AAlib-Ruby brings graphics to the text terminal. AAlib-Ruby provides both a graphics context rendered as ascii-art and keyboard and mouse input. AAlib-Ruby supports a number of text-only display drivers such as Curses, SLang, and X11.
This is a DL based wrapper around the AA-lib C library. C struct alignment issues may cause problems on certain platforms when accessing variables of some objects.
Patrick Mahoney (email@example.com)
Copyright © 2007 Patrick Mahoney
Distributes under the same terms as Ruby
First, AA-lib must be initialized with AAlib.init or AAlib.autoinit, returning an AAlib::Context. Two buffers are maintained: the image buffer and the text buffer. AAlib::Context#putpixel is the primary method to draw on the image buffer. AAlib::Context#render converts the image buffer to text, writing the result to the text buffer. Text may be written directly to the text buffer using AAlib::Context#puts and similar. Note that text written this way may be overwritten after a call to AAlib::Context#render. Finally, AAlib::Context#flush writes the text buffer to the screen.
require 'aalib' hp = ::. rp = ::. .(hp, rp) or abort . aa = .(hp) or abort "failed to initialize AA-lib" begin aa.autoinitkbd # set up keyboard support # Fill screen with diagonal gradient width = aa.imgwidth height = aa.imgheight height.times do |y| width.times do |x| aa.putpixel(x, y, 127*(x.to_f/width) + 127*(y.to_f/height)) end end rp.randomval = 25 aa.render(rp) msg = ' AA-lib: the ascii-art library ' blank = ' ' * msg.size attr = :::: col = (aa.scrwidth - msg.size)/2 row = aa.scrheight/2 aa.puts(col, row - 1, attr, blank) aa.puts(col, row, attr, msg) aa.puts(col, row + 1, attr, blank) aa.flush aa.getkey # wait for any key to exit ensure aa.close end