Struct rqrr::PreparedImage

pub struct PreparedImage<S> { /* fields omitted */ }

An black-and-white image that can be mutated on search for QR codes

During search for QR codes, some black zones will be recolored in 'different' shades of black. This is done to speed up the search and mitigate the impact of a huge zones.

Implementations

impl<S> PreparedImage<S> where
    S: ImageBuffer, 

pub fn prepare(buf: S) -> Self

pub fn detect_grids(&mut self) -> Vec<Grid<RefGridImage<'_, S>>>

pub fn without_preparation(buf: S) -> Self

pub fn width(&self) -> usize

Return the width of the image

pub fn height(&self) -> usize

Return the height of the image

pub fn get_pixel_at_point(&self, p: Point) -> PixelColor

pub fn get_pixel_at(&self, x: usize, y: usize) -> PixelColor

pub fn write_state_to(&self, p: &str)

impl PreparedImage<BasicImageBuffer>

pub fn prepare_from_bitmap<F>(w: usize, h: usize, fill: F) -> Self where
    F: FnMut(usize, usize) -> bool, 

Given a function with binary output, generate a searchable image

If the given function returns true the matching pixel will be 'black'.

pub fn prepare_from_greyscale<F>(w: usize, h: usize, fill: F) -> Self where
    F: FnMut(usize, usize) -> u8, 

Given a byte valued function, generate a searchable image

The values returned by the function are interpreted as luminance. i.e. a value of 0 is black, 255 is white.

Trait Implementations

impl<S> Clone for PreparedImage<S> where
    S: Clone, 

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.