From mick at cs.wisc.edu  Wed Jun  4 17:25:22 2014
From: mick at cs.wisc.edu (Mick Charles Beaver)
Date: Wed, 4 Jun 2014 12:25:22 -0500
Subject: [Cl-opengl-devel] trouble running on ms windows
Message-ID: <CAMOgSETK6Twv5qxQjSuXtsbFt2wukHQq8UfqMcZKi=5rjTjH5w@mail.gmail.com>

Hi,

I was poking around with the arcsynthesis GL tutorials and wanted to try
coding them up in Lisp with SDL2. I was able to get the first tutorial
running on Linux, but when I try to run it on Windows, I get an error when
calling gl:create-shader. Specifically, SLIME breaks into:

NIL is not of type (OR SYMBOL
                       FUNCTION), and can't be FUNCALLed or APPLYed
   [Condition of type TYPE-ERROR]

Is there something special that needs to be done for loading extensions on
Windows? The shader-vao sample runs for me, but I can't determine if GLUT
is doing something special or not. I can't wholly rule out that I've done
something silly, so I've attached the source.

-Mick
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From luismbo at gmail.com  Thu Jun  5 21:18:21 2014
From: luismbo at gmail.com (=?UTF-8?Q?Lu=C3=ADs_Oliveira?=)
Date: Thu, 5 Jun 2014 22:18:21 +0100
Subject: [Cl-opengl-devel] trouble running on ms windows
In-Reply-To: <CAMOgSETK6Twv5qxQjSuXtsbFt2wukHQq8UfqMcZKi=5rjTjH5w@mail.gmail.com>
References: <CAMOgSETK6Twv5qxQjSuXtsbFt2wukHQq8UfqMcZKi=5rjTjH5w@mail.gmail.com>
Message-ID: <CAB-HnLTaFc_GYZoUWxkwtpc0PNbXyxSwP2ueKTCyJJdgbtqxsg@mail.gmail.com>

On Wed, Jun 4, 2014 at 6:25 PM, Mick Charles Beaver <mick at cs.wisc.edu> wrote:
> Is there something special that needs to be done for loading extensions on
> Windows? The shader-vao sample runs for me, but I can't determine if GLUT is
> doing something special or not.

This is the special bit that GLUT does:

;; <https://github.com/3b/cl-opengl/blob/master/glut/init.lisp#L60>
(setq %gl:*gl-get-proc-address* 'get-proc-address)

SDL should have something similar to glutGetProcAddress().

HTH,

-- 
Lu?s Oliveira
http://kerno.org/~luis/