The QFile class provides an interface for reading from and writing to files.| doc.qt.io
The QDir class provides access to directory structures and their contents.| doc.qt.io
A platform-independent mechanism for shipping resource files in an application.| doc.qt.io
The QImage class provides a hardware-independent image representation that allows direct access to the pixel data, and can be used as a paint device.| doc.qt.io
The QPixmap class is an off-screen image representation that can be used as a paint device.| doc.qt.io