1/*
2 * Copyright (C) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16export const resizeCanvas = (c: HTMLCanvasElement): void => {
17  let el: Element = (c.getRootNode({ composed: false }) as ShadowRoot).host;
18  let dpr = window.devicePixelRatio || 1;
19  c.width = Math.ceil(el.clientWidth * dpr);
20  c.height = Math.ceil(el.clientHeight * dpr);
21  c.style.width = `${el.clientWidth}px`;
22  c.style.height = `${el.clientHeight}px`;
23  c.getContext('2d', { alpha: true })?.scale(dpr, dpr);
24};
25