Struct SymbolCache 

pub struct SymbolCache { /* private fields */ }

rasters of symbols per (id, width, palette), the least recently used one dropped beyond 256

Implementations

impl SymbolCache

pub fn new() -> SymbolCache

pub fn len(&self) -> usize

the number of rasters kept

pub fn is_empty(&self) -> bool

pub fn clear(&mut self)

drop every raster

pub fn get( &mut self, g: &mut Gfx<'_>, id: u32, sym: &Symbol, w: i32, pal: &SymPalette, ) -> Option<Rc<Surface>>

the raster of symbol id w px wide in this palette, made on the first call; None for widths outside 1..=SYM_CACHE_MAX_W

pub fn draw( &mut self, g: &mut Gfx<'_>, id: u32, sym: &Symbol, x: i32, y: i32, w: i32, pal: &SymPalette, opacity: u32, )

draw symbol id w px wide with its top-left corner at x, y (draw context coordinates) at opacity 0..255: the cached raster, wider than SYM_CACHE_MAX_W the vectors (through a raster when translucent)

Trait Implementations

impl Default for SymbolCache

fn default() -> Self

Returns the “default value” for a type.