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CanvasRenderingContext2D.currentTransform

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The CanvasRenderingContext2D.currentTransform property of the Canvas 2D API returns or sets a DOMMatrix (current specification) or SVGMatrix (old specification) object for the current transformation matrix.

Syntax

ctx.currentTransform [= value];

value: A DOMMatrix or SVGMatrix object to use as the current transformation matrix.

Examples

Manually changing the matrix

This example uses the currentTransform property to set a transformation matrix. A rectangle is then drawn using that transformation.

HTML

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

JavaScript

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');

let 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);

Result

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`currentTransform`	32-68	No	No See bug 928150. Firefox also supports the experimental and prefixed properties mozCurrentTransform and mozCurrentTransformInverse which set or get the current (inverse) transformation matrix.	No	19-55	No See webkitbug(174278).	No	32-68	No	19-48	No	No
`DOMMatrix_return_value`	No See bug 637940.	No See bug 637940.	No	No	No	No See bug 174278.	No See bug 637940.	No See bug 637940.	No	No	No	No See bug 637940.