From 6499bbd4dc11ef4046b861de3418b7a66ae5b87c Mon Sep 17 00:00:00 2001
From: Max Katz <maxkatz6@outlook.com>
Date: Fri, 30 Jun 2023 17:06:07 -0400
Subject: [PATCH] Throw if methods were not found

---
 src/Skia/Avalonia.Skia/Gpu/Metal/SkiaMetalApi.cs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/Skia/Avalonia.Skia/Gpu/Metal/SkiaMetalApi.cs b/src/Skia/Avalonia.Skia/Gpu/Metal/SkiaMetalApi.cs
index e133e3dcde..3022f92ec5 100644
--- a/src/Skia/Avalonia.Skia/Gpu/Metal/SkiaMetalApi.cs
+++ b/src/Skia/Avalonia.Skia/Gpu/Metal/SkiaMetalApi.cs
@@ -35,12 +35,22 @@ internal unsafe class SkiaMetalApi
             _gr_direct_context_make_metal_with_options =
                 (delegate* unmanaged[Stdcall] <IntPtr, IntPtr, IntPtr, IntPtr>)address;
         }
+        else
+        {
+            throw new InvalidOperationException(
+                "Unable to export gr_direct_context_make_metal_with_options. Make sure SkiaSharp is up to date.");
+        }
 
         if(NativeLibraryEx.TryGetExport(dll, "gr_backendrendertarget_new_metal", out address))
         {
             _gr_backendrendertarget_new_metal =
                 (delegate* unmanaged[Stdcall]<int, int, int, GRMtlTextureInfoNative*, IntPtr>)address;
         }
+        else
+        {
+            throw new InvalidOperationException(
+                "Unable to export gr_backendrendertarget_new_metal. Make sure SkiaSharp is up to date.");
+        }
 
         _contextCtor = typeof(GRContext).GetConstructor(
             BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null,