Here is a list of all files with brief descriptions:

[detail level 1234]

▼ src
▼ drivers
▼ ssd1306
ssd1306.c
ssd1306.h
ssd1306_defs.h
▼ st7920
st7920.c
st7920.h	Driver for ST7920 display driver. This library needs you to implement interface control, providing the function pointer to library handle the display
st7920_defs.h
GraphicDisplay.c
GraphicDisplay.h	Main header file of Graphic Display Library, here we have the middle layer of the library. Where we works on drawing elements (texts, bitmaps and geometric forms). In drivers folder we have the low layer, composed by display controller drivers. The drivers are independet of the Graphic Display files, you can use them in more advanced libraries, like LVGL. This library is created to be flexible and scalable, allowing the engineer to use any amount of display, of any type
GraphicDisplay_Fonts.c
GraphicDisplay_Fonts.h