From: Tom Copeland <tom@...>
Date: 2005-04-04T23:46:16+09:00
Subject: Re: Extension question

On Mon, 2005-04-04 at 23:19 +0900, Joe Van Dyk wrote:
> Hi,
> 
> I'm generating a fairly large image file (can be 10000x10000) pixels
> by reading some binary data and setting each pixel.  As you can
> imagine, pure Ruby is REALLY slow, I think because of the loops.  I've
> written the program in C and it's literally hundreds to thousands of
> times faster (depending on image size).
> 
> So, I'd like to write my first C extension.  I'm using the GD library
> for image manipulation.

You might be interested in this:

http://raa.ruby-lang.org/list.rhtml?name=ruby-gd

>From the example scripts:

require "GD"
im = GD::Image.new(100,100)
red = im.colorAllocate(255,0,0)
im.rectangle(0,0,99,99,red)
im.png STDOUT

Yours,

tom