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    Interface OffscreenCanvasRenderingContext2D

    The OffscreenCanvasRenderingContext2D interface is a CanvasRenderingContext2D rendering context for drawing to the bitmap of an OffscreenCanvas object.

    MDN Reference

    interface OffscreenCanvasRenderingContext2D {
        canvas: OffscreenCanvas;
        direction: CanvasDirection;
        fillStyle: string | CanvasGradient | CanvasPattern;
        filter: string;
        font: string;
        fontKerning: CanvasFontKerning;
        fontStretch: CanvasFontStretch;
        fontVariantCaps: CanvasFontVariantCaps;
        globalAlpha: number;
        globalCompositeOperation: GlobalCompositeOperation;
        imageSmoothingEnabled: boolean;
        imageSmoothingQuality: ImageSmoothingQuality;
        letterSpacing: string;
        lineCap: CanvasLineCap;
        lineDashOffset: number;
        lineJoin: CanvasLineJoin;
        lineWidth: number;
        miterLimit: number;
        shadowBlur: number;
        shadowColor: string;
        shadowOffsetX: number;
        shadowOffsetY: number;
        strokeStyle: string | CanvasGradient | CanvasPattern;
        textAlign: CanvasTextAlign;
        textBaseline: CanvasTextBaseline;
        textRendering: CanvasTextRendering;
        wordSpacing: string;
        arc(
            x: number,
            y: number,
            radius: number,
            startAngle: number,
            endAngle: number,
            counterclockwise?: boolean,
        ): void;
        arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
        beginPath(): void;
        bezierCurveTo(
            cp1x: number,
            cp1y: number,
            cp2x: number,
            cp2y: number,
            x: number,
            y: number,
        ): void;
        clearRect(x: number, y: number, w: number, h: number): void;
        clip(fillRule?: CanvasFillRule): void;
        clip(path: Path2D, fillRule?: CanvasFillRule): void;
        closePath(): void;
        createConicGradient(
            startAngle: number,
            x: number,
            y: number,
        ): CanvasGradient;
        createImageData(
            sw: number,
            sh: number,
            settings?: ImageDataSettings,
        ): ImageData;
        createImageData(imageData: ImageData): ImageData;
        createLinearGradient(
            x0: number,
            y0: number,
            x1: number,
            y1: number,
        ): CanvasGradient;
        createPattern(
            image: CanvasImageSource,
            repetition: null | string,
        ): null | CanvasPattern;
        createRadialGradient(
            x0: number,
            y0: number,
            r0: number,
            x1: number,
            y1: number,
            r1: number,
        ): CanvasGradient;
        drawImage(image: CanvasImageSource, dx: number, dy: number): void;
        drawImage(
            image: CanvasImageSource,
            dx: number,
            dy: number,
            dw: number,
            dh: number,
        ): void;
        drawImage(
            image: CanvasImageSource,
            sx: number,
            sy: number,
            sw: number,
            sh: number,
            dx: number,
            dy: number,
            dw: number,
            dh: number,
        ): void;
        ellipse(
            x: number,
            y: number,
            radiusX: number,
            radiusY: number,
            rotation: number,
            startAngle: number,
            endAngle: number,
            counterclockwise?: boolean,
        ): void;
        fill(fillRule?: CanvasFillRule): void;
        fill(path: Path2D, fillRule?: CanvasFillRule): void;
        fillRect(x: number, y: number, w: number, h: number): void;
        fillText(text: string, x: number, y: number, maxWidth?: number): void;
        getImageData(
            sx: number,
            sy: number,
            sw: number,
            sh: number,
            settings?: ImageDataSettings,
        ): ImageData;
        getLineDash(): number[];
        getTransform(): DOMMatrix;
        isContextLost(): boolean;
        isPointInPath(x: number, y: number, fillRule?: CanvasFillRule): boolean;
        isPointInPath(
            path: Path2D,
            x: number,
            y: number,
            fillRule?: CanvasFillRule,
        ): boolean;
        isPointInStroke(x: number, y: number): boolean;
        isPointInStroke(path: Path2D, x: number, y: number): boolean;
        lineTo(x: number, y: number): void;
        measureText(text: string): TextMetrics;
        moveTo(x: number, y: number): void;
        putImageData(imageData: ImageData, dx: number, dy: number): void;
        putImageData(
            imageData: ImageData,
            dx: number,
            dy: number,
            dirtyX: number,
            dirtyY: number,
            dirtyWidth: number,
            dirtyHeight: number,
        ): void;
        quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
        rect(x: number, y: number, w: number, h: number): void;
        reset(): void;
        resetTransform(): void;
        restore(): void;
        rotate(angle: number): void;
        roundRect(
            x: number,
            y: number,
            w: number,
            h: number,
            radii?: number | DOMPointInit | (number | DOMPointInit)[],
        ): void;
        roundRect(
            x: number,
            y: number,
            w: number,
            h: number,
            radii?: number | DOMPointInit | Iterable<number | DOMPointInit, any, any>,
        ): void;
        save(): void;
        scale(x: number, y: number): void;
        setLineDash(segments: number[]): void;
        setLineDash(segments: Iterable<number>): void;
        setTransform(
            a: number,
            b: number,
            c: number,
            d: number,
            e: number,
            f: number,
        ): void;
        setTransform(transform?: DOMMatrix2DInit): void;
        stroke(): void;
        stroke(path: Path2D): void;
        strokeRect(x: number, y: number, w: number, h: number): void;
        strokeText(text: string, x: number, y: number, maxWidth?: number): void;
        transform(
            a: number,
            b: number,
            c: number,
            d: number,
            e: number,
            f: number,
        ): void;
        translate(x: number, y: number): void;
    }

