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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/* -*- 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/.
*
* The origin of this IDL file is
* http://www.whatwg.org/specs/web-apps/current-work/#the-canvas-element
* © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
* Opera Software ASA. You are granted a license to use, reproduce
* and create derivative works of this document.
*/
interface nsISupports;
interface Variant;
[Exposed=Window]
interface HTMLCanvasElement : HTMLElement {
[HTMLConstructor] constructor();
[CEReactions, Pure, SetterThrows]
attribute unsigned long width;
[CEReactions, Pure, SetterThrows]
attribute unsigned long height;
[Throws]
nsISupports? getContext(DOMString contextId, optional any contextOptions = null);
[Throws, NeedsSubjectPrincipal]
DOMString toDataURL(optional DOMString type = "",
optional any encoderOptions);
[Throws, NeedsSubjectPrincipal]
void toBlob(BlobCallback callback,
optional DOMString type = "",
optional any encoderOptions);
};
// Mozilla specific bits
partial interface HTMLCanvasElement {
[Pure, SetterThrows]
attribute boolean mozOpaque;
[Throws, NeedsSubjectPrincipal, Pref="canvas.mozgetasfile.enabled"]
File mozGetAsFile(DOMString name, optional DOMString? type = null);
// A Mozilla-only extension to get a canvas context backed by double-buffered
// shared memory. Only privileged callers can call this.
[ChromeOnly, Throws]
nsISupports? MozGetIPCContext(DOMString contextId);
attribute PrintCallback? mozPrintCallback;
[Throws, Pref="canvas.capturestream.enabled", NeedsSubjectPrincipal]
CanvasCaptureMediaStream captureStream(optional double frameRate);
};
// For OffscreenCanvas
// Reference: https://wiki.whatwg.org/wiki/OffscreenCanvas
partial interface HTMLCanvasElement {
[Pref="gfx.offscreencanvas.enabled", Throws]
OffscreenCanvas transferControlToOffscreen();
};
[ChromeOnly,
Exposed=Window]
interface MozCanvasPrintState
{
// A canvas rendering context.
readonly attribute nsISupports context;
// To be called when rendering to the context is done.
void done();
};
callback PrintCallback = void(MozCanvasPrintState ctx);
callback BlobCallback = void(Blob? blob);
|
