1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* For more information on this interface, please see
* https://html.spec.whatwg.org/#the-offscreencanvas-interface
*/
typedef (OffscreenCanvasRenderingContext2D or ImageBitmapRenderingContext or WebGLRenderingContext or WebGL2RenderingContext or GPUCanvasContext) OffscreenRenderingContext;
dictionary ImageEncodeOptions {
DOMString type = "image/png";
unrestricted double quality;
};
enum OffscreenRenderingContextId { "2d", "bitmaprenderer", "webgl", "webgl2", "webgpu" };
[Exposed=(Window,Worker), Pref="gfx.offscreencanvas.enabled"]
interface OffscreenCanvas : EventTarget {
[Throws]
constructor([EnforceRange] unsigned long width, [EnforceRange] unsigned long height);
[Pure, SetterThrows]
attribute [EnforceRange] unsigned long width;
[Pure, SetterThrows]
attribute [EnforceRange] unsigned long height;
[Throws]
OffscreenRenderingContext? getContext(OffscreenRenderingContextId contextId,
optional any contextOptions = null);
[Throws]
ImageBitmap transferToImageBitmap();
[NewObject]
Promise<Blob> convertToBlob(optional ImageEncodeOptions options = {});
attribute EventHandler oncontextlost;
attribute EventHandler oncontextrestored;
// Deprecated by convertToBlob
[Deprecated="OffscreenCanvasToBlob", NewObject]
Promise<Blob> toBlob(optional DOMString type = "",
optional any encoderOptions);
};
|
