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tiny_skia: Add a capacity limit to GlyphCache

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* Trim the cache if `recently_used` size reaches the limit, even if a
   trim interval hasn't passed.
 * Shrink `entries` and `recently_used` to the limit when trimming.

Signed-off-by: Mohammad AlSaleh <CE.Mohammad.AlSaleh@gmail.com>
This commit is contained in:
Mohammad AlSaleh 2024-01-22 11:27:29 +03:00 • committed by Héctor Ramón Jiménez
parent bdd1891f43
commit 5bd93181f3
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GPG key ID: 7CC46565708259A7
1 changed files with 7 additions and 1 deletions
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8
tiny_skia/src/text.rs
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@ -273,6 +273,7 @@ struct GlyphCache {
impl GlyphCache { impl GlyphCache {
const TRIM_INTERVAL: usize = 300; const TRIM_INTERVAL: usize = 300;
const CAPACITY_LIMIT: usize = 16 * 1024;
fn new() -> Self { fn new() -> Self {
GlyphCache::default() GlyphCache::default()
@ -359,12 +360,17 @@ impl GlyphCache {
} }
pub fn trim(&mut self) { pub fn trim(&mut self) {
if self.trim_count > Self::TRIM_INTERVAL { if self.trim_count > Self::TRIM_INTERVAL
|| self.recently_used.len() >= Self::CAPACITY_LIMIT
{
self.entries self.entries
.retain(|key, _| self.recently_used.contains(key)); .retain(|key, _| self.recently_used.contains(key));
self.recently_used.clear(); self.recently_used.clear();
self.entries.shrink_to(Self::CAPACITY_LIMIT);
self.recently_used.shrink_to(Self::CAPACITY_LIMIT);
self.trim_count = 0; self.trim_count = 0;
} else { } else {
self.trim_count += 1; self.trim_count += 1;