javascript - FabricJS 支持哪些类型的 SVG 文件？

Question

我使用以下代码通过 FabricJS 将 SVG 文件添加到 Canvas :

    fabric.loadSVGFromURL(stampURL, function (objects, options) {
    var obj = fabric.util.groupSVGElements(objects, options);
    obj.set({
        fill: stampColor,
        left: stampX,
        top: stampY,
        scaleY: stampScale,
        scaleX: stampScale,
        originX: 'center',
        originY: 'center',
        hasControls: false,
        hasBorders: true,
        selectable: false,
        perPixelTargetFind: true
    });
    Fcanvas.add(obj).renderAll();
});

对于某些文件来说它工作得很好。这些好的文件最初是 XAML 文件，我使用 Inkscape 将它们转换为 SVG。

今天，我从图形设计师处获得了新的 SVG 文件，并且我开始在控制台中收到这些错误:

fabric1_5dev.js:4264 TypeError: (this.getObjects(...)[0].get(...) || "").toLowerCase is not a function
    at klass.fabric.PathGroup.fabric.util.createClass.isSameColor (..../js/fabric1_5dev.js:17008:68)
    at klass.fabric.PathGroup.fabric.util.createClass._set (..../js/fabric1_5dev.js:16928:44)
    at klass._set (..../js/fabric1_5dev.js:3499:52)
    at klass.fabric.Object.fabric.util.createClass._setObject (..../js/fabric1_5dev.js:12368:14)
    at klass.fabric.Object.fabric.util.createClass.set (..../js/fabric1_5dev.js:12381:14)
    at ..../js/FCanvasFunc.js:143:13
    at ..../js/fabric1_5dev.js:5202:11
    at null.callback (..../js/fabric1_5dev.js:4832:11)
    at fabric.ElementsParser.checkIfDone (..../js/fabric1_5dev.js:5373:10)
    at ..../js/fabric1_5dev.js:5351:11

文件是使用 Adob​​e Illustrator 生成的:“生成器:Adobe Illustrator 14.0.0，SVG 导出插件。SVG 版本:6.00 Build 43363”

我必须提到这些文件可以在浏览器或 Inkscape 中完美打开。

我什至尝试将这些文件加载​​到 Inkscape 中并将它们另存为纯 SVG，但这也没有帮助。

这是一个不起作用的 SVG 文件:

<?xml version="1.0" encoding="utf-8"?>

    <linearGradient id="SVGID_1_" gradientUnits="userSpaceOnUse" x1="-351.3892" y1="-681.873" x2="-351.3892" y2="-655.4012" gradientTransform="matrix(1.4838 0 0 1.4838 558.5508 1038.5566)">
    <stop  offset="0" style="stop-color:#72C5EE"/>
    <stop  offset="0.2578" style="stop-color:#6EBEE6"/>
    <stop  offset="0.6475" style="stop-color:#61ACD2"/>
    <stop  offset="1" style="stop-color:#5396B9"/>
</linearGradient>
<path fill="url(#SVGID_1_)" stroke="#29AAE1" stroke-width="0.9549" stroke-linecap="round" stroke-linejoin="round" d="
    M42.422,31.788h-0.889c1.879-1.359,3.111-3.555,3.111-6.051c0-4.135-3.348-7.485-7.48-7.485c-4.135,0-7.485,3.351-7.485,7.485
    c0,2.496,1.233,4.691,3.112,6.051h-0.893c-2.418,0-4.381,2.157-4.381,4.817v29.855c0,0.373,4.738,2.292,9.417,2.292
    c4.733,0,9.757-1.21,9.757-1.21c0.07-0.346,0.111-0.709,0.111-1.082V36.605C46.803,33.944,44.843,31.788,42.422,31.788z"/>

