Struct OffscreenCanvasRenderingContext2d

pub struct OffscreenCanvasRenderingContext2d { /* private fields */ }

The OffscreenCanvasRenderingContext2d class.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

Implementations

impl OffscreenCanvasRenderingContext2d

pub fn canvas(&self) -> OffscreenCanvas

Getter for the canvas field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvas, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn global_alpha(&self) -> f64

Getter for the globalAlpha field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_global_alpha(&self, value: f64)

Setter for the globalAlpha field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Getter for the globalCompositeOperation field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the globalCompositeOperation field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn stroke_style(&self) -> JsValue

Getter for the strokeStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

👎Deprecated

Setter for the strokeStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the strokeStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_stroke_style_canvas_gradient(&self, value: &CanvasGradient)

Setter for the strokeStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: CanvasGradient, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_stroke_style_canvas_pattern(&self, value: &CanvasPattern)

Setter for the strokeStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: CanvasPattern, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn fill_style(&self) -> JsValue

Getter for the fillStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

👎Deprecated

Setter for the fillStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the fillStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_fill_style_canvas_gradient(&self, value: &CanvasGradient)

Setter for the fillStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: CanvasGradient, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_fill_style_canvas_pattern(&self, value: &CanvasPattern)

Setter for the fillStyle field of this object.

MDN Documentation

This API requires the following crate features to be activated: CanvasPattern, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn filter(&self) -> String

Getter for the filter field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the filter field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn image_smoothing_enabled(&self) -> bool

Getter for the imageSmoothingEnabled field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_image_smoothing_enabled(&self, value: bool)

Setter for the imageSmoothingEnabled field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn line_width(&self) -> f64

Getter for the lineWidth field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_line_width(&self, value: f64)

Setter for the lineWidth field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn line_cap(&self) -> String

Getter for the lineCap field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the lineCap field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn line_join(&self) -> String

Getter for the lineJoin field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the lineJoin field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn miter_limit(&self) -> f64

Getter for the miterLimit field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_miter_limit(&self, value: f64)

Setter for the miterLimit field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn line_dash_offset(&self) -> f64

Getter for the lineDashOffset field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_line_dash_offset(&self, value: f64)

Setter for the lineDashOffset field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn shadow_offset_x(&self) -> f64

Getter for the shadowOffsetX field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_shadow_offset_x(&self, value: f64)

Setter for the shadowOffsetX field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn shadow_offset_y(&self) -> f64

Getter for the shadowOffsetY field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_shadow_offset_y(&self, value: f64)

Setter for the shadowOffsetY field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn shadow_blur(&self) -> f64

Getter for the shadowBlur field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_shadow_blur(&self, value: f64)

Setter for the shadowBlur field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn shadow_color(&self) -> String

Getter for the shadowColor field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the shadowColor field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn font(&self) -> String

Getter for the font field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the font field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn text_align(&self) -> String

Getter for the textAlign field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the textAlign field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn text_baseline(&self) -> String

Getter for the textBaseline field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

Setter for the textBaseline field of this object.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlImageElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, SvgImageElement

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlCanvasElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlVideoElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: ImageBitmap, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvas, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, VideoFrame

This API is unstable and requires --cfg=web_sys_unstable_apis to be activated, as described in the wasm-bindgen guide

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlImageElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, SvgImageElement

impl OffscreenCanvasRenderingContext2d

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.

MDN Documentation

This API requires the following crate features to be activated: HtmlCanvasElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlVideoElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: ImageBitmap, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvas, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, VideoFrame

This API is unstable and requires --cfg=web_sys_unstable_apis to be activated, as described in the wasm-bindgen guide

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlImageElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, SvgImageElement

impl OffscreenCanvasRenderingContext2d

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.

