Trait Canvas

pub trait Canvas: Sized {
    type Pixel: Sized;
    type Image: Sized;

    // Required methods
    fn new(
        width: u32,
        height: u32,
        dark_pixel: Self::Pixel,
        light_pixel: Self::Pixel,
    ) -> Self;
    fn draw_dark_pixel(&mut self, x: u32, y: u32);
    fn into_image(self) -> Self::Image;

    // Provided method
    fn draw_dark_rect(&mut self, left: u32, top: u32, width: u32, height: u32) { ... }
}

Rendering canvas of a QR code image.

Required Associated Types

type Pixel: Sized

type Image: Sized

Required Methods

fn new( width: u32, height: u32, dark_pixel: Self::Pixel, light_pixel: Self::Pixel, ) -> Self

Constructs a new canvas of the given dimensions.

fn draw_dark_pixel(&mut self, x: u32, y: u32)

Draws a single dark pixel at the (x, y) coordinate.

fn into_image(self) -> Self::Image

Finalize the canvas to a real image.

Provided Methods

fn draw_dark_rect(&mut self, left: u32, top: u32, width: u32, height: u32)

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<P: ImagePixel + 'static> Canvas for (P, ImageBuffer<P, Vec<P::Subpixel>>)

type Pixel = P

type Image = ImageBuffer<P, Vec<<P as Pixel>::Subpixel>>

fn new(width: u32, height: u32, dark_pixel: P, light_pixel: P) -> Self

fn draw_dark_pixel(&mut self, x: u32, y: u32)

fn into_image(self) -> ImageBuffer<P, Vec<P::Subpixel>>

Implementors

impl Canvas for Canvas1x2

type Pixel = Dense1x2

type Image = String