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Use ouroboros in FontSystem to avoid lifetime bound

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Perhaps not quite what ouroboros is expected to be used for, but it's
not too bad, and avoiding the lifetime bound can be a huge help.
This commit is contained in:
Ian Douglas Scott 2022-11-02 19:25:18 -07:00 • committed by Jeremy Soller
parent ac354c3a2a
commit 0d3fb1dd9d
8 changed files with 85 additions and 62 deletions
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6
src/swash.rs
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@ -9,7 +9,7 @@ use crate::{CacheKey, Color, FontSystem};
pub use swash::scale::image::{Content as SwashContent, Image as SwashImage};
fn swash_image<'a>(font_system: &'a FontSystem<'a>, context: &mut ScaleContext, cache_key: CacheKey) -> Option<SwashImage> {
fn swash_image<'a>(font_system: &'a FontSystem, context: &mut ScaleContext, cache_key: CacheKey) -> Option<SwashImage> {
let font = match font_system.get_font(cache_key.font_id) {
Some(some) => some,
None => {
@ -49,14 +49,14 @@ fn swash_image<'a>(font_system: &'a FontSystem<'a>, context: &mut ScaleContext,
/// Cache for rasterizing with the swash scaler
pub struct SwashCache<'a> {
font_system: &'a FontSystem<'a>,
font_system: &'a FontSystem,
context: ScaleContext,
pub image_cache: HashMap<CacheKey, Option<SwashImage>>,
}
impl<'a> SwashCache<'a> {
/// Create a new swash cache
pub fn new(font_system: &'a FontSystem<'a>) -> Self {
pub fn new(font_system: &'a FontSystem) -> Self {
Self {
font_system: font_system,
context: ScaleContext::new(),