合并来自Raphael svg的图片

Question

尝试创建
第1步 - 让用户通过Ajax,Raphael和Raphael freetransform上传图像.

步骤2 - 单击按钮以显示合并上载图像中的一个图像.(问题): 我找到了关于转换Raphael svg 1 2 3的类似帖子 ,
所以我也使用Canvg但得到console.log :Resource interpreted as image but transferred with MIME type text/html error: image "" not found.

请帮我找到解决方法.或任何线索如何达到相同的目标(将上传的几个Raphael svg图像转换为一个png/jpeg)？

谢谢!

步骤1

// upload images and ajax show in page
var paper = Raphael($('.upload_img')[0], 400, 200);
$('.upload_btn').click(function(){
    ...
    $.ajax({
        type: "POST",
        url: "index.php",
        data: fd,
        processData: false,
        contentType: false,
        success: function(html){
            var session = ..., file = ... type = ...; 
            function register(el) {
                // toggle handle
            };
            var img = new Image();
            img.onload = function(){
                var r_img = paper.image('img/product/tmp/'+session+'/'+file+type, 0, 0, 200, 200);
                register(r_img);
            };
            img.src = 'img/product/tmp/'+session+'/'+file+type;
        }
    });
});

第2步

// merge and show
$('.merge_btn').click(function(){
    var upload_svg = $('.upload_img').html();
    canvg('canvas', upload_svg);
    console.log('upload_svg'+upload_svg); //<svg height="200" version="1.1" width="400" xmlns="http://www.w3.org/2000/svg" style="overflow-x: hidden; overflow-y: hidden; position: relative; "><desc></desc><defs></defs><image x="0" y="0" width="200" height="216.91973969631235" preserveAspectRatio="none" href="img/product/tmp/bc4d26ceb620852db36074d351883539/6.jpeg"></image></svg>
    // and get error
});


// These code If toggle show Raphael freetransform svg handle, it is work convert several svg handle to one image. but still not found upload image to merge

Answer 1

如果我没有弄错的canvg话，函数期望第二个参数是String包含图像文件路径的 a 。然而，在第 2 步中，您的代码执行以下操作：

    var upload_svg = $('.upload_img').html(); // **** this does not return the image path
    canvg('canvas', upload_svg);

我建议你尝试这样的事情：

    var upload_svg = $('.upload_img').attr('src');
    canvg('canvas', upload_svg);

这将解释这个错误 -Resource interpreted as image but transferred with MIME type text/html它需要一个图像但收到空白HTML。代码的其余部分看起来不错。