Struct SsaaCanvas 

pub struct SsaaCanvas { /* private fields */ }

A supersampling anti-aliasing (SSAA) canvas wrapper that renders at a higher resolution on an offscreen canvas and downscales to the display canvas for smoother polygon edges in software-rendered 3D scenes.

The offscreen context is scaled by scale_factor so that all drawing code can use logical pixel coordinates without modification. After rendering, call present() to draw the high-resolution buffer onto the visible canvas with high-quality image smoothing.

Implementations

impl SsaaCanvas

Implements construction, presentation, and anti-aliasing methods for SsaaCanvas.

pub fn from_selector<S>( canvas_selector: S, width: f64, height: f64, ) -> Option<SsaaCanvas>

where S: AsRef<str>,

Creates an SsaaCanvas from a CSS selector using the default scale factor.

Arguments

• S: AsRef<str> - The CSS selector for the display canvas element.
• f64 - The logical display width in CSS pixels.
• f64 - The logical display height in CSS pixels.

Returns

• Option<SsaaCanvas> - The SSAA canvas, or None if the canvas was not found.

pub fn from_selector_with_scale<S>( canvas_selector: S, width: f64, height: f64, scale_factor: f64, ) -> Option<SsaaCanvas>

where S: AsRef<str>,

Creates an SsaaCanvas from a CSS selector with a custom SSAA scale factor.

The offscreen canvas is created at width * scale_factor by height * scale_factor pixels, and its context is pre-scaled so that drawing code uses logical coordinates.

Arguments

• S: AsRef<str> - The CSS selector for the display canvas element.
• f64 - The logical display width in CSS pixels.
• f64 - The logical display height in CSS pixels.
• f64 - The supersampling scale factor (e.g., 2.0 for 4x SSAA).

Returns

• Option<SsaaCanvas> - The SSAA canvas, or None if the canvas was not found.

pub fn present(&self)

Presents the offscreen buffer onto the display canvas with high-quality downscaling.

Clears the display canvas, then draws the offscreen canvas scaled down to the logical display size. The active quality preset is applied once at construction via enable_smoothing — there is no need to re-apply it every frame, since the preset never changes mid-render.

#32: the previous version called apply_quality on every present(), costing set_image_smoothing_enabled + 2×Reflect

• 4×from_str ≈ 7 JS crossings per frame for a value that was invariant across the entire session.

pub fn clear(&self)

Clears the offscreen buffer to transparent.

pub fn clear_color<C>(&self, color: C)

where C: AsRef<str>,

Clears the offscreen buffer and fills it with the given CSS color.

Arguments

• C: AsRef<str> - The CSS color string.

pub fn enable_smoothing(&self)

Enables high-quality anti-aliasing on both the display and offscreen contexts.

Applies the active quality preset to both contexts via the shared apply_quality helper.

impl SsaaCanvas

pub fn get_display_canvas(&self) -> &HtmlCanvasElement

pub fn get_mut_display_canvas(&mut self) -> &mut HtmlCanvasElement

pub fn set_display_canvas(&mut self, val: HtmlCanvasElement) -> &mut Self

pub fn get_display_context(&self) -> &CanvasRenderingContext2d

pub fn get_mut_display_context(&mut self) -> &mut CanvasRenderingContext2d

pub fn set_display_context( &mut self, val: CanvasRenderingContext2d, ) -> &mut Self

pub fn get_offscreen_canvas(&self) -> &HtmlCanvasElement

pub fn get_mut_offscreen_canvas(&mut self) -> &mut HtmlCanvasElement

pub fn set_offscreen_canvas(&mut self, val: HtmlCanvasElement) -> &mut Self

pub fn get_offscreen_context(&self) -> &CanvasRenderingContext2d

pub fn get_mut_offscreen_context(&mut self) -> &mut CanvasRenderingContext2d

pub fn set_offscreen_context( &mut self, val: CanvasRenderingContext2d, ) -> &mut Self

pub fn get_scale_factor(&self) -> f64

pub fn get_mut_scale_factor(&mut self) -> &mut f64

pub fn set_scale_factor(&mut self, val: f64) -> &mut Self

pub fn get_quality(&self) -> RenderQuality

pub fn get_mut_quality(&mut self) -> &mut RenderQuality

pub fn set_quality(&mut self, val: RenderQuality) -> &mut Self

pub fn get_width(&self) -> f64

pub fn get_mut_width(&mut self) -> &mut f64

pub fn set_width(&mut self, val: f64) -> &mut Self

pub fn get_height(&self) -> f64

pub fn get_mut_height(&mut self) -> &mut f64

pub fn set_height(&mut self, val: f64) -> &mut Self

impl SsaaCanvas

pub fn new( display_canvas: HtmlCanvasElement, display_context: CanvasRenderingContext2d, offscreen_canvas: HtmlCanvasElement, offscreen_context: CanvasRenderingContext2d, scale_factor: f64, width: f64, height: f64, ) -> Self

Trait Implementations

impl Clone for SsaaCanvas

fn clone(&self) -> SsaaCanvas

Returns a duplicate of the value.

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

Performs copy-assignment from source.