| tvrd and device,decomposed=0 [message #19778] |
Wed, 26 April 2000 00:00 |
R.Bauer
Messages: 1424
Registered: November 1998
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Senior Member |
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Hi David and all others,
This may be again a favourite question about color problems, I hope not.
If I have a true color table and I have set device,decomposed=0
the online help says:
Online Help:
"Set this keyword to 0 to cause the least-significant 8 bits of the
color index value to be interpreted as a PseudoColor index.
This setting allows users with DirectColor and TrueColor displays
to use IDL programs written for standard, PseudoColor displays
without modification."
WITHOUT MODIFICATION: :-(
=====================
I have to use tvrd() by the true=1 keyword.
The TVLCT,red,green,blue,/get returns colors which I have to translate
by
color_quan to pseudocolor.
I don't know how I get the same colors by color_quan as someone using
only 8-Bit colors.
If the device graphics mode is changed from 3 to 6 and back the colors
are mixed. This did not happen if I have used 8-Bit colors.
Why are the results of tvrd and tvlct not itself changed automaticly
to pseudo_color?
R.Bauer
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