The CanvasRenderingContext2D.resetTransform()
method of the Canvas 2D API resets the current transform to the identity matrix.
The CanvasRenderingContext2D.resetTransform()
method of the Canvas 2D API resets the current transform to the identity matrix.
js
resetTransform()
This example draws a rotated rectangle after modifying the matrix, and then resets the matrix using the resetTransform()
method.
html
<canvas id="canvas"></canvas>
The rotate()
method rotates the transformation matrix by 45°. The fillRect()
method draws a filled rectangle, adjusted according to that matrix.
js
const canvas = document.getElementById("canvas"); const ctx = canvas.getContext("2d"); // Draw a rotated rectangle ctx.rotate((45 * Math.PI) / 180); ctx.fillRect(60, 0, 100, 30); // Reset transformation matrix to the identity matrix ctx.resetTransform();
Whenever you're done drawing transformed shapes, you should call resetTransform()
before rendering anything else. In this example, the first two shapes are drawn with a skew transformation, and the last two are drawn with the identity (regular) transformation.
html
<canvas id="canvas"></canvas>
js
const canvas = document.getElementById("canvas"); const ctx = canvas.getContext("2d"); // Skewed rectangles ctx.transform(1, 0, 1.7, 1, 0, 0); ctx.fillStyle = "gray"; ctx.fillRect(40, 40, 50, 20); ctx.fillRect(40, 90, 50, 20); // Non-skewed rectangles ctx.resetTransform(); ctx.fillStyle = "red"; ctx.fillRect(40, 40, 50, 20); ctx.fillRect(40, 90, 50, 20);
The skewed rectangles are gray, and the non-skewed rectangles are red.
You can also use the setTransform()
method to reset the current transform to the identity matrix, like so:
js
ctx.setTransform(1, 0, 0, 1, 0, 0);
Specification |
---|
HTML Standard # dom-context-2d-resettransform-dev |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
resetTransform |
31 | 79 | 36 | No | 18 | 10.1 | 4.4.3 | 31 | 36 | 18 | 10.3 | 2.0 |
CanvasRenderingContext2D
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https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/resetTransform