Re: [ITP] freeglut-2.2.0-1

[Andre Bleau <bleau at igb dot umontreal dot ca>]

Comments inserted below.

Gerrit P. Haase wrote:

> Hello,
>
> I want to contribute/maintain freeglut.
> <http://freeglut.sf.net/>http://freeglut.sf.net/
>
> Freeglut is the OpenSourced alternative to the OpenGL Utility Toolkit
> (GLUT) library, this version is compiled as drop-in replacement
> (includes GL/glut.h and libglut.a/.dll.a), unfortunately this is a
> conflict since the opengl package includes also this header, so here is
> some common sense needed.  Since I prefixed freeglut with /usr/X11R6 no
> files will be overwritten, but depending on include path order it may
> lead to compile errors if both packages are installed.

The /usr/X11R6 prefix would indeed avoid overwitting existing files. As for 
conflicts, the developper would have to choose between building an X 
application using your freeglut package or a native Windows application, 
using the Opengl package, and set path for include files and libs accordingly.


> OpenGL is several years old and I think there is no other package using
> this library, at least a grep on setup.ini gives five matches which are
> the opengl package informations.

The OpenGL package is for a different purpose than the freeglut package you 
are proposing. The OpenGL package is for building GLUT and OpenGL-based 
applications where the display is handled directly by Windows and is 
hardware accelerated (native Windows application). Your freeglut package is 
for building GLUT and OpenGL-based applications where the display is done 
by an X-server, without (for now), hardware acceleration of OpenGL functions.

Last time I checked, OpenGL functions where 2 to 100 times faster for 
native Windows apps than for X-server apps, depending on the function and 
the graphic card. So these packages serve different purposes: the OpenGL 
package for maximum speed and your freeglut package for X-server based apps.


> Freeglut may also be compiled to co-exist with existing packages, then
> the library would be named libfreeglut.a/.dll.a.
>
> GLUT/Freeglut will be used if it is present by JasPer which I'm
> currently preparing for ITP (and JasPer will be used by ImageMagick for
> JPEG-2000 support if JasPer it is present).
>
>
> setup.hint:
> ===
> category: Graphics Libs
> requires: cygwin xorg-x11-bin-dlls
> sdesc: "OpenSourced alternative to the OpenGL Utility Toolkit (GLUT) library"
> ldesc: "freeglut is a completely OpenSourced alternative to the
> OpenGL Utility Toolkit (GLUT) library. GLUT was originally written
> by Mark Kilgard to support the sample programs in the second edition
> OpenGL 'RedBook'. Since then, GLUT has been used in a wide variety
> of practical applications because it is simple, widely available and
> highly portable.
>
> GLUT (and hence freeglut) allows the user to create and manage windows
> containing OpenGL contexts on a wide range of platforms and also read
> the mouse, keyboard and joystick functions."
>
>
> <http://anfaenger.de/cygwin/freeglut/freeglut-2.2.0-1-src.tar.bz2>http://anfaenger.de/cygwin/freeglut/freeglut-2.2.0-1-src.tar.bz2
> http://anfaenger.de/cygwin/freeglut/freeglut-2.2.0-1.tar.bz2
> <http://anfaenger.de/cygwin/freeglut/setup.hint>http://anfaenger.de/cygwin/freeglut/setup.hint
> README: 
> <http://anfaenger.de/cygwin/freeglut/>http://anfaenger.de/cygwin/freeglut/
>
>
> Gerrit
> --
> =^..^=

BTW, I vote +1 for this. I may even use Gerrit's package as a starting 
point for a native freeglut in a future OpenGL package.



André Bleau, Cygwin's OpenGL package maintainer.

Please address all questions and problem reports about Cygwin's OpenGL 
package to cygwin at cygwin dot com .