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2025-06-12 7b72ac13a83764a662159d4a49b7fffb90476ecb

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/* eslint-disable */
 
// explicit copy of @types/offscreencanvas to enable typedef bundling
 
// Type definitions for non-npm package offscreencanvas-browser 2019.6
// Project: https://html.spec.whatwg.org/multipage/canvas.html#the-offscreencanvas-interface
// Definitions by: Klaus Reimer <https://github.com/kayahr>
//                        Oleg Varaksin <https://github.com/ova2>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 4.3
 
// https://html.spec.whatwg.org/multipage/canvas.html#dom-canvas-transfercontroltooffscreen
export interface HTMLCanvasElement {
  transferControlToOffscreen(): OffscreenCanvas;
}
 
// https://html.spec.whatwg.org/multipage/canvas.html#offscreencanvasrenderingcontext2d
export interface OffscreenCanvasRenderingContext2D extends CanvasState, CanvasTransform, CanvasCompositing,
  CanvasImageSmoothing, CanvasFillStrokeStyles, CanvasShadowStyles, CanvasFilters, CanvasRect, CanvasDrawPath,
  CanvasText, CanvasDrawImage, CanvasImageData, CanvasPathDrawingStyles, CanvasTextDrawingStyles, CanvasPath {
  readonly canvas: OffscreenCanvas;
}
 
declare var OffscreenCanvasRenderingContext2D: {
  prototype: OffscreenCanvasRenderingContext2D;
  new(): OffscreenCanvasRenderingContext2D;
};
 
// https://html.spec.whatwg.org/multipage/canvas.html#the-offscreencanvas-interface
// Possible contextId values are defined by the enum OffscreenRenderingContextId { "2d", "bitmaprenderer", "webgl", "webgl2" }
// See also description: https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas/getContext
export interface OffscreenCanvas extends EventTarget {
  width: number;
  height: number;
 
  getContext(contextId: "2d", contextAttributes?: CanvasRenderingContext2DSettings): OffscreenCanvasRenderingContext2D | null;
 
  getContext(contextId: "bitmaprenderer", contextAttributes?: WebGLContextAttributes): ImageBitmapRenderingContext | null;
 
  getContext(contextId: "webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
 
  getContext(contextId: "webgl2", contextAttributes?: WebGLContextAttributes): WebGL2RenderingContext | null;
 
  convertToBlob(options?: { type?: string | undefined, quality?: number | undefined }): Promise<Blob>;
 
  transferToImageBitmap(): ImageBitmap;
}
 
// https://html.spec.whatwg.org/multipage/canvas.html#canvasdrawimage
export interface CanvasDrawImage {
  drawImage(image: CanvasImageSource | OffscreenCanvas, dx: number, dy: number): void;
 
  drawImage(image: CanvasImageSource | OffscreenCanvas, dx: number, dy: number, dw: number, dh: number): void;
 
  drawImage(image: CanvasImageSource | OffscreenCanvas, sx: number, sy: number, sw: number, sh: number,
            dx: number, dy: number, dw: number, dh: number): void;
}
 
// https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#dom-createimagebitmap
declare function createImageBitmap(image: ImageBitmapSource | OffscreenCanvas): Promise<ImageBitmap>;
declare function createImageBitmap(image: ImageBitmapSource | OffscreenCanvas, sx: number, sy: number,
                                 sw: number, sh: number): Promise<ImageBitmap>;
 
// OffscreenCanvas should be a part of Transferable => extend all postMessage methods
export interface Worker {
  postMessage(message: any, transfer?: Array<Transferable | OffscreenCanvas>): void;
}
 
export interface ServiceWorker {
  postMessage(message: any, transfer?: Array<Transferable | OffscreenCanvas>): void;
}
 
export interface MessagePort {
  postMessage(message: any, transfer?: Array<Transferable | OffscreenCanvas>): void;
}
 
export interface Window {
  postMessage(message: any, targetOrigin: string, transfer?: Array<Transferable | OffscreenCanvas>): void;
}
 
declare function postMessage(message: any, targetOrigin: string, transfer?: Array<Transferable | OffscreenCanvas>): void;
 
declare var OffscreenCanvas: {
  prototype: OffscreenCanvas;
  new(width: number, height: number): OffscreenCanvas;
};