我正在使用gtkmm 3开发一个简单的OpenCV（v3.1）视频捕获应用程序，现在我正试图通过{{1}将jpg图像加载到DrawingArea将对象转换为Mat。该计划如下：
Cairo::Context当我使用：int main(int argc, char *argv[]){
Gtk::Window* mainWindow;
Gtk::DrawingArea* videoBackground;
auto app = Gtk::Application::create(argc, argv, "com.twallis.OSD");
Mat inImage, outImage;
inImage = cv::imread("blackbackground.jpg", IMREAD_COLOR);
cvtColor(inImage, outImage, CV_BGR2RGB);
/*LOAD WIDGETS FROM BUILDER FILE*/
Glib::RefPtr<Gtk::Builder> builder = Gtk::Builder::create();
try{
builder->add_from_file("OSD_drawing_background1.glade");
}
catch(const Glib::FileError& ex){
std::cerr << "fileError: " << ex.what() << endl;
return 1;
}
catch(const Glib::MarkupError& ex){
std::cerr << "MarkupError: " << ex.what() << endl;
return 1;
}
catch(const Gtk::BuilderError& ex){
std::cerr << "BuilderError " << ex.what() << endl;
return 1;
}
builder->get_widget("mainWindow", mainWindow);
builder->get_widget("videoBackground", videoBackground);
Cairo::RefPtr<Cairo::Context> cairoContext = videoBackground- >get_window()->create_cairo_context();
Gdk::Cairo::set_source_pixbuf(cairoContext, Gdk::Pixbuf::create_from_data(outImage.data, Gdk::COLORSPACE_RGB, false, 8, outImage.cols, outImage.rows, outImage.step));
mainWindow->add(*videoBackground);
videoBackground->queue_draw();
return app->run(*mainWindow); }
我没有收到任何警告，但立即运行该程序会导致段错误。这是为什么？
答案 0 :(得分：0)
if(!outImage.empty()) {
...
}