Evas is part of Enlightenment DR17 foundation libraries.

Evas is a hardware-accelerated canvas API for X-Windows that can draw
anti-aliased text, smooth super and sub-sampled images, alpha-blend,
as well as drop down to using normal X11 primitives such as pixmaps,
lines and rectangles for speed if your CPU or graphics hardware are
too slow.

Requires: eina, available at SlackBuilds.org.