From 60d316fa717d5c668a6781d08ed9601f296e5749 Mon Sep 17 00:00:00 2001
From: Dmitry Stepanov <d1maxa@yandex.ru>
Date: Sat, 4 Jul 2026 20:52:22 +0300
Subject: [PATCH] fixed uncontrollable growth of dynamic surface cache

---
 fyrox-impl/src/renderer/cache/mod.rs | 26 ++++++++++++++++++++++----
 fyrox-impl/src/renderer/mod.rs       |  1 +
 2 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/fyrox-impl/src/renderer/cache/mod.rs b/fyrox-impl/src/renderer/cache/mod.rs
index de78f51b3..f57515e25 100644
--- a/fyrox-impl/src/renderer/cache/mod.rs
+++ b/fyrox-impl/src/renderer/cache/mod.rs
@@ -29,6 +29,7 @@ use crate::{
     },
 };
 use fxhash::FxHashMap;
+use fyrox_resource::entry::TimedEntry;
 use fyrox_resource::untyped::ResourceKind;
 use std::{
     ops::{Deref, DerefMut},
@@ -223,10 +224,12 @@ impl<T> TemporaryCache<T> {
 /// as 2D sprites, tile maps, etc.
 #[derive(Default)]
 pub struct DynamicSurfaceCache {
-    cache: FxHashMap<u64, SurfaceResource>,
+    cache: FxHashMap<u64, TimedEntry<SurfaceResource>>,
 }
 
 impl DynamicSurfaceCache {
+    const TTL: f32 = 1.0;
+
     /// Creates a new empty cache.
     pub fn new() -> Self {
         Self::default()
@@ -239,8 +242,9 @@ impl DynamicSurfaceCache {
         unique_id: u64,
         layout: &[VertexAttributeDescriptor],
     ) -> SurfaceResource {
-        if let Some(surface) = self.cache.get(&unique_id) {
-            surface.clone()
+        if let Some(surface) = self.cache.get_mut(&unique_id) {
+            surface.time_to_live = Self::TTL;
+            surface.value.clone()
         } else {
             let default_capacity = 4096;
 
@@ -261,7 +265,13 @@ impl DynamicSurfaceCache {
                 SurfaceData::new(vertex_buffer, triangle_buffer),
             );
 
-            self.cache.insert(unique_id, surface.clone());
+            self.cache.insert(
+                unique_id,
+                TimedEntry {
+                    value: surface.clone(),
+                    time_to_live: Self::TTL,
+                },
+            );
 
             surface
         }
@@ -275,4 +285,12 @@ impl DynamicSurfaceCache {
             surface_data.geometry_buffer.modify().clear();
         }
     }
+
+    /// Updates the cache entries and removes ones that wasn't used for some time.
+    pub fn update(&mut self, dt: f32) {
+        self.cache.retain(|_, entry| {
+            entry.time_to_live -= dt;
+            entry.time_to_live > 0.0
+        })
+    }
 }
diff --git a/fyrox-impl/src/renderer/mod.rs b/fyrox-impl/src/renderer/mod.rs
index 7a707a24e..f3e645a72 100644
--- a/fyrox-impl/src/renderer/mod.rs
+++ b/fyrox-impl/src/renderer/mod.rs
@@ -924,6 +924,7 @@ impl Renderer {
         self.update_texture_cache(resource_manager, dt);
         self.update_shader_cache(dt);
         self.geometry_cache.update(dt);
+        self.dynamic_surface_cache.update(dt);
     }
 
     fn render_scene_observer(