REVIEWED: Check OpenGL version required, fix #3457

src/platforms/rcore_desktop_sdl.c

@@ -1145,11 +1145,44 @@ int InitPlatform(void)
     //if ((CORE.Window.flags & FLAG_FULLSCREEN_DESKTOP) > 0) flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
 
     // NOTE: Some OpenGL context attributes must be set before window creation
-
-    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
-    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
-    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
-    //SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_DEBUG_FLAG | SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG);
+    
+    // Check selection OpenGL version
+    if (rlGetVersion() == RL_OPENGL_21)
+    {
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
+    }
+    else if (rlGetVersion() == RL_OPENGL_33)
+    {
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
+#if defined(__APPLE__)
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG);  // OSX Requires forward compatibility
+#else
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
+#endif
+    }
+    else if (rlGetVersion() == RL_OPENGL_43)
+    {
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4);
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
+#if defined(RLGL_ENABLE_OPENGL_DEBUG_CONTEXT)
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_DEBUG_FLAG);   // Enable OpenGL Debug Context
+#endif
+    }
+    else if (rlGetVersion() == RL_OPENGL_ES_20)                 // Request OpenGL ES 2.0 context
+    {
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
+    }
+    else if (rlGetVersion() == RL_OPENGL_ES_30)                 // Request OpenGL ES 3.0 context
+    {
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
+    }
 
     if (CORE.Window.flags & FLAG_VSYNC_HINT)
     {