Flipping buffers takes unreasonably much time.

Graphics and GPU Programming Programming OpenGL

Started by PureW May 19, 2007 11:11 AM

11 comments, last by Ingrater 16 years, 11 months ago

11,263

May 20, 2007 04:58 PM

For the record, it looks like this is fixed in the Vista version of the driver, as the output I'm getting is t1: 3ms t2: 0 ms

Another plus for the OGL rewrite from ATI it seems [smile]

PureW

127

Author

May 21, 2007 10:02 AM

Quote:Original post by PureW
Someone was right, it was the ati drivers.

I tried it on my new computer, with an Nvidia 6800le card, and I could
render twice that amount, 12000 bugs in 11 ms, with the flip taking 0 ms.

Thank you all!

I tried glFinish() this morning and something strange surfaced.
Without glFinish, flipping buffers took some time, but when I added
glFinish as is seed below, flipping buffers took 0ms.

                xTimer t(1);				glClear( GL_COLOR_BUFFER_BIT );		glLoadIdentity();		keepOn = events.checkEvents();		draw();				std::cout << "t1: " << (int)t.Elapsedms() << " ms.\t";                glFinish();		xTimer t2(1);		SDL_GL_SwapBuffers();		std::cout << "t2: " << (int)t2.Elapsedms() << " ms.\n";