Hi opensg friends,
i am back on my former screenshots problem.
I am running OpneSG in client-server mode,
with the client setting up the scene and controlling the navigation and the
server simply executing the render itself.
I want to take screenshots of the remote scene and save the images back to
the client. Doing it via the GrabForeGround ends up in client-side empty
pngs. Just to be sure that the foregrounds are working, I paired to the grab
Foreground a FileGrabForeground, which saves pngs remotely without a
problem.
My code looks like:
fgndImage = osg::FileGrabForeground::create();
beginEditCP(fgndImage);
fgndImage->setIncrement(false);
fgndImage->setAutoResize(true);
fgndImage->setActive(false);
endEditCP(fgndImage);
fgndImageGrabber = GrabForeground::create();
image = osg::Image::create();
beginEditCP(image);
image->set(Image::OSG_BGRA_PF,300,300);
endEditCP(image);
beginEditCP(fgndImageGrabber);
fgndImageGrabber->setImage (image);
fgndImageGrabber->setAutoResize(true);
fgndImageGrabber->setActive(false);
endEditCP(fgndImageGrabber);
osg::ViewportPtr vpr = mwin->getPort (0);
beginEditCP(vpr);
vpr->getForegrounds().push_back(fgndImage);
vpr->getForegrounds().push_back(fgndImageGrabber);
vpr->setRoot(scene);
vpr->setSize(0,0,1,1);
vpr->setBackground(gb);
endEditCP(vpr);
and the screenshot routine is simply:
void takeScreenshot ()
{
static int i = 0;
char buf[40];
sprintf (buf,"./screenshots/image%d.png",i++);
printf ("Shot %s\n",buf);
beginEditCP(fgndImage/*, osg::GrabForeground::ImageFieldMask*/);
fgndImage->setName(buf);
endEditCP(fgndImage);
beginEditCP(fgndImageGrabber/*,
osg::GrabForeground::ImageFieldMask*/);
fgndImageGrabber->setActive(true);
endEditCP(fgndImageGrabber);
beginEditCP(fgndImage);
fgndImage->setActive(true);
endEditCP(fgndImage);
mgr->redraw();
// render pass
beginEditCP(fgndImageGrabber);
fgndImageGrabber->setActive(false);
endEditCP(fgndImageGrabber);
beginEditCP(fgndImage);
fgndImage->setActive(false);
endEditCP(fgndImage);
image->write (buf);
}
Does anyone can find a reason why I can't get the pixmaps locally?
I'd like to get 'em back to the client cause the final goal is to shrink all
the pngs to a single AVI (since I don't seem to be able to get the
avforeground working)
Thanks a lot,
E.
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