Question

我正在尝试使用fabricjs将SVG图像转换为画布（之后转换为PNG）。它有效，但看起来我想念一些重要的参数

您可以在此处查看转化结果 http://staging.chiplab.com/test/1.html 原创svg http://staging.chiplab.com/test/1.svg

我用于转换的代码：

<script src="https://staging.chiplab.com/test/fabric.js" data-cover></script>
<canvas id="canvas" width="600" height="600"></canvas> 
<script>

var canvas = new fabric.Canvas('canvas');
fabric.loadSVGFromURL('https://staging.chiplab.com/test/1.svg', function(objects, options) {
  var obj = fabric.util.groupSVGElements(objects, options);
  canvas.add(obj).renderAll();
});    
</script>

由于某些原因，当浏览器解析svg时，它相对于父块定位图像

   <svg id="fore" width="556.1568" height="556.1568" x="117.42160000000001" y="18.45" overflow="none" style="pointer-events:none">
    <image x="0" y="0" width="556.1568" height="556.1568" style="pointer-events:inherit" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://staging.chiplab.com/media/uploads/dol/2/147751672809184826599.png" preserveAspectRatio="none" transform="rotate(0,278.0784,278.0784)"></image>
    </svg>

但是，当使用fabricjs解析时，图像位置为0：0坐标。我认为fabricjs有可能避免这种行为，但我在文档中找不到它。

感谢大家的回复！

Answer 1

不支持Somve svg功能。此SVG在路径上有文本以及fabricjs仍然无法解析的其他一些功能。如果要转换为图像，请将其加载为图像。并在画布上绘画。

您的域名似乎存在来自此svg的加载问题，与crossOrigin或内部svg部件有关。

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<svg id="canvasBleed1" width="556.1568" height="556.1568" x="117.42160000000001" y="18.45" overflow="none" style="display:none"> <rect id="backrect1" width="100%" height="100%" x="0" y="0" stroke-width="2" stroke-dasharray="10 8" stroke="#00ff00" fill="none" style="pointer-events:none"></rect> <rect id="textrect1" width="45px" height="8px" x="0" y="0" fill="#00ff00" style="pointer-events:none"></rect> <text id="bleedText1" x="1" y="6" font-size="8px" font-family="Arial" fill="#ffffff" style="pointer-events:none">safe margin</text> </svg> <svg id="canvasGrid" width="556.1568" height="556.1568" x="117.42160000000001" y="18.45" overflow="visible" display="none"> <rect width="100%" height="100%" x="0" y="0" stroke-width="0" stroke="none" fill="url(#gridpattern)" style="pointer-events: none; display:visible;"></rect> </svg> <svg id="fore" width="556.1568" height="556.1568" x="117.42160000000001" y="18.45" overflow="none" style="pointer-events:none"> <image x="0" y="0" width="556.1568" height="556.1568" style="pointer-events:inherit" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://staging.chiplab.com/media/uploads/dol/2/147751672809184826599.png" preserveAspectRatio="none" transform="rotate(0,278.0784,278.0784)"></image> </svg> <g id="selectorParentGroup" transform="translate(117.42160000000001,18.45)"> <g display="none"> <rect id="selectorGrip_resize_nw" fill="#2c9ff8" width="12" height="12" style="cursor:nw-resize" stroke="#222" pointer-events="all"></rect> <rect id="selectorGrip_resize_n" fill="#2c9ff8" width="12" height="12" style="cursor:n-resize" stroke="#222" pointer-events="all"></rect> <rect id="selectorGrip_resize_ne" fill="#2c9ff8" width="12" height="12" style="cursor:ne-resize" stroke="#222" pointer-events="all"></rect> <rect id="selectorGrip_resize_e" fill="#2c9ff8" width="12" height="12" style="cursor:e-resize" stroke="#222" pointer-events="all"></rect> <rect id="selectorGrip_resize_se" fill="#2c9ff8" width="12" height="12" style="cursor:se-resize" stroke="#222" pointer-events="all"></rect> <rect id="selectorGrip_resize_s" fill="#2c9ff8" width="12" height="12" style="cursor:s-resize" stroke="#222" pointer-events="all"></rect> <rect id="selectorGrip_resize_sw" fill="#2c9ff8" width="12" height="12" style="cursor:sw-resize" stroke="#222" pointer-events="all"></rect> <rect id="selectorGrip_resize_w" fill="#2c9ff8" width="12" height="12" style="cursor:w-resize" stroke="#222" pointer-events="all"></rect> <line id="selectorGrip_rotateconnector" stroke="#000"></line> <circle id="selectorGrip_rotate" fill="#2c9ff8" r="10" stroke="#222" stroke-width="2" style="cursor:url(/js/all/editor/images/rotate.png) 12 12, auto;"></circle> </g> <rect id="selectorRubberBand" fill="#22C" fill-opacity="0.15" stroke="#22C" stroke-width="0.5" display="none" style="pointer-events:none" x="619.0784054331419" y="89.5500000724083" width="0" height="0"></rect> </g> <svg id="canvasBleed" width="556.1568" height="556.1568" x="117.42160000000001" y="18.45" overflow="none" style="display:none"> <rect id="backrect" width="100%" height="100%" x="0" y="0" stroke-dasharray="10 8" stroke="#ff0000" fill="none" stroke-width="2" style="pointer-events:none"></rect> <rect id="textrect" width="40px" height="8px" x="0" y="0" stroke="#ff0000" fill="#ff0000" style="pointer-events:none"></rect> <text id="bleedText" x="1" y="6" font-size="8px" font-family="Arial" fill="#ffffff" style="pointer-events:none">cut margin</text> </svg> </svg>'

var canvas = new fabric.Canvas('canvas');
fabric.loadSVGFromString(string, function(objects, options) {
  var obj = fabric.util.groupSVGElements(objects, options);
  canvas.add(obj);
});

var canvas2 = new fabric.Canvas('canvas2');
var image = new fabric.Image(document.getElementById('plainimage'));
canvas2.add(image);

<script src="//cdnjs.cloudflare.com/ajax/libs/fabric.js/1.7.16/fabric.min.js" ></script>

<img id="plainimage" src="//staging.chiplab.com/test/1.svg" />

As SVG
<canvas id="canvas" width="600" height="600"></canvas>
As an image
<canvas id="canvas2" width="600" height="600"></canvas>

svg到canvas转换的坐标不正确

1 个答案: