Struct web_sys::CanvasRenderingContext2d

This API requires the following crate features to be activated: CanvasRenderingContext2d

Implementations

impl CanvasRenderingContext2d

pub fn canvas(&self) -> Option<HtmlCanvasElement>

Getter for the canvas field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d, HtmlCanvasElement

impl CanvasRenderingContext2d

pub fn global_alpha(&self) -> f64

Getter for the globalAlpha field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_global_alpha(&self, value: f64)

Setter for the globalAlpha field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn global_composite_operation(&self) -> Result<String, JsValue>

Getter for the globalCompositeOperation field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_global_composite_operation(&self, value: &str) -> Result<(), JsValue>

Setter for the globalCompositeOperation field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn stroke_style(&self) -> JsValue

Getter for the strokeStyle field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_stroke_style(&self, value: &JsValue)

Setter for the strokeStyle field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn fill_style(&self) -> JsValue

Getter for the fillStyle field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_fill_style(&self, value: &JsValue)

Setter for the fillStyle field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn filter(&self) -> String

Getter for the filter field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_filter(&self, value: &str)

Setter for the filter field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn image_smoothing_enabled(&self) -> bool

Getter for the imageSmoothingEnabled field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_image_smoothing_enabled(&self, value: bool)

Setter for the imageSmoothingEnabled field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn line_width(&self) -> f64

Getter for the lineWidth field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_line_width(&self, value: f64)

Setter for the lineWidth field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn line_cap(&self) -> String

Getter for the lineCap field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_line_cap(&self, value: &str)

Setter for the lineCap field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn line_join(&self) -> String

Getter for the lineJoin field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_line_join(&self, value: &str)

Setter for the lineJoin field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn miter_limit(&self) -> f64

Getter for the miterLimit field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_miter_limit(&self, value: f64)

Setter for the miterLimit field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn line_dash_offset(&self) -> f64

Getter for the lineDashOffset field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_line_dash_offset(&self, value: f64)

Setter for the lineDashOffset field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn shadow_offset_x(&self) -> f64

Getter for the shadowOffsetX field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_shadow_offset_x(&self, value: f64)

Setter for the shadowOffsetX field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn shadow_offset_y(&self) -> f64

Getter for the shadowOffsetY field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_shadow_offset_y(&self, value: f64)

Setter for the shadowOffsetY field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn shadow_blur(&self) -> f64

Getter for the shadowBlur field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_shadow_blur(&self, value: f64)

Setter for the shadowBlur field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn shadow_color(&self) -> String

Getter for the shadowColor field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_shadow_color(&self, value: &str)

Setter for the shadowColor field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn font(&self) -> String

Getter for the font field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_font(&self, value: &str)

Setter for the font field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn text_align(&self) -> String

Getter for the textAlign field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_text_align(&self, value: &str)

Setter for the textAlign field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn text_baseline(&self) -> String

Getter for the textBaseline field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_text_baseline(&self, value: &str)

Setter for the textBaseline field of this object.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn draw_window(
 &self,
 window: &Window,
 x: f64,
 y: f64,
 w: f64,
 h: f64,
 bg_color: &str
) -> Result<(), JsValue>

The drawWindow() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, Window

impl CanvasRenderingContext2d

pub fn draw_window_with_flags(
 &self,
 window: &Window,
 x: f64,
 y: f64,
 w: f64,
 h: f64,
 bg_color: &str,
 flags: u32
) -> Result<(), JsValue>

The drawWindow() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, Window

impl CanvasRenderingContext2d

pub fn draw_image_with_html_canvas_element(
 &self,
 image: &HtmlCanvasElement,
 dx: f64,
 dy: f64
) -> Result<(), JsValue>

The drawImage() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, HtmlCanvasElement

impl CanvasRenderingContext2d

pub fn draw_image_with_html_canvas_element_and_dw_and_dh(
 &self,
 image: &HtmlCanvasElement,
 dx: f64,
 dy: f64,
 dw: f64,
 dh: f64
) -> Result<(), JsValue>

The drawImage() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, HtmlCanvasElement

impl CanvasRenderingContext2d

pub fn draw_image_with_html_canvas_element_and_sw_and_sh_and_dx_and_dy_and_dw_and_dh(
 &self,
 image: &HtmlCanvasElement,
 sx: f64,
 sy: f64,
 sw: f64,
 sh: f64,
 dx: f64,
 dy: f64,
 dw: f64,
 dh: f64
) -> Result<(), JsValue>

The drawImage() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, HtmlCanvasElement

impl CanvasRenderingContext2d

pub fn begin_path(&self)

The beginPath() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn clip(&self)

The clip() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn clip_with_path_2d(&self, path: &Path2d)

The clip() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, Path2d

impl CanvasRenderingContext2d

pub fn fill(&self)

The fill() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn fill_with_path_2d(&self, path: &Path2d)

The fill() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, Path2d

impl CanvasRenderingContext2d

pub fn is_point_in_path_with_f64(&self, x: f64, y: f64) -> bool

The isPointInPath() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn is_point_in_path_with_path_2d_and_f64(
    &self,
    path: &Path2d,
    x: f64,
    y: f64
) -> bool

The isPointInPath() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, Path2d

impl CanvasRenderingContext2d

pub fn is_point_in_stroke_with_x_and_y(&self, x: f64, y: f64) -> bool

The isPointInStroke() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn is_point_in_stroke_with_path_and_x_and_y(
    &self,
    path: &Path2d,
    x: f64,
    y: f64
) -> bool

The isPointInStroke() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, Path2d

impl CanvasRenderingContext2d

pub fn stroke(&self)

The stroke() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn stroke_with_path(&self, path: &Path2d)

The stroke() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, Path2d

impl CanvasRenderingContext2d

pub fn add_hit_region(&self) -> Result<(), JsValue>

The addHitRegion() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn clear_hit_regions(&self)

The clearHitRegions() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn remove_hit_region(&self, id: &str)

The removeHitRegion() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn get_line_dash(&self) -> Array

The getLineDash() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_line_dash(&self, segments: &JsValue) -> Result<(), JsValue>

The setLineDash() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn arc(
 &self,
 x: f64,
 y: f64,
 radius: f64,
 start_angle: f64,
 end_angle: f64
) -> Result<(), JsValue>

The arc() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn arc_with_anticlockwise(
 &self,
 x: f64,
 y: f64,
 radius: f64,
 start_angle: f64,
 end_angle: f64,
 anticlockwise: bool
) -> Result<(), JsValue>

The arc() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn arc_to(
 &self,
 x1: f64,
 y1: f64,
 x2: f64,
 y2: f64,
 radius: f64
) -> Result<(), JsValue>

The arcTo() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn bezier_curve_to(
    &self,
    cp1x: f64,
    cp1y: f64,
    cp2x: f64,
    cp2y: f64,
    x: f64,
    y: f64
)

The bezierCurveTo() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn close_path(&self)

The closePath() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn ellipse(
 &self,
 x: f64,
 y: f64,
 radius_x: f64,
 radius_y: f64,
 rotation: f64,
 start_angle: f64,
 end_angle: f64
) -> Result<(), JsValue>

The ellipse() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn ellipse_with_anticlockwise(
 &self,
 x: f64,
 y: f64,
 radius_x: f64,
 radius_y: f64,
 rotation: f64,
 start_angle: f64,
 end_angle: f64,
 anticlockwise: bool
) -> Result<(), JsValue>

The ellipse() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn line_to(&self, x: f64, y: f64)

The lineTo() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn move_to(&self, x: f64, y: f64)

The moveTo() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn quadratic_curve_to(&self, cpx: f64, cpy: f64, x: f64, y: f64)

The quadraticCurveTo() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn rect(&self, x: f64, y: f64, w: f64, h: f64)

The rect() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn clear_rect(&self, x: f64, y: f64, w: f64, h: f64)

The clearRect() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn fill_rect(&self, x: f64, y: f64, w: f64, h: f64)

The fillRect() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn stroke_rect(&self, x: f64, y: f64, w: f64, h: f64)

The strokeRect() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn restore(&self)

The restore() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn save(&self)

The save() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn fill_text(&self, text: &str, x: f64, y: f64) -> Result<(), JsValue>

The fillText() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn fill_text_with_max_width(
 &self,
 text: &str,
 x: f64,
 y: f64,
 max_width: f64
) -> Result<(), JsValue>

The fillText() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn measure_text(&self, text: &str) -> Result<TextMetrics, JsValue>

The measureText() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, TextMetrics

impl CanvasRenderingContext2d

pub fn stroke_text(&self, text: &str, x: f64, y: f64) -> Result<(), JsValue>

The strokeText() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn stroke_text_with_max_width(
 &self,
 text: &str,
 x: f64,
 y: f64,
 max_width: f64
) -> Result<(), JsValue>

The strokeText() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn get_transform(&self) -> Result<DomMatrix, JsValue>

The getTransform() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, DomMatrix

impl CanvasRenderingContext2d

pub fn reset_transform(&self) -> Result<(), JsValue>

The resetTransform() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn rotate(&self, angle: f64) -> Result<(), JsValue>

The rotate() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn scale(&self, x: f64, y: f64) -> Result<(), JsValue>

The scale() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn set_transform(
 &self,
 a: f64,
 b: f64,
 c: f64,
 d: f64,
 e: f64,
 f: f64
) -> Result<(), JsValue>

The setTransform() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn transform(
 &self,
 a: f64,
 b: f64,
 c: f64,
 d: f64,
 e: f64,
 f: f64
) -> Result<(), JsValue>

The transform() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn translate(&self, x: f64, y: f64) -> Result<(), JsValue>

The translate() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d

impl CanvasRenderingContext2d

pub fn draw_custom_focus_ring(&self, element: &Element) -> bool

The drawCustomFocusRing() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, Element

impl CanvasRenderingContext2d

pub fn draw_focus_if_needed(&self, element: &Element) -> Result<(), JsValue>

The drawFocusIfNeeded() method.

This API requires the following crate features to be activated: CanvasRenderingContext2d, Element

impl CanvasRenderingContext2d

pub const DRAWWINDOW_DRAW_CARET: u32

The CanvasRenderingContext2D.DRAWWINDOW_DRAW_CARET const.

This API requires the following crate features to be activated: CanvasRenderingContext2d

pub const DRAWWINDOW_DO_NOT_FLUSH: u32

The CanvasRenderingContext2D.DRAWWINDOW_DO_NOT_FLUSH const.

This API requires the following crate features to be activated: CanvasRenderingContext2d

pub const DRAWWINDOW_DRAW_VIEW: u32

The CanvasRenderingContext2D.DRAWWINDOW_DRAW_VIEW const.

This API requires the following crate features to be activated: CanvasRenderingContext2d

pub const DRAWWINDOW_USE_WIDGET_LAYERS: u32

The CanvasRenderingContext2D.DRAWWINDOW_USE_WIDGET_LAYERS const.

This API requires the following crate features to be activated: CanvasRenderingContext2d

pub const DRAWWINDOW_ASYNC_DECODE_IMAGES: u32

The CanvasRenderingContext2D.DRAWWINDOW_ASYNC_DECODE_IMAGES const.

This API requires the following crate features to be activated: CanvasRenderingContext2d

Methods from Deref<Target = Object>

pub fn constructor(&self) -> Function

The constructor property returns a reference to the Object constructor function that created the instance object.

pub fn has_own_property(&self, property: &JsValue) -> bool

The hasOwnProperty() method returns a boolean indicating whether the object has the specified property as its own property (as opposed to inheriting it).

pub fn is_prototype_of(&self, value: &JsValue) -> bool

The isPrototypeOf() method checks if an object exists in another object’s prototype chain.

pub fn property_is_enumerable(&self, property: &JsValue) -> bool

The propertyIsEnumerable() method returns a Boolean indicating whether the specified property is enumerable.

pub fn to_locale_string(&self) -> JsString

The toLocaleString() method returns a string representing the object. This method is meant to be overridden by derived objects for locale-specific purposes.

pub fn to_string(&self) -> JsString

The toString() method returns a string representing the object.

pub fn value_of(&self) -> Object

The valueOf() method returns the primitive value of the specified object.

