Craig, I think it should be possible to get rendered output without the use of proprietary toolkits. Plain OpenGL should do as well by rendering into a (hidden) texture and calling something like glGetTexImage() to access the rendered output. I'm not an OGL programmer, but I've read about this kind of techniques many times. glReadPixels() provides basic access to the actual "frame buffer" of the rendered screen content. But since the output window might not be at full resolution, this is not a solution.
In general, it should be possible to make use of OpenGL for rendering, too. Just look at all the OGL based hardware-acceleration stuff they're working on for vector libraries like cairo/glitz. Toby > Hi Craig, > > I don't understand what you said. I thought that nvidia cg offers frame > buffer object to read data back from graphics card. > > Regards > Leigh > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Craig Lawson > Sent: Monday, 12 March 2007 8:29 p.m. > To: [email protected] > Subject: Re: [CinCVS] Why OpenGL does not affect rendering, It just > accelerates playback? > > > The graphics processor on the video card is not designed to send > rendered output back to the main processor. OpenGL instructions come in > one end, and rendered output goes out the other end ... to the monitor. > > It's unfortunate we can't intercept this data. Solid modelers such as > Blender could probably use it, too. Maybe someday there will be enough > market demand for the hardware to change. > > Craig. > > > Leigh Wanstead wrote: > > Hello everyone, > > > > I read this url. > > > http://cvs.cinelerra.org/docs/split_manual_en/cinelerra_cv_manual_en_3.html# > SEC41 > > > > May I ask why OpenGL does not affect rendering, It just accelerates > > playback? What is the reason? > > > > TIA > > > > Regards > > Leigh > > www.smootharm.com <http://www.smootharm.com/> > > _______________________________________________ > Cinelerra mailing list > [email protected] > https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra > > > > _______________________________________________ > Cinelerra mailing list > [email protected] > https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra > _______________________________________________ Cinelerra mailing list [email protected] https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
