[GRASS5] Non-HTML: Grass on CYGWIN/WIN32 - IPC Version Status Update

[Markus Neteler]

Hey Malcolm,

this really looks like a break-through!! Congrats for this first
approach to get the XDRIVER running.
I keep the fingers crossed for the next time,

 Markus


On Thu, Jan 04, 2001 at 07:41:27PM -0400, Malcolm Blue wrote:
> Oops,  I sent that as HTML mail, which some readers may not like.
> Sorry.
> 
> Malcolm Blue wrote:
> 
> > Good news and bad news...
> >
> > GOOD (for WinNT users):
> >
> > 1.  Looks like I'm over the major hurdles in the IPC code.  I have
> > several changes to send to the maintainer, but I am able to get the
> > IPC Message Queues to connect/send/receive/disconnect.  (Still more to
> > do: clean up code a bit,  increase the number of queues and increase
> > message buffer sizes look like the first priority, but these should be
> > simple changes.)
> >
> >
> > 2.  d.mon programs (start, select, stop) are working for me, as well
> > as a VERY limited set of display commands on WinNT.  I still have some
> > minor clean up and testing to do to make sure they are ready for
> > testing by others.
> >
> > 3. d.erase and d.zoom seem to work.  d.erase erased the little that
> > drew with d.rast, and d.zoom did a proper zoom for the little band of
> > pixels that d.rast created (see below), with a cursor, the zoom
> > "rubber band" box and the coordinates and prompts in the command
> > window were in sync with the graphics window operations.  Probably a
> > number of other commands will work as well.
> >
> > In order to run "d.mon select" without code changes, I had to remove
> > the "#ifndef _CYGWIN_"  and "#endif" statements that were in the
> > switch statement in
> > src/display/devices/XDRIVER/XDRIVER24/ipc.new/switcher.c , i.e.
> > sandwiching the FONT and TEXT case blocks.  Does anyone know why these
> > cases were being excluded?  Is this a relic from the old XFree port?
> > These blocks of code seem to compile fine, and the "case FONT" code
> > block works with the recent XFree release for Cygwin.  I think this
> > should be changed for both the original (fifo) version and the ipc
> > version.
> >
> >
> > BAD:
> >
> > 1. Limited success with the d.rast command.  It only seems to draw the
> > NULL's.  Using the Spearfish sample data, I did:
> >
> >
> >      d.rast soils bg=yellow    - it draws a yellow band near the
> >      bottom of the X0 monitor window (several pixels wide and the
> >      width of the window).
> >      d.rast soils bg=white     - it draws a white band where the
> >      yellow band was.
> >      d.rast streams bg=red    - it draws a red band over the
> >      bottom part of the white band
> >
> >      From these and additional tests I am guessing that just the
> >      NULL pixels are being drawn.  Does this sound right?
> >      BTW: It was based on this limited result that I was able to
> >      test d.erase and d.zoom
> >
> > 2.  d.vect, d.sites and d.legend  all hang up.  They had to be killed
> > from a separate window.
> >
> > 3.  Win98 did not work.  The IPC code by itself tested OK, but the
> > d.mon commands were hanging up.  WinNT was used for the limited
> > successes above.
> >
> >
> >
> > I will keep looking at the IPC code and do the minor changes I
> > mentioned above.  I also plan to keep on looking into the d.rast
> > problems to see if I can get this working.  Suggestions are welcome.
> >
> >
> > Malcolm
> >
> >
> >
> >
> 
> 
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-- 
Markus Neteler *  University of Hannover
Institute of Physical Geography and Landscape Ecology
Schneiderberg 50 * D-30167 Hannover * Germany
Tel: ++49-(0)511-762-4494  Fax: -3984

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