On Fri, Dec 10, 2010 at 10:58 AM, Chia-I Wu <[email protected]> wrote:
> On Fri, Dec 10, 2010 at 10:55 AM, Jammy Zhou <[email protected]> > wrote: > > 2010/12/9 Chia-I Wu <[email protected]> > >> 2010/12/9 Kristian Høgsberg <[email protected]>: > >> > 2010/12/9 Jammy Zhou <[email protected]>: > >> >> Hi All, > >> >> > >> >> Currently I am doing some experiments with mesa 7.9 driver to check > the > >> >> renderer info of underlying OpenGL and OpenGL ES2.0 drivers to decide > >> >> which > >> >> driver to use at runtime. With my code attached, the renderer info > for > >> >> GLES2 > >> >> can be got successfully, and although the EGL and GLES2 libraries are > >> >> unloaded before creating the GLX context, glGetString(GL_RENDERER) > for > >> >> OpenGL still returns NULL. After enable MESA_DEBUG, I found the error > >> >> message "GL User Error: calling GL function without a rendering > >> >> context", > >> >> and many warnings as "Mesa warning: failed to remap ....". I also > >> >> changed > >> >> the sequence for GL and GLES2, but got similar results. If do > >> >> separately, > >> >> both renderer info can be got successfully. It seems that EGL/GLES2 > and > >> >> GLX/GL affects each other in this case, may be related to library > >> >> load/unload(?). Do you guys have some ideas to solve this problem? > >> > > >> > Yes, this is a limitation in the way the dri driver implements > >> > different APIs. We have a few global tables that get initialized with > >> > API specific data, so if you switch to a different GL API later, it > >> > will give you the remapping errors you saw. > >> > It would be nice to fix, but I don't know that anybody is looking into > >> > it. > >> 16ee7a55ae269612263468195f2af998cb9ef695 should solve the remapping > >> errors. It allows contexts of different client APIs to coexist. But > >> yes, there are still some global tables (e.g. glGet* table) that are > >> not multiple-API aware. There are also places that API check is done > >> at compile time... > > I just tried latest mesa with 16ee7a55ae269612263468195f2af9 > > 98cb9ef695 you mentioned, but the remapping errors are still there. > Do you have a test case for that? > I have created a bug in the bugzilla for tracking: https://bugs.freedesktop.org/show_bug.cgi?id=32285. And you can get the test code there as an attachment. > >> > >> > Kristian > >> > _______________________________________________ > >> > mesa-dev mailing list > >> > [email protected] > >> > http://lists.freedesktop.org/mailman/listinfo/mesa-dev > >> > > >> > >> > >> > >> -- > >> [email protected] > > > > > > > > -- > [email protected] >
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