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: string | null,
    ): CanvasPattern | null;
    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;
    save(): void;
    scale(x: number, y: number): void;
    setLineDash(segments: 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)

CanvasCompositing
CanvasDrawImage
CanvasDrawPath
CanvasFillStrokeStyles
CanvasFilters
CanvasImageData
CanvasImageSmoothing
CanvasPath
CanvasPathDrawingStyles
CanvasRect
CanvasShadowStyles
CanvasState
CanvasText
CanvasTextDrawingStyles
CanvasTransform
- OffscreenCanvasRenderingContext2D

Properties

filter

filter: string

MDN Reference

font

font: string

MDN Reference

fontKerning

fontKerning: CanvasFontKerning

MDN Reference

fontStretch

fontStretch: CanvasFontStretch

MDN Reference

fontVariantCaps

fontVariantCaps: CanvasFontVariantCaps

MDN Reference

globalAlpha

globalAlpha: number

MDN Reference

globalCompositeOperation

globalCompositeOperation: GlobalCompositeOperation

MDN Reference

imageSmoothingEnabled

imageSmoothingEnabled: boolean

MDN Reference

imageSmoothingQuality

imageSmoothingQuality: ImageSmoothingQuality

MDN Reference

letterSpacing

letterSpacing: string

MDN Reference

lineCap

lineCap: CanvasLineCap

MDN Reference

lineDashOffset

lineDashOffset: number

MDN Reference

lineJoin

lineJoin: CanvasLineJoin

MDN Reference

lineWidth

lineWidth: number

MDN Reference

miterLimit

miterLimit: number

MDN Reference

shadowBlur

shadowBlur: number

MDN Reference

shadowColor

shadowColor: string

MDN Reference

shadowOffsetX

shadowOffsetX: number

MDN Reference

shadowOffsetY

shadowOffsetY: number

MDN Reference

strokeStyle

strokeStyle: string | CanvasGradient | CanvasPattern

MDN Reference

textAlign

textAlign: CanvasTextAlign

MDN Reference

textBaseline

textBaseline: CanvasTextBaseline

MDN Reference

textRendering

textRendering: CanvasTextRendering

MDN Reference

wordSpacing

wordSpacing: string

MDN Reference

Methods

arc

arc(
    x: number,
    y: number,
    radius: number,
    startAngle: number,
    endAngle: number,
    counterclockwise?: boolean,
): void
MDN Reference
Parameters
- x: number
- y: number
- radius: number
- startAngle: number
- endAngle: number
- Optionalcounterclockwise: boolean
Returns void
Inherited from CanvasPath.arc
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7676

arcTo

arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void
MDN Reference
Parameters
- x1: number
- y1: number
- x2: number
- y2: number
- radius: number
Returns void
Inherited from CanvasPath.arcTo
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7678

beginPath

beginPath(): void
MDN Reference

Returns void
Inherited from CanvasDrawPath.beginPath
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7599

bezierCurveTo

bezierCurveTo(
    cp1x: number,
    cp1y: number,
    cp2x: number,
    cp2y: number,
    x: number,
    y: number,
): void
MDN Reference
Parameters
- cp1x: number
- cp1y: number
- cp2x: number
- cp2y: number
- x: number
- y: number
Returns void
Inherited from CanvasPath.bezierCurveTo
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7680

clearRect

clearRect(x: number, y: number, w: number, h: number): void
MDN Reference
Parameters
- x: number
- y: number
- w: number
- h: number
Returns void
Inherited from CanvasRect.clearRect
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7735

clip

clip(fillRule?: CanvasFillRule): void
MDN Reference
Parameters
- OptionalfillRule: CanvasFillRule
Returns void
Inherited from CanvasDrawPath.clip
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7601
clip(path: Path2D, fillRule?: CanvasFillRule): void
Parameters
- path: Path2D
- OptionalfillRule: CanvasFillRule
Returns void
Inherited from CanvasDrawPath.clip
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7602

closePath

closePath(): void
MDN Reference

Returns void
Inherited from CanvasPath.closePath
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7682

createConicGradient

createConicGradient(startAngle: number, x: number, y: number): CanvasGradient
MDN Reference
Parameters
- startAngle: number
- x: number
- y: number
Returns CanvasGradient
Inherited from CanvasFillStrokeStyles.createConicGradient
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7623

createImageData

createImageData(sw: number, sh: number, settings?: ImageDataSettings): ImageData
MDN Reference
Parameters
- sw: number
- sh: number
- Optionalsettings: ImageDataSettings
Returns ImageData
Inherited from CanvasImageData.createImageData
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7658
createImageData(imageData: ImageData): ImageData
Parameters
- imageData: ImageData
Returns ImageData
Inherited from CanvasImageData.createImageData
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7659

createLinearGradient

createLinearGradient(
    x0: number,
    y0: number,
    x1: number,
    y1: number,
): CanvasGradient
MDN Reference
Parameters
- x0: number
- y0: number
- x1: number
- y1: number
Returns CanvasGradient
Inherited from CanvasFillStrokeStyles.createLinearGradient
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7625

