Struct AlphaMaskU8 

pub struct AlphaMaskU8<'a, const STEP: usize, const OFFSET: usize, MF: MaskFunction> { /* private fields */ }

Alpha mask with bounds-checked access to a rendering buffer.

STEP is the number of bytes per pixel, OFFSET is the byte offset within each pixel to the mask component.

Port of C++ alpha_mask_u8<Step, Offset, MaskF>.

Implementations

impl<'a, const STEP: usize, const OFFSET: usize, MF: MaskFunction> AlphaMaskU8<'a, STEP, OFFSET, MF>

pub fn new(rbuf: &'a RowAccessor, mask_function: MF) -> Self

pub fn mask_function(&self) -> &MF

Trait Implementations

impl<const STEP: usize, const OFFSET: usize, MF: MaskFunction> AlphaMask for AlphaMaskU8<'_, STEP, OFFSET, MF>

fn pixel(&self, x: i32, y: i32) -> u8

fn combine_pixel(&self, x: i32, y: i32, val: u8) -> u8

fn fill_hspan(&self, x: i32, y: i32, dst: &mut [u8])

fn combine_hspan(&self, x: i32, y: i32, dst: &mut [u8])

fn fill_vspan(&self, x: i32, y: i32, dst: &mut [u8])

fn combine_vspan(&self, x: i32, y: i32, dst: &mut [u8])