This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The CanvasPattern
.setTransform()
method uses an SVGMatrix
object as the pattern's transformation matrix and invokes it on the pattern.
Syntax
void pattern.setTransform(matrix);
Parameters
matrix
- An
SVGMatrix
to use as the pattern's transformation matrix.
Examples
Using the setTransform
method
This is just a simple code snippet which uses the setTransform
method to create a CanvasPattern
with the specified pattern transformation from an SVGMatrix
. The pattern gets applied if you set it as the current fillStyle
and gets drawn onto the canvas when using the fillRect()
method, for example.
HTML
<canvas id="canvas"></canvas> <svg id="svg1"></svg>
JavaScript
var canvas = document.getElementById('canvas'); var ctx = canvas.getContext('2d'); var svg1 = document.getElementById('svg1'); var matrix = svg1.createSVGMatrix(); var img = new Image(); img.src = 'https://mdn.mozillademos.org/files/222/Canvas_createpattern.png'; img.onload = function() { var pattern = ctx.createPattern(img, 'repeat'); pattern.setTransform(matrix.rotate(-45).scale(1.5)); ctx.fillStyle = pattern; ctx.fillRect(0, 0, 400, 400); };
Edit the code below and see your changes update live in the canvas:
Playable code
<canvas id="canvas" width="400" height="200" class="playable-canvas"></canvas> <svg id="svg1" style="display:none"></svg> <div class="playable-buttons"> <input id="edit" type="button" value="Edit" /> <input id="reset" type="button" value="Reset" /> </div> <textarea id="code" class="playable-code" style="height:120px"> var img = new Image(); img.src = 'https://mdn.mozillademos.org/files/222/Canvas_createpattern.png'; img.onload = function() { var pattern = ctx.createPattern(img, 'repeat'); pattern.setTransform(matrix.rotate(-45).scale(1.5)); ctx.fillStyle = pattern; ctx.fillRect(0, 0, 400, 400); };</textarea>
var canvas = document.getElementById('canvas'); var ctx = canvas.getContext('2d'); var textarea = document.getElementById('code'); var reset = document.getElementById('reset'); var edit = document.getElementById('edit'); var code = textarea.value; var svg1 = document.getElementById('svg1'); var matrix = svg1.createSVGMatrix(); function drawCanvas() { ctx.clearRect(0, 0, canvas.width, canvas.height); eval(textarea.value); } reset.addEventListener('click', function() { textarea.value = code; drawCanvas(); }); edit.addEventListener('click', function() { textarea.focus(); }) textarea.addEventListener('input', drawCanvas); window.addEventListener('load', drawCanvas);
Specifications
Specification | Status | Comment |
---|---|---|
HTML Living Standard The definition of 'CanvasPattern.setTransform' in that specification. |
Living Standard | Ā |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
setTransform | Chrome Full support 68 | Edge No support No | Firefox Full support 33 | IE No support No | Opera Full support 9 | Safari Full support 3.1 | WebView Android Full support 68 | Chrome Android Full support 68 | Firefox Android Full support 33 | Opera Android Full support 10.1 | Safari iOS Full support 11 | Samsung Internet Android No support No |
Legend
- Full support Ā
- Full support
- No support Ā
- No support
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- Non-standard. Expect poor cross-browser support.
- Non-standard. Expect poor cross-browser support.
See also
- The interface defining this method:
CanvasPattern
SVGMatrix