OffscreenCanvasRenderingContext2D

class OffscreenCanvasRenderingContext2D extends JavaScriptObject

Annotations: @Native.new("OffscreenCanvasRenderingContext2D")

Properties

canvas no setter

OffscreenCanvas? get canvas

Implementation

OffscreenCanvas? get canvas native;

direction read / write

String? get direction

Implementation

String? get direction native;

set direction(String? value) native;

fillStyle read / write

Object? get fillStyle

Implementation

Object? get fillStyle native;

set fillStyle(Object? value) native;

filter read / write

String? get filter

Implementation

String? get filter native;

set filter(String? value) native;

font read / write

String? get font

Implementation

String? get font native;

set font(String? value) native;

globalAlpha read / write

num? get globalAlpha

Implementation

num? get globalAlpha native;

set globalAlpha(num? value) native;

globalCompositeOperation read / write

String? get globalCompositeOperation

Implementation

String? get globalCompositeOperation native;

set globalCompositeOperation(String? value) native;

hashCode no setter inherited

int get hashCode

Inherited from Interceptor.

Implementation

int get hashCode => Primitives.objectHashCode(this);

imageSmoothingEnabled read / write

bool? get imageSmoothingEnabled

Implementation

bool? get imageSmoothingEnabled native;

set imageSmoothingEnabled(bool? value) native;

imageSmoothingQuality read / write

String? get imageSmoothingQuality

Implementation

String? get imageSmoothingQuality native;

set imageSmoothingQuality(String? value) native;

lineCap read / write

String? get lineCap

Implementation

String? get lineCap native;

set lineCap(String? value) native;

lineDashOffset read / write

num? get lineDashOffset

Implementation

num? get lineDashOffset native;

set lineDashOffset(num? value) native;

lineJoin read / write

String? get lineJoin

Implementation

String? get lineJoin native;

set lineJoin(String? value) native;

lineWidth read / write

num? get lineWidth

Implementation

num? get lineWidth native;

set lineWidth(num? value) native;

miterLimit read / write

num? get miterLimit

Implementation

num? get miterLimit native;

set miterLimit(num? value) native;

runtimeType no setter inherited

Type get runtimeType

Inherited from Interceptor.

Implementation

Type get runtimeType =>
    getRuntimeTypeOfInterceptorNotArray(getInterceptor(this), this);

shadowBlur read / write

num? get shadowBlur

Implementation

num? get shadowBlur native;

set shadowBlur(num? value) native;

shadowColor read / write

String? get shadowColor

Implementation

String? get shadowColor native;

set shadowColor(String? value) native;

shadowOffsetX read / write

num? get shadowOffsetX

Implementation

num? get shadowOffsetX native;

set shadowOffsetX(num? value) native;

shadowOffsetY read / write

num? get shadowOffsetY

Implementation

num? get shadowOffsetY native;

set shadowOffsetY(num? value) native;

strokeStyle read / write

Object? get strokeStyle

Implementation

Object? get strokeStyle native;

set strokeStyle(Object? value) native;

textAlign read / write

String? get textAlign

Implementation

String? get textAlign native;

set textAlign(String? value) native;

textBaseline read / write

String? get textBaseline

Implementation

String? get textBaseline native;

set textBaseline(String? value) native;

Methods

arc()

void arc(
  num x,
  num y,
  num radius,
  num startAngle,
  num endAngle,
  bool? anticlockwise,
)

Implementation

void arc(
  num x,
  num y,
  num radius,
  num startAngle,
  num endAngle,
  bool? anticlockwise,
) native;

arcTo()

void arcTo(num x1, num y1, num x2, num y2, num radius)

Implementation

void arcTo(num x1, num y1, num x2, num y2, num radius) native;

beginPath()

void beginPath()

Implementation

void beginPath() native;

bezierCurveTo()

void bezierCurveTo(num cp1x, num cp1y, num cp2x, num cp2y, num x, num y)

Implementation

void bezierCurveTo(
  num cp1x,
  num cp1y,
  num cp2x,
  num cp2y,
  num x,
  num y,
) native;

clearRect()

void clearRect(num x, num y, num width, num height)

Implementation

void clearRect(num x, num y, num width, num height) native;

clip()

void clip([Path2D? path])

Implementation

void clip([Path2D? path]) native;

closePath()

void closePath()

Implementation

void closePath() native;

commit()

Future<dynamic> commit()

Implementation

Future commit() => promiseToFuture(JS("", "#.commit()", this));

createImageData()

ImageData createImageData(
  dynamic data_OR_imagedata_OR_sw, [
  int? sh_OR_sw,
  dynamic imageDataColorSettings_OR_sh,
  Map<dynamic, dynamic>? imageDataColorSettings,
])

