From 82785b91648eb064f77c605f2eb3551c45c19834 Mon Sep 17 00:00:00 2001
From: Okaniku <61146125+okaniku@users.noreply.github.com>
Date: Thu, 9 Nov 2023 08:31:41 +1100
Subject: [PATCH] Fix ALC_EXT_EFX hack (#1770)

* Fix ALC_EXT_EFX hack

* Fix extension loading test

---------

Co-authored-by: arcraith <arcraith@live.com>
---
 src/OpenAL/Silk.NET.OpenAL.Tests/ExtensionLoadingTests.cs | 8 ++++++++
 src/OpenAL/Silk.NET.OpenAL/AL/AL.cs                       | 6 ++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/OpenAL/Silk.NET.OpenAL.Tests/ExtensionLoadingTests.cs b/src/OpenAL/Silk.NET.OpenAL.Tests/ExtensionLoadingTests.cs
index ea4866f5f6..56cae1c5c9 100644
--- a/src/OpenAL/Silk.NET.OpenAL.Tests/ExtensionLoadingTests.cs
+++ b/src/OpenAL/Silk.NET.OpenAL.Tests/ExtensionLoadingTests.cs
@@ -31,6 +31,12 @@ public ExtensionLoadingTests(ITestOutputHelper testOutputHelper)
     [UnmanagedCallersOnly(CallConvs = new []{typeof(CallConvCdecl)})]
     public static unsafe int AlwaysZero(byte* name) => 0;
 
+    [UnmanagedCallersOnly(CallConvs = new[] { typeof(CallConvCdecl) })]
+    public static unsafe Context* GetCurrentContext() => null;
+
+    [UnmanagedCallersOnly(CallConvs = new[] { typeof(CallConvCdecl) })]
+    public static unsafe Device* GetContextsDevice(Context* ctx) => null;
+
     public unsafe delegate nint LoaderDelegate(byte* name);
     public unsafe delegate nint ContextLoaderDelegate(void* device, byte* name);
     
@@ -51,6 +57,8 @@ public static unsafe Func<string, nint> GetLoader(bool alwaysPresent, out nint l
             "alcIsExtensionPresent" or "alIsExtensionPresent" => alwaysPresent
                 ? (nint) (delegate* unmanaged[Cdecl]<byte*, int>) &AlwaysOne
                 : (nint) (delegate* unmanaged[Cdecl]<byte*, int>) &AlwaysZero,
+            "alcGetCurrentContext" => (nint) (delegate* unmanaged[Cdecl]<Context*>) &GetCurrentContext,
+            "alcGetContextsDevice" => (nint) (delegate* unmanaged[Cdecl]<Context*, Device*>) &GetContextsDevice,
             "alGetProcAddress" => wrapper[0],
             "alcGetProcAddress" => wrapper[1],
             "alGetEnumValue" => (nint) (delegate* unmanaged[Cdecl]<byte*, int>) &AlwaysZero,
diff --git a/src/OpenAL/Silk.NET.OpenAL/AL/AL.cs b/src/OpenAL/Silk.NET.OpenAL/AL/AL.cs
index 2f9049d8ea..275eea7457 100644
--- a/src/OpenAL/Silk.NET.OpenAL/AL/AL.cs
+++ b/src/OpenAL/Silk.NET.OpenAL/AL/AL.cs
@@ -36,8 +36,10 @@ public override unsafe bool IsExtensionPresent(string name)
                 SilkMarshal.StringIntoSpan(name, nameNative, NativeStringEncoding.UTF8);
                 fixed (byte* namePtr = nameNative)
                 {
-                    return ((delegate* unmanaged[Cdecl]<byte*, char>) Context.GetProcAddress("alcIsExtensionPresent"))
-                        (namePtr) == 1;
+                    var currentContext = ((delegate* unmanaged[Cdecl]<Context*>) Context.GetProcAddress("alcGetCurrentContext"))();
+                    var currentDevice = ((delegate* unmanaged[Cdecl]<Context*, Device*>) Context.GetProcAddress("alcGetContextsDevice"))(currentContext);
+                    return ((delegate* unmanaged[Cdecl]<Device*, byte*, char>) Context.GetProcAddress("alcIsExtensionPresent"))
+                        (currentDevice, namePtr) == 1;
                 }
             }