From 641fc8c776bad4b39d0afa11d40954ca3d28ddaf Mon Sep 17 00:00:00 2001
From: tux3 <barrdetwix@gmail.com>
Date: Wed, 4 Mar 2015 22:13:42 +0100
Subject: [PATCH] Catch OpenCV errors

Should help with #1240
---
 src/main.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index be266c6d1..331f8e012 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -30,6 +30,7 @@
 #include <QFontDatabase>
 #include <QMutexLocker>
 #include <QProcess>
+#include <opencv2/core/core.hpp>
 
 #include <sodium.h>
 
@@ -61,6 +62,14 @@ void myMessageHandler(QtMsgType type, const QMessageLogContext& ctxt, const QStr
 }
 #endif
 
+int opencvErrorHandler(int status, const char* func_name, const char* err_msg,
+                   const char* file_name, int line, void*)
+{
+    qWarning() << "OpenCV: ERROR ("<<status<<") in "
+               <<file_name<<":"<<line<<":"<<func_name<<": "<<err_msg;
+    return 0;
+}
+
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
@@ -128,6 +137,8 @@ int main(int argc, char *argv[])
     qDebug() << "built on: " << __TIME__ << __DATE__ << "(" << TIMESTAMP << ")";
     qDebug() << "commit: " << GIT_VERSION << "\n";
 
+    cv::redirectError(opencvErrorHandler);
+
 #ifdef Q_OS_MACX
     if (qApp->applicationDirPath() != "/Applications/qtox.app/Contents/MacOS") {
         qDebug() << "OS X: Not in Applications folder";