You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
2.3 KiB
86 lines
2.3 KiB
'use strict';
|
|
const execa = require('execa');
|
|
const isPng = require('is-png');
|
|
const isStream = require('is-stream');
|
|
const pngquant = require('pngquant-bin');
|
|
const ow = require('ow');
|
|
|
|
const imageminPngquant = (options = {}) => input => {
|
|
const isBuffer = Buffer.isBuffer(input);
|
|
|
|
if (!isBuffer && !isStream(input)) {
|
|
return Promise.reject(new TypeError(`Expected a Buffer or Stream, got ${typeof input}`));
|
|
}
|
|
|
|
if (isBuffer && !isPng(input)) {
|
|
return Promise.resolve(input);
|
|
}
|
|
|
|
const args = ['-'];
|
|
|
|
if (typeof options.speed !== 'undefined') {
|
|
ow(options.speed, ow.number.integer.inRange(1, 11));
|
|
args.push('--speed', options.speed);
|
|
}
|
|
|
|
if (typeof options.strip !== 'undefined') {
|
|
ow(options.strip, ow.boolean);
|
|
|
|
if (options.strip) {
|
|
args.push('--strip');
|
|
}
|
|
}
|
|
|
|
if (typeof options.quality !== 'undefined') {
|
|
ow(options.quality, ow.array.length(2).ofType(ow.number.inRange(0, 1)));
|
|
const [min, max] = options.quality;
|
|
args.push('--quality', `${Math.round(min * 100)}-${Math.round(max * 100)}`);
|
|
}
|
|
|
|
if (typeof options.dithering !== 'undefined') {
|
|
ow(options.dithering, ow.any(ow.number.inRange(0, 1), ow.boolean.false));
|
|
|
|
if (typeof options.dithering === 'number') {
|
|
args.push(`--floyd=${options.dithering}`);
|
|
} else if (options.dithering === false) {
|
|
args.push('--ordered');
|
|
}
|
|
}
|
|
|
|
if (typeof options.posterize !== 'undefined') {
|
|
ow(options.posterize, ow.number);
|
|
args.push('--posterize', options.posterize);
|
|
}
|
|
|
|
if (typeof options.verbose !== 'undefined') {
|
|
ow(options.verbose, ow.boolean);
|
|
args.push('--verbose');
|
|
}
|
|
|
|
const subprocess = execa(pngquant, args, {
|
|
encoding: null,
|
|
maxBuffer: Infinity,
|
|
input
|
|
});
|
|
|
|
const promise = subprocess
|
|
.then(result => result.stdout) // eslint-disable-line promise/prefer-await-to-then
|
|
.catch(error => {
|
|
// We use `error.exitCode` to check for a special condition when running the pngquant binary.
|
|
// See details on handling of "99" code at https://pngquant.org (search for "status code 99").
|
|
if (error.exitCode === 99) {
|
|
return input;
|
|
}
|
|
|
|
error.message = error.stderr || error.message;
|
|
throw error;
|
|
});
|
|
|
|
subprocess.stdout.then = promise.then.bind(promise); // eslint-disable-line promise/prefer-await-to-then
|
|
subprocess.stdout.catch = promise.catch.bind(promise);
|
|
|
|
return subprocess.stdout;
|
|
};
|
|
|
|
module.exports = imageminPngquant;
|
|
module.exports.default = imageminPngquant;
|
|
|