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Implement HTMLCanvasElement.toBlob (#34938)

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This refactors some of the code that is shared with toDataURL, and
updates the webidl definition to match the current spec (using a default
value for the mime type).

Signed-off-by: webbeef <me@webbeef.org>
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webbeef 2025-01-10 11:04:42 -08:00 • committed by GitHub
parent 9aaa6934b7
commit 44d1e2ae0d
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13 changed files with 206 additions and 130 deletions
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8
components/script/dom/webidls/HTMLCanvasElement.webidl
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@ -18,8 +18,10 @@ interface HTMLCanvasElement : HTMLElement {
RenderingContext? getContext(DOMString contextId, optional any options = null);
[Throws]
USVString toDataURL(optional DOMString type, optional any quality);
//void toBlob(BlobCallback _callback, optional DOMString type, optional any quality);
USVString toDataURL(optional DOMString type = "image/png", optional any quality);
[Throws]
undefined toBlob(BlobCallback callback, optional DOMString type = "image/png", optional any quality);
//OffscreenCanvas transferControlToOffscreen();
};
@ -28,4 +30,4 @@ partial interface HTMLCanvasElement {
MediaStream captureStream (optional double frameRequestRate);
};
//callback BlobCallback = void (Blob? blob);
callback BlobCallback = undefined(Blob? blob);