> > It would basically be possible to write YUV4MPEG components that utilize > > graphics hardware of Shader Model 2.0 or greater (mostly Nvidia hardware > > since ATI support is quite limited) by initializing the graphics card > > under GLUT or GLFW and then activating a float pbuffer for offscreen > > processing.\
Unfortunately, AFAIK, floating pbuffers aren't yet supported in GLX, only offscreen buffers, which is what linux OpenGL developers have been using. > I've played with GLUT a little, but not GLFW. Can't the card be initialised > directly in OpenGL? An OpenGL surface is created in GLX, so at the lowest lowel, you can intialize OpenGL using GLX, which also means you need to be running X to use OpenGL. A console only solution without X seems impossible at the moment (at least if hardware accelerated OpenGL drivers are to be used). > I do know that with OpenGL installed, if there is not an OpenGL card > available, it will fall back to software rendering. But would this be much > slower than the current routines? And if it is, is it possible to have a > run-time check for OpenGL hardware and select the faster of the two then? I'm not sure but I don't think OpenGL shaders are supported in the software renderer. A good way to check for hardware acceleration would be to check for the presence of the 'glShaderSource' and/or 'glCompileShader' functions (both are in OpenGL 1.5/2.0, part of GLSL). NVidia drivers are hands down the best OpenGL drivers for linux. They support GLSL and Cg. I've written some proprietery GLSL code for my company*, nothin open source yet, but wouldn't mind chipping in. Cheers, Anoop. * - New Mexico Software Inc., the application is called Taos Image Finder ( http://www.taos3d.com/ ), an OpenGL 1.5/2.0 based image manager for Windoze; works good only on an NVidia card. ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
