Hello,
First of all, I’m french, so please forgive my bad english.
I’m facing a very strange behaviour. I’m writing a screensaver with some 3d involved. On most computers, both with Windows XP or Seven, it’s ok, but on one computer with an Intel HD 2000 graphic card, animations are very very slow. After some debugging, I’ve found that on that machine, I’m stuck with OpenGL 1.1.0 and not hardware acceleration. But, and that’s the weird part, if I change the extension of the screensaver from .scr to .exe, it works, I’ve access to OpenGL 3.1 !
So, to be clear :
On a machine with Windows XP SP 3 and a Intel HD Graphics 2000 chip with the last driver :
screensaver.scr -> OpenGL 1.1.0, no hardware acceleration.
screensaver.exe (absolutely the same binary, only renamed) -> OpenGL 3.1, hardware acceleration.
What am I missing here ? Is it possible that the Intel HD 2000 driver is in some way incomplete and does not give access to hardware acceleration when the OpenGL calls are made from a screensaver ?
Thanks for your help.