| Re: IDL and color table allocation [message #5622] |
Fri, 19 January 1996 00:00  |
David Foster
Messages: 341
Registered: January 1996
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Senior Member |
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daniele@saxpds2.tesre.bo.cnr.it (Daniele Dal Fiume) wrote:
>
> (I hope this is not a FAQ....)
>
> We have a DEC ULTRIX 5000/200 workstation, running IDL 4.0.1
> We notice an unpleasant problem: colors are flashing when we go in and
> out of the graphic window (X11). This is due to the fact that IDL
> allocates a private colormap, separate from that of the window manager.
> The depth of the display is 24 bits.
>
> Does anybody know how to force IDL to use the same color map of the
> window manager (mwm) on an ULTRIX workstation with a graphic display
> whose depth is 24 bits? And how to limit it to only 256 colors?
> (using "idl.colors: [-]256" in the app-default file is not working...)
On our Sparc [2,10,20] systems we put the line:
idl.gr_visual: PseudoColor
You might try also:
idl.gr_depth: 8
in the /usr/openwin/lib/Xdefaults file (or in a user's .Xdefaults
file), and this seems to work. Here is our output from
help, /device :
IDL> help, /device
Available graphics_devices: CGM HP LJ NULL PCL PS REGIS TEK X Z
Current graphics device: X
Server: X11.0, Sun Microsystems, Inc., Release 3300
Display Depth, Size: 8 bits, (1152,900)
Visual Class: PseudoColor (3)
Bits Per RGB: 8
Physical Color Map Entries (Used / Total): 223 / 256
Colormap: Shared, 223 colors. Translation table: Enabled
Graphics pixels: Combined, Dither Method: Ordered
Write Mask: 255 (decimal) ff (hex)
Graphics Function: 3 (copy)
Current Font: <default>
Default Backing Store: Req from Server.
IDL>
We also issue a
SET_PLOT, 'X'
in the startup file. It sounds like you may have tried all this
stuff already, so I don't know if this is useful.
Dave Foster
Brain Image Analysis Lab, UCSD
foster@bial1.ucsd.edu
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