From 7501f1846bcf184a41e9ee0750d60424e690e258 Mon Sep 17 00:00:00 2001
From: gdzhu <guodong.zhu@hotmail.com>
Date: Thu, 26 Aug 2021 05:40:58 +0100
Subject: [PATCH] skip overlay processing when no overlay is specified

---
 src/main.cpp     | 7 ++++++-
 src/mainwindow.h | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index accc571..bee35bc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -138,9 +138,14 @@ int main(int argc, char *argv[])
     std::cout << "Rotation Time: " << rotationSeconds << std::endl;
     std::cout << "Overlay input: " << overlay << std::endl;
   }
+
   Overlay o(overlay);
   o.setDebugMode(debugMode);
-  w.setOverlay(&o);
+  if (!overlay.empty())
+  {
+    w.setOverlay(&o);
+  }
+
   w.setAspect(aspect);
   w.setDebugMode(debugMode);
   w.setFitAspectAxisToWindow(fitAspectAxisToWindow);
diff --git a/src/mainwindow.h b/src/mainwindow.h
index 42eaa04..1ee9a94 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -39,7 +39,7 @@ private:
     bool debugMode = false;
     bool fitAspectAxisToWindow = false;
 
-    Overlay* overlay;
+    Overlay* overlay = NULL;
 
     void drawText(QPixmap& image, int margin, int fontsize, QString text, int alignment);