Yes, the OpenGL Extension Wrangler Library (GLEW) is a painless way to use OpenGL extensions on Windows. Here's how to get started on it:.
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UsingGLEWtouseOpenGLextensionsunderWindows
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I'vebeenusingOpenGLextensionsonWindowsthepainfulway.IsGLEWtheeasierwaytogo?HowdoIgetstartedwithit?
openglglew
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editedMay23,2017at12:33
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askedAug20,2008at3:19
AshwinNanjappaAshwinNanjappa
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Yes,theOpenGLExtensionWranglerLibrary(GLEW)isapainlesswaytouseOpenGLextensionsonWindows.Here'showtogetstartedonit:
IdentifytheOpenGLextensionandtheextensionAPIsyouwishtouse.OpenGLextensionsarelistedintheOpenGLExtensionRegistry.
Checkifyourgraphiccardsupportstheextensionsyouwishtouse.DownloadandinstallthelatestdriversandSDKsforyourgraphicscard.
RecentversionsofNVIDIAOpenGLSDKshipwithGLEW.Ifyou'reusingthis,thenyoudon'tneedtodosomeofthefollowingsteps.
DownloadGLEWandunzipit.
AddtheGLEWbinpathtoyourWindowsPATHenvironmentvariable.Alternatively,youcanalsoplacetheglew32.dllinadirectorywhereWindowspicksupitsDLLs.
AddtheGLEWincludepathtoyourcompiler'sincludedirectorylist.
AddtheGLEWlibpathtoyourcompiler'slibrarydirectorylist.
Instructyourcompilertouseglew32.libduringlinking.Ifyou'reusingVisualC++compilersthenonewaytodothisisbyaddingthefollowinglinetoyourcode:
#pragmacomment(lib,"glew32.lib")
Adda#includelinetoyourcode.EnsurethatthisisplacedabovetheincludesofotherGLheaderfiles.(YoumayactuallynotneedtheGLheaderfilesincludesifyouincludeglew.h.)
InitializeGLEWusingglewInit()afteryou'veinitializedGLUTorGL.Ifitfails,thensomethingiswrongwithyoursetup.
if(GLEW_OK!=glewInit())
{
//GLEWfailed!
exit(1);
}
Checkiftheextension(s)youwishtousearenowavailablethroughGLEW.YoudothisbycheckingabooleanvariablenamedGLEW_your_extension_namewhichisexposedbyGLEW.
Example:
if(!GLEW_EXT_framebuffer_object)
{
exit(1);
}
That'sit!YoucannowusetheOpenGLextensioncallsinyourcodejustasiftheyexistednaturallyforWindows.
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answeredAug20,2008at3:19
AshwinNanjappaAshwinNanjappa
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Hello.DoesthisworkwithMinGW?Ihavebeentryingfor2daysnow,butallIgetareerrorslike:undefinedreferenceto'_imp__glewInit@0'andundefinedreferenceto'_imp____glewCreateShader'
– DanielsaysReinstateMonica
Aug16,2012at22:10
DantheMan:ThissolutionwaswithVisualC++.IhavenoideaifthisworkswithMingGW.
– AshwinNanjappa
Aug18,2012at2:37
AFAIK,#pragmacomment(lib,"glew32.lib")onlyworksonVisualC++.ForMinGWyoushouldaddthelibrariestothecompiler'scommandline(Ithinkit's-L).
– ThiagoNegri
Jan15,2013at10:02
@DantheMantrychangingorderoflibraries,especiallyinC::Bwhereyouhave'Project'and'Target'settingsandyoudecidewhichgetslinkedfirst.Idon'tunderstanditfullybutIjustfixedmyproblemthisway:).
– kolenda
Mar18,2013at22:37
WhichGLEWshouldIget,thesourceorthebinaries?I'mlost...andI'venoticedthatoneofthemhasanemptylibfolder.
– Andrei
May4,2014at8:57
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PersonallyIwouldn'tuseanexitcommand.
Iwouldthrowanexceptionsoyoucanclearanyotherinitialisationupattheendofthefunction.
ie:
try
{
//initopengl/directx
//initdirectaudio
//initdirectinput
if(GLEW_OK!=glewInit())
{
throwstd::exception("glewInitfailed");
}
}
catch(conststd::exception&ex)
{
//messagetoscreenusingex.what()
//clearup
}
AndIagreewithOJ-ifyouwanttowritetutorialsforothers,thenthisisreallythewrongplaceforit.Therearealreadyaloadofgoodplacesforopengltutorials.Trythisoneforinstance.
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answeredAug20,2008at5:08
graham.reedsgraham.reeds
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Ilostsometime,butfinallyImanagedtogetGLEWworking.
I'musingWindows7(x64),EclipseCDTandMinGW,andthewayisthat:
DownloadMSYS(forMinGW)andrembertohaveMinGWinstalledcorrectly(PATHenviroinmentvariablesetcorrectly):
http://sourceforge.net/projects/mingw/files/MSYS/Base/msys-core/msys-1.0.10/MSYS-1.0.10.exe/download?use_mirror=freefr&download=
OnceMSYSinstalled,goto:
http://glew.sourceforge.net/
anddownloadtheTGZpackage,whichisintendedtousewithUNIXsystems
Thenopenthepackage(youcanuse7zipaswell)andfindthe"Makefile".
Openitandwithatexteditor(Notepadshouldworkfine)findtherowwhichcontains"GLEW_DEST"andreplaceitwithsomethinglike"GLEW_DEST?=C:/MinGW"
Nowyouarereadytogo,openMSYS(C:\MinGW\msys\1.0\msys.batinmycase)andintheshellopened,gotothefolderwherethe"Makefile"is.
Thenwriteasimple:"makeinstall"andtheworkisdone(atleastformeitworked)
PS:Ialsocopy-pastedglew-1.10.0-win32\glew-1.10.0\bin\Release\Win32file'sintomySystem32folder,andinEclipseCDTIaddedthelibrary"glew32"inthelinkeroptionandaddeda#includebefore#include
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answeredJul29,2013at11:28
iMineLinkiMineLink
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