尝试将 SVG 绘制到 canvas，为什么我的 SVG XML 被截断了？
Trying to draw SVG to canvas, why is my SVG XML getting truncated?
我真正想做的就是将我喜欢的动态创建的 SVG 放入 PDF 中，目前通过 jsPDF。 addSVG 不起作用，所以我尝试将它们转换为 PNG 以尝试使用 addImage。
这是在 IE11 中（客户端要求）。
如果我这样做：
var lsvg = d3.select("#nowhere2").node().parentNode.innerHTML;
console.log(lsvg);
也许三分之一的 SVG 显示在控制台中。更奇怪的是，它会在事物的中间截断，因此没有结束标记或其他任何内容：
<div id="nowhere2"><svg xmlns="http://www.w3.org/2000/svg" width="50px" height="800px"><defs><pattern id="oaghm" patternUnits="userSpaceOnUse" width="30" height="30"><path stroke="#343434" stroke-linecap="square" stroke-width="80" d="M 0 30 l 30 -30 M -7.5 7.5 l 15 -15 M 22.5 37.5 l 15 -15" shape-rendering="auto" /></pattern></defs><rect style="fill: url(#oaghm);" stroke="black" x="10" y="20" width="10" height="10" /><defs><pattern id="zpdff" patternUnits="userSpaceOnUse" width="4" height="4"><path stroke="#343434" stroke-linecap="square" stroke-width="1" d="M 0 4 l 4 -4 M -1 1 l 2 -2 M 3 5 l 2 -2" shape-rendering="auto" /></pattern></defs><rect style="fill: url(#zpdff);" stroke="black" x="10" y="40" width="10" height="10" /><defs><pattern id="dyxwi" patternUnits="userSpaceOnUse" width="10" height="10"><path stroke="#343434" stroke-linecap="square" stroke-width="2" d="M 0 10 l 10 -10 M -2.5 2.5 l 5 -5 M 7.5 12.5 l 5 -5" shape-rendering="auto" /><path stroke="#343434" stroke-linecap="square" stroke-width="2" d
当然，这意味着我的DataURI坏了，尽管Chrome勇敢地尝试（仅用于测试，必须使用IE11）：
data:image/svg+xml;base64,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
更奇怪的是，如果我简单地将 lsvg 对象追加回页面，它呈现得很好。
var lsvg = d3.select("#nowhere2").node().parentNode.innerHTML;
$("#nowhere").append(lsvg);
如果我在附加后尝试在控制台中检查它，我会得到相同的截断字符串。当然，这让我相信这是一个 timing/asynch 问题，但我已经尝试了所有我能想到的方法来解决这个问题，包括将 draw-to-canvas-then- save-to-png 函数作为我初始 SVG 绘制函数的回调。我每次都得到相同的奇怪截断字符串。
这是我的 canvas（由于其他问题在 html 中声明）：
<canvas id="lcanvas" width="50" height="800"></canvas>
研究让我相信这可能是 canvas/SVG 大小不匹配，但情况似乎并非如此（我从 SVG 中得到的一点点显示相同 width/height，见上文).此外，如果这是真的，它甚至会在 canvas 涉及之前截断初始字符串分配，这似乎很奇怪。
我获得了一个完整的 DataURI 的辉煌时刻：
data:image/svg+xml;base64,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
所以我明确地使用该 DataURI 对其进行了测试，换句话说，不用担心绘图是否已经完成。我做到了：
limg.src = "data:image/svg+xml;base64,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";
console.log(limg.src);
在控制台中也是一样。爆炸了。截断。细绳。这是我的代码：
var lsvg = d3.select("#nowhere2").node().parentNode.innerHTML;
console.log(lsvg);
var limg = new Image;
var lcontext = canl.getContext('2d');
limg.src = 'data:image/svg+xml;base64,' + btoa(lsvg);
console.log(limg.src);
lcontext.load = limg.addEventListener("load", function () {
//console.log(limg.src);
//This fun bit of code brought to you courtesy of IE11.
try {
lcontext.drawImage(limg, 0, 0);
}
catch (err) {
setTimeout(lcontext.drawImage(limg, 0, 0), 0);
};
console.log(canl.toDataURL('image/png'));
});
我让 canvas 可见，这样我就可以看到可能会发生什么样的恶作剧。它会很好地从文件中绘制图像。另外，从技术上讲，我在这里得到了一张图片，它只是空白的。
我不想从文件中提取，因为这会污染 canvas 并且我在 canl.toDataURL.