MDN Documentation

This API requires the following crate features to be activated: HtmlCanvasElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: HtmlVideoElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: ImageBitmap, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvas, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The drawImage() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, VideoFrame

This API is unstable and requires --cfg=web_sys_unstable_apis to be activated, as described in the wasm-bindgen guide

impl OffscreenCanvasRenderingContext2d

pub fn begin_path(&self)

The beginPath() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn clip(&self)

The clip() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn clip_with_canvas_winding_rule(&self, winding: CanvasWindingRule)

The clip() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasWindingRule, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The clip() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, Path2d

impl OffscreenCanvasRenderingContext2d

pub fn clip_with_path_2d_and_winding( &self, path: &Path2d, winding: CanvasWindingRule, )

The clip() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasWindingRule, OffscreenCanvasRenderingContext2d, Path2d

impl OffscreenCanvasRenderingContext2d

pub fn fill(&self)

The fill() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn fill_with_canvas_winding_rule(&self, winding: CanvasWindingRule)

The fill() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasWindingRule, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The fill() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, Path2d

impl OffscreenCanvasRenderingContext2d

pub fn fill_with_path_2d_and_winding( &self, path: &Path2d, winding: CanvasWindingRule, )

The fill() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasWindingRule, OffscreenCanvasRenderingContext2d, Path2d

impl OffscreenCanvasRenderingContext2d

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

The isPointInPath() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn is_point_in_path_with_f64_and_canvas_winding_rule( &self, x: f64, y: f64, winding: CanvasWindingRule, ) -> bool

The isPointInPath() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasWindingRule, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The isPointInPath() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, Path2d

impl OffscreenCanvasRenderingContext2d

pub fn is_point_in_path_with_path_2d_and_f64_and_winding( &self, path: &Path2d, x: f64, y: f64, winding: CanvasWindingRule, ) -> bool

The isPointInPath() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasWindingRule, OffscreenCanvasRenderingContext2d, Path2d

impl OffscreenCanvasRenderingContext2d

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

The isPointInStroke() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The isPointInStroke() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, Path2d

impl OffscreenCanvasRenderingContext2d

pub fn stroke(&self)

The stroke() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The stroke() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, Path2d

impl OffscreenCanvasRenderingContext2d

pub fn create_linear_gradient( &self, x0: f64, y0: f64, x1: f64, y1: f64, ) -> CanvasGradient

The createLinearGradient() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasGradient, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn create_pattern_with_html_image_element( &self, image: &HtmlImageElement, repetition: &str, ) -> Result<Option<CanvasPattern>, JsValue>

The createPattern() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasPattern, HtmlImageElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn create_pattern_with_svg_image_element( &self, image: &SvgImageElement, repetition: &str, ) -> Result<Option<CanvasPattern>, JsValue>

The createPattern() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasPattern, OffscreenCanvasRenderingContext2d, SvgImageElement

impl OffscreenCanvasRenderingContext2d

pub fn create_pattern_with_html_canvas_element( &self, image: &HtmlCanvasElement, repetition: &str, ) -> Result<Option<CanvasPattern>, JsValue>

The createPattern() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasPattern, HtmlCanvasElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn create_pattern_with_html_video_element( &self, image: &HtmlVideoElement, repetition: &str, ) -> Result<Option<CanvasPattern>, JsValue>

The createPattern() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasPattern, HtmlVideoElement, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn create_pattern_with_image_bitmap( &self, image: &ImageBitmap, repetition: &str, ) -> Result<Option<CanvasPattern>, JsValue>

The createPattern() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasPattern, ImageBitmap, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn create_pattern_with_offscreen_canvas( &self, image: &OffscreenCanvas, repetition: &str, ) -> Result<Option<CanvasPattern>, JsValue>

The createPattern() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasPattern, OffscreenCanvas, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn create_pattern_with_video_frame( &self, image: &VideoFrame, repetition: &str, ) -> Result<Option<CanvasPattern>, JsValue>

The createPattern() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasPattern, OffscreenCanvasRenderingContext2d, VideoFrame

This API is unstable and requires --cfg=web_sys_unstable_apis to be activated, as described in the wasm-bindgen guide

impl OffscreenCanvasRenderingContext2d

pub fn create_radial_gradient( &self, x0: f64, y0: f64, r0: f64, x1: f64, y1: f64, r1: f64, ) -> Result<CanvasGradient, JsValue>

The createRadialGradient() method.

MDN Documentation

This API requires the following crate features to be activated: CanvasGradient, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn create_image_data_with_sw_and_sh( &self, sw: f64, sh: f64, ) -> Result<ImageData, JsValue>

The createImageData() method.

