Develop a simple QT tool for rendering fonts [Urgent Job]

I want a QT tool for rendering font. It could be a command line tool including three input: a config file including the texts to be rendered, a path spcifying while the otf files (fonts) are placed, and the spacing. The function of tool is to render the list of texts using given fonts, with the spcified spacing between characters (letters) I have a basic python tool for this. The python tool already implements the function of rendering the list of texts using given fonts. But the spacing cannot be adjusted. That could be a useful reference for you. However, I do not think python can control the spacing between letters. Note it is different from adding pixels between letters, considering for example, ligature ([login to view URL]) However in QT, task could be easier. There are functions explicitly do that. Check [login to view URL], and [login to view URL] In all, I need a simple QT tool implementing font rendering with variable spacing. It could be a command-line tool. Please compile it (makefile) in Mac.