Struct ScanlineP8 

pub struct ScanlineP8 { /* private fields */ }

Packed scanline container with RLE compression for solid (uniform-cover) spans.

Port of C++ scanline_p8. Solid spans store a negative len and a single cover value, reducing memory for large filled areas.

Implementations

impl ScanlineP8

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) -> &[PackedSpan]

Get the slice of active spans (for renderer iteration).

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

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

Trait Implementations

impl Default for ScanlineP8

fn default() -> Self

Returns the “default value” for a type.

impl Scanline for ScanlineP8

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.