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March 16, 2016 01:45
Embed Image Data in SVG Elements
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| <html xmlns="http://www.w3.org/1999/xhtml"> | |
| <head> | |
| <title>Embedding Image Data into Elements</title> | |
| <meta charset="utf-8" /> | |
| </head> | |
| <script src="http://d3js.org/d3.v3.min.js" type="text/javascript"></script> | |
| <body onload="embedsvg()"> | |
| </body> | |
| <footer> | |
| <script> | |
| function embedsvg() { | |
| var canvas = d3.select("body").append("canvas").attr("id","newCanvas").attr("width", "300px").attr("height", "276px").node(); | |
| var context = canvas.getContext('2d'); | |
| var imageObj = new Image(); | |
| imageObj.src = 'dataviz_venn.png'; | |
| imageObj.onload = function() { | |
| context.drawImage(imageObj, 0, 0); | |
| // var imageData = canvas.toDataURL("image/png"); | |
| var imageData = document.getElementById("newCanvas").toDataURL("image/png") | |
| //Add as HTML img element | |
| d3.select("body").append("img").datum(imageData).attr("src", function(d) {return d}) | |
| d3.select("body").append("svg").attr("height", "300px").attr("width", "276px") | |
| //Add as SVG image element | |
| d3.select("svg").append("image").datum(imageData).attr("height", 300).attr("width", 276).attr("xlink:href", function(d) {return d}) | |
| //Here's the data embedded in the img element __data__ property | |
| console.log(d3.select("img").node().__data__) | |
| //likewise, the data embedded in the svg:image element | |
| console.log(d3.select("image").node().__data__) | |
| }; | |
| } | |
| </script> | |
| </footer> | |
| </html> |
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