[OpenJDK 2D-Dev] Questions about the X11 backend
Dmitri.Trembovetski at Sun.COM
Sun May 4 19:18:46 UTC 2008
Phil is right, the pipeline is still being used
and is the fastest way to render on the framebuffers
where it is used.
As for the MITSHM ifdefs, I believe they are there
for some licensees who might want to build the
jdk w/o the MITSHM support. Although I would
not hazard to guess if it even builds w/o MITSHM
now, I haven't tried in a while.
Phil Race wrote:
> Jim Graham wrote:
>> Hi Clemens,
>>> 4.) Is DGA still used? I see quite a lot #ifdef's for missing MITSHM
>>> and DGA, but I wonder wether there are still systems without MITSHM,
>>> and the other way round for DGA.
>> I believe it may no longer be in use, but Dmitri would have to answer
>> to be sure. It was a Sun-specific API for coordinating talking
>> directly to the framebuffer with the X11 server. Since then more work
>> on the X11 and OpenGL pipelines and the use of MITSHM and the fact
>> that Sun stopped shipping framebuffers with DGA drivers at some point
>> made the importance of that pipeline wane...
> Well, still its in daily use on my Solaris 10 SPARC SB2000 with FFB2+.
> So I'm not sure I'd want to ditch DGA quite yet. I think it should stay
> at least for JDK7.
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