CanvasPattern.setTransform

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:

Specifications

Specification	Status	Comment
WHATWG HTML Living Standard The definition of 'CanvasPattern.setTransform' in that specification.	Living Standard

Browser compatibility

See also

• The interface defining it, CanvasPattern
• SVGMatrix