Struct CanvasContext 

pub struct CanvasContext { /* private fields */ }

Drawing context for the Context::canvas widget.

Provides pixel-level drawing on a braille character grid. Each terminal cell maps to a 2x4 dot matrix, so a canvas of width columns x height rows gives width*2 x height*4 pixel resolution.

Implementations

impl CanvasContext

pub fn width(&self) -> usize

Get the pixel width of the canvas.

pub fn height(&self) -> usize

Get the pixel height of the canvas.

pub fn dot(&mut self, x: usize, y: usize)

Set a single pixel at (x, y).

pub fn line(&mut self, x0: usize, y0: usize, x1: usize, y1: usize)

Draw a line from (x0, y0) to (x1, y1) using Bresenham’s algorithm.

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

Draw a rectangle outline from (x, y) with w width and h height.

pub fn circle(&mut self, cx: usize, cy: usize, r: usize)

Draw a circle outline centered at (cx, cy) with radius r.