Methods from Deref<Target = JsValue>

pub const NULL: JsValue

pub const TRUE: JsValue

pub fn as_f64(&self) -> Option<f64>

Returns the f64 value of this JS value if it’s an instance of a number.

If this JS value is not an instance of a number then this returns None.

pub fn is_string(&self) -> bool

Tests whether this JS value is a JS string.

pub fn as_string(&self) -> Option<String>

If this JS value is a string value, this function copies the JS string value into wasm linear memory, encoded as UTF-8, and returns it as a Rust String.

To avoid the copying and re-encoding, consider the JsString::try_from() function from js-sys instead.

If this JS value is not an instance of a string or if it’s not valid utf-8 then this returns None.

JavaScript strings in general are encoded as UTF-16, but Rust strings are encoded as UTF-8. This can cause the Rust string to look a bit different than the JS string sometimes. For more details see the documentation about the str type which contains a few caveats about the encodings.

pub fn as_bool(&self) -> Option<bool>

Returns the bool value of this JS value if it’s an instance of a boolean.

If this JS value is not an instance of a boolean then this returns None.

pub fn is_null(&self) -> bool

Tests whether this JS value is null

pub fn is_undefined(&self) -> bool

Tests whether this JS value is undefined

pub fn is_symbol(&self) -> bool

Tests whether the type of this JS value is symbol

pub fn is_object(&self) -> bool

Tests whether typeof self == "object" && self !== null.

pub fn is_function(&self) -> bool

Tests whether the type of this JS value is function.

pub fn is_bigint(&self) -> bool

Tests whether the type of this JS value is bigint.

pub fn js_typeof(&self) -> JsValue

Applies the unary typeof JS operator on a JsValue.

pub fn js_in(&self, obj: &JsValue) -> bool

Applies the binary in JS operator on the two JsValues.

pub fn is_truthy(&self) -> bool

Tests whether the value is “truthy”.

pub fn is_falsy(&self) -> bool

Tests whether the value is “falsy”.

pub fn loose_eq(&self, other: &JsValue) -> bool

Compare two JsValues for equality, using the == operator in JS.

pub fn bit_not(&self) -> JsValue

Applies the unary ~ JS operator on a JsValue.

pub fn unsigned_shr(&self, rhs: &JsValue) -> u32

Applies the binary >>> JS operator on the two JsValues.

pub fn checked_div(&self, rhs: &JsValue) -> JsValue

Applies the binary / JS operator on two JsValues, catching and returning any RangeError thrown.

pub fn pow(&self, rhs: &JsValue) -> JsValue

Applies the binary ** JS operator on the two JsValues.

pub fn lt(&self, other: &JsValue) -> bool

Applies the binary < JS operator on the two JsValues.

pub fn le(&self, other: &JsValue) -> bool

Applies the binary <= JS operator on the two JsValues.

pub fn ge(&self, other: &JsValue) -> bool

Applies the binary >= JS operator on the two JsValues.

pub fn gt(&self, other: &JsValue) -> bool

Applies the binary > JS operator on the two JsValues.

pub fn unchecked_into_f64(&self) -> f64

Applies the unary + JS operator on a JsValue. Can throw.

