| True Color, but !d.table_size eq 64? [message #23693] |
Fri, 09 February 2001 08:02  |
Alex Schuster
Messages: 124
Registered: February 1997
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Senior Member |
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Hi!
On our Ultrasparcs, with True Color display, I only get a color table
with 64 entries. I start IDL, open a window, and !d.table_size is 64,
not 256, or the value I pass via the colours keyword.
Any idea why this happens? Under Windows, it's always 256.
About all of my programs only need 8-bit color, so I used to do a
device, pseudo=8 to switch completele to 8-bit mode, and everything was
fine. But now I would like to use a true color display and
non-decomposed colors, but 64 coler cells is not enough. Hey, where's
the problem, there are plenty of colors, it's a true-color display after
all!
Maybe I found the only thing that's better in the Windows than in the
Unix version of IDL?
Alex
--
Alex Schuster Wonko@weird.cologne.de PGP Key available
alex@pet.mpin-koeln.mpg.de
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| Re: True Color, but !d.table_size eq 64? [message #23751 is a reply to message #23693] |
Wed, 14 February 2001 08:42  |
Alex Schuster
Messages: 124
Registered: February 1997
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Senior Member |
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Alex Schuster wrote:
>> non-decomposed colors, but 64 coler cells is not enough. Hey, where's
>> the problem, there are plenty of colors, it's a true-color display after
>> all!
>
> Um, it is not. I just forgot the DEVICE, TRUE_COLOR=24 statement. Silly
> me.
Okay, next question. Now that the True-Color Sun and the Windows PC
display exactly the same, I tried another PC, an SGI 320 running NT. It
has a 1600x1024 TFT display, maybe this has to do with the problem:
I start IDL (5.2), and enter XLOADCT. This opens the color dialog, and
shows the default grayscale color bar. But on the SGI, I see a cyan bar.
Looks like the red part of the color table is missing.
device, decomposed=0 & window & erase, 255 works fine, the window is
erased in white. But a tv, rebin( bindgen(256), 512, 512 ) shows cyan
colors, and no white.
Um, forget that, that was what just happened. Now that I try again, I
get red colors. After an XLOADCT, I get red and cyan colors. Next try.
This time, it's all cyan again. Oh well. I exited IDL after each try of
course.
What the heck is going on here? Probably some missