From 5ed21bb2eae192fc7cde75a2f59827dd238eb754 Mon Sep 17 00:00:00 2001
From: Pavel Rojtberg <pavel.rojtberg@igd.fraunhofer.de>
Date: Thu, 14 Mar 2019 14:42:54 +0100
Subject: [PATCH] ovis: document the supported environment variables

---
 modules/ovis/include/opencv2/ovis.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/ovis/include/opencv2/ovis.hpp b/modules/ovis/include/opencv2/ovis.hpp
index 5e5db358d..473946fa0 100644
--- a/modules/ovis/include/opencv2/ovis.hpp
+++ b/modules/ovis/include/opencv2/ovis.hpp
@@ -248,6 +248,11 @@ CV_EXPORTS_W void addResourceLocation(const String& path);
  * @param title window title
  * @param size size of the window
  * @param flags a combination of @ref SceneSettings
+ *
+ * Furthermore, the behavior is controlled by the following environment variables
+ * - OPENCV_OVIS_VERBOSE_LOG: print all of OGRE log output
+ * - OPENCV_OVIS_RENDERSYSTEM: the name of the OGRE RenderSystem to use
+ * - OPENCV_OVIS_NOVSYNC: disable VSYNC for all windows
  */
 CV_EXPORTS_W Ptr<WindowScene> createWindow(const String& title, const Size& size,
                                            int flags = SCENE_INTERACTIVE | SCENE_AA);