Using GL Extentions in irrlicht

speewave · Post by **speewave** » Sat Aug 01, 2009 5:59 am

excuse any typos im using my pocket pc pda... anyway

how can i incorporate GL extentions in irrlicht and check if one is supported

so if user has ATI_EXT_EMBM or whatever use this over a shader EMBM?

hybrid · Post by **hybrid** » Sat Aug 01, 2009 8:36 am

Such checks are made in COpenGLExtensionHandler. Only a few checks are made public through the IVideoDriver interface, though. A proper function for all such driver specific checks is still to be defined. You can add a value to the driver feature enum to add a specific check you'd need.

speewave · Post by **speewave** » Sat Aug 01, 2009 1:16 pm

but can i still use GL Extentions in Irrlicht?

hybrid · Post by **hybrid** » Sun Aug 02, 2009 1:08 pm

The driver makes extensive use of several extensions of course. You can use extensions in your OpenGL calls as well, but you need to cope with non-existance on your own then. Irrlicht's policy is to provide higher-level functions which try to make best use of the available extensions internally. This is also the reason why no access is given to the driver-internal extension list. But if you add such a value to the video driver feature enum as described, you can easily check for this extension and use gl code which requires the extension.