;
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const addButton = toolbar.querySelector<HTMLButtonElement>("[data-action=add]")!;
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const deleteButton = toolbar.querySelector<HTMLButtonElement>("[data-action=delete]")!;
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const muteButton = toolbar.querySelector<HTMLButtonElement>("[data-action=mute]")!;
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const status = toolbar.querySelector<HTMLOutputElement>("#toolbar-status")!;
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let activeIndex = 0,
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toolbarPending = false,
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cleaned = false,
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root: Awaited<ReturnType<typeof createApplicationFxNode>> | null = null;
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const views: FxNodeView[] = [],
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unsubscribers: (() => void)[] = [];
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const hosts = canvases.map((canvas) => prepareFxNodeBrowserHost({ canvas, lifecycle: "detach-on-disconnect" }));
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const renderCounts = [0, 0];
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function updateToolbar() {
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const snapshot = views[activeIndex]?.getHostSnapshot();
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const muted = snapshot?.selection.mute.enabled === true && snapshot.selection.mute.state === "all-muted";
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addButton.disabled = toolbarPending || !views[activeIndex];
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deleteButton.disabled = toolbarPending || !snapshot?.selection.canRemove;
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muteButton.disabled = toolbarPending || snapshot?.selection.mute.enabled !== true;
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muteButton.setAttribute("aria-pressed", String(muted));
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muteButton.textContent = muted ? "Unmute" : "Mute";
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}
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function activate(index: number) {
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activeIndex = index;
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canvases.forEach((canvas, candidate) => canvas.parentElement?.classList.toggle("active", candidate === index));
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updateToolbar();
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}
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const pointerListeners = canvases
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.map((canvas, index) => {
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const listener = () => activate(index);
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canvas.addEventListener("pointerdown", listener);
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return [{ canvas, listener }];
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})
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.flat();
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const toolbarListener = async (event: Event) => {
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const action = (event.target as HTMLElement).closest<HTMLButtonElement>("button")?.dataset.action,
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view = views[activeIndex];
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if (!action || !view || toolbarPending) return;
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toolbarPending = true;
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status.textContent = "";
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updateToolbar();
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try {
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const viewport = hosts[activeIndex]!.currentViewport;
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await (action === "add"
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? view.addNode({
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typeId: nodeType.value,
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viewPosition: { x: viewport.width / 2, y: viewport.height / 2 },
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})
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: action === "delete"
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? view.removeSelected()
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: view.setSelectedMuted(muteButton.getAttribute("aria-pressed") !== "true"));
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} catch (error) {
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status.textContent = error instanceof Error ? error.message : "Action failed";
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} finally {
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toolbarPending = false;
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if (!cleaned) updateToolbar();
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}
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};
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toolbar.addEventListener("click", toolbarListener);
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async function cleanup() {
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if (cleaned) return;
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cleaned = true;
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window.removeEventListener("pagehide", cleanup);
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toolbar.removeEventListener("click", toolbarListener);
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for (const { canvas, listener } of pointerListeners) canvas.removeEventListener("pointerdown", listener);
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unsubscribers.forEach((unsubscribe) => unsubscribe());
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hosts.forEach((host) => host.destroy());
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await Promise.allSettled(views.map((view) => view.detach()));
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root?.destroy();
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root = null;
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handle.root = null;
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handle.views = [];
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}
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const handle: MultiViewExampleHandle = { root: null, views, ready: Promise.resolve(), cleanup, renderCounts };
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window.fxnodeMultiView = handle;
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window.addEventListener("pagehide", cleanup);
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handle.ready = (async () => {
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try {
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const created = await createApplicationFxNode();
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if (cleaned) {
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created.destroy();
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return;
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}
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root = created;
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handle.root = created;
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await root.setState(initialLayout);
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for (const [index, canvas] of canvases.entries()) {
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const host = hosts[index]!,
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viewport = host.initialViewport;
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const context = canvas.getContext("2d")!,
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drawImage = context.drawImage.bind(context);
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context.drawImage = ((...args: Parameters<CanvasRenderingContext2D["drawImage"]>) => {
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renderCounts[index]!++;
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Reflect.apply(drawImage, context, args);
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}) as typeof context.drawImage;
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const view = await root.attachView({
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canvas,
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viewport,
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initialCamera: index
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? { center: { x: 2080, y: -400 }, zoom: 0.45 }
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: { center: { x: 480, y: -550 }, zoom: 0.5 },
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});
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views.push(view);
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host.attach(root, view);
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unsubscribers.push(view.subscribeHost(updateToolbar));
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}
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await Promise.all(views.map((view) => view.whenRendered()));
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updateToolbar();
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} catch (error) {
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await cleanup();
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throw error;
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}
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})();
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+84
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:root {
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color-scheme: dark;
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font-family: Inter, system-ui, sans-serif;
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background: #101216;
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color: #f1f3f5;
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}
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* {
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box-sizing: border-box;
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}
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body {
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margin: 0;
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}
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main {
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width: 1160px;
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margin: 24px auto;
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}
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header {
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display: flex;
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align-items: end;
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justify-content: space-between;
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margin-bottom: 16px;
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}
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h1 {
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margin: 0 0 5px;
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font-size: 25px;
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}
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p {
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margin: 0;
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color: #adb5bd;
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}
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#toolbar {
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display: flex;
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align-items: center;
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gap: 8px;
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padding: 9px;
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background: #1d1f23;
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border: 1px solid #343a40;
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border-radius: 7px;
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}
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select,
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button {
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padding: 7px 10px;
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color: inherit;
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background: #292c31;
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border: 1px solid #495057;
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border-radius: 4px;
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}
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button:hover {
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border-color: #748ffc;
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}
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button:disabled {
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opacity: 0.45;
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}
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#toolbar-status {
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max-width: 180px;
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color: #ff8787;
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font-size: 12px;
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}
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.views {
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display: grid;
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grid-template-columns: 1fr 1fr;
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gap: 16px;
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}
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article {
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padding: 8px;
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background: #181a1f;
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border: 2px solid transparent;
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border-radius: 8px;
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}
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article.active {
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border-color: #5c7cfa;
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}
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h2 {
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margin: 2px 3px 9px;
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font-size: 14px;
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color: #ced4da;
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}
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canvas {
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display: block;
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width: 554px;
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height: 520px;
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background: #1d1f23;
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touch-action: none;
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}
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