Load GUI from XML

ImageProvider.cc

@@ -0,0 +1,33 @@
+#include <SDL2/SDL_image.h>
+
+#include "ImageProvider.hh"
+
+template<>
+std::unique_ptr<ImageProvider> Singleton<ImageProvider>::instance{nullptr};
+
+template<>
+std::once_flag Singleton<ImageProvider>::instance_flag{};
+
+ImageProvider::ImageProvider()
+{
+}
+
+SDL_Surface *ImageProvider::getImage(std::string const& name)
+{
+  auto it = imageCache_.find(name);
+
+  if(it == imageCache_.end()) {
+    SDLSurfaceUPtr image{IMG_Load(name.c_str())};
+    if (!image)
+      throw SDLException{};
+    tie(it, std::ignore) = imageCache_.insert(make_pair(name, std::move(image)));
+  }
+
+  return it->second.get();
+}
+
+
+void ImageProvider::cleanup()
+{
+  imageCache_.clear();
+}