Implementation

ImageData createImageData(
  data_OR_imagedata_OR_sw, [
  int? sh_OR_sw,
  imageDataColorSettings_OR_sh,
  Map? imageDataColorSettings,
]) {
  if ((data_OR_imagedata_OR_sw is ImageData) &&
      sh_OR_sw == null &&
      imageDataColorSettings_OR_sh == null &&
      imageDataColorSettings == null) {
    var imagedata_1 = convertDartToNative_ImageData(data_OR_imagedata_OR_sw);
    return convertNativeToDart_ImageData(_createImageData_1(imagedata_1));
  }
  if (sh_OR_sw != null &&
      (data_OR_imagedata_OR_sw is int) &&
      imageDataColorSettings_OR_sh == null &&
      imageDataColorSettings == null) {
    return convertNativeToDart_ImageData(
      _createImageData_2(data_OR_imagedata_OR_sw, sh_OR_sw),
    );
  }
  if ((imageDataColorSettings_OR_sh is Map) &&
      sh_OR_sw != null &&
      (data_OR_imagedata_OR_sw is int) &&
      imageDataColorSettings == null) {
    var imageDataColorSettings_1 = convertDartToNative_Dictionary(
      imageDataColorSettings_OR_sh,
    );
    return convertNativeToDart_ImageData(
      _createImageData_3(
        data_OR_imagedata_OR_sw,
        sh_OR_sw,
        imageDataColorSettings_1,
      ),
    );
  }
  if (imageDataColorSettings != null &&
      (imageDataColorSettings_OR_sh is int) &&
      sh_OR_sw != null &&
      data_OR_imagedata_OR_sw != null) {
    var imageDataColorSettings_1 = convertDartToNative_Dictionary(
      imageDataColorSettings,
    );
    return convertNativeToDart_ImageData(
      _createImageData_4(
        data_OR_imagedata_OR_sw,
        sh_OR_sw,
        imageDataColorSettings_OR_sh,
        imageDataColorSettings_1,
      ),
    );
  }
  throw new ArgumentError("Incorrect number or type of arguments");
}

createLinearGradient()

CanvasGradient createLinearGradient(num x0, num y0, num x1, num y1)

Implementation

CanvasGradient createLinearGradient(num x0, num y0, num x1, num y1) native;

createPattern()

CanvasPattern? createPattern(dynamic image, String repetitionType)

Implementation

CanvasPattern? createPattern(
  /*CanvasImageSource*/ image,
  String repetitionType,
) native;

createRadialGradient()

CanvasGradient createRadialGradient(
  num x0,
  num y0,
  num r0,
  num x1,
  num y1,
  num r1,
)

Implementation

CanvasGradient createRadialGradient(
  num x0,
  num y0,
  num r0,
  num x1,
  num y1,
  num r1,
) native;

drawImage()

void drawImage(
  dynamic image,
  num sx_OR_x,
  num sy_OR_y, [
  num? sw_OR_width,
  num? height_OR_sh,
  num? dx,
  num? dy,
  num? dw,
  num? dh,
])

Implementation

void drawImage(
  /*CanvasImageSource*/ image,
  num sx_OR_x,
  num sy_OR_y, [
  num? sw_OR_width,
  num? height_OR_sh,
  num? dx,
  num? dy,
  num? dw,
  num? dh,
]) native;

ellipse()

void ellipse(
  num x,
  num y,
  num radiusX,
  num radiusY,
  num rotation,
  num startAngle,
  num endAngle,
  bool? anticlockwise,
)

Implementation

void ellipse(
  num x,
  num y,
  num radiusX,
  num radiusY,
  num rotation,
  num startAngle,
  num endAngle,
  bool? anticlockwise,
) native;

fill()

void fill([dynamic path_OR_winding, String? winding])

Implementation

void fill([path_OR_winding, String? winding]) native;

fillRect()

void fillRect(num x, num y, num width, num height)

Implementation

void fillRect(num x, num y, num width, num height) native;

fillText()

void fillText(String text, num x, num y, [num? maxWidth])

Implementation

void fillText(String text, num x, num y, [num? maxWidth]) native;

getImageData()

ImageData getImageData(int sx, int sy, int sw, int sh)

Implementation

ImageData getImageData(int sx, int sy, int sw, int sh) {
  return convertNativeToDart_ImageData(_getImageData_1(sx, sy, sw, sh));
}

getLineDash()

List<num> getLineDash()

Implementation

List<num> getLineDash() native;

isPointInPath()

bool isPointInPath(
  dynamic path_OR_x,
  num x_OR_y, [
  dynamic winding_OR_y,
  String? winding,
])

Implementation

bool isPointInPath(
  path_OR_x,
  num x_OR_y, [
  winding_OR_y,
  String? winding,
]) native;

isPointInStroke()

bool isPointInStroke(dynamic path_OR_x, num x_OR_y, [num? y])

Implementation

bool isPointInStroke(path_OR_x, num x_OR_y, [num? y]) native;

lineTo()

void lineTo(num x, num y)

Implementation

void lineTo(num x, num y) native;

measureText()

TextMetrics measureText(String text)

Implementation

TextMetrics measureText(String text) native;

moveTo()

void moveTo(num x, num y)

Implementation

void moveTo(num x, num y) native;

noSuchMethod() inherited

dynamic noSuchMethod(Invocation invocation)

Invoked when a nonexistent method or property is accessed.