上收到安全错误
我尝试了各种获取 lsvg 位的方法，XML序列化等；我得到的只是稍微短一点的头部（没有 div 元素）和稍微长一点的尾部，然后在似乎完全相同的字符数之后被截断。像往常一样，就在事情的中间，所以仍然没有结束标签，只是中途突然结束。
需要说明的是，这不是裁剪后的 SVG。这是一个 'clipped' SVG。开始标签，没有结束标签，损坏的图像，除非你是 Chrome 并且你无论如何都尝试渲染它（IE 甚至不会打扰）。在涉及 canvas 之前，SVG 已被破坏，甚至在显式分配后独立于绘图功能。
哦，甜蜜的正义，我有一个fiddle！ https://jsfiddle.net/94xhyv6t/ 在 Chrome 和 IE 中尝试并查看控制台。在 Chrome 中，如果您单击 link，您将获得一个 XML 页面，但您可以在那里看到所有 SVG 元素，在 IE 中它被截断了。
很高兴知道我没有完全疯掉。
只是因为我知道有人会提到它，这是没有父 DIV 节点的一个：https://jsfiddle.net/94xhyv6t/1/ 同样的问题。
编辑：注意：此 fiddle 显示问题：https://jsfiddle.net/94xhyv6t/1/。在 Chrome 中加载它，一切正常。在 IE11 中加载它，一切都被截断了。我删除了所有其他代码，这个 fiddle 只显示了 SVG 字符串生成组件以及它是如何在 IE 中被截断的。我已经尝试 XMLSerializer per https://jsfiddle.net/94xhyv6t/4/ ，同样的问题。也许有解决方法？
目前的最后编辑：控制台只是截断显示，否则字符串很好。接受的答案有一个完整的 fiddle 示例，展示了如何将 SVG 放入 canvas，但是你不能在 IE11 中执行 canvas.toDataURL() 所以这不是一个合适的转换方法。我使用 canvg 作为解决方法。
不知道你的问题到底是什么，但是使用
var data = new XMLSerializer().serializeToString(document.querySelector('svg'));
img.src = 'data:image/svg+xml; charset=utf8, ' + encodeURIComponent(data);
适用于我的 FF 和 Chrome。
var n = 20, // number of layers
m = 200, // number of samples per layer
stack = d3.layout.stack().offset("wiggle"),
layers0 = stack(d3.range(n).map(function() { return bumpLayer(m); })),
layers1 = stack(d3.range(n).map(function() { return bumpLayer(m); }));
var width = 960,
height = 500;
var x = d3.scale.linear()
.domain([0, m - 1])
.range([0, width]);
var y = d3.scale.linear()
.domain([0, d3.max(layers0.concat(layers1), function(layer) { return d3.max(layer, function(d) { return d.y0 + d.y; }); })])
.range([height, 0]);
var color = d3.scale.linear()
.range(["#aad", "#556"]);
var area = d3.svg.area()
.x(function(d) { return x(d.x); })
.y0(function(d) { return y(d.y0); })
.y1(function(d) { return y(d.y0 + d.y); });
var svg = d3.select("#worm").append("svg")
.attr("width", width)
.attr("height", height);
svg.selectAll("path")
.data(layers0)
.enter().append("path")
.attr("d", area)
.style("fill", function() { return color(Math.random()); });
function transition() {
d3.selectAll("path")
.data(function() {
var d = layers1;
layers1 = layers0;
return layers0 = d;
})
.transition()
.duration(2500)
.attr("d", area);
}
// Inspired by Lee Byron's test data generator.
function bumpLayer(n) {
function bump(a) {
var x = 1 / (.1 + Math.random()),
y = 2 * Math.random() - .5,
z = 10 / (.1 + Math.random());
for (var i = 0; i < n; i++) {
var w = (i / n - y) * z;
a[i] += x * Math.exp(-w * w);
}
}
var a = [], i;
for (i = 0; i < n; ++i) a[i] = 0;
for (i = 0; i < 5; ++i) bump(a);
return a.map(function(d, i) { return {x: i, y: Math.max(0, d)}; });
}
var lsvg = d3.select("#worm").node().parentNode.innerHTML;
console.log(lsvg);
var img = new Image;
console.log(img.src);
document.body.appendChild(img);
img.onload = function(){
var canvas = document.createElement('canvas');
// IE seems to not set width and height for svg in img tag...
