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jsPDF-lib を使用して PDF ファイルに画像を追加しようとしています。PDF が作成されますが、画像が破損しており、次のようになります。

ここに画像の説明を入力

ここの例のように、コードで同じ Data-URL を使用しています: http://parall.ax/products/jspdf 私の完全なコードは以下に添付されています:

    <!DOCTYPE html>
<!--
    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing,
    software distributed under the License is distributed on an
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.
-->
<html>
    <head>
        <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height, target-densitydpi=device-dpi" />
        <link rel="stylesheet" type="text/css" href="css/index.css" />
                <!-- Scripts down here -->
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
        <script type="text/javascript" src="jspdf.js"></script>
        <script type="text/javascript" src="jspdf.plugin.addimage.js"></script>
        <title>Hello World</title>
    </head>
    <body>
        <script type="text/javascript" src="cordova-2.7.0.js"></script>
        <script type="text/javascript">
        var doc;

        function clicked()  {
            doc = new jsPDF();
            var imgData = 'data:image/jpeg;base64, ***DATAURL_HERE***';
            doc.setFontSize(40);
            doc.text(35, 25, "Test-PDF");
            doc.addImage(imgData, 'JPEG', 15, 40, 180, 180);
            writeFile();
            alert("File was written");
            }

        function writeFile() {
            window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onFSSuccess, onError);
        }

        function onFSSuccess(fs) {
            fileSystem = fs;
            createRoot();            
        }

        function createRoot(e) {
            fileSystem.root.getDirectory("Download/", {create: true}, createFile);
        }

        function createFile(dirEntry) {
            var dir = "Test.pdf";
            dirEntry.getFile(dir, {create: true, exclusive: true}, saveFileToRoot);
        }

        function saveFileToRoot(f) {
            f.createWriter(function(writerOb) {
                writerOb.write(doc.output());
            });
        }

        function onError(e) {
        }

        </script>
    <h1>Testfile working</h1>
    <button onclick="clicked()">Clickme</button>
    </body>
</html>

何か案は！？すべての助けに感謝します！

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