From 0366de36ce828294df877f15c7cf628cab5e6704 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Tue, 7 Feb 2023 14:13:02 +0100
Subject: [PATCH] Add `BlurScaleWithSize` to `BlurPanel` for
 resolution-independent blur

---
 Source/Engine/UI/GUI/Panels/BlurPanel.cs | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/Source/Engine/UI/GUI/Panels/BlurPanel.cs b/Source/Engine/UI/GUI/Panels/BlurPanel.cs
index 8d4525113..0fe506e44 100644
--- a/Source/Engine/UI/GUI/Panels/BlurPanel.cs
+++ b/Source/Engine/UI/GUI/Panels/BlurPanel.cs
@@ -11,9 +11,15 @@ namespace FlaxEngine.GUI
         /// <summary>
         /// Gets or sets the blur strength. Defines how blurry the background is. Larger numbers increase blur, resulting in a larger runtime cost on the GPU.
         /// </summary>
-        [EditorOrder(0), Limit(0, 100, 0.0f), Tooltip("Blur strength defines how blurry the background is. Larger numbers increase blur, resulting in a larger runtime cost on the GPU.")]
+        [EditorOrder(0), Limit(0, 100, 0.0f)]
         public float BlurStrength { get; set; }
 
+        /// <summary>
+        /// If checked, the blur strength will be scaled with the control size, which makes it resolution-independent.
+        /// </summary>
+        [EditorOrder(10)]
+        public bool BlurScaleWithSize { get; set; } = false;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="BlurPanel"/> class.
         /// </summary>
@@ -27,10 +33,13 @@ namespace FlaxEngine.GUI
         {
             base.Draw();
 
-            float strength = BlurStrength;
+            var size = Size;
+            var strength = BlurStrength;
+            if (BlurScaleWithSize)
+                strength *= size.MinValue / 1000.0f;
             if (strength > Mathf.Epsilon)
             {
-                Render2D.DrawBlur(new Rectangle(Float2.Zero, Size), strength);
+                Render2D.DrawBlur(new Rectangle(Float2.Zero, size), strength);
             }
         }
     }