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The ImageData
interface represents the underlying pixel data of an area of a <canvas>
element. It is created using the ImageData()
constructor or creator methods on the CanvasRenderingContext2D
object associated with a canvas: createImageData()
and getImageData()
. It can also be used to set a part of the canvas by using putImageData()
.
Constructors
ImageData()
- Creates an
ImageData
object from a givenUint8ClampedArray
and the size of the image it contains. If no array is given, it creates an image of a black rectangle. Note that this is the most common way to create such an object in workers ascreateImageData()
is not available there.
Properties
ImageData.data
Read only- Is a
Uint8ClampedArray
representing a one-dimensional array containing the data in the RGBA order, with integer values between0
and255
(included). ImageData.height
Read only- Is an
unsigned
long
representing the actual height, in pixels, of theImageData
. ImageData.width
Read only- Is an
unsigned
long
representing the actual width, in pixels, of theImageData
.
Specifications
Specification | Status | Comment |
---|---|---|
WHATWG HTML Living Standard The definition of 'ImageData' in that specification. |
Living Standard |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 4.0 | 14 (14) | 9.0 | 9.0 | 3.1 |
Support in workers | (Yes) | 25 (25) | ? | ? | ? |
ImageData() constructor |
43 | 29 (29) | No support | 30 | ? |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|
Basic support | 2.1 | (Yes) | 14.0 (14) | ? | 10.0 | 3.2 | (Yes) |
Support in workers | ? | (Yes) | 25.0 (25) | ? | ? | ? | (Yes) |
ImageData() constructor |
? | (Yes) | 29.0 (29) | ? | ? | ? | (Yes) |
See also
CanvasRenderingContext2D
- The
<canvas>
element and its associated interface,HTMLCanvasElement
.