From 7cd5d339e52b1c77a1d97c322fabc65f4e5e7c65 Mon Sep 17 00:00:00 2001
From: Andrej Benedik <abenedik@ab4d.com>
Date: Fri, 20 Mar 2026 13:05:48 +0100
Subject: [PATCH] Fixed creating RenderTarget when using Vulkan backend
 (#20952)

* Updated VulkanContext.TryGetFeature to also provide IVulkanKhrSurfacePlatformSurfaceFactory
This also fixed creating new RenderTarget when using Vulkan backend, see issue #20824

* Prevent duplicate check if _renderTarget is null
---
 .../Composition/Server/ServerCompositionTarget.cs    | 12 ++++++++----
 src/Avalonia.Vulkan/VulkanContext.cs                 |  6 +++++-
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/src/Avalonia.Base/Rendering/Composition/Server/ServerCompositionTarget.cs b/src/Avalonia.Base/Rendering/Composition/Server/ServerCompositionTarget.cs
index 81a3c09b35..e8ae84eb03 100644
--- a/src/Avalonia.Base/Rendering/Composition/Server/ServerCompositionTarget.cs
+++ b/src/Avalonia.Base/Rendering/Composition/Server/ServerCompositionTarget.cs
@@ -149,12 +149,16 @@ namespace Avalonia.Rendering.Composition.Server
 
             try
             {
-                if (_renderTarget == null && !_compositor.IsReadyToCreateRenderTarget(_surfaces()))
+                if (_renderTarget == null)
                 {
-                    IsWaitingForReadyRenderTarget = IsEnabled;
-                    return;
+                    if (!_compositor.IsReadyToCreateRenderTarget(_surfaces()))
+                    {
+                        IsWaitingForReadyRenderTarget = IsEnabled;
+                        return;
+                    }
+
+                    _renderTarget = _compositor.CreateRenderTarget(_surfaces());
                 }
-                _renderTarget ??= _compositor.CreateRenderTarget(_surfaces());
             }
             catch (RenderTargetNotReadyException)
             {
diff --git a/src/Avalonia.Vulkan/VulkanContext.cs b/src/Avalonia.Vulkan/VulkanContext.cs
index 6667055e8c..8691e55a05 100644
--- a/src/Avalonia.Vulkan/VulkanContext.cs
+++ b/src/Avalonia.Vulkan/VulkanContext.cs
@@ -41,6 +41,10 @@ internal class VulkanContext : IVulkanPlatformGraphicsContext
     {
         if (featureType == typeof(IVulkanContextExternalObjectsFeature))
             return _externalObjectsFeature;
+                
+        if (featureType == typeof(IVulkanKhrSurfacePlatformSurfaceFactory))
+            return _surfaceFactory;
+
         return null;
     }
 
@@ -71,4 +75,4 @@ internal class VulkanContext : IVulkanPlatformGraphicsContext
 
         throw new VulkanException("Unable to find a suitable platform surface");
     }
-}
\ No newline at end of file
+}