@etsoo/editor/lib/cjs/ImageUtils.js

ETSOO Free WYSIWYG HTML Editor

'use strict';

/**
 * Image utilies
 */
exports.ImageUtils = void 0;
(function (ImageUtils) {
    /**
     * Calcuate max size
     * @param source Source size
     * @param maxSize Max size
     * @returns Result
     */
    function calcMax(source, maxSize) {
        if (source.width > maxSize || source.height > maxSize) {
            const wr = source.width / maxSize;
            const hr = source.height / maxSize;
            if (hr > wr) {
                return {
                    width: source.width / hr,
                    height: maxSize
                };
            }
            else {
                return {
                    width: maxSize,
                    height: source.height / wr
                };
            }
        }
        else {
            return source;
        }
    }
    ImageUtils.calcMax = calcMax;
    /**
     * Resize
     * @param source Source
     * @param size Target size
     * @param quality Quality
     * @returns Canvas
     */
    async function resize(
    // For Blob, createImageBitmap(blob)
    source, size, quality) {
        // Dynamic load pica
        const pica = (await import('pica')).default;
        // Canvas
        const to = document.createElement("canvas");
        to.width = size.width;
        to.height = size.height;
        // pica instance
        const pi = pica();
        return await pi.resize(source, to, {
            quality,
            unsharpAmount: 160,
            unsharpRadius: 0.6,
            unsharpThreshold: 1
        });
    }
    ImageUtils.resize = resize;
})(exports.ImageUtils || (exports.ImageUtils = {}));