newlispfanclub.alh.net

Hi Guys!

I'm currently working part-time on a visual search project written in newLISP. Now it's time to scale some images.

Does anyone have experiences in accessing GDLib or ImageMagick?
A full example including picture upload, scaling and saving to disk would be great. :-)

Thanks so much!
Hilti

Is Dragonfly the newLISP equivalent of Ruby on Rails? Is your template system based on HAML/YAML?

Hi Ted!

Dragonfly is a web framework for newLISP, although not as "magical" as Ruby on Rails. Template markup languages like HAML aren't currently supported.

The templating system is pretty basic, e.g.

To answer your original question, so far I've used imagemagic using (exec) to use the commandline utilities. I never got much traction with the C libraries themselves, so haven't made any newlisp modules for them. I agree, it would be very nice to have such modules.

Instead of HAML, what if we used HNML? It is a sort of pun; instead of being pronounced "hamel", it would be "hanimal". It would execute newlisp instead of ruby code. But also, instead of python indentation, it would use sexps. Or something sexp-ish.

And I have to know; I have seen some similar concepts in dragonfly and RoR. Was dragonfly inspired a lot by Ruby on Rails, or just a little bit?

Dragonfly was inspired by different frameworks we've (Greg and I) came across in the last years.

Here's my short bio from http://www.rundragonfly.com/about ;-)

Marc Hildmann is a web developer since 1998, started writing apps in pure PHP, tried a little bit Ruby on Rails, experimented with some PHP Frameworks like Codeigniter and finally discovered newLISP. He's interested in retro-computing, especially the first XEROX machines and the good old SGI Indy.

But one last thing:
Deployment in Dragonfly is much easier than in Rails. ;-)
Rails Deployment is pain. Really pain.

TedWalther wrote:To answer your original question, so far I've used imagemagic using (exec) to use the commandline utilities.

That's the way I do it right now, too. Feels a bit unreliable to me.

How Do I start in writing C-Bindings for imagemagick - I didn't find any docs about it?!

There is a chapter about importing C-library functions in the CodePatterns document:

http://www.newlisp.org/downloads/CodePa ... tml#toc-23

And shorter documentation in the Users Manual and Reference:

http://www.newlisp.org/downloads/newlis ... _libraries

... each of the functions in that list says something which could be important when importing C-library functions.

There are also several standard modules using C-libraries:

http://www.newlisp.org/code/modules/crypto.lsp.html

http://www.newlisp.org/code/modules/gmp.lsp.html

http://www.newlisp.org/code/modules/mysql.lsp.html

http://www.newlisp.org/code/modules/odbc.lsp.html

http://www.newlisp.org/code/modules/postgres.lsp.html

http://www.newlisp.org/code/modules/sqlite3.lsp.html

http://www.newlisp.org/code/modules/unix.lsp.html

http://www.newlisp.org/code/modules/zlib.lsp.html

... reading and understanding relevant code is always a big help.


An OpenGL example (has callbacks!)

http://www.newlisp.org/syntax.cgi?downl ... mo-lsp.txt

For ImageMagic and GD you would need the developer docs for C-programmers, to see how functions are called, what data types they take, etc.

You definitely need to know how to program in C or get somebody to help you, who knows.