Struct GlyphAtlas 

pub struct GlyphAtlas { /* private fields */ }

Implementations

impl GlyphAtlas

pub fn new(width: u32, height: u32) -> Self

pub fn id(&self) -> u64

Unique identity for this atlas instance.

Glyph UVs are only meaningful for the atlas that produced them; caches must compare this id before reusing shaped output across text systems.

pub fn size(&self) -> (u32, u32)

pub fn version(&self) -> u64

pub fn epoch(&self) -> u64

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

pub fn bytes(&self) -> usize

Returns the number of bytes occupied by the atlas bitmap.

pub fn compact(&mut self)

Drops the least recently used half of the atlas and repacks it.

Entries that were not looked up recently are evicted, the survivors are moved to the top of the bitmap, and the whole texture is marked dirty. Glyph UVs emitted before this call become stale, so callers that keep a render list across the call must repaint it (the renderer leaves this until after the frame has been uploaded).

pub fn shrink_to_fit(&mut self)

Compacts the atlas and shrinks the bitmap to fit the survivors.

The texture never grows here; dimensions are rounded up to the next power of two and clamped to the current size, with a small floor so a single eviction does not immediately trigger another resize.

pub fn take_dirty(&mut self) -> Option<AtlasDirty>

pub fn copy_rect(&self, x: u32, y: u32, w: u32, h: u32, out: &mut Vec<u8>)

pub fn entry(&self, key: &CacheKey) -> Option<AtlasEntry>

pub fn sprite(&self, key: u64) -> Option<AtlasEntry>

pub fn insert_sprite( &mut self, key: u64, w: u32, h: u32, alpha: &[u8], ) -> AtlasEntry