It is necessary to properly initialize the icon loader in all case. Otherwise some calls might give wrong results if a platform theme plugin is involved. For instance, we might miss the actual theme name reported by the platform theme, eg it's what happen with QStyle::standardPixmap if no one created a QIcon before its first call. Also clean up the accesses to the global static and have only QIconLoader::instance() use it. All other call go through the static method. This way only instance() needs to call ensureInitialized(), definitely safer and looks cleaner to me. Change-Id: Id3ea6816edd5a65586004f69464960abc3602cf8 Reviewed-by: Olivier Goffart <ogoffart@woboq.com>