createPattern

createPattern(
image: CanvasImageSource,
repetition: string | null,
): CanvasPattern | null
MDN Reference
Parameters
- image: CanvasImageSource
- repetition: string | null
Returns CanvasPattern | null
Inherited from CanvasFillStrokeStyles.createPattern
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7627

createRadialGradient

createRadialGradient(
    x0: number,
    y0: number,
    r0: number,
    x1: number,
    y1: number,
    r1: number,
): CanvasGradient
MDN Reference
Parameters
- x0: number
- y0: number
- r0: number
- x1: number
- y1: number
- r1: number
Returns CanvasGradient
Inherited from CanvasFillStrokeStyles.createRadialGradient
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7629

drawImage

drawImage(image: CanvasImageSource, dx: number, dy: number): void
MDN Reference
Parameters
- image: CanvasImageSource
- dx: number
- dy: number
Returns void
Inherited from CanvasDrawImage.drawImage
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7592
drawImage(
    image: CanvasImageSource,
    dx: number,
    dy: number,
    dw: number,
    dh: number,
): void
Parameters
- image: CanvasImageSource
- dx: number
- dy: number
- dw: number
- dh: number
Returns void
Inherited from CanvasDrawImage.drawImage
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7593
drawImage(
    image: CanvasImageSource,
    sx: number,
    sy: number,
    sw: number,
    sh: number,
    dx: number,
    dy: number,
    dw: number,
    dh: number,
): void
Parameters
- image: CanvasImageSource
- sx: number
- sy: number
- sw: number
- sh: number
- dx: number
- dy: number
- dw: number
- dh: number
Returns void
Inherited from CanvasDrawImage.drawImage
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7594

ellipse

ellipse(
    x: number,
    y: number,
    radiusX: number,
    radiusY: number,
    rotation: number,
    startAngle: number,
    endAngle: number,
    counterclockwise?: boolean,
): void
MDN Reference
Parameters
- x: number
- y: number
- radiusX: number
- radiusY: number
- rotation: number
- startAngle: number
- endAngle: number
- Optionalcounterclockwise: boolean
Returns void
Inherited from CanvasPath.ellipse
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7684

fill

fill(fillRule?: CanvasFillRule): void
MDN Reference
Parameters
- OptionalfillRule: CanvasFillRule
Returns void
Inherited from CanvasDrawPath.fill
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7604
fill(path: Path2D, fillRule?: CanvasFillRule): void
Parameters
- path: Path2D
- OptionalfillRule: CanvasFillRule
Returns void
Inherited from CanvasDrawPath.fill
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7605

fillRect

fillRect(x: number, y: number, w: number, h: number): void
MDN Reference
Parameters
- x: number
- y: number
- w: number
- h: number
Returns void
Inherited from CanvasRect.fillRect
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7737

fillText

fillText(text: string, x: number, y: number, maxWidth?: number): void
MDN Reference
Parameters
- text: string
- x: number
- y: number
- OptionalmaxWidth: number
Returns void
Inherited from CanvasText.fillText
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7790

getImageData

getImageData(
    sx: number,
    sy: number,
    sw: number,
    sh: number,
    settings?: ImageDataSettings,
): ImageData
MDN Reference
Parameters
- sx: number
- sy: number
- sw: number
- sh: number
- Optionalsettings: ImageDataSettings
Returns ImageData
Inherited from CanvasImageData.getImageData
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7661

getLineDash

getLineDash(): number[]
MDN Reference

Returns number[]
Inherited from CanvasPathDrawingStyles.getLineDash
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7709

getTransform

getTransform(): DOMMatrix
MDN Reference

Returns DOMMatrix
Inherited from CanvasTransform.getTransform
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7822

isContextLost

isContextLost(): boolean
MDN Reference

Returns boolean
Inherited from CanvasState.isContextLost
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7779

isPointInPath

isPointInPath(x: number, y: number, fillRule?: CanvasFillRule): boolean
MDN Reference
Parameters
- x: number
- y: number
- OptionalfillRule: CanvasFillRule
Returns boolean
Inherited from CanvasDrawPath.isPointInPath
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7607
isPointInPath(
    path: Path2D,
    x: number,
    y: number,
    fillRule?: CanvasFillRule,
): boolean
Parameters
- path: Path2D
- x: number
- y: number
- OptionalfillRule: CanvasFillRule
Returns boolean
Inherited from CanvasDrawPath.isPointInPath
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7608

isPointInStroke

isPointInStroke(x: number, y: number): boolean
MDN Reference
Parameters
- x: number
- y: number
Returns boolean
Inherited from CanvasDrawPath.isPointInStroke
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7610
isPointInStroke(path: Path2D, x: number, y: number): boolean
Parameters
- path: Path2D
- x: number
- y: number
Returns boolean
Inherited from CanvasDrawPath.isPointInStroke
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7611

lineTo

lineTo(x: number, y: number): void
MDN Reference
Parameters
- x: number
- y: number
Returns void
Inherited from CanvasPath.lineTo
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7686

measureText

measureText(text: string): TextMetrics
MDN Reference
Parameters
- text: string
Returns TextMetrics
Inherited from CanvasText.measureText
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7792

