glXCreateGLXVideoSourceSGIX

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From: Satheesh Ganapathi Subramanian (gsat++at++evl.uic.edu)
Date: 10/13/2000 12:23:05

Hi Performers,

I'm trying to use SIRIUS video to texture map on an ONYX with RE within a
CAVE program. I'm facing a problem when trying to create a
glXVideoSourceSGIX object using the glXCreateGLXVideoSourceSGIX function.

The code snippet of the PreDraw callback for the VideoScreen (is derived
from pfDCS and has a simple polygon attached to it) is shown below:

int VideoScreen::PreDraw(pfTraverser *trav)
{
    pfChannel *chan = trav->getChan();

    if (!display)
    {
         display = pfGetCurWSConnection();
         pipeWindow = chan->getPipe()->getPWin(0);
         pfPipe *pipe = chan->getPipe();
         videoSource = glXCreateGLXVideoSourceSGIX(display, 0, video->svr,
                                video->path, VL_TEXTURE, video->drn);
         if (videoSource == None)
         {
                    fprintf(stderr, "can't create video source\n");
                    perror("debug");
                    //exit(EXIT_FAILURE);
         }
     }
     if (!glXMakeCurrentReadSGI(display, pipeWindow->getCurWSDrawable(),
                                videoSource, pipeWindow->getGLCxt()))
        cerr << "glXMakeCurrentReadSGI failed \n";

     tex->load(); /* tex is a pfTexture* inside VideoScreen class */
}

glXCreateGLXVideoSourceSGIX returns None.

initialize()
{
        This function creates a new pfScene and attaches it to the
        pfCAVEMasterChan().
}

initialize is called before the VideoScreen object is created and added to
the scene graph. I think the pfGetCurWSConnection is not returning a valid
Display* as the other parameters for glXCreateGLXVideoSourceSGIX appear to
be correct.

Any help in solving this problem would be most appreciated.

Thanks,
Satheesh

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