From: "Stephan Kämper" <Stephan.Kaemper@...>
Date: 2004-11-17T01:58:21+09:00
Subject: Re: image creation

Martin Pirker wrote:
> Hi...
> 
> Im pondering how to best create an image from a Ruby script.
> 1) a x*y size String comes to mind
>    easy manipulation
> 2) dump it out to a .pgm file
> 3) call pgm2jpg, pgm2png or something like that
> 4) serve link to file
> 
> For small images a "keep in memory" and call libjpg directly approach
> comes to mind, for large images maybe via mmap?
> 
> Anyone ever did such things, pointer to example code?

When I did some image manipulation I used RMagick/ImageMagick.
http://rmagick.rubyforge.org/index.html
http://www.imagemagick.org/index.html?

I had some very plain text files, with y lines and x characters in each 
line. The chars where limited to single letters indicating red, blue, 
green, white, black etc. colours.

Stephan