From 493c36ac712ef04523065b94988a88cc4db16b1a Mon Sep 17 00:00:00 2001
From: Héctor Ramón Jiménez <hector@hecrj.dev>
Date: Wed, 24 Apr 2024 21:29:30 +0200
Subject: Make image `Cache` eviction strategy less aggressive in `iced_wgpu`

Instead of trimming unconditionally at the end of
a frame, we now trim the cache only when there is a
cache miss.

This way, images that are not visible but still a
part of the layout will stay cached. Eviction will
only happen when the images are not a part of the
UI for two consectuive frames.
---
 wgpu/src/image/atlas/allocator.rs | 4 ++++
 wgpu/src/image/atlas/layer.rs     | 8 ++++++++
 2 files changed, 12 insertions(+)

(limited to 'wgpu/src/image/atlas')

diff --git a/wgpu/src/image/atlas/allocator.rs b/wgpu/src/image/atlas/allocator.rs
index 204a5c26..a51ac1f5 100644
--- a/wgpu/src/image/atlas/allocator.rs
+++ b/wgpu/src/image/atlas/allocator.rs
@@ -33,6 +33,10 @@ impl Allocator {
     pub fn is_empty(&self) -> bool {
         self.allocations == 0
     }
+
+    pub fn allocations(&self) -> usize {
+        self.allocations
+    }
 }
 
 pub struct Region {
diff --git a/wgpu/src/image/atlas/layer.rs b/wgpu/src/image/atlas/layer.rs
index cf089601..fd6788d9 100644
--- a/wgpu/src/image/atlas/layer.rs
+++ b/wgpu/src/image/atlas/layer.rs
@@ -11,4 +11,12 @@ impl Layer {
     pub fn is_empty(&self) -> bool {
         matches!(self, Layer::Empty)
     }
+
+    pub fn allocations(&self) -> usize {
+        match self {
+            Layer::Empty => 0,
+            Layer::Busy(allocator) => allocator.allocations(),
+            Layer::Full => 1,
+        }
+    }
 }
-- 
cgit