Struct CoverageBuffer 

pub struct CoverageBuffer<'a> {
    pub width: usize,
    pub height: usize,
    /* private fields */
}

Single-bit-per-pixel coverage bitmap.

Bits are packed LSB-first within each byte: pixel (x, y) occupies bit (y*width + x) % 8 of byte (y*width + x) / 8.

Fields

width: usize

height: usize

Implementations

impl<'a> CoverageBuffer<'a>

pub const fn bytes_for(width: usize, height: usize) -> usize

Returns the number of bytes needed for width × height pixels.

pub fn new(data: &'a mut [u8], width: usize, height: usize) -> Option<Self>

Create from a caller-owned byte slice.

Returns None if data is too short.

pub fn clear(&mut self)

Zero all coverage bits (call once per frame before rendering).

pub fn is_covered(&self, x: usize, y: usize) -> bool

Returns true if pixel (x, y) has already been drawn this frame.

pub fn mark_covered(&mut self, x: usize, y: usize)

Mark pixel (x, y) as drawn.

pub fn is_full(&self) -> bool

Returns true when all pixels are covered (early-exit for the renderer).

pub fn fill_ratio(&self) -> f32

Returns the fraction of pixels covered, as a value in [0.0, 1.0]. Useful for telemetry / performance tuning.