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CanvasRenderingContext2D.currentTransform

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The CanvasRenderingContext2D.currentTransform property of the Canvas 2D API returns or sets an SVGMatrix object for the current transformation matrix.

Syntax

ctx.currentTransform [= value];
value
An SVGMatrix object to use as the current transformation matrix.

Examples

Using the currentTransform method

This is just a simple code snippet that uses the currentTransform property to set a transformation matrix.

HTML

<canvas id="canvas"></canvas>

JavaScript

var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");

var matrix = ctx.currentTransform;
matrix.a = 1;
matrix.b = 1;
matrix.c = 0;
matrix.d = 1;
matrix.e = 0;
matrix.f = 0;
ctx.currentTransform = matrix;
ctx.fillRect(0,0,100,100);

Edit the code below and see your changes update live in the canvas (make sure to use a browser that supports this feature — see the compatibility table):

Specifications

Specification Status Comment
WHATWG HTML Living Standard
The definition of 'CanvasRenderingContext2D.currentTransform' in that specification.
Living Standard  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) [1] Not supported [2] Not supported Not supported Not supported
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support Not supported Not supported Not supported Not supported Not supported Not supported

[1] This feature is deactivated by default. Enable the ExperimentalCanvasFeatures flag to test it.

[2] See bug 928150. Gecko also supports the experimental and prefixed properties mozCurrentTransform and mozCurrentTransformInverse which set or get the current (inverse) transformation matrix.

See also

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills, daltomania
 Last updated by: fscholz,