    Hierarchy (View Summary)

    Index

    Properties

    canvas direction fillStyle filter font fontKerning fontStretch fontVariantCaps globalAlpha globalCompositeOperation imageSmoothingEnabled imageSmoothingQuality letterSpacing lineCap lineDashOffset lineJoin lineWidth miterLimit shadowBlur shadowColor shadowOffsetX shadowOffsetY strokeStyle textAlign textBaseline textRendering wordSpacing

    Methods

    arc arcTo beginPath bezierCurveTo clearRect clip closePath createConicGradient createImageData createLinearGradient createPattern createRadialGradient drawImage ellipse fill fillRect fillText getImageData getLineDash getTransform isContextLost isPointInPath isPointInStroke lineTo measureText moveTo putImageData quadraticCurveTo rect reset resetTransform restore rotate roundRect save scale setLineDash setTransform stroke strokeRect strokeText transform translate

    Properties

    canvas: OffscreenCanvas

    MDN Reference

    direction: CanvasDirection

    MDN Reference

    fillStyle: string | CanvasGradient | CanvasPattern

    MDN Reference

    filter: string

    MDN Reference

    font: string

    MDN Reference

    fontKerning: CanvasFontKerning

    MDN Reference

    fontStretch: CanvasFontStretch

    MDN Reference

    fontVariantCaps: CanvasFontVariantCaps

    MDN Reference

    globalAlpha: number

    MDN Reference

    globalCompositeOperation: GlobalCompositeOperation

    MDN Reference

    imageSmoothingEnabled: boolean

    MDN Reference

    imageSmoothingQuality: ImageSmoothingQuality

    MDN Reference

    letterSpacing: string

    MDN Reference

    lineCap: CanvasLineCap

    MDN Reference

    lineDashOffset: number

    MDN Reference

    lineJoin: CanvasLineJoin

    MDN Reference

    lineWidth: number

    MDN Reference

    miterLimit: number

    MDN Reference

    shadowBlur: number

    MDN Reference

    shadowColor: string

    MDN Reference

    shadowOffsetX: number

    MDN Reference

    shadowOffsetY: number

    MDN Reference

    strokeStyle: string | CanvasGradient | CanvasPattern

    MDN Reference

    textAlign: CanvasTextAlign

    MDN Reference

    textBaseline: CanvasTextBaseline

    MDN Reference

    textRendering: CanvasTextRendering

    MDN Reference

    wordSpacing: string

    MDN Reference

    Methods

    • MDN Reference

      Parameters

      • x: number
      • y: number
      • radius: number
      • startAngle: number
      • endAngle: number
      • Optionalcounterclockwise: boolean

      Returns void

    • MDN Reference

      Parameters

      • x1: number
      • y1: number
      • x2: number
      • y2: number
      • radius: number

      Returns void

    • MDN Reference

      Parameters

      • cp1x: number
      • cp1y: number
      • cp2x: number
      • cp2y: number
      • x: number
      • y: number

      Returns void

    • MDN Reference

      Parameters

      • x: number
      • y: number
      • w: number
      • h: number

      Returns void

    • MDN Reference

      Returns void

    • MDN Reference

      Parameters

      • x: number
      • y: number
      • radiusX: number
      • radiusY: number
      • rotation: number
      • startAngle: number
      • endAngle: number
      • Optionalcounterclockwise: boolean

      Returns void

    • MDN Reference

      Parameters

      • x: number
      • y: number
      • w: number
      • h: number

      Returns void

    • MDN Reference

      Parameters

      • text: string
      • x: number
      • y: number
      • OptionalmaxWidth: number

      Returns void

    • MDN Reference

      Returns number[]

    • MDN Reference

      Parameters

      • x: number
      • y: number

      Returns void

    • MDN Reference

      Parameters

      • x: number
      • y: number

      Returns void

    • MDN Reference

      Parameters

      Returns void

    • Parameters

      • imageData: ImageData
      • dx: number
      • dy: number
      • dirtyX: number
      • dirtyY: number
      • dirtyWidth: number
      • dirtyHeight: number

      Returns void

    • MDN Reference

      Parameters

      • cpx: number
      • cpy: number
      • x: number
      • y: number

      Returns void

    • MDN Reference

      Parameters

      • x: number
      • y: number
      • w: number
      • h: number

      Returns void

    • MDN Reference

      Parameters

      • segments: number[]

      Returns void

    • MDN Reference

      Parameters

      Returns void

    • MDN Reference

      Parameters

      • x: number
      • y: number
      • w: number
      • h: number

      Returns void

    • MDN Reference

      Parameters

      • text: string
      • x: number
      • y: number
      • OptionalmaxWidth: number

      Returns void

    • MDN Reference

      Parameters

      • a: number
      • b: number
      • c: number
      • d: number
      • e: number
      • f: number

      Returns void

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