From 8e8d5b2fe03b40ec8cbddbbf03b952f2a743c7d6 Mon Sep 17 00:00:00 2001
From: "konstantin.matveyev" <konstantin.matveyev@eligovision.ru>
Date: Mon, 14 Aug 2017 11:19:04 +0300
Subject: [PATCH] Emscripten: EGL instead of SDL2 in GLExtensions.cpp

---
 src/osg/GLExtensions.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/osg/GLExtensions.cpp b/src/osg/GLExtensions.cpp
index 786cc6f8d..d89e63907 100644
--- a/src/osg/GLExtensions.cpp
+++ b/src/osg/GLExtensions.cpp
@@ -48,8 +48,8 @@
         #include <dlfcn.h>
     #endif
 #elif defined(__EMSCRIPTEN__)
-    // Emscripten ships SDL, which we use to get OpenGL function addresses.
-    #include <SDL2/SDL.h>
+    // Emscripten ships EGL, which we use to get OpenGL function addresses.
+    #include <EGL/egl.h>
 #else
     #include <dlfcn.h>
 #endif
@@ -411,8 +411,8 @@ OSG_INIT_SINGLETON_PROXY(GLExtensionDisableStringInitializationProxy, osg::getGL
         return dlsym(RTLD_DEFAULT, funcName);
 
     #elif defined(__EMSCRIPTEN__)
-        // Use SDL to get OpenGL function address for Emscripten.
-        return SDL_GL_GetProcAddress(funcName);
+        // Use EGL to get OpenGL function address for Emscripten.
+        return convertPointerType<void*, __eglMustCastToProperFunctionPointerType>(eglGetProcAddress(funcName));
 
     #else // all other unixes