From eb5a2ed01f9dd18e8dc01dc202870fa1857236bc Mon Sep 17 00:00:00 2001
From: Tadas Baltrusaitis <tadyla@gmail.com>
Date: Sat, 27 Jan 2018 11:12:00 +0000
Subject: [PATCH] Adding mirror image support.

---
 gui/HeadPose-live/MainWindow.xaml.cs | 11 ++++++-----
 lib/local/CppInerop/OpenCVWrappers.h |  5 +++++
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/gui/HeadPose-live/MainWindow.xaml.cs b/gui/HeadPose-live/MainWindow.xaml.cs
index 4632f50..da63b89 100644
--- a/gui/HeadPose-live/MainWindow.xaml.cs
+++ b/gui/HeadPose-live/MainWindow.xaml.cs
@@ -384,22 +384,23 @@ namespace HeadPoseLive
                 // CAPTURE FRAME AND DETECT LANDMARKS FOLLOWED BY THE REQUIRED IMAGE PROCESSING
                 //////////////////////////////////////////////
 
-                RawImage frame = null;
-                frame = reader.GetNextImage();
+                RawImage frame = reader.GetNextImage();
 
                 lastFrameTime = CurrentTime;
                 processing_fps.AddFrame();
 
                 var grayFrame = reader.GetCurrentFrameGray();
 
-                if (grayFrame == null)
-                    continue;
+                if (mirror_image)
+                { 
+                    frame.Mirror();
+                    grayFrame.Mirror();
+                }
 
                 bool detectionSucceeding = ProcessFrame(face_model, gaze_analyser, model_params, frame, grayFrame, reader.GetFx(), reader.GetFy(), reader.GetCx(), reader.GetCy());
 
                 lock (recording_lock)
                 {
-
                     if (recording)
                     {
                         // Add objects to recording queues
diff --git a/lib/local/CppInerop/OpenCVWrappers.h b/lib/local/CppInerop/OpenCVWrappers.h
index 27c3e9a..d645897 100644
--- a/lib/local/CppInerop/OpenCVWrappers.h
+++ b/lib/local/CppInerop/OpenCVWrappers.h
@@ -136,6 +136,11 @@ namespace OpenCVWrappers {
 			refCount++;
 		}
 
+		void Mirror()
+		{
+			cv::flip(*mat, *mat, 1);
+		}
+
 		// Finalizer. Definitely called before Garbage Collection,
 		// but not automatically called on explicit Dispose().
 		// May be called multiple times.