Hi Allan, > On Saturday 01 March 2014, Jori Liesenborgs wrote: >> Hi everyone, >> >> I was wondering if someone knows how to avoid copying the view from a >> WebGL component to the CPU each time. On [1] it says to use a >> QGraphicsWebView with a QGLWidget viewport, but if I try this the result >> seems to be even slower than the more naive version. >> > It should work. What version of Qt are you using? There was a regression in > Qt 5.1 that could trigger if you build against EGL instead of OpenGL. This > would cause CPU copying on every frame. In Qt 5.2 though, QGraphicsWebView > should always render directly to the QGLWidget, if using accelerated > compositing is enable and a Qt GL context was found.
This is with Qt 5.2.1. When I run it in the 'normal' mode, I get a framerate of 35 fps, while using the QGLWidget I get 20 fps (1/3 vsync). Is there a working example somewhere that shows how this should be done? Cheers, Jori _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
