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Each library has the following functions:

oled_init() - This initializes the driver. Pass it your function pointer for sending data to the OLED display and a few other configuration settings.

oled_change_config() - Change the contrast, put the screen into a screen-saver mode,etc

oled_draw_line() - Draw a line. Give it the start\end location.

oled_print_text() - Pass the string to display, starting location,etc

oled_refresh_screen() - To refresh the display.

oled_draw_circle() - Draw a circle. Pass the radius and location.

oled_draw_rectangle() - Draw a rectangle. Pass the location, start\end location.

oled_display_bitmap() - Pass the bitmap data to this function and it will display the bitmap.

oled_get_display_buffer_size() - Used in your application to allocate buffer space.

oled_save_buffer() - Save the screen in your application's memory for later display.

oled_restore_buffer() - Restore a previously stored display.

oled_pixel_set() - Control individual pixels.

oled_invert_screen() - Invert the screen

oled_clear_screen() - Clear the screen

See the library API manual here.

What this library does:

This library handles display memory and provides an easy API for manipulating it.  Specifically, it generates font data and basic graphic routines that would otherwise take hours to generate.  It also interfaces with the display controller to do initialization and appropriate settings.  It facilitates both SPI and parallel access by keeping any application controller hardware calls external, so SPI calls are implemented by the application, not the library.  This gives the benefit of being very flexible.  For questions or discussion, please contact sales@graphicsdriversource.com