Trait TextBuffer

pub trait TextBuffer {
    // Required methods
    fn width(&self) -> usize;
    fn height(&self) -> usize;
    fn read(&self, row: usize, col: usize) -> Cell;
    fn write(&mut self, row: usize, col: usize, cell: Cell);

    // Provided methods
    fn delete(&mut self, row: usize, col: usize) { ... }
    fn new_line(&mut self, cell: Cell) { ... }
    fn clear(&mut self, cell: Cell) { ... }
}

A 2D array of Cell to render on screen

Required Methods

fn width(&self) -> usize

Columns

fn height(&self) -> usize

Rows

fn read(&self, row: usize, col: usize) -> Cell

Read the character at (row, col)

Avoid use this because it’s usually very slow on real hardware.

fn write(&mut self, row: usize, col: usize, cell: Cell)

Write a character ch at (row, col)

Provided Methods

fn delete(&mut self, row: usize, col: usize)

Delete one character at (row, col).

fn new_line(&mut self, cell: Cell)

Insert one blank line at the bottom, and scroll up one line.

The default method does single read and write for each pixel. Usually it needs rewrite for better performance.

fn clear(&mut self, cell: Cell)

Clear the buffer

Implementors

impl<D> TextBuffer for TextOnGraphic<D>

where D: DrawTarget<Color = Rgb888>,

impl<T: TextBuffer> TextBuffer for TextBufferCache<T>