canvas.width = this.width||960;
canvas.height = this.height||500;
canvas.getContext('2d').drawImage(this, 0,0);
document.body.appendChild(canvas);
}
img.src = 'data:image/svg+xml; charset=utf8, ' + encodeURIComponent(new XMLSerializer().serializeToString(document.querySelector('svg')));
svg{border: 1px solid green}
img{border: 1px solid blue}
canvas{border: 1px solid red}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<div id="worm"></div>
请注意，我在 img 标签的 onload 事件中添加了 canvas 内容。
编辑：我发现 IE 没有设置 <img> 标签中加载的 svg 的宽度和高度属性，因此您必须对其进行硬编码或从 <svg> 中获取它元素
我真正想做的就是将我喜欢的动态创建的 SVG 放入 PDF 中，目前通过 jsPDF。 addSVG 不起作用，所以我尝试将它们转换为 PNG 以尝试使用 addImage。
这是在 IE11 中（客户端要求）。
如果我这样做：
var lsvg = d3.select("#nowhere2").node().parentNode.innerHTML;
console.log(lsvg);
也许三分之一的 SVG 显示在控制台中。更奇怪的是，它会在事物的中间截断，因此没有结束标记或其他任何内容：
<div id="nowhere2"><svg xmlns="http://www.w3.org/2000/svg" width="50px" height="800px"><defs><pattern id="oaghm" patternUnits="userSpaceOnUse" width="30" height="30"><path stroke="#343434" stroke-linecap="square" stroke-width="80" d="M 0 30 l 30 -30 M -7.5 7.5 l 15 -15 M 22.5 37.5 l 15 -15" shape-rendering="auto" /></pattern></defs><rect style="fill: url(#oaghm);" stroke="black" x="10" y="20" width="10" height="10" /><defs><pattern id="zpdff" patternUnits="userSpaceOnUse" width="4" height="4"><path stroke="#343434" stroke-linecap="square" stroke-width="1" d="M 0 4 l 4 -4 M -1 1 l 2 -2 M 3 5 l 2 -2" shape-rendering="auto" /></pattern></defs><rect style="fill: url(#zpdff);" stroke="black" x="10" y="40" width="10" height="10" /><defs><pattern id="dyxwi" patternUnits="userSpaceOnUse" width="10" height="10"><path stroke="#343434" stroke-linecap="square" stroke-width="2" d="M 0 10 l 10 -10 M -2.5 2.5 l 5 -5 M 7.5 12.5 l 5 -5" shape-rendering="auto" /><path stroke="#343434" stroke-linecap="square" stroke-width="2" d
当然，这意味着我的DataURI坏了，尽管Chrome勇敢地尝试（仅用于测试，必须使用IE11）：
data:image/svg+xml;base64,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
更奇怪的是，如果我简单地将 lsvg 对象追加回页面，它呈现得很好。
var lsvg = d3.select("#nowhere2").node().parentNode.innerHTML;
$("#nowhere").append(lsvg);
如果我在附加后尝试在控制台中检查它，我会得到相同的截断字符串。当然，这让我相信这是一个 timing/asynch 问题，但我已经尝试了所有我能想到的方法来解决这个问题，包括将 draw-to-canvas-then- save-to-png 函数作为我初始 SVG 绘制函数的回调。我每次都得到相同的奇怪截断字符串。
这是我的 canvas（由于其他问题在 html 中声明）：
<canvas id="lcanvas" width="50" height="800"></canvas>
研究让我相信这可能是 canvas/SVG 大小不匹配，但情况似乎并非如此（我从 SVG 中得到的一点点显示相同 width/height，见上文).此外，如果这是真的，它甚至会在 canvas 涉及之前截断初始字符串分配，这似乎很奇怪。
我获得了一个完整的 DataURI 的辉煌时刻：
data:image/svg+xml;base64,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
所以我明确地使用该 DataURI 对其进行了测试，换句话说，不用担心绘图是否已经完成。我做到了：
limg.src = "data:image/svg+xml;base64,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";
console.log(limg.src);
在控制台中也是一样。爆炸了。截断。细绳。这是我的代码：
var lsvg = d3.select("#nowhere2").node().parentNode.innerHTML;
console.log(lsvg);
var limg = new Image;
var lcontext = canl.getContext('2d');
limg.src = 'data:image/svg+xml;base64,' + btoa(lsvg);
console.log(limg.src);
lcontext.load = limg.addEventListener("load", function () {
//console.log(limg.src);
//This fun bit of code brought to you courtesy of IE11.
try {
lcontext.drawImage(limg, 0, 0);
}
catch (err) {
setTimeout(lcontext.drawImage(limg, 0, 0), 0);
};
console.log(canl.toDataURL('image/png'));
});
我让 canvas 可见，这样我就可以看到可能会发生什么样的恶作剧。它会很好地从文件中绘制图像。另外，从技术上讲，我在这里得到了一张图片，它只是空白的。
我不想从文件中提取，因为这会污染 canvas 并且我在 canl.toDataURL.