Trait Implementations

impl AsRef<CanvasRenderingContext2d> for CanvasRenderingContext2d

fn as_ref(&self) -> &CanvasRenderingContext2d

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<JsValue> for CanvasRenderingContext2d

fn as_ref(&self) -> &JsValue

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<Object> for CanvasRenderingContext2d

fn as_ref(&self) -> &Object

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for CanvasRenderingContext2d

fn clone(&self) -> CanvasRenderingContext2d

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Debug for CanvasRenderingContext2d

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

impl Deref for CanvasRenderingContext2d

type Target = Object

The resulting type after dereferencing.

fn deref(&self) -> &Object

Dereferences the value.

impl From<CanvasRenderingContext2d> for JsValue

fn from(obj: CanvasRenderingContext2d) -> JsValue

Converts to this type from the input type.

impl From<CanvasRenderingContext2d> for Object

fn from(obj: CanvasRenderingContext2d) -> Object

Converts to this type from the input type.

impl From<JsValue> for CanvasRenderingContext2d

fn from(obj: JsValue) -> CanvasRenderingContext2d

Converts to this type from the input type.

impl FromWasmAbi for CanvasRenderingContext2d

type Abi = <JsValue as FromWasmAbi>::Abi

The wasm ABI type that this converts from when coming back out from the ABI boundary. Read more

unsafe fn from_abi(js: Self::Abi) -> Self

Recover a Self from Self::Abi. Read more

impl IntoWasmAbi for CanvasRenderingContext2d

type Abi = <JsValue as IntoWasmAbi>::Abi

The wasm ABI type that this converts into when crossing the ABI boundary. Read more

fn into_abi(self) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary. Read more

impl<'a> IntoWasmAbi for &'a CanvasRenderingContext2d

type Abi = <&'a JsValue as IntoWasmAbi>::Abi

The wasm ABI type that this converts into when crossing the ABI boundary. Read more

fn into_abi(self) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary. Read more

impl JsCast for CanvasRenderingContext2d

fn instanceof(val: &JsValue) -> bool

Performs a dynamic instanceof check to see whether the JsValue provided is an instance of this type. Read more

fn unchecked_from_js(val: JsValue) -> Self

Performs a zero-cost unchecked conversion from a JsValue into an instance of Self Read more

fn unchecked_from_js_ref(val: &JsValue) -> &Self

Performs a zero-cost unchecked conversion from a &JsValue into an instance of &Self. Read more

fn has_type<T>(&self) -> bool where
T: JsCast,

Test whether this JS value has a type T. Read more

fn dyn_into<T>(self) -> Result<T, Self> where
T: JsCast,

Performs a dynamic cast (checked at runtime) of this value into the target type T. Read more

fn dyn_ref<T>(&self) -> Option<&T> where
T: JsCast,

Performs a dynamic cast (checked at runtime) of this value into the target type T. Read more

fn unchecked_into<T>(self) -> T where
T: JsCast,

Performs a zero-cost unchecked cast into the specified type. Read more

fn unchecked_ref<T>(&self) -> &T where
T: JsCast,

Performs a zero-cost unchecked cast into a reference to the specified type. Read more

fn is_instance_of<T>(&self) -> bool where
T: JsCast,

Test whether this JS value is an instance of the type T. Read more

fn is_type_of(val: &JsValue) -> bool

Performs a dynamic check to see whether the JsValue provided is a value of this type. Read more

impl OptionFromWasmAbi for CanvasRenderingContext2d

fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi. Read more

impl OptionIntoWasmAbi for CanvasRenderingContext2d

fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option. Read more

impl<'a> OptionIntoWasmAbi for &'a CanvasRenderingContext2d

fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option. Read more

impl PartialEq<CanvasRenderingContext2d> for CanvasRenderingContext2d

fn eq(&self, other: &CanvasRenderingContext2d) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

fn ne(&self, other: &CanvasRenderingContext2d) -> bool

This method tests for !=.

impl RefFromWasmAbi for CanvasRenderingContext2d

type Abi = <JsValue as RefFromWasmAbi>::Abi

The wasm ABI type references to Self are recovered from.

type Anchor = ManuallyDrop<CanvasRenderingContext2d>

The type that holds the reference to Self for the duration of the invocation of the function that has an &Self parameter. This is required to ensure that the lifetimes don’t persist beyond one function call, and so that they remain anonymous. Read more