moveTo

moveTo(x: number, y: number): void
MDN Reference
Parameters
- x: number
- y: number
Returns void
Inherited from CanvasPath.moveTo
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7688

putImageData

putImageData(imageData: ImageData, dx: number, dy: number): void
MDN Reference
Parameters
- imageData: ImageData
- dx: number
- dy: number
Returns void
Inherited from CanvasImageData.putImageData
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7663
putImageData(
    imageData: ImageData,
    dx: number,
    dy: number,
    dirtyX: number,
    dirtyY: number,
    dirtyWidth: number,
    dirtyHeight: number,
): void
Parameters
- imageData: ImageData
- dx: number
- dy: number
- dirtyX: number
- dirtyY: number
- dirtyWidth: number
- dirtyHeight: number
Returns void
Inherited from CanvasImageData.putImageData
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7664

quadraticCurveTo

quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void
MDN Reference
Parameters
- cpx: number
- cpy: number
- x: number
- y: number
Returns void
Inherited from CanvasPath.quadraticCurveTo
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7690

rect

rect(x: number, y: number, w: number, h: number): void
MDN Reference
Parameters
- x: number
- y: number
- w: number
- h: number
Returns void
Inherited from CanvasPath.rect
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7692

reset

reset(): void
MDN Reference

Returns void
Inherited from CanvasState.reset
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7781

resetTransform

resetTransform(): void
MDN Reference

Returns void
Inherited from CanvasTransform.resetTransform
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7824

restore

restore(): void
MDN Reference

Returns void
Inherited from CanvasState.restore
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7783

rotate

rotate(angle: number): void
MDN Reference
Parameters
- angle: number
Returns void
Inherited from CanvasTransform.rotate
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7826

roundRect

roundRect(
    x: number,
    y: number,
    w: number,
    h: number,
    radii?: number | DOMPointInit | (number | DOMPointInit)[],
): void
MDN Reference
Parameters
- x: number
- y: number
- w: number
- h: number
- Optionalradii: number | DOMPointInit | (number | DOMPointInit)[]
Returns void
Inherited from CanvasPath.roundRect
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7694

save

save(): void
MDN Reference

Returns void
Inherited from CanvasState.save
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7785

scale

scale(x: number, y: number): void
MDN Reference
Parameters
- x: number
- y: number
Returns void
Inherited from CanvasTransform.scale
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7828

setLineDash

setLineDash(segments: number[]): void
MDN Reference
Parameters
- segments: number[]
Returns void
Inherited from CanvasPathDrawingStyles.setLineDash
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7711

setTransform

setTransform(
    a: number,
    b: number,
    c: number,
    d: number,
    e: number,
    f: number,
): void
MDN Reference
Parameters
- a: number
- b: number
- c: number
- d: number
- e: number
- f: number
Returns void
Inherited from CanvasTransform.setTransform
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7830
setTransform(transform?: DOMMatrix2DInit): void
Parameters
- Optionaltransform: DOMMatrix2DInit
Returns void
Inherited from CanvasTransform.setTransform
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7831

stroke

stroke(): void
MDN Reference

Returns void
Inherited from CanvasDrawPath.stroke
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7613
stroke(path: Path2D): void
Parameters
- path: Path2D
Returns void
Inherited from CanvasDrawPath.stroke
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7614

strokeRect

strokeRect(x: number, y: number, w: number, h: number): void
MDN Reference
Parameters
- x: number
- y: number
- w: number
- h: number
Returns void
Inherited from CanvasRect.strokeRect
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7739

strokeText

strokeText(text: string, x: number, y: number, maxWidth?: number): void
MDN Reference
Parameters
- text: string
- x: number
- y: number
- OptionalmaxWidth: number
Returns void
Inherited from CanvasText.strokeText
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7794

transform

transform(
    a: number,
    b: number,
    c: number,
    d: number,
    e: number,
    f: number,
): void
MDN Reference
Parameters
- a: number
- b: number
- c: number
- d: number
- e: number
- f: number
Returns void
Inherited from CanvasTransform.transform
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7833

translate

translate(x: number, y: number): void
MDN Reference
Parameters
- x: number
- y: number
Returns void
Inherited from CanvasTransform.translate
- Defined in node_modules/typescript/lib/lib.dom.d.ts:7835

Interface OffscreenCanvasRenderingContext2D

Hierarchy (View Summary)

Index

Properties

Methods

Properties

Readonlycanvas

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

Parameters

Returns void

arcTo

Parameters

Returns void

beginPath

Returns void

bezierCurveTo

Parameters

Returns void

clearRect

Parameters

Returns void

clip

Parameters

Returns void

Parameters

Returns void

closePath

Returns void

createConicGradient

Parameters

Returns CanvasGradient

createImageData

Parameters

Returns ImageData

Parameters

Returns ImageData

createLinearGradient

Parameters

Returns CanvasGradient

createPattern

Parameters

Returns CanvasPattern | null

createRadialGradient

Parameters

Returns CanvasGradient

drawImage

Parameters

Returns void

Parameters

Returns void

Parameters

Returns void

ellipse

`Readonly`canvas