spatial/src/utils.tsx

// Copyright 2024 Google LLC

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

//     https://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

export function getSvgPathFromStroke(stroke: number[][]) {
  if (!stroke.length) return "";

  const d = stroke.reduce(
    (acc, [x0, y0], i, arr) => {
      const [x1, y1] = arr[(i + 1) % arr.length];
      acc.push(x0, y0, (x0 + x1) / 2, (y0 + y1) / 2);
      return acc;
    },
    ["M", ...stroke[0], "Q"],
  );

  d.push("Z");
  return d.join(" ");
}



export function loadImage(src: string) {
  return new Promise<HTMLImageElement>((resolve, reject) => {
    const img = new Image();
    img.src = src;
    img.onload = () => resolve(img);
    img.onerror = reject;
  });
}