Class “ImageBitmap”
Represents an in-memory Image. Unlike ImageData it is immutable, but can be created from a number of sources via createImageBitmap.
| Type: | ImageBitmap extends Object |
| Constructor: | private |
| Singleton: | No |
| Namespace: | tabris |
| Direct subclasses: | None |
| JSX Support: | No |
Methods
close()
Disposes the resources associated with this ImageBitmap. Should be called once the image is no longer needed to free up memory.
Returns: undefined
Static Methods
createImageBitmap(imageSource, options?)
Creates a promise that resolves to a new instance of ImageBitmap. Also available in global scope.
| Parameter | Type | Description |
|---|---|---|
| imageSource | Blob |
The data source to create an ImageBitmap instance from. |
| options | { |
Options for resizing the image. Optional. |
Returns: Promise<ImageBitmap>
createImageBitmap(imageSource, sx, sy, sw, sh, options?)
Creates a promise that resolves to a new instance of ImageBitmap. Also available in global scope.
| Parameter | Type | Description |
|---|---|---|
| imageSource | Blob |
The data source to create an ImageBitmap instance from. |
| sx | number |
The x coordinate of the reference point of the rectangle from which the ImageBitmap will be extracted. |
| sy | number |
The y coordinate of the reference point of the rectangle from which the ImageBitmap will be extracted. |
| sw | number |
The width of the rectangle from which the ImageBitmap will be extracted. |
| sh | number |
The height of the rectangle from which the ImageBitmap will be extracted. |
| options | { |
Options for resizing the image. Optional. |
Returns: Promise<ImageBitmap>
Properties
height
Native image height in pixel
| Type: | number |
| Settable: | No |
width
Native image width in pixel
| Type: | number |
| Settable: | No |
