From d00ab43ea6654ad057043154a2287bccb0e43ef4 Mon Sep 17 00:00:00 2001
From: Chris Thrasher <chrisjthrasher@gmail.com>
Date: Tue, 2 Apr 2024 18:09:10 -0600
Subject: [PATCH] Return `nullptr` when `sf::Context::getFunction` is called on
 Windows without an active context

This converts termination in Debug and a SEGFAULT in Release builds
into defined behavior.
---
 include/SFML/Window/Context.hpp      | 3 +++
 src/SFML/Window/Win32/WglContext.cpp | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/SFML/Window/Context.hpp b/include/SFML/Window/Context.hpp
index ca1befeb0..1457eab01 100644
--- a/include/SFML/Window/Context.hpp
+++ b/include/SFML/Window/Context.hpp
@@ -131,6 +131,9 @@ public:
     ////////////////////////////////////////////////////////////
     /// \brief Get the address of an OpenGL function
     ///
+    /// On Windows when not using OpenGL ES, a context must be
+    /// active for this function to succeed.
+    ///
     /// \param name Name of the function to get the address of
     ///
     /// \return Address of the OpenGL function, 0 on failure
diff --git a/src/SFML/Window/Win32/WglContext.cpp b/src/SFML/Window/Win32/WglContext.cpp
index 357a74f7e..5eabc4a5b 100644
--- a/src/SFML/Window/Win32/WglContext.cpp
+++ b/src/SFML/Window/Win32/WglContext.cpp
@@ -203,8 +203,8 @@ WglContext::~WglContext()
 ////////////////////////////////////////////////////////////
 GlFunctionPointer WglContext::getFunction(const char* name)
 {
-    assert(WglContextImpl::currentContext != nullptr &&
-           "Current WGL context cannot be null. Call WglContext::makeCurrent() to initialize it.");
+    if (WglContextImpl::currentContext == nullptr)
+        return nullptr;
 
     // If we are using the generic GDI implementation, skip to loading directly from OpenGL32.dll since it doesn't support extensions
     if (!WglContextImpl::currentContext->m_isGeneric)