Madagascar development blog

Meet gdpen, a new "pen" program. gdpen converts vplot files to PNG or JPEG, or GIF graphics formats (including animated GIFs). Use it like this:

gdpen < file.vpl > file.png

or

gdpen type=jpeg < file.vpl > file.jpg

or

gdpen type=gif < file.vpl > file.gif

Other usual options are available.

gdpen requires the GD library at the compilation time.

Several other "pens" are under development:

• cairopen - for outputting standard vector-graphics formats


• svgpen - for outputting SVG directly


• pdfpen - for outputting PDF directly


• gtkpen/oglpen - for displaying plots on a screen (as a replacement for xtpen)