bug 2398: OpenGL, child windows, and wine

Dan Kegel dank at kegel.com
Tue Oct 18 02:08:04 CDT 2005

The change back in January or so to no longer give
each window its own x window seems to have caused
an upheaval in the opengl world.  The first app to
report a problem was Lightwave 3D:
followed by
http://bugs.winehq.org/show_bug.cgi?id=2908  WeatherScope (free)
http://bugs.winehq.org/show_bug.cgi?id=3083  Google Earth (free)
http://bugs.winehq.org/show_bug.cgi?id=3400  Quake3 Radiant
http://bugs.winehq.org/show_bug.cgi?id=3583  Moray 3.5 (free)
I've taken the liberty of marking the latter four
bugs as duplicates of 2398, reopening 2398, and
targeting it to be fixed for Wine 1.0.

Willie Sippel's comment,
seems to point the way to a fix; he suggests using
the new GL_EXT_framebuffer_object OpenGL extension.
I checked around a bit, and it appears to be at least
partly supported by the latest NVidia and ATI drivers.
Sun's starting to use it in Java, too; see

A workaround is probably also possible without
that OpenGL extension, but it would probably run

I'm tempted to say skip the workaround, at least for
the first pass, and just implement the real fix using
the opengl extension.  As Sippel said, people who
use apps like Lightwave (and maybe Quake3 Radiant :-)
tend to have the latest 3d hardware and drivers anyway.

What do other people think?  Has anybody started
looking at fixing this yet?


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