MDN Documentation

This API requires the following crate features to be activated: ImageData, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn create_image_data_with_imagedata( &self, imagedata: &ImageData, ) -> Result<ImageData, JsValue>

The createImageData() method.

MDN Documentation

This API requires the following crate features to be activated: ImageData, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn get_image_data( &self, sx: f64, sy: f64, sw: f64, sh: f64, ) -> Result<ImageData, JsValue>

The getImageData() method.

MDN Documentation

This API requires the following crate features to be activated: ImageData, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn put_image_data( &self, imagedata: &ImageData, dx: f64, dy: f64, ) -> Result<(), JsValue>

The putImageData() method.

MDN Documentation

This API requires the following crate features to be activated: ImageData, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn put_image_data_with_dirty_x_and_dirty_y_and_dirty_width_and_dirty_height( &self, imagedata: &ImageData, dx: f64, dy: f64, dirty_x: f64, dirty_y: f64, dirty_width: f64, dirty_height: f64, ) -> Result<(), JsValue>

The putImageData() method.

MDN Documentation

This API requires the following crate features to be activated: ImageData, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The arc() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The arcTo() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The bezierCurveTo() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn close_path(&self)

The closePath() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The lineTo() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The moveTo() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The quadraticCurveTo() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The rect() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The roundRect() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn round_rect_with_f64( &self, x: f64, y: f64, w: f64, h: f64, radii: f64, ) -> Result<(), JsValue>

The roundRect() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn round_rect_with_dom_point_init( &self, x: f64, y: f64, w: f64, h: f64, radii: &DomPointInit, ) -> Result<(), JsValue>

The roundRect() method.

MDN Documentation

This API requires the following crate features to be activated: DomPointInit, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn round_rect_with_f64_sequence( &self, x: f64, y: f64, w: f64, h: f64, radii: &JsValue, ) -> Result<(), JsValue>

The roundRect() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn round_rect_with_dom_point_init_sequence( &self, x: f64, y: f64, w: f64, h: f64, radii: &JsValue, ) -> Result<(), JsValue>

The roundRect() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn get_line_dash(&self) -> Array

The getLineDash() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The setLineDash() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The clearRect() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The fillRect() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The strokeRect() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn reset(&self)

The reset() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn restore(&self)

The restore() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn save(&self)

The save() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The fillText() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The fillText() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The measureText() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d, TextMetrics

impl OffscreenCanvasRenderingContext2d

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

The strokeText() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The strokeText() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The getTransform() method.

MDN Documentation

This API requires the following crate features to be activated: DomMatrix, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The resetTransform() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The rotate() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The scale() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The setTransform() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_transform_with_default_dom_matrix_2d_init( &self, ) -> Result<(), JsValue>

The setTransform() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

pub fn set_transform_with_dom_matrix_2d_init( &self, transform: &DomMatrix2dInit, ) -> Result<(), JsValue>

The setTransform() method.

MDN Documentation

This API requires the following crate features to be activated: DomMatrix2dInit, OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The transform() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

impl OffscreenCanvasRenderingContext2d

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

The translate() method.

MDN Documentation

This API requires the following crate features to be activated: OffscreenCanvasRenderingContext2d

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.

MDN documentation

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).

MDN documentation

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

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

MDN documentation

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

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

MDN documentation

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.

MDN documentation

pub fn to_string(&self) -> JsString

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

MDN documentation

pub fn value_of(&self) -> Object

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

MDN documentation

Methods from Deref<Target = JsValue>

pub const NULL: JsValue = _

pub const UNDEFINED: JsValue = _

pub const TRUE: JsValue = _

pub const FALSE: 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.

UTF-16 vs UTF-8

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_array(&self) -> bool

Tests whether this JS value is an instance of Array.

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.

MDN documentation

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

Applies the binary in JS operator on the two JsValues.

MDN documentation

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.

MDN documentation

pub fn bit_not(&self) -> JsValue

Applies the unary ~ JS operator on a JsValue.

MDN documentation

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

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

MDN documentation

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

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

MDN documentation

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

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

MDN documentation

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

Applies the binary < JS operator on the two JsValues.

