From ea3ed7e31d02551530af2739da88226b9fb63620 Mon Sep 17 00:00:00 2001
From: extio-de <github@extio.de>
Date: Wed, 17 Jun 2026 14:33:10 +0200
Subject: [PATCH] feat(G2DDrawFont): implement caching for TextLayout to
 improve performance chore(pom.xml): bump version to 1.0.21 and add Caffeine
 cache dependency

---
 pom.xml                                       |  6 +++++-
 .../g2d/bo/rendering/G2DDrawFont.java         | 20 +++++++++++++++++--
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/pom.xml b/pom.xml
index 7b8aaaa..e88b8b9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>de.extio</groupId>
     <artifactId>game-engine</artifactId>
-    <version>1.0.20</version>
+    <version>1.0.21</version>
 
     <properties>
         <java.version>25</java.version>
@@ -39,6 +39,10 @@
             <artifactId>spring-boot-starter-jackson</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>com.github.ben-manes.caffeine</groupId>
+            <artifactId>caffeine</artifactId>
+        </dependency>
         <dependency>
             <groupId>com.github.luben</groupId>
             <artifactId>zstd-jni</artifactId>
diff --git a/src/main/java/de/extio/game_engine/renderer/g2d/bo/rendering/G2DDrawFont.java b/src/main/java/de/extio/game_engine/renderer/g2d/bo/rendering/G2DDrawFont.java
index 97db77c..c31972a 100644
--- a/src/main/java/de/extio/game_engine/renderer/g2d/bo/rendering/G2DDrawFont.java
+++ b/src/main/java/de/extio/game_engine/renderer/g2d/bo/rendering/G2DDrawFont.java
@@ -8,10 +8,15 @@ import java.awt.Shape;
 import java.awt.font.TextAttribute;
 import java.awt.font.TextLayout;
 import java.text.AttributedString;
+import java.time.Duration;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicReference;
 
+import com.github.benmanes.caffeine.cache.Cache;
+import com.github.benmanes.caffeine.cache.Caffeine;
+import com.github.benmanes.caffeine.cache.LoadingCache;
+
 import de.extio.game_engine.renderer.model.RenderingBo;
 import de.extio.game_engine.renderer.model.RenderingBoLayer;
 import de.extio.game_engine.renderer.model.bo.DrawFontRenderingBo;
@@ -37,6 +42,11 @@ public class G2DDrawFont extends G2DAbstractRenderingBo implements DrawFontRende
 	private static final AtomicReference<Font> cachedFallbackFontRef = new AtomicReference<>();
 	
 	private static Font baseFont;
+
+	private static final Cache<TextLayoutParameters, TextLayout> textLayoutCache = Caffeine.newBuilder()
+			.maximumSize(250)
+			.expireAfterAccess(Duration.ofMinutes(1))
+			.build();
 	
 	static {
 		final Map<TextAttribute, Object> attributes = new HashMap<>();
@@ -250,8 +260,11 @@ public class G2DDrawFont extends G2DAbstractRenderingBo implements DrawFontRende
 	}
 	
 	private static TextLayout createTextLayout(final String text, final Graphics graphics, final int size_, final double scaleFactor) {
-		final var attributedString = createAttributedString(text, size_, scaleFactor);
-		return new TextLayout(attributedString.getIterator(), ((Graphics2D) graphics).getFontRenderContext());
+		final var cacheKey = new TextLayoutParameters(text, size_, scaleFactor);
+		return textLayoutCache.get(cacheKey, key -> {
+			final var attributedString = createAttributedString(key.text, key.size_, key.scaleFactor);
+			return new TextLayout(attributedString.getIterator(), ((Graphics2D) graphics).getFontRenderContext());
+		});
 	}
 	
 	private static AttributedString createAttributedString(final String text, final int size_, final double scaleFactor) {
@@ -276,5 +289,8 @@ public class G2DDrawFont extends G2DAbstractRenderingBo implements DrawFontRende
 		}
 		return attributedString;
 	}
+
+	private record TextLayoutParameters(String text, int size_, double scaleFactor) {
+	}
 	
 }