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Date:	Tue, 12 Oct 2004 14:10:00 -0500
From:	Brian Ford <ford AT vss DOT fsi DOT com>
Reply-To:	cygwin AT cygwin DOT com
To:	"John P. Sutter" <sutter AT spring8 DOT or DOT jp>
cc:	cygwin AT cygwin DOT com
Subject:	RE: FW: question about cygwin OpenGL
In-Reply-To:	<000001c4affd$30482e40$d47f0a0a@JPSutter>
Message-ID:	<Pine.CYG.4.58.0410121303210.1048@fordpc.vss.fsi.com>
References:	<000001c4affd$30482e40$d47f0a0a AT JPSutter>
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On Tue, 12 Oct 2004, John P. Sutter wrote:

> -----Original Message-----
> From: Igor Pechtchanski
> Sent: Tuesday, October 12, 2004 1:26 AM
>
> On Sun, 10 Oct 2004, John P. Sutter wrote:
> >> I have downloaded the OpenGL library source code from cygwin onto my
> >> Windows XP computer and have been trying to set it up from the
> >> makefiles.
> >
> >First off, why would you want to do this if there are binary packages
> >available for Cygwin?
>
> Because I would like to install XFree86 on my system with the GLX
> extension,

If the x.org fork of XFree86 is acceptable, then...

> which as far as I know is not included in the standard

Yes, it is.

> OpenGL library,

No, you said the GLX extension.  That is a feature of an X server, not of
the OpenGL library (ie. -lGL).

> but must be compiled with it. I thought that this would
> require the original source code for OpenGL. If I am wrong, and only the
> OpenGL binaries available from cygwin are needed, I would be thrilled!

Step back.  What *exactly* are you trying to accomplish in the end?

Here is the Cygwin OpenGL roadmap:

If your application is X11 based:
(This is OT for this list.  See redirection request below.)
The default Cygwin X server supports GLX via Mesa software emulation.
Their is an experimental version of the Cygwin X server that supports GLX
w/ hardware acceleration, but it is *experimental* and unfinished.
Compile with -I /usr/X11R6/include
Link w/ -L/usr/X11R6/lib -lglut (X11 based freeglut) -lGLU -lGL

If your application is purely glut based:
You can freely choose either path :-).

If your application is/can be Windows GUI based:
Full hardware acceleration is supported via a Windows pass through.
Link -lglut32 (Windows original glut port) -lglu32 -lopengl32
See /usr/share/doc/opengl-1.1.0/README.txt

Does that help?  Please send any X11 related follow-ups to the
cygwin-xfree list.  Thanks.

-- 
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained pilot...

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