The Adafruit_GFX library for Arduino provides a common syntax and
set of graphics functions for all of our TFT, LCD and OLED displays. This
allows Arduino sketches to easily be adapted between display types with
minimal fuss…and any new features, performance improvements and bug
fixes will immediately apply across our complete offering of color
The GFX library is what lets you draw points, lines, rectangles, round-rects, triangles, text, etc.
Last updated on May 04, 2015
Published on Mar 18, 2014
Check out our detailed tutorial here http://learn.adafruit.com/adafruit-gfx-graphics-library
It covers the latest and greatest of the GFX library. The GFX library is used in both 8-bit and SPI modes so the underlying commands (drawLine() for example) are identical!