111 lines
2.2 KiB
JavaScript
111 lines
2.2 KiB
JavaScript
'use strict';
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const execa = require('execa');
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const isJpg = require('is-jpg');
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const mozjpeg = require('mozjpeg');
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module.exports = options => buffer => {
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options = Object.assign({
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trellis: true,
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trellisDC: true,
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overshoot: true
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}, options);
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if (!Buffer.isBuffer(buffer)) {
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return Promise.reject(new TypeError('Expected a buffer'));
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}
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if (!isJpg(buffer)) {
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return Promise.resolve(buffer);
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}
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// TODO: Remove these sometime far in the future
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if (options.fastcrush) {
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return Promise.reject(new Error('Option `fastcrush` was renamed to `fastCrush`'));
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}
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if (options.maxmemory) {
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return Promise.reject(new Error('Option `maxmemory` was renamed to `maxMemory`'));
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}
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if (options.notrellis) {
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return Promise.reject(new Error('Option `notrellis` was renamed to `trellis` and inverted'));
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}
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if (options.noovershoot) {
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return Promise.reject(new Error('Option `noovershoot` was renamed to `overshoot` and inverted'));
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}
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const args = [];
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if (typeof options.quality !== 'undefined') {
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args.push('-quality', options.quality);
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}
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if (options.progressive === false) {
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args.push('-baseline');
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}
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if (options.targa) {
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args.push('-targa');
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}
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if (options.revert) {
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args.push('-revert');
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}
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if (options.fastCrush) {
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args.push('-fastcrush');
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}
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if (typeof options.dcScanOpt !== 'undefined') {
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args.push('-dc-scan-opt', options.dcScanOpt);
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}
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if (!options.trellis) {
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args.push('-notrellis');
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}
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if (!options.trellisDC) {
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args.push('-notrellis-dc');
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}
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if (options.tune) {
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args.push(`-tune-${options.tune}`);
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}
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if (!options.overshoot) {
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args.push('-noovershoot');
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}
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if (options.arithmetic) {
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args.push('-arithmetic');
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}
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if (options.dct) {
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args.push('-dct', options.dct);
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}
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if (options.quantBaseline) {
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args.push('-quant-baseline', options.quantBaseline);
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}
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if (typeof options.quantTable !== 'undefined') {
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args.push('-quant-table', options.quantTable);
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}
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if (options.smooth) {
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args.push('-smooth', options.smooth);
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}
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if (options.maxMemory) {
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args.push('-maxmemory', options.maxMemory);
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}
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if (options.sample) {
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args.push('-sample', options.sample.join(','));
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}
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return execa.stdout(mozjpeg, args, {
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encoding: null,
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input: buffer,
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maxBuffer: Infinity
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});
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};
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