58 lines
1.5 KiB
JavaScript
58 lines
1.5 KiB
JavaScript
import { Pixmap } from "rkgk/haku.js";
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export class BrushPreview extends HTMLElement {
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constructor() {
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super();
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}
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connectedCallback() {
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this.canvas = this.appendChild(document.createElement("canvas"));
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this.ctx = this.canvas.getContext("2d");
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this.#resizeCanvas();
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}
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#resizeCanvas() {
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this.canvas.width = this.clientWidth;
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this.canvas.height = this.clientHeight;
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if (this.pixmap != null) {
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this.pixmap.destroy();
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}
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this.pixmap = new Pixmap(this.canvas.width, this.canvas.height);
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}
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#renderBrushInner(haku) {
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haku.resetVm();
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let evalResult = haku.evalBrush();
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if (evalResult.status != "ok") {
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return { status: "error", phase: "eval", result: evalResult };
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}
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this.pixmap.clear();
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let renderResult = haku.renderValue(
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this.pixmap,
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this.canvas.width / 2,
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this.canvas.height / 2,
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);
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if (renderResult.status != "ok") {
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return { status: "error", phase: "render", result: renderResult };
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}
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this.ctx.putImageData(this.pixmap.getImageData(), 0, 0);
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return { status: "ok" };
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}
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renderBrush(haku) {
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this.classList.remove("error");
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let result = this.#renderBrushInner(haku);
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if (result.status == "error") {
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this.classList.add("error");
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}
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return result;
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}
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}
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customElements.define("rkgk-brush-preview", BrushPreview);
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