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canvas: Add initial support of ImageBitmapRenderingContext (#37998)

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Add support of the ImageBitmapRenderingContext as "bitmaprenderer"
canvas context mode to RenderingContext/OffscreenRenderingContext
https://html.spec.whatwg.org/multipage/#imagebitmaprenderingcontext

It is initial implementation with public interface API but without
any display presentation support for HTMLCanvasElement.

Testing: Improvements in the following tests:
-
html/canvas/element/manual/imagebitmap/createImageBitmap-origin.sub.html
- html/canvas/offscreen/manual/text/canvas.2d.offscreen*
-
html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer.to.imagebitmap.nocrash.html
- imagebitmap-renderingcontext/*

Signed-off-by: Andrei Volykhin <andrei.volykhin@gmail.com>
This commit is contained in:
Andrei Volykhin 2025-07-15 11:03:49 +03:00 • committed by GitHub
parent ccc902eb7a
commit c817d7b9ce
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20 changed files with 365 additions and 82 deletions
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1
components/script_bindings/webidls/HTMLCanvasElement.webidl
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@ -4,6 +4,7 @@
// https://html.spec.whatwg.org/multipage/#htmlcanvaselement
typedef (CanvasRenderingContext2D
or ImageBitmapRenderingContext
or WebGLRenderingContext
or WebGL2RenderingContext
or GPUCanvasContext) RenderingContext;

14
components/script_bindings/webidls/ImageBitmapRenderingContext.webidl Normal file
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@ -0,0 +1,14 @@
/* 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 https://mozilla.org/MPL/2.0/. */
/// <https://html.spec.whatwg.org/multipage/#imagebitmaprenderingcontext>
[Exposed=(Window,Worker)]
interface ImageBitmapRenderingContext {
readonly attribute (HTMLCanvasElement or OffscreenCanvas) canvas;
[Throws] undefined transferFromImageBitmap(ImageBitmap? bitmap);
};
dictionary ImageBitmapRenderingContextSettings {
boolean alpha = true;
};

8
components/script_bindings/webidls/OffscreenCanvas.webidl
View file

@ -3,15 +3,17 @@
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
// https://html.spec.whatwg.org/multipage/#the-offscreencanvas-interface
typedef (OffscreenCanvasRenderingContext2D or WebGLRenderingContext or WebGL2RenderingContext)
OffscreenRenderingContext;
typedef (OffscreenCanvasRenderingContext2D
or ImageBitmapRenderingContext
or WebGLRenderingContext
or WebGL2RenderingContext) OffscreenRenderingContext;
dictionary ImageEncodeOptions {
DOMString type = "image/png";
unrestricted double quality;
};
//enum OffscreenRenderingContextId { "2d", "webgl", "webgl2" };
//enum OffscreenRenderingContextId { "2d", "bitmaprenderer", "webgl", "webgl2" };
[Exposed=(Window,Worker), Transferable, Pref="dom_offscreen_canvas_enabled"]
interface OffscreenCanvas : EventTarget {