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import type { CanvasRenderer } from "../canvas-renderer";
import { BaseNode, type BaseNodeParams } from "./base-node";
import type { Transform } from "@/types/timeline";
const STICKER_EPSILON = 1 / 1000;
export type StickerNodeParams = BaseNodeParams & {
iconName: string;
duration: number;
timeOffset: number;
trimStart: number;
trimEnd: number;
transform: Transform;
opacity: number;
color?: string;
};
export class StickerNode extends BaseNode<StickerNodeParams> {
private image?: HTMLImageElement;
private readyPromise: Promise<void>;
constructor(params: StickerNodeParams) {
super(params);
this.readyPromise = this.load();
}
private async load() {
const image = new Image();
this.image = image;
const color = this.params.color
? `&color=${encodeURIComponent(this.params.color)}`
: "";
const url = `https://api.iconify.design/${this.params.iconName}.svg?width=200&height=200${color}`;
await new Promise<void>((resolve, reject) => {
image.onload = () => resolve();
image.onerror = () =>
reject(new Error(`Failed to load sticker: ${this.params.iconName}`));
image.src = url;
});
}
private getStickerTime(time: number) {
return time - this.params.timeOffset + this.params.trimStart;
}
private isInRange(time: number) {
const stickerTime = this.getStickerTime(time);
return (
stickerTime >= this.params.trimStart - STICKER_EPSILON &&
stickerTime < this.params.trimStart + this.params.duration
);
}
async render({ renderer, time }: { renderer: CanvasRenderer; time: number }) {
await super.render({ renderer, time });
if (!this.isInRange(time)) {
return;
}
await this.readyPromise;
if (!this.image) {
return;
}
const { transform, opacity } = this.params;
const size = 200 * transform.scale;
const x = renderer.width / 2 + transform.position.x - size / 2;
const y = renderer.height / 2 + transform.position.y - size / 2;
renderer.context.save();
renderer.context.globalAlpha = opacity;
if (transform.rotate !== 0) {
const centerX = x + size / 2;
const centerY = y + size / 2;
renderer.context.translate(centerX, centerY);
renderer.context.rotate((transform.rotate * Math.PI) / 180);
renderer.context.translate(-centerX, -centerY);
}
renderer.context.drawImage(this.image, x, y, size, size);
renderer.context.restore();
}
}
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