HTML5画布到PDF [英] HTML5 canvas to PDF

问题描述

我正在使用HTML5并使用canvas作为设计工具。但是我想将我的canvas保存为jpeg文件，因为默认为image / png，我想在PDF中显示我的canvas的预览。

I am working in HTML5 and using canvas as designing tool.However I want to save my canvas in a jpeg file as default is image/png and I want to show the preview of my canvas in a a PDF.

我希望能很快得到帮助。

I hope to get the help soon.

推荐答案

好的方法是使用jspdf.js和html2canvas的组合。

A good approach is to use combination of jspdf.js and html2canvas.

 <canvas id="canvas" width="480" height="320"></canvas> 
      <button id="download">Download Pdf</button>

'

        html2canvas($("#canvas"), {
            onrendered: function(canvas) {         
                var imgData = canvas.toDataURL(
                    'image/png');              
                var doc = new jsPDF('p', 'mm');
                doc.addImage(imgData, 'PNG', 10, 10);
                doc.save('sample-file.pdf');
            }
        });

jsfiddle： http://jsfiddle.net/p4s5k59s/1222/

jsfiddle: http://jsfiddle.net/p4s5k59s/1222/

使用Chrome 38，IE11和Firefox 34进行测试。对于Safari，您可能需要将图像格式更改为JPEG fron PNG。

Tested in Chrome 38, IE11 and Firefox 34. For Safari, you might need to change the image format to JPEG fron PNG.

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