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Your challenge is to create a text-mode, character-based application
for editing images. The minimum functionality required is the ability
to navigate to an arbitrary pixel in the image, and set the pixel’s
color to an arbitrary RGB value. For extra credit you may wish to
include an alpha channel, a brush tool (with multiple sizes), a clone
stamp tool, a scripting interface, and anything else within or beyond
your wildest dreams.
Some tools that may be of use:
ncurses gem: GitHub - ELLIOTTCABLE/ncurses: ‹ᴜɴᴍᴀɪɴᴛᴀɪɴᴇᴅ› A Ruby module for accessing the ncurses library