// FIXME: This should be in OffscreenCanvasBase.idl but then it is not exported
// https://html.spec.whatwg.org/multipage/canvas.html#imageencodeoptions
dictionary ImageEncodeOptions {
    DOMString type = "image/png";
    unrestricted double quality;
};

// FIXME: This should be in OffscreenCanvasBase.idl but then it is not exported
// https://html.spec.whatwg.org/multipage/canvas.html#offscreenrenderingcontextid
enum OffscreenRenderingContextId { "2d", "bitmaprenderer", "webgl", "webgl2", "webgpu" };


// https://html.spec.whatwg.org/multipage/canvas.html#offscreencanvas
[Exposed=(Window,Worker), Transferable, Experimental]
interface OffscreenCanvas : EventTarget {
    constructor([EnforceRange] unsigned long long width, [EnforceRange] unsigned long long height);

    [EnforceRange] attribute unsigned long long width;
    [EnforceRange] attribute unsigned long long height;

    OffscreenRenderingContext? getContext(OffscreenRenderingContextId contextId, optional any options = null);
    ImageBitmap transferToImageBitmap();
    Promise<Blob> convertToBlob(optional ImageEncodeOptions options = {});

    attribute EventHandler oncontextlost;
    attribute EventHandler oncontextrestored;
};
