From: Simon Strandgaard <neoneye@...>
Date: 2004-01-03T09:46:43+09:00
Subject: Re: Embedding Ruby as a plugin (e.g. PhotoShop)

On Thu, 01 Jan 2004 09:47:41 +0900, Glenn Lewis wrote:

> I'm trying to embed Ruby as a plugin to a program called
> Animation:Master (http://www.hash.com/).  Everything compiles
> and links without errors, and my plugin loads into A:M, and
> my file requestor pops up for selecting which script I wish
> to run through the Ruby interpreter.
> 
> After this, though, I can't seem to get Ruby to run.
> 
> If I try this:
> 
>    int myargc = 2;
>    char* myargv[] = { "ruby", "c:/src/hi.rb", 0 };
>    ruby_init();
>    ruby_options(myargc, myargv);
>    ruby_run();  // - crash

Watch out about "ruby_run()".. see:
http://www.rubygarden.org/ruby?RubyApi/RubyRun




> the entire application crashes on the call to ruby_run.
> If, however, I try this:
> 
>    ruby_init();
>    ruby_script("embedded");
>    rb_load_file("c:/src/hi.rb");
>    ruby_run();  // - hangs
> 
> the entire application just hangs... I have to kill it myself.
> 
> Just to test out my sanity, I built a separate executable with
> the above 2 snipits, and each of them worked fine as a stand-alone
> program.
> 
> I've tried linking to C:\ruby\lib\msvcrt-ruby18.lib
> as well as C:\ruby\lib\msvcrt-ruby18-static.lib
> and they behave the same.
> 
> Can anyone think of what I might be doing wrong?
> My e-mail address is: glenn at hometot periodcom
> Thanks!
> 						-- Glenn Lewis
> 
> P.S. Notice how Paint Shop Pro has a python plugin for it?
> It would be cool if someone wrote a Ruby plugin for it.  Thanks.

Great initiative.  BTW: I recommend using SWIG as much as possible.



I have written a tutorial on how to embed Ruby into C++, its located here:
http://aeditor.rubyforge.org/ruby_cplusplus/index.html

First you will need to download this skeleton project, though:
http://raa.ruby-lang.org/list.rhtml?name=rubyembed
It works on unix... no idea if it works on Windows (many has downloaded
but nobody has yet submitted a windows-makefile, you are welcome). 


Just ask if you have any trouble.

--
Simon Strandgaard