How to draw svg on top of canvas?
How to draw svg on top of canvas?
1 answer
by
hal.littel ,
4 months ago
@cortez.connelly
To draw an SVG on top of a canvas, you can follow these steps:
- Create a Canvas element: First, create a Canvas element using HTML.
1
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<canvas id="myCanvas" width="200" height="100"></canvas> |
- Create an SVG element: Next, create an SVG element using HTML and define the SVG graphic that you want to draw.
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<svg width="200" height="100" xmlns="http://www.w3.org/2000/svg"> <rect x="10" y="10" width="50" height="50" fill="red" /> </svg> |
- Get the canvas and SVG elements in JavaScript: Use JavaScript to get the canvas and SVG elements by their IDs.
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var canvas = document.getElementById('myCanvas');
var ctx = canvas.getContext('2d');
var svg = document.querySelector('svg');
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- Convert SVG to a data URI: Convert the SVG element to a data URI using XMLSerializer.
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var serializer = new XMLSerializer();
var svgString = serializer.serializeToString(svg);
var DOMURL = window.URL || window.webkitURL || window;
var svgBlob = new Blob([svgString], { type: 'image/svg+xml' });
var url = DOMURL.createObjectURL(svgBlob);
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- Draw the SVG on the canvas: Use the drawImage method of the CanvasRenderingContext2D object to draw the SVG on the canvas.
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var img = new Image();
img.onload = function() {
ctx.drawImage(img, 0, 0);
DOMURL.revokeObjectURL(url);
}
img.src = url;
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- Make sure the CORS policy is set correctly if the SVG image is hosted on a different domain.
With these steps, you can draw an SVG on top of a canvas.