[uae] Re: SDL and Vsync
- From: fari mueller <farimueller@xxxxxxxx>
- To: uae@xxxxxxxxxxxxx
- Date: Thu, 2 Feb 2006 11:20:03 +0100 (CET)
F**k, it spoils the adress. OK, you have to replace all the xxxxxx by
toybox.twisted.org.uk in order to see the it.
fari mueller <farimueller@xxxxxxxx> schrieb: I tried it yesterday but it
didn't help. Changing the videodriver to dga did work, but the tearing is still
there. Obviously activating and using the double buffering is not that simple
as I was hoping, but it doesn't seem to be a big deal either. I found the
following:
http://www.mail-archive.com/xmame@xxxxxxxxxxxxxxxxxxxxx/msg06159.html
This is how they implemented it in XMAME. Apparently it just requires some
minor changes to do it. I'd like to implement it myself, but my C knowledge has
almost expired after several years of not using it and when it comes to C++ and
SDL things get even worse.
So, I'd be quite grateful if someone could implement it or explain to me how
to do it.
Let's do this simple (hopefully) but huge improvement and make E-UAE also a
real alternative for arcade cabinet users.
fari mueller <farimueller@xxxxxxxx> schrieb:
Found some information about the VSYNC support of SDL and it looks like SDL
is actually able to handle the Vsync. The main problem seems to be that it uses
the x11 video driver by default which is not able to do it. Therefore the
SDL_VIDEODRIVER variable has to be set to a suitable driver, for example dga or
directfb.
http://www.devolution.com/pipermail/sdl/2003-October/057060.html
Then you have to enable double buffering and SDL will allegedly do the rest.
http://www.devolution.com/pipermail/sdl/2002-October/049550.html
Can this be used to get rid of this annoying tearing problem in E-UAE?
How can I use it? Should I type export SDL_VIDEODRIVER=dga in my shell before
starting uae or can I add it to the .uaerc? How to enable SDL_DOUBLEBUF is this
also a variable?
That would mean if I set SDL_VIDEODRIVER=dga and SDL_DOUBLEBUF=1 before
invoking E-UAE I might have it running?
I'll try to do this as soon as I have some time, but it would be great if
somebody with a bit more knowledge about this stuff could tell me if this
sounds reasonable of if I'm telling complete bullshit.
At least it should be somehow possible to get rid of this tearing problem which
is IMO one of the major glichtes in E-UAE at the moment.
Frank
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