Struct TwoColorMatrix 

pub struct TwoColorMatrix {
    pub black: Matrix,
    pub red: Matrix,
}

Container for two-color (black and red) bitmap data.

This structure holds separate bitmap matrices for black and red colors, used for two-color printing on compatible printers like QL-820NWB.

Both matrices must have identical dimensions and represent 1-bit bitmap data packed into bytes (8 pixels per byte).

Fields

black: Matrix

red: Matrix

Implementations

impl TwoColorMatrix

pub fn new(black: Matrix, red: Matrix) -> Result<Self, String>

Create a new TwoColorMatrix from black and red bitmap data.

Arguments

• black - Matrix containing black pixel data
• red - Matrix containing red pixel data

Returns

• Ok(TwoColorMatrix) - Successfully created two-color matrix
• Err(String) - Error message if dimensions don’t match

Example

let black_data: Matrix = vec![vec![0xFF; 90]; 300]; // 300 lines, 90 bytes each
let red_data: Matrix = vec![vec![0x00; 90]; 300];   // Same dimensions
 
let two_color = TwoColorMatrix::new(black_data, red_data)?;

pub fn to_alternating_matrix(&self) -> Matrix

Convert two-color data to alternating matrix format for printing.

This method interleaves black and red rows to create a single matrix where black and red lines alternate. This format is required by the printer’s two-color raster commands.

Returns

Matrix with double the height, alternating between black and red rows

Example

let two_color = TwoColorMatrix::new(black_data, red_data)?;
let alternating = two_color.to_alternating_matrix();
assert_eq!(alternating.len(), 4); // 2 * 2 original rows

Trait Implementations

impl Clone for TwoColorMatrix

fn clone(&self) -> TwoColorMatrix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TwoColorMatrix

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.