Struct GlyphAtlas 

pub struct GlyphAtlas {
    pub allocator: BucketedAtlasAllocator,
    pub pixels: Vec<u8>,
    pub width: u32,
    pub height: u32,
    pub dirty: bool,
}

Fields

allocator: BucketedAtlasAllocator

pixels: Vec<u8>

width: u32

height: u32

dirty: bool

Implementations

impl GlyphAtlas

pub fn new() -> Self

pub fn allocate(&mut self, width: u32, height: u32) -> Option<Allocation>

Allocate a region for a glyph of width×height pixels. The returned allocation reserves a 1-pixel gutter on the right and bottom so adjacent glyphs can’t bleed into each other under float-precision UV rounding. Callers still blit only the requested width×height pixels at rect.min; the extra column/row of transparent pixels is the safety margin.

pub fn deallocate(&mut self, id: AllocId)

pub fn blit_rgba(&mut self, x: u32, y: u32, w: u32, h: u32, data: &[u8])

Blit RGBA pixel data into the atlas at the given position.

pub fn debug_poison_rect(&mut self, x: u32, y: u32, w: u32, h: u32)

Fill a rectangle with solid magenta and mark the atlas dirty.

Debug-build aid: called (under cfg(debug_assertions)) for every rectangle freed by glyph eviction, so any consumer still sampling the freed region — i.e. a retained quad whose UVs were never invalidated — renders unmissable magenta blocks instead of subtly wrong glyphs. Always compiled so tests can exercise it directly.

pub fn blit_mask(&mut self, x: u32, y: u32, w: u32, h: u32, data: &[u8])

Blit a single-channel alpha mask into the atlas as white RGBA.

Trait Implementations

impl Default for GlyphAtlas

fn default() -> Self

Returns the “default value” for a type.