From fe46a32eba1213bb4f95cead282dfb0d7bc890d1 Mon Sep 17 00:00:00 2001
From: Cilly Leang <me@lava.moe>
Date: Sat, 31 Jan 2026 14:55:36 +1100
Subject: [PATCH] feat(ui/jvm): support system scaling

---
 ui/src/jvmMain/kotlin/moe/lava/neon/main.kt | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/ui/src/jvmMain/kotlin/moe/lava/neon/main.kt b/ui/src/jvmMain/kotlin/moe/lava/neon/main.kt
index 27c77b5..0db2ea1 100644
--- a/ui/src/jvmMain/kotlin/moe/lava/neon/main.kt
+++ b/ui/src/jvmMain/kotlin/moe/lava/neon/main.kt
@@ -1,14 +1,29 @@
 package moe.lava.neon
 
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.unit.Density
 import androidx.compose.ui.window.Window
 import androidx.compose.ui.window.application
 import moe.lava.neon.ui.App
 
+// The UI is designed with touchscreens in mind; on desktop elements may look gigantic
+// So scale them down a bit
+const val scaleFactor = 0.75f
+
 fun main() = application {
     Window(
         onCloseRequest = ::exitApplication,
         title = "Neon",
     ) {
-        App()
+        val systemScale = System.getenv("GDK_SCALE")?.toFloatOrNull() ?: 1f
+        val systemDpiScale = System.getenv("GDK_DPI_SCALE")?.toFloatOrNull() ?: 1f
+        val density = Density(
+            density = LocalDensity.current.density * systemScale * scaleFactor,
+            fontScale = systemDpiScale
+        )
+        CompositionLocalProvider(LocalDensity provides density) {
+            App()
+        }
     }
 }