Struct SdfTile 

pub struct SdfTile {
    pub glyph_id: u16,
    pub width: u32,
    pub height: u32,
    pub data: Vec<u8>,
    pub bearing_x: i32,
    pub bearing_y: i32,
    pub advance_x: f32,
}

A single SDF glyph tile produced by the SDF pipeline.

Fields

glyph_id: u16

Glyph ID within the font.

width: u32

Tile width in pixels.

height: u32

Tile height in pixels.

data: Vec<u8>

SDF pixel data (width × height bytes, values 0–255).

bearing_x: i32

Left bearing in pixels (signed).

bearing_y: i32

Top bearing in pixels (signed).

advance_x: f32

Horizontal advance in pixels.

Implementations

impl SdfTile

pub fn from_coverage( glyph_id: u16, coverage: &[f32], width: usize, height: usize, spread: f32, bearing_x: i32, bearing_y: i32, advance_x: f32, ) -> Result<Self, SdfError>

Create an SDF tile from a pre-rasterized floating-point coverage bitmap.

Arguments

• glyph_id — glyph index within the font.
• coverage — greyscale coverage values, width × height, values in [0, 1].
• width, height — bitmap dimensions (must be non-zero).
• spread — maximum SDF distance in pixels; maps ±spread to [0, 255].
• bearing_x, bearing_y — glyph bearing in pixels (signed).
• advance_x — horizontal advance in pixels.

Errors

Returns SdfError::ZeroSize when width or height is zero. Returns SdfError::InvalidInput when coverage.len() != width * height.

Trait Implementations

impl Clone for SdfTile

fn clone(&self) -> SdfTile

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SdfTile

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

Formats the value using the given formatter.