| Re: can't change colortable in current window (linux bpp24) [message #16355 is a reply to message #16290] |
Tue, 20 July 1999 00:00   |
David R. Klassen
Messages: 14
Registered: December 1996
|
Junior Member |
|
|
"J.D. Smith" wrote:
>
> David Fanning wrote:
>>
>> Liam Gumley (Liam.Gumley@ssec.wisc.edu) writes:
>>
>>> I just tried starting IDL on a colleague's laptop running AcceleratedX
>>> V4.1 in 16 bpp mode. It refused to run IDL in PseudoColor (8-bit) mode,
>>> and started in TrueColor mode instead (I verified this using 'device,
>>> get_visual_name=name' to check it wasn't in DirectColor mode). The
>>> commands
>>>
>>> device, decomp=0, retain=2
>>> loadct, 0
>>> tvscl, dist(256)
>>>
>>> gave a strange rainbow of colors, which did not change when I clicked on
>>> the graphics window. I'm going to have to investigate this further, but
>>> it looks like starting the Linux X server with either
>>>
>>> startx -- -bpp 8
>>>
>>> or
>>>
>>> startx -- -bpp 24
>>>
>>> is required for reliable IDL operation under Linux. If anyone knows
>>> otherwise, please let me know.
>>
>> As far as I know, IDL on Linux has *never* been supported in
>> 16-bit mode. Nor have I ever heard any plans for it to be so
>> supported. I think these are the only two valid options.
>
> He's talking about using an 8-bit pseudo overlay in an otherwise 24-bit
> environment... as can be done on all SGI's, for instance. Many video
> cards can do this, but Linux software support of this feature is a bit
> lacking.
>
> JD
>
> --
> J.D. Smith |*| WORK: (607) 255-5842
> Cornell University Dept. of Astronomy |*| (607) 255-6263
> 304 Space Sciences Bldg. |*| FAX: (607) 255-5875
> Ithaca, NY 14853 |*|
This is odd...when I was testing things for my use under linux I put the
following lines in my .Xdefaults file:
! IDL defaults
idlde.colors: 256
Idl.colors: 256
idl.gr_visual: PseudoColor
idl.gr_depth: 8
and I get 8-bit color windows under 24-bit displays. Granted, I did
that
test awhile ago so my memory may be slipping a bit.
I don't like the 1280x1024 resolution I get with 24-bit so I run in
16-bit at 1600x1200 and run IDL under a second X session by opening an
xterm and typing:
alias 8bit='startx .xinitrc.8bit -- :1 -bpp 8 &'
The file .xinitrc.8bit is used so the default window manager (KDE) is
*not* used on :1 as it interferes with the K running on :0 so I run
just a barebones twm on :1. For completeness, the .xinirc.8bit is:
nxterm -n IDL_EDIT -fn 9x15 -geom 95x52+200+20 -fg black -bg
LightYellow &
nxterm -n WORK_DIR -fn 9x15 -geom 95x52+10+280 -fg black -bg
LightYellow &
nxterm -n IDL_RUN -fn 9x15 -geom 95x52+655+220 -fg black -bg
LightGoldenrod &
twm -d :1
(the colors are so that when I get the color flash I can still sorta
read text in
the window - it's not perfect and needs tweaking...)
--
David R. Klassen
Department of Chemistry & Physics
Rowan University
201 Mullica Hill Road
Glassboro, NJ 08028
856-256-4500 x3273
http://elvis.rowan.edu/~klassen/
klassen@rowan.edu
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
