egl: Add function: meta_egl_query_string

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3304>

src/backends/meta-egl.c

@@ -260,6 +260,14 @@ meta_egl_has_extensions (MetaEgl      *egl,
   return has_extensions;
 }
 
+const char *
+meta_egl_query_string (MetaEgl    *egl,
+                       EGLDisplay  display,
+                       EGLint      name)
+{
+  return eglQueryString (display, name);
+}
+
 gboolean
 meta_egl_initialize (MetaEgl   *egl,
                      EGLDisplay display,

src/backends/meta-egl.h

@@ -47,6 +47,10 @@ gboolean meta_egl_has_extensions (MetaEgl      *egl,
                                   const char   *first_extension,
                                   ...);
 
+const char * meta_egl_query_string (MetaEgl    *egl,
+                                    EGLDisplay  display,
+                                    EGLint      name);
+
 gboolean meta_egl_initialize (MetaEgl   *egl,
                               EGLDisplay display,
                               GError   **error);