tav-media/lib/libpag/src/utils/canvas.js

Cross platform media editing framework

import { CANVAS_POOL_MAX_SIZE } from '../constant';
const canvasPool = new Array();
export const isOffscreenCanvas = (element) => window.OffscreenCanvas && element instanceof window.OffscreenCanvas;
export const isCanvas = (element) => isOffscreenCanvas(element) || element instanceof HTMLCanvasElement;
export const getCanvas2D = () => {
    return canvasPool.pop() || createCanvas2D();
};
export const releaseCanvas2D = (canvas) => {
    if (canvasPool.length < CANVAS_POOL_MAX_SIZE) {
        canvasPool.push(canvas);
    }
};
const createCanvas2D = () => {
    try {
        const offscreenCanvas = new OffscreenCanvas(0, 0);
        const context = offscreenCanvas.getContext('2d');
        if (context === null || context === void 0 ? void 0 : context.measureText)
            return offscreenCanvas;
        return document.createElement('canvas');
    }
    catch (err) {
        return document.createElement('canvas');
    }
};