Hi Hartmut, On Fri, Jul 22, 2011 at 2:30 PM, Hartmut Seichter <[email protected]> wrote: > Firstly, I figured that the calls to eglCreateContext and eglCreateSurface > were swapped. It shouldn't make a difference but I think most examples are > in that order. Beside that, a final eglMakeCurrent with context and surface > was missing to connect them.
An eglMakeCurrent should just be required before rendering, and should be called by osgViewer when required. This is at least how GLX and the other OpenGL windowing system integration work. > Regarding the EGL_<COLOR>_SIZE items. This might be a driver issue, but I > have enough devices here to see similar behavior with them - actually > leaving things at 0 (default) is probably the best way to handle that. >What > happens is that eglChooseConfig creates some random config just to satisfy > some items in your attributes and a subsequent eglCreateWindowSurface fails > then with a "Bad Config" error. > > EGL_DEPTH_SIZE seemingly works with value of 1. > > My tests are on a N900 and a few other devices. I really don't feel comfortable with just leaving the RGBA all to defaults, and explictly setting a value 0 certainly doesn't sound like default. It seems wrong to me. Could you please documentation that this is appropriate for EGL that lead down the path you have taken? The original code passes on the Traits::red, green, blue and alpha values when creating a GLX context. The present code in svn/trunk doesn't do this for EGL but does it correctly for GLX, so I would have though we should be passing on these values rather than just leave the values of 1. Robert. > > I added an extra small tweak to switch of composting on hildon based > devices. It should not effect other X11 implementations. > > Cheers, > Hartmut > > On 7/22/11 10:54 AM, Robert Osfield wrote: >> >> Hi Harmut, >> >> Could you answer the questions I posed in my previous email, I can't >> merge any changes from you till I've got to the bottom of the >> problems. >> >>> I'm curious as to why this wasn't a problem in my own testing, I >>> presume it's a driver specific issue. >>> >>>> - the defaults for EGL_<COLOR>_SIZE is 0 and can be set safely to >>>> EGL_DONT_CARE >>> >>> But we do care what the colour and depth buffer settings are... which >>> is why I set them to a minimum of 1. I don't understand why setting >>> them to EGL_DONT_CARE would be a good thing, we want to make sure that >>> the context created can do a RGB + depth buffer. >>> >>> I don't understand the motivation or need for this change. >>> >>> Could you explain? >>> >>> Thanks, >>> Robert. >>> >> _______________________________________________ >> osg-submissions mailing list >> [email protected] >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org > > > -- > Hartmut Seichter, PhD (HKU), Dipl.-Ing. (BUW) > > > _______________________________________________ > osg-submissions mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org > > _______________________________________________ osg-submissions mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org
