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4054f9a5a0
Follow the specification and make OffscreenCanvas objects are transferable, but not in case if there are a weak reference to placeholder canvas element. To handle it properly need to implement dedicated frame provider/dispatcher between canvas element (script thread) and offscreen canvas (dedicated worker thread). https://html.spec.whatwg.org/multipage/#the-offscreencanvas-interface:transferable-objects Testing: Improvements in the following tests - html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.detachedcanvas.html - html/canvas/offscreen/manual/convert-to-blob/offscreencanvas.convert.to.blob* - html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transfer* - html/infrastructure/safe-passing-of-structured-data/transfer-errors.window.js Part of #24276 Signed-off-by: Andrei Volykhin <andrei.volykhin@gmail.com>
25 lines
1.1 KiB
Text
25 lines
1.1 KiB
Text
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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// https://html.spec.whatwg.org/multipage/#the-offscreencanvas-interface
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typedef (OffscreenCanvasRenderingContext2D or WebGLRenderingContext or WebGL2RenderingContext)
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OffscreenRenderingContext;
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dictionary ImageEncodeOptions {
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DOMString type = "image/png";
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unrestricted double quality;
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};
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//enum OffscreenRenderingContextId { "2d", "webgl", "webgl2" };
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[Exposed=(Window,Worker), Transferable, Pref="dom_offscreen_canvas_enabled"]
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interface OffscreenCanvas : EventTarget {
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[Throws] constructor([EnforceRange] unsigned long long width, [EnforceRange] unsigned long long height);
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attribute [EnforceRange] unsigned long long width;
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attribute [EnforceRange] unsigned long long height;
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[Throws] OffscreenRenderingContext? getContext(DOMString contextId, optional any options = null);
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[Throws] ImageBitmap transferToImageBitmap();
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Promise<Blob> convertToBlob(optional ImageEncodeOptions options = {});
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};
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