BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How to show the version number of OpenGL?          BorlandTalk.com Forum Index -> Delphi Graphics View previous topic :: View next topic   Author Message Ma Xiaoguang Guest Posted: Thu Apr 26, 2007 8:11 am    Post subject: How to show the version number of OpenGL? Dear Ladies and Gentlemen, I want to show the version number of OpenGL with TLabel. I added the OpenGL library to the uses clause, and called the glGetString(GL_VERSION). But this routine returns a PChar, I don't know how to convert it to a string, and show it on the caption of a TLabel. Help me, please. Thank you very much. Best regards. Xiaoguang Back to top Lord Crc Guest Posted: Fri Apr 27, 2007 1:50 am    Post subject: Re: How to show the version number of OpenGL? On Thu, 26 Apr 2007 13:54:38 +0800, "Ma Xiaoguang" <maxiaoguang10000 (AT) hotmail (DOT) com> wrote: Quote: I want to show the version number of OpenGL with TLabel. I added the OpenGL library to the uses clause, and called the glGetString(GL_VERSION). But this routine returns a PChar, I don't know how to convert it to a string, and show it on the caption of a TLabel. Help me, please. Thank you very much. Delphi can convert PChar's "on the fly" to strings, so you should be able to simply say Label1.Caption:= glGetString(...); - Asbjørn Back to top Ma Xiaoguang Guest Posted: Fri Apr 27, 2007 5:45 am    Post subject: Re: How to show the version number of OpenGL? Hello, Quote: Delphi can convert PChar's "on the fly" to strings, so you should be able to simply say Label1.Caption:= glGetString(...); Thanks for your reply. But the glGetString() gives me nothing. What's the reason, please? Best regards. Xiaoguang Back to top Mitch Guest Posted: Fri Apr 27, 2007 7:47 pm    Post subject: Re: How to show the version number of OpenGL? Ma Xiaoguang wrote: Quote: Hello, Delphi can convert PChar's "on the fly" to strings, so you should be able to simply say Label1.Caption:= glGetString(...); Thanks for your reply. But the glGetString() gives me nothing. What's the reason, please? Best regards. Xiaoguang Sounds like a driver or OS issue. Have you tried the other constants GL_VENDOR and GL_RENDERER? What OS are you using? NVidia has had some driver issues with Vista. Try it on another computer or ask your question on the OpenGL.org forums where you'll find a more OpenGL expertise then you can shake a stick at. Mitch Wolberg, RockWare, Inc. Back to top Lord Crc Guest Posted: Fri Apr 27, 2007 8:09 pm    Post subject: Re: How to show the version number of OpenGL? On Fri, 27 Apr 2007 08:45:31 +0800, "Ma Xiaoguang" <maxiaoguang10000 (AT) hotmail (DOT) com> wrote: Quote: Thanks for your reply. But the glGetString() gives me nothing. What's the reason, please? Do you have a valid opengl context active? - Asbjørn Back to top Ma Xiaoguang Guest Posted: Sat Apr 28, 2007 8:11 am    Post subject: Re: How to show the version number of OpenGL? Hi, Quote: Do you have a valid opengl context active? I am not sure. Thanks for you reply. Best regards. Xiaoguang Back to top Ma Xiaoguang Guest Posted: Sat Apr 28, 2007 8:11 am    Post subject: Re: How to show the version number of OpenGL? Hi Mitch, Thanks for your reply. Quote: Sounds like a driver or OS issue. Have you tried the other constants GL_VENDOR and GL_RENDERER? What OS are you using? It still not work with GL_VENDOR and GL_RENDERER. My OS is Windows XP Professional SP2, and I compiled the code with Delphi 6 Enterprise. Best regards. Xiaoguang Back to top Lord Crc Guest Posted: Sat Apr 28, 2007 3:15 pm    Post subject: Re: How to show the version number of OpenGL? On Sat, 28 Apr 2007 14:51:22 +0800, "Ma Xiaoguang" <maxiaoguang10000 (AT) hotmail (DOT) com> wrote: Quote: Do you have a valid opengl context active? I am not sure. Thanks for you reply. Uhm, are you using raw OpenGL or some form for wrapper? If you're using raw OpenGL then you have to create and activate the context before the glGetString() stuff. That would be wglCreateContext and wglMakeCurrent calls. If you're using some sort of package, they usually pull out the vendor string and such and place it in some variable. - Asbjørn Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Graphics All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.