[ITP] freeglut-2.2.0-1

Andre Bleau bleau@igb.umontreal.ca
Thu Jun 10 13:42:00 GMT 2004

Comments inserted below.

Gerrit P. Haase wrote:

>I want to contribute/maintain freeglut.
>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).
>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."

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 . 

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