A dynamic member invocation can attempt to call a member which doesn't exist on the receiving object. Example:

dynamic object = 1;
object.add(42); // Statically allowed, run-time error

This invalid code will invoke the noSuchMethod method of the integer 1 with an Invocation representing the .add(42) call and arguments (which then throws).

Classes can override noSuchMethod to provide custom behavior for such invalid dynamic invocations.

A class with a non-default noSuchMethod invocation can also omit implementations for members of its interface. Example:

class MockList<T> implements List<T> {
  noSuchMethod(Invocation invocation) {
    log(invocation);
    super.noSuchMethod(invocation); // Will throw.
  }
}
void main() {
  MockList().add(42);
}

This code has no compile-time warnings or errors even though the MockList class has no concrete implementation of any of the List interface methods. Calls to List methods are forwarded to noSuchMethod, so this code will log an invocation similar to Invocation.method(#add, [42]) and then throw.

If a value is returned from noSuchMethod, it becomes the result of the original invocation. If the value is not of a type that can be returned by the original invocation, a type error occurs at the invocation.

The default behavior is to throw a NoSuchMethodError.

Inherited from Interceptor.

Implementation

dynamic noSuchMethod(Invocation invocation) {
  throw NoSuchMethodError.withInvocation(this, invocation);
}

putImageData()

void putImageData(
  ImageData imagedata,
  int dx,
  int dy, [
  int? dirtyX,
  int? dirtyY,
  int? dirtyWidth,
  int? dirtyHeight,
])

Implementation

void putImageData(
  ImageData imagedata,
  int dx,
  int dy, [
  int? dirtyX,
  int? dirtyY,
  int? dirtyWidth,
  int? dirtyHeight,
]) {
  if (dirtyX == null &&
      dirtyY == null &&
      dirtyWidth == null &&
      dirtyHeight == null) {
    var imagedata_1 = convertDartToNative_ImageData(imagedata);
    _putImageData_1(imagedata_1, dx, dy);
    return;
  }
  if (dirtyHeight != null &&
      dirtyWidth != null &&
      dirtyY != null &&
      dirtyX != null) {
    var imagedata_1 = convertDartToNative_ImageData(imagedata);
    _putImageData_2(
      imagedata_1,
      dx,
      dy,
      dirtyX,
      dirtyY,
      dirtyWidth,
      dirtyHeight,
    );
    return;
  }
  throw new ArgumentError("Incorrect number or type of arguments");
}

quadraticCurveTo()

void quadraticCurveTo(num cpx, num cpy, num x, num y)

Implementation

void quadraticCurveTo(num cpx, num cpy, num x, num y) native;

rect()

void rect(num x, num y, num width, num height)

Implementation

void rect(num x, num y, num width, num height) native;

resetTransform()

void resetTransform()

Implementation

void resetTransform() native;

restore()

void restore()

Implementation

void restore() native;

rotate()

void rotate(num angle)

Implementation

void rotate(num angle) native;

save()

void save()

Implementation

void save() native;

scale()

void scale(num x, num y)

Implementation

void scale(num x, num y) native;

setLineDash()

void setLineDash(List<num> dash)

Implementation

void setLineDash(List<num> dash) native;

setTransform()

void setTransform(num a, num b, num c, num d, num e, num f)

Implementation

void setTransform(num a, num b, num c, num d, num e, num f) native;

stroke()

void stroke([Path2D? path])

Implementation

void stroke([Path2D? path]) native;

strokeRect()

void strokeRect(num x, num y, num width, num height)

Implementation

void strokeRect(num x, num y, num width, num height) native;

strokeText()

void strokeText(String text, num x, num y, [num? maxWidth])

Implementation

void strokeText(String text, num x, num y, [num? maxWidth]) native;

toString() inherited

String toString()

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string representation.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.

Inherited from Interceptor.

Implementation

String toString() => Primitives.objectToHumanReadableString(this);

transform()

void transform(num a, num b, num c, num d, num e, num f)

Implementation

void transform(num a, num b, num c, num d, num e, num f) native;

translate()

void translate(num x, num y)

Implementation

void translate(num x, num y) native;

Operators

operator ==() inherited

bool operator ==(Object other)

The equality operator.

The default behavior for all Objects is to return true if and only if this object and other are the same object.

Override this method to specify a different equality relation on a class. The overriding method must still be an equivalence relation. That is, it must be:

• Total: It must return a boolean for all arguments. It should never throw.

• Reflexive: For all objects o, o == o must be true.

• Symmetric: For all objects o1 and o2, o1 == o2 and o2 == o1 must either both be true, or both be false.

• Transitive: For all objects o1, o2, and o3, if o1 == o2 and o2 == o3 are true, then o1 == o3 must be true.

The method should also be consistent over time, so whether two objects are equal should only change if at least one of the objects was modified.

If a subclass overrides the equality operator, it should override the hashCode method as well to maintain consistency.

Inherited from Interceptor.

Implementation

bool operator ==(Object other) => identical(this, other);