From 6b57e08bb0078c9834889eab871bac2368198c15 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Camilla=20L=C3=B6wy?= <elmindreda@elmindreda.org>
Date: Mon, 15 Aug 2022 23:29:10 +0200
Subject: [PATCH] Check if context creation APIs match when sharing

---
 src/context.c | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/src/context.c b/src/context.c
index 7e0449b4..33b399c9 100644
--- a/src/context.c
+++ b/src/context.c
@@ -48,16 +48,6 @@
 //
 GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
 {
-    if (ctxconfig->share)
-    {
-        if (ctxconfig->client == GLFW_NO_API ||
-            ctxconfig->share->context.client == GLFW_NO_API)
-        {
-            _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
-            return GLFW_FALSE;
-        }
-    }
-
     if (ctxconfig->source != GLFW_NATIVE_CONTEXT_API &&
         ctxconfig->source != GLFW_EGL_CONTEXT_API &&
         ctxconfig->source != GLFW_OSMESA_CONTEXT_API)
@@ -78,6 +68,23 @@ GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
         return GLFW_FALSE;
     }
 
+    if (ctxconfig->share)
+    {
+        if (ctxconfig->client == GLFW_NO_API ||
+            ctxconfig->share->context.client == GLFW_NO_API)
+        {
+            _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
+            return GLFW_FALSE;
+        }
+
+        if (ctxconfig->source != ctxconfig->share->context.source)
+        {
+            _glfwInputError(GLFW_INVALID_ENUM,
+                            "Context creation APIs do not match between contexts");
+            return GLFW_FALSE;
+        }
+    }
+
     if (ctxconfig->client == GLFW_OPENGL_API)
     {
         if ((ctxconfig->major < 1 || ctxconfig->minor < 0) ||