我尝试了各种获取 lsvg 位的方法，XML序列化等；我得到的只是稍微短一点的头部（没有 div 元素）和稍微长一点的尾部，然后在似乎完全相同的字符数之后被截断。像往常一样，就在事情的中间，所以仍然没有结束标签，只是中途突然结束。
需要说明的是，这不是裁剪后的 SVG。这是一个 'clipped' SVG。开始标签，没有结束标签，损坏的图像，除非你是 Chrome 并且你无论如何都尝试渲染它（IE 甚至不会打扰）。在涉及 canvas 之前，SVG 已被破坏，甚至在显式分配后独立于绘图功能。
哦，甜蜜的正义，我有一个fiddle！ https://jsfiddle.net/94xhyv6t/ 在 Chrome 和 IE 中尝试并查看控制台。在 Chrome 中，如果您单击 link，您将获得一个 XML 页面，但您可以在那里看到所有 SVG 元素，在 IE 中它被截断了。
很高兴知道我没有完全疯掉。
只是因为我知道有人会提到它，这是没有父 DIV 节点的一个：https://jsfiddle.net/94xhyv6t/1/ 同样的问题。
编辑：注意：此 fiddle 显示问题：https://jsfiddle.net/94xhyv6t/1/。在 Chrome 中加载它，一切正常。在 IE11 中加载它，一切都被截断了。我删除了所有其他代码，这个 fiddle 只显示了 SVG 字符串生成组件以及它是如何在 IE 中被截断的。我已经尝试 XMLSerializer per https://jsfiddle.net/94xhyv6t/4/ ，同样的问题。也许有解决方法？
目前的最后编辑：控制台只是截断显示，否则字符串很好。接受的答案有一个完整的 fiddle 示例，展示了如何将 SVG 放入 canvas，但是你不能在 IE11 中执行 canvas.toDataURL() 所以这不是一个合适的转换方法。我使用 canvg 作为解决方法。
不知道你的问题到底是什么，但是使用
var data = new XMLSerializer().serializeToString(document.querySelector('svg'));
img.src = 'data:image/svg+xml; charset=utf8, ' + encodeURIComponent(data);
适用于我的 FF 和 Chrome。
var n = 20, // number of layers
m = 200, // number of samples per layer
stack = d3.layout.stack().offset("wiggle"),
layers0 = stack(d3.range(n).map(function() { return bumpLayer(m); })),
layers1 = stack(d3.range(n).map(function() { return bumpLayer(m); }));
var width = 960,
height = 500;
var x = d3.scale.linear()
.domain([0, m - 1])
.range([0, width]);
var y = d3.scale.linear()
.domain([0, d3.max(layers0.concat(layers1), function(layer) { return d3.max(layer, function(d) { return d.y0 + d.y; }); })])
.range([height, 0]);
var color = d3.scale.linear()
.range(["#aad", "#556"]);
var area = d3.svg.area()
.x(function(d) { return x(d.x); })
.y0(function(d) { return y(d.y0); })
.y1(function(d) { return y(d.y0 + d.y); });
var svg = d3.select("#worm").append("svg")
.attr("width", width)
.attr("height", height);
svg.selectAll("path")
.data(layers0)
.enter().append("path")
.attr("d", area)
.style("fill", function() { return color(Math.random()); });
function transition() {
d3.selectAll("path")
.data(function() {
var d = layers1;
layers1 = layers0;
return layers0 = d;
})
.transition()
.duration(2500)
.attr("d", area);
}
// Inspired by Lee Byron's test data generator.
function bumpLayer(n) {
function bump(a) {
var x = 1 / (.1 + Math.random()),
y = 2 * Math.random() - .5,
z = 10 / (.1 + Math.random());
for (var i = 0; i < n; i++) {
var w = (i / n - y) * z;
a[i] += x * Math.exp(-w * w);
}
}
var a = [], i;
for (i = 0; i < n; ++i) a[i] = 0;
for (i = 0; i < 5; ++i) bump(a);
return a.map(function(d, i) { return {x: i, y: Math.max(0, d)}; });
}
var lsvg = d3.select("#worm").node().parentNode.innerHTML;
console.log(lsvg);
var img = new Image;
console.log(img.src);
document.body.appendChild(img);
img.onload = function(){
var canvas = document.createElement('canvas');
// IE seems to not set width and height for svg in img tag...
canvas.width = this.width||960;
canvas.height = this.height||500;
canvas.getContext('2d').drawImage(this, 0,0);
document.body.appendChild(canvas);
}
img.src = 'data:image/svg+xml; charset=utf8, ' + encodeURIComponent(new XMLSerializer().serializeToString(document.querySelector('svg')));
svg{border: 1px solid green}
img{border: 1px solid blue}
canvas{border: 1px solid red}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<div id="worm"></div>
请注意，我在 img 标签的 onload 事件中添加了 canvas 内容。
编辑：我发现 IE 没有设置 <img> 标签中加载的 svg 的宽度和高度属性，因此您必须对其进行硬编码或从 <svg> 中获取它元素