SGI Xinerama API

2001-09-26 Thread Stephane Rosa 

Hi,

I'm preparing an SGI package of fvwm and I have a couple issues
with your implementation of Xinerama.

SGI is currently developing the Xinerama library as per the
latest spec (Actually SGI is even beyond the spec for certain
things)

It sounds like you're using an old spec. A couple differences :

Bool XineramaActive() replaces char XineramaIsActive()

XineramaScreenInfo *XineramaQueryScreens(disp, count)
along with the typedef struct are not in the spec anymore.

An equivalent could be found by using XineramaGetScreenCount
and XineramaGetScreenSize, but the very latest spec will show
up a new function, XineramaGetData

so... a couple questions:

- how do we keep up on API spec changes (very often yet)
- is anybody following this very close ?
- I'll patch 2.4.2 for SGI use. Want the spec ?

Thanks!
Stephane

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Re: SGI Xinerama API

2001-09-26 Thread Dmitry Yu. Bolkhovityanov 
On Wed, 26 Sep 2001, Stephane Rosa wrote:

 Hi,
 
 I'm preparing an SGI package of fvwm and I have a couple issues
 with your implementation of Xinerama.
 
 SGI is currently developing the Xinerama library as per the
 latest spec (Actually SGI is even beyond the spec for certain
 things)
 
 It sounds like you're using an old spec. A couple differences :
 
 Bool XineramaActive() replaces char XineramaIsActive()
 
 XineramaScreenInfo *XineramaQueryScreens(disp, count)
 along with the typedef struct are not in the spec anymore.
 
 An equivalent could be found by using XineramaGetScreenCount
 and XineramaGetScreenSize, but the very latest spec will show
 up a new function, XineramaGetData
 
 so... a couple questions:

 - how do we keep up on API spec changes (very often yet)

All the Xinerama-API-related functionality is in 
libs/FScreen.c::FScreenInit(), and what it really needs is a) a function
to check if Xinerama is present at all,  b) a way to get a list of screen
rectangles (viewports to global screen).  Since all APIs (except old
PanoramixNNN one) supply these, it is a matter of simple configure
script logic plus a few #ifdef's in FScreen.c (like 

#if   defined(XINERAMA_API_XFREE86)
...
#elif defined(XINERAMA_API_XORG)
...
#endif

 - is anybody following this very close ?

I'm the person who tries to track Xinerama API flavors.

 - I'll patch 2.4.2 for SGI use. Want the spec ?

Yes, the spec is very welcome.  BTW, which spec is it?  There are
at least four APIs: 1) old PanoramixNNN; 2) XFree86's XineramaNNN (which
is the only API currently in use by WMs and toolkits); 3) Xinerama project
API 
(http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/xinerama/xinerama/xc/doc/XineramaApi.txt?rev=1.2content-type=text/vnd.viewcvs-markup);
4) X.org Xinerama task force product (which isn't published).  Probably #3
and #4 are related, but I'm not sure.

_
  Dmitry Yu. Bolkhovityanov
  [EMAIL PROTECTED]
  The Budker Institute of Nuclear Physics


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Re: SGI Xinerama API

2001-09-26 Thread Matthias Clasen 
Very interesting link, I wasn't aware of the xinerama sourceforge project.

To add to your speculation regarding the relations between the xinerama
apis: Since the sourceforge project leader and the x org xinerama task force
chair are the same person and Mark V of xfree86 is also a sourceforge
project member, I guess there is hope for 2), 3) and 4) to converge.

Matthias

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