Struct ScanlineU8 

pub struct ScanlineU8 { /* private fields */ }

Unpacked scanline container with per-pixel u8 coverage values.

Port of C++ scanline_u8. Each pixel in a span has its own coverage byte, stored in a flat array indexed by x - min_x.

Usage protocol:

1. reset(min_x, max_x) — allocate covers and spans arrays
2. add_cell() / add_span() — accumulate span data (X must be monotonically increasing)
3. finalize(y) — set the Y coordinate
4. Iterate with begin() and covers() for rendering
5. reset_spans() — prepare for next scanline

Implementations

impl ScanlineU8

pub fn new() -> Self

pub fn reset(&mut self, min_x: i32, max_x: i32)

Prepare for a new scanline with the given X range.

pub fn begin(&self) -> &[ScanlineSpan]

Get the slice of active spans (for renderer iteration). Spans are 1-indexed; index 0 is a sentinel.

pub fn covers(&self) -> &[u8]

Get the full covers array (spans reference into this via cover_offset).

Trait Implementations

impl Default for ScanlineU8

fn default() -> Self

Returns the “default value” for a type.

impl Scanline for ScanlineU8

fn reset_spans(&mut self)

Prepare for a new scanline, clearing all span data.

fn add_cell(&mut self, x: i32, cover: u32)

Add a single cell at position x with coverage cover.

fn add_span(&mut self, x: i32, len: u32, cover: u32)

Add a horizontal span of len pixels starting at x, all with cover.

fn finalize(&mut self, y: i32)

Finalize the scanline at the given Y coordinate.

fn num_spans(&self) -> u32

Number of spans in this scanline (0 means empty).

fn y(&self) -> i32

The Y coordinate of this scanline.