    <linearGradient id="SVGID_2_" gradientUnits="userSpaceOnUse" x1="-335.3667" y1="-684.248" x2="-335.3667" y2="-654.8643" gradientTransform="matrix(1.4838 0 0 1.4838 558.5508 1038.5566)">
    <stop  offset="0" style="stop-color:#F05856"/>
    <stop  offset="0.3137" style="stop-color:#F0544E"/>
    <stop  offset="0.7879" style="stop-color:#EF483A"/>
    <stop  offset="1" style="stop-color:#EE422E"/>
</linearGradient>
<path fill="url(#SVGID_2_)" stroke="#EE422E" stroke-width="0.9549" stroke-linecap="round" stroke-linejoin="round" d="
    M65.733,34.999h-1.101c1.662-1.169,2.753-3.092,2.753-5.276c0-3.564-2.888-6.453-6.452-6.453s-6.455,2.889-6.455,6.453
    c0,2.185,1.093,4.107,2.754,5.276h-1.098c-2.21,0-3.997,2.007-3.997,4.481V65.42c0,0,4.332,1.449,9.723,1.449
    c4.183,0,7.87-2.173,7.87-2.173V39.48C69.73,37.006,67.942,34.999,65.733,34.999z"/>

    <linearGradient id="SVGID_3_" gradientUnits="userSpaceOnUse" x1="-343.6499" y1="-672.3726" x2="-343.6499" y2="-656.6719" gradientTransform="matrix(1.4838 0 0 1.4838 558.5508 1038.5566)">
    <stop  offset="0" style="stop-color:#B3D234"/>
    <stop  offset="0.2935" style="stop-color:#ABCB36"/>
    <stop  offset="0.7372" style="stop-color:#97B83A"/>
    <stop  offset="1" style="stop-color:#87AA3E"/>
</linearGradient>
<path fill="url(#SVGID_3_)" stroke="#87AA3E" stroke-width="0.9549" stroke-linecap="round" stroke-linejoin="round" d="
    M53.5,45.788h-1.957c1.786-1.083,2.991-3.029,2.991-5.271c0-3.411-2.769-6.18-6.183-6.18s-6.182,2.769-6.182,6.182
    c0,2.24,1.205,4.187,2.99,5.27l-1.371,0.002c-2.236,0-4.044,1.81-4.044,4.042v19.027c0,0,3.899,1.621,9.291,1.621
    c5.067,0,8.507-1.131,8.507-1.131V49.831C57.543,47.6,55.735,45.788,53.5,45.788z"/>

    <linearGradient id="SVGID_4_" gradientUnits="userSpaceOnUse" x1="-357.6011" y1="-672.7729" x2="-357.6011" y2="-652.2373" gradientTransform="matrix(1.4838 0 0 1.4838 558.5508 1038.5566)">
    <stop  offset="0" style="stop-color:#FFCC05"/>
    <stop  offset="0.2578" style="stop-color:#FEC408"/>
    <stop  offset="0.6475" style="stop-color:#FBB012"/>
    <stop  offset="1" style="stop-color:#F7971D"/>
</linearGradient>
<path fill="url(#SVGID_4_)" stroke="#FAAF3B" stroke-width="0.9549" stroke-linecap="round" stroke-linejoin="round" d="
    M31.272,50.715c1.459-1.042,2.417-2.739,2.417-4.67c0-3.176-2.576-5.749-5.748-5.749s-5.744,2.573-5.744,5.749
    c0,1.931,0.959,3.628,2.418,4.67c-2.238,0.22-3.992,2.044-3.992,4.287v14.213c0,0,3.713,1.552,7.806,1.552
    c3.378,0,6.835-1.552,6.835-1.552V55.002C35.264,52.759,33.51,50.935,31.272,50.715z"/>

知道这个文件有什么问题吗？

更新: 我怀疑渐变填充颜色，并尝试了以相同方式创建的另一个文件，但没有渐变填充颜色，它可以工作。所以看起来这就是问题所在。

有谁知道FabricJS是否不支持包含线性渐变着色的文件？

更新: 相同的 SVG 在 kitchensink 中工作，因此问题可能出在我的加载代码中。 有什么想法吗？

Answer 1

好的!!找到了。

FabricJS 失败，因为我尝试为此 SVG 设置感觉颜色。 问题出在函数:isSameColor

这是 Andrea Bogazzi 在 GitHub 中向我提供的修复程序。

fabric.PathGroup.prototype.isSameColor = function() {
var firstPathFill = this.getObjects()[0].get('fill') || '';
  if (typeof firstPathFill !== 'string') {
    return false;
  }
  firstPathFill = firstPathFill.toLowerCase();
  return this.getObjects().every(function(path) {
    var pathFill = path.get('fill') || '';
    return typeof pathFill === 'string' && (pathFill).toLowerCase() === firstPathFill;
   });
 };