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# GLEW - The OpenGL Extension Wrangler Library
http://glew.sourceforge.net/
https://github.com/nigels-com/glew
[](https://travis-ci.org/nigels-com/glew)
[](https://gitter.im/nigels-com/glew?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
[](https://sourceforge.net/projects/glew/files/latest/download)
## Downloads
Current release is [2.1.0](https://sourceforge.net/projects/glew/files/glew/2.1.0/).
[(Change Log)](http://glew.sourceforge.net/log.html)
Sources available as
[ZIP](https://sourceforge.net/projects/glew/files/glew/2.1.0/glew-2.1.0.zip/download) or
[TGZ](https://sourceforge.net/projects/glew/files/glew/2.1.0/glew-2.1.0.tgz/download).
Windows binaries for [32-bit and 64-bit](https://sourceforge.net/projects/glew/files/glew/2.1.0/glew-2.1.0-win32.zip/download).
### Recent snapshots
Snapshots may contain new features, bug-fixes or new OpenGL extensions ahead of tested, official releases.
## Build
It is highly recommended to build from a tgz or zip release snapshot.
The code generation workflow is a complex brew of gnu make, perl and python, that works best on Linux or Mac.
For most end-users of GLEW the official releases are the best choice, with first class support.
### Linux and Mac
#### Using GNU Make
##### Install build tools
Debian/Ubuntu/Mint: `$ sudo apt-get install build-essential libxmu-dev libxi-dev libgl-dev libosmesa-dev`
RedHat/CentOS/Fedora: `$ sudo yum install libXmu-devel libXi-devel libGL-devel`
##### Build
$ make
$ sudo make install
$ make clean
Targets: `all, glew.lib (sub-targets: glew.lib.shared, glew.lib.static), glew.bin, clean, install, uninstall`
Variables: `SYSTEM=linux-clang, GLEW_DEST=/usr/local, STRIP=`
_Note: may need to make **auto** folder_
#### Using cmake
*CMake 2.8.12 or higher is required.*
##### Install build tools
Debian/Ubuntu/Mint: `$ sudo apt-get install build-essential libXmu-dev libXi-dev libgl-dev cmake`
RedHat/CentOS/Fedora: `$ sudo yum install libXmu-devel libXi-devel libGL-devel cmake`
##### Build
$ cd build
$ cmake ./cmake
$ make -j4
| Target | Description |
| ---------- | ----------- |
| glew | Build the glew shared library. |
| glew_s | Build the glew static library. |
| glewinfo | Build the `glewinfo` executable (requires `BUILD_UTILS` to be `ON`). |
| visualinfo | Build the `visualinfo` executable (requires `BUILD_UTILS` to be `ON`). |
| install | Install all enabled targets into `CMAKE_INSTALL_PREFIX`. |
| clean | Clean up build artifacts. |
| all | Build all enabled targets (default target). |
| Variables | Description |
| --------------- | ----------- |
| BUILD_UTILS | Build the `glewinfo` and `visualinfo` executables. |
| GLEW_REGAL | Build in Regal mode. |
| GLEW_OSMESA | Build in off-screen Mesa mode. |
| BUILD_FRAMEWORK | Build as MacOSX Framework. Setting `CMAKE_INSTALL_PREFIX` to `/Library/Frameworks` is recommended. |
### Windows
#### Visual Studio
Use the provided Visual Studio project file in build/vc12/
Projects for vc6 and vc10 are also provided
#### MSYS/Mingw
Available from [Mingw](http://www.mingw.org/)
Requirements: bash, make, gcc
$ mingw32-make
$ mingw32-make install
$ mingw32-make install.all
Alternative toolchain: `SYSTEM=mingw-win32`
#### MSYS2/Mingw-w64
Available from [Msys2](http://msys2.github.io/) and/or [Mingw-w64](http://mingw-w64.org/)
Requirements: bash, make, gcc
$ pacman -S gcc make mingw-w64-i686-gcc mingw-w64-x86_64-gcc
$ make
$ make install
$ make install.all
Alternative toolchain: `SYSTEM=msys, SYSTEM=msys-win32, SYSTEM=msys-win64`
## glewinfo
`glewinfo` is a command-line tool useful for inspecting the capabilities of an
OpenGL implementation and GLEW support for that. Please include `glewinfo.txt`
with bug reports, as appropriate.
---------------------------
GLEW Extension Info
---------------------------
GLEW version 2.0.0
Reporting capabilities of pixelformat 3
Running on a Intel(R) HD Graphics 3000 from Intel
OpenGL version 3.1.0 - Build 9.17.10.4229 is supported
GL_VERSION_1_1: OK
---------------
GL_VERSION_1_2: OK
---------------
glCopyTexSubImage3D: OK
glDrawRangeElements: OK
glTexImage3D: OK
glTexSubImage3D: OK
...
## Code Generation
A Unix or Mac environment is needed for building GLEW from scratch to
include new extensions, or customize the code generation. The extension
data is regenerated from the top level source directory with:
make extensions
An alternative to generating the GLEW sources from scratch is to
download a pre-generated (unsupported) snapshot:
https://sourceforge.net/projects/glew/files/glew/snapshots/
Travis-built snapshots are also available:
https://glew.s3.amazonaws.com/index.html
## Authors
GLEW is currently maintained by [Nigel Stewart](https://github.com/nigels-com)
with bug fixes, new OpenGL extension support and new releases.
GLEW was developed by [Milan Ikits](http://www.cs.utah.edu/~ikits/)
and [Marcelo Magallon](http://wwwvis.informatik.uni-stuttgart.de/~magallon/).
Aaron Lefohn, Joe Kniss, and Chris Wyman were the first users and also
assisted with the design and debugging process.
The acronym GLEW originates from Aaron Lefohn.
Pasi Kärkkäinen identified and fixed several problems with
GLX and SDL. Nate Robins created the `wglinfo` utility, to
which modifications were made by Michael Wimmer.
## Copyright and Licensing
GLEW is originally derived from the EXTGL project by Lev Povalahev.
The source code is licensed under the
[Modified BSD License](http://glew.sourceforge.net/glew.txt), the
[Mesa 3-D License](http://glew.sourceforge.net/mesa.txt) (MIT) and the
[Khronos License](http://glew.sourceforge.net/khronos.txt) (MIT).
The automatic code generation scripts are released under the
[GNU GPL](http://glew.sourceforge.net/gpl.txt).
|
