schnee effeckt und fehler Korektur

node_modules/imagemin-optipng/index.js

@@ -1,50 +1,62 @@
 'use strict';
-var ExecBuffer = require('exec-buffer');
-var isPng = require('is-png');
-var optipng = require('optipng-bin');
-var through = require('through2');
+const execBuffer = require('exec-buffer');
+const isPng = require('is-png');
+const optipng = require('optipng-bin');
 
-module.exports = function (opts) {
-	opts = opts || {};
+module.exports = options => async buffer => {
+	options = {
+		optimizationLevel: 3,
+		bitDepthReduction: true,
+		colorTypeReduction: true,
+		paletteReduction: true,
+		interlaced: false,
+		errorRecovery: true,
+		...options
+	};
 
-	return through.ctor({objectMode: true}, function (file, enc, cb) {
-		if (file.isNull()) {
-			cb(null, file);
-			return;
-		}
+	if (!Buffer.isBuffer(buffer)) {
+		throw new TypeError('Expected a buffer');
+	}
 
-		if (file.isStream()) {
-			cb(new Error('Streaming is not supported'));
-			return;
-		}
+	if (!isPng(buffer)) {
+		return buffer;
+	}
 
-		if (!isPng(file.contents)) {
-			cb(null, file);
-			return;
-		}
+	const arguments_ = [
+		'-strip',
+		'all',
+		'-clobber',
+		'-o',
+		options.optimizationLevel,
+		'-out',
+		execBuffer.output
+	];
 
-		var execBuffer = new ExecBuffer();
-		var args = ['-strip', 'all', '-clobber', '-force', '-fix'];
-		var optimizationLevel = opts.optimizationLevel || 2;
+	if (options.errorRecovery) {
+		arguments_.push('-fix');
+	}
 
-		if (typeof optimizationLevel === 'number') {
-			args.push('-o', optimizationLevel);
-		}
+	if (!options.bitDepthReduction) {
+		arguments_.push('-nb');
+	}
 
-		execBuffer
-			.use(optipng, args.concat(['-out', execBuffer.dest(), execBuffer.src()]))
-			.run(file.contents, function (err, buf) {
-				if (err) {
-					err.fileName = file.path;
-					cb(err);
-					return;
-				}
+	if (typeof options.interlaced === 'boolean') {
+		arguments_.push('-i', options.interlaced ? '1' : '0');
+	}
 
-				if (buf.length < file.contents.length) {
-					file.contents = buf;
-				}
+	if (!options.colorTypeReduction) {
+		arguments_.push('-nc');
+	}
 
-				cb(null, file);
-			});
+	if (!options.paletteReduction) {
+		arguments_.push('-np');
+	}
+
+	arguments_.push(execBuffer.input);
+
+	return execBuffer({
+		input: buffer,
+		bin: optipng,
+		args: arguments_
 	});
 };