akasha

Class OffscreenCanvas

java.lang.Object

akasha.core.JsObject

akasha.EventTarget

akasha.OffscreenCanvas

All Implemented Interfaces:

CanvasImageSource, TexImageSource, ImageBitmapSource, Transferable

@Generated(value="org.realityforge.webtack")
 @JsType(isNative=true,
        namespace="<global>",
        name="OffscreenCanvas")
public class OffscreenCanvas
extends EventTarget
implements TexImageSource, CanvasImageSource, Transferable

The OffscreenCanvas interface provides a canvas that can be rendered off screen. It is available in both the window and worker contexts.

See Also:

OffscreenCanvas - MDN, (HTML) # the-offscreencanvas-interface

Field Summary

Fields

Modifier and Type	Field and Description
int	height The height property returns and sets the height of an OffscreenCanvas object.
int	width The width property returns and sets the width of an OffscreenCanvas object.

Constructor Summary

Constructors

Constructor and Description
OffscreenCanvas(int width, int height) The OffscreenCanvas() constructor returns a newly instantiated OffscreenCanvas object.

Method Summary

Modifier and Type	Method and Description
Promise<Blob>	convertToBlob() The OffscreenCanvas.convertToBlob()method creates a Blob object representing the image contained in the canvas.
Promise<Blob>	convertToBlob(ImageEncodeOptions options) The OffscreenCanvas.convertToBlob()method creates a Blob object representing the image contained in the canvas.
OffscreenRenderingContext	getContext(java.lang.String contextId) The OffscreenCanvas.getContext() method returns a drawing context for an offscreen canvas, or null if the context identifier is not supported.
OffscreenRenderingContext	getContext(java.lang.String contextId, java.lang.Object options) The OffscreenCanvas.getContext() method returns a drawing context for an offscreen canvas, or null if the context identifier is not supported.
ImageBitmap	transferToImageBitmap() The OffscreenCanvas.transferToImageBitmap() method creates an ImageBitmap object from the most recently rendered image of the OffscreenCanvas.

Methods inherited from class akasha.EventTarget

addEventListener, addEventListener, addEventListener, dispatchEvent, removeEventListener, removeEventListener, removeEventListener

Methods inherited from class akasha.core.JsObject

assign, create, create, defineProperties, defineProperty, defineProperty, entries, freeze, fromEntries, getOwnPropertyDescriptor, getOwnPropertyDescriptor, getOwnPropertyDescriptors, getOwnPropertyNames, getOwnPropertySymbols, getPrototypeOf, hasOwnProperty, hasOwnProperty, is, isExtensible, isFrozen, isPrototypeOf, isSealed, keys, preventExtensions, propertyIsEnumerable, seal, setPrototypeOf, toString_, valueOf_, values

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

height

public int height

The height property returns and sets the height of an OffscreenCanvas object.

See Also:

OffscreenCanvas.height - MDN, OffscreenCanvas.height - HTML Living Standard

width

public int width

The width property returns and sets the width of an OffscreenCanvas object.

See Also:

OffscreenCanvas.width - MDN, OffscreenCanvas.width - HTML Living Standard

Constructor Detail

OffscreenCanvas

public OffscreenCanvas(int width,
                       int height)

The OffscreenCanvas() constructor returns a newly instantiated OffscreenCanvas object.

See Also:

OffscreenCanvas.OffscreenCanvas - MDN, OffscreenCanvas() - HTML Living Standard

Method Detail

convertToBlob

@Nonnull
public Promise<Blob> convertToBlob(@Nonnull
                                            ImageEncodeOptions options)

The OffscreenCanvas.convertToBlob()method creates a Blob object representing the image contained in the canvas.

See Also:

OffscreenCanvas.convertToBlob - MDN

convertToBlob

@Nonnull
public Promise<Blob> convertToBlob()

The OffscreenCanvas.convertToBlob()method creates a Blob object representing the image contained in the canvas.

See Also:

OffscreenCanvas.convertToBlob - MDN

getContext

@Nullable
public OffscreenRenderingContext getContext(@OffscreenRenderingContextId @Nonnull
                                                      java.lang.String contextId,
                                                      @Nullable
                                                      java.lang.Object options)

The OffscreenCanvas.getContext() method returns a drawing context for an offscreen canvas, or null if the context identifier is not supported.

See Also:

OffscreenCanvas.getContext - MDN, OffscreenCanvas.getContext() - HTML Living Standard

getContext

@Nullable
public OffscreenRenderingContext getContext(@OffscreenRenderingContextId @Nonnull
                                                      java.lang.String contextId)

The OffscreenCanvas.getContext() method returns a drawing context for an offscreen canvas, or null if the context identifier is not supported.

See Also:

OffscreenCanvas.getContext - MDN, OffscreenCanvas.getContext() - HTML Living Standard

transferToImageBitmap

@Nonnull
public ImageBitmap transferToImageBitmap()

The OffscreenCanvas.transferToImageBitmap() method creates an ImageBitmap object from the most recently rendered image of the OffscreenCanvas.

See Also:

OffscreenCanvas.transferToImageBitmap - MDN, OffscreenCanvas.transferToImageBitmap() - HTML Living Standard