MDN documentation

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

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

MDN documentation

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

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

MDN documentation

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

Applies the binary > JS operator on the two JsValues.

MDN documentation

pub fn unchecked_into_f64(&self) -> f64

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

MDN documentation

Trait Implementations

impl AsRef<JsValue> for OffscreenCanvasRenderingContext2d

fn as_ref(&self) -> &JsValue

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

impl AsRef<Object> for OffscreenCanvasRenderingContext2d

fn as_ref(&self) -> &Object

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

impl AsRef<OffscreenCanvasRenderingContext2d> for OffscreenCanvasRenderingContext2d

fn as_ref(&self) -> &OffscreenCanvasRenderingContext2d

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

impl Clone for OffscreenCanvasRenderingContext2d

fn clone(&self) -> OffscreenCanvasRenderingContext2d

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OffscreenCanvasRenderingContext2d

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

Formats the value using the given formatter.

impl Deref for OffscreenCanvasRenderingContext2d

type Target = Object

The resulting type after dereferencing.

fn deref(&self) -> &Object

Dereferences the value.

impl From<JsValue> for OffscreenCanvasRenderingContext2d

fn from(obj: JsValue) -> OffscreenCanvasRenderingContext2d

Converts to this type from the input type.

impl From<OffscreenCanvasRenderingContext2d> for JsValue

fn from(obj: OffscreenCanvasRenderingContext2d) -> JsValue

Converts to this type from the input type.

impl From<OffscreenCanvasRenderingContext2d> for Object

fn from(obj: OffscreenCanvasRenderingContext2d) -> Object

Converts to this type from the input type.

impl FromWasmAbi for OffscreenCanvasRenderingContext2d

type Abi = <JsValue as FromWasmAbi>::Abi

The Wasm ABI type that this converts from when coming back out from the ABI boundary.

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

Recover a Self from Self::Abi.

impl<'a> IntoWasmAbi for &'a OffscreenCanvasRenderingContext2d

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

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> Self::Abi

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

impl IntoWasmAbi for OffscreenCanvasRenderingContext2d

type Abi = <JsValue as IntoWasmAbi>::Abi

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> Self::Abi

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

impl JsCast for OffscreenCanvasRenderingContext2d

fn instanceof(val: &JsValue) -> bool

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

fn unchecked_from_js(val: JsValue) -> Self

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

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

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

fn has_type<T>(&self) -> bool

where T: JsCast,

Test whether this JS value has a type T.

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.

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.

fn unchecked_into<T>(self) -> T

where T: JsCast,

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

fn unchecked_ref<T>(&self) -> &T

where T: JsCast,

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

fn is_instance_of<T>(&self) -> bool

where T: JsCast,

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

fn is_type_of(val: &JsValue) -> bool

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

impl LongRefFromWasmAbi for OffscreenCanvasRenderingContext2d

type Abi = <JsValue as LongRefFromWasmAbi>::Abi

Same as RefFromWasmAbi::Abi

type Anchor = OffscreenCanvasRenderingContext2d

Same as RefFromWasmAbi::Anchor

unsafe fn long_ref_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl OptionFromWasmAbi for OffscreenCanvasRenderingContext2d

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.

impl<'a> OptionIntoWasmAbi for &'a OffscreenCanvasRenderingContext2d

fn none() -> Self::Abi

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

impl OptionIntoWasmAbi for OffscreenCanvasRenderingContext2d

fn none() -> Self::Abi

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

impl PartialEq for OffscreenCanvasRenderingContext2d

fn eq(&self, other: &OffscreenCanvasRenderingContext2d) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefFromWasmAbi for OffscreenCanvasRenderingContext2d

type Abi = <JsValue as RefFromWasmAbi>::Abi

The Wasm ABI type references to Self are recovered from.

type Anchor = ManuallyDrop<OffscreenCanvasRenderingContext2d>

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.

unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor

Recover a Self::Anchor from Self::Abi.

impl WasmDescribe for OffscreenCanvasRenderingContext2d

fn describe()

impl Eq for OffscreenCanvasRenderingContext2d

impl StructuralPartialEq for OffscreenCanvasRenderingContext2d