forth-sixel | terminal raster graphics and gui's in forth

This is useful for gui's and graphics over a uart from a microcontroller without a separate display or extra supporting (gtk, qt) software on the host. An oscope gui for a microcontroller ADC for instance.

usage

XTerm with --enable-dec-locator --enable-sixel-graphics --with-terminal-id=VT340 configure option:

xterm -ti 340 -e gforth paint.4th

roadmap

• DONE run-length encoding of framebuffer for faster display over slow uart or radio link.
• TODO colors
• TODO lines, circles, ellipses, and Bézier curves: http://members.chello.at/~easyfilter/bresenham.html
• TODO signed-distance functions: https://github.com/flagxor/sdf http://jamie-wong.com/2016/07/15/ray-marching-signed-distance-functions/ http://iquilezles.org/www/articles/distfunctions/distfunctions.htm
• TODO composable ( forthy) gui words?...

references

• All About SIXELs
• VT330/VT340 Programmer Reference Manual Volume 2: Graphics Programming

contact

I'm Andreas Bernhard Wagner, my name is pointfree on freenode and reddit. My email is andreas.wagner@lowfatcomputing.org