hastily

Version:
express middleware to simulate fastly cdn
57 lines • 3.73 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const resize_1 = require("./resize");
/**
 * @hidden
 */
const resizeCanvas = (sharp, params) => {
    let background = 'white';
    if (params.has('bg-color')) {
        try {
            background = params.toColor('bg-color');
        }
        catch (e) {
            // let it be the original;
        }
    }
    const options = {
        background,
        fit: 'contain',
        withoutEnlargement: false,
    };
    let region;
    try {
        region = params.toRegion('canvas');
    }
    catch (e) {
        return false;
    }
    if (Number(region.left) > 0 || Number(region.top) > 0) {
        params.warn('unsupported', 'canvas', 'pixel-specific (greater than 0) canvas offsets. Will not apply canvas.');
        return false;
    }
    const positions = [];
    if (region.left === 0) {
        positions.push('left');
    }
    if (region.top === 0) {
        positions.push('top');
    }
    if (positions.length > 0) {
        options.position = positions.join(' ');
    }
    if (params.has('fit')) {
        const fitOpt = params.get('fit');
        const fit = resize_1.optoFitToSharp[fitOpt];
        if (fit) {
            options.fit = fit;
        }
        else {
            params.warn('unsupported', 'fit');
        }
    }
    params.log.debug('sharp.resize(%s, %s, %o)', region.width, region.height, options);
    return sharp.resize(region.width, region.height, options);
};
exports.default = resizeCanvas;
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