ui/sdl2: OpenGL window context

When OpenGL is enabled, create only the OpenGL context, ignoring the SDL
renderer as it is unused anyway.

Signed-off-by: Antonio Caggiano <quic_acaggian@quicinc.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230612091959.2983-1-quic_acaggian@quicinc.com>

ui/sdl2.c

@@ -113,11 +113,11 @@ void sdl2_window_create(struct sdl2_console *scon)
 
         SDL_SetHint(SDL_HINT_RENDER_DRIVER, driver);
         SDL_SetHint(SDL_HINT_RENDER_BATCHING, "1");
-    }
-    scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
 
-    if (scon->opengl) {
         scon->winctx = SDL_GL_CreateContext(scon->real_window);
+    } else {
+        /* The SDL renderer is only used by sdl2-2D, when OpenGL is disabled */
+        scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
     }
     sdl_update_caption(scon);
 }
@@ -128,10 +128,14 @@ void sdl2_window_destroy(struct sdl2_console *scon)
         return;
     }
 
-    SDL_GL_DeleteContext(scon->winctx);
-    scon->winctx = NULL;
-    SDL_DestroyRenderer(scon->real_renderer);
-    scon->real_renderer = NULL;
+    if (scon->winctx) {
+        SDL_GL_DeleteContext(scon->winctx);
+        scon->winctx = NULL;
+    }
+    if (scon->real_renderer) {
+        SDL_DestroyRenderer(scon->real_renderer);
+        scon->real_renderer = NULL;
+    }
     SDL_DestroyWindow(scon->real_window);
     scon->real_window = NULL;
 }