For dxf, you can use LibreCAD v2 plugins, and v3 script support.
Or have a look at our dxf2pdf and dxf2png implementation, to develop your own data processing in c++
JiaXinHuang wrote
Please help me, I need to read and write CAD file data, but I don't need UI/QT functionality. Does LibreCAD meet these requirements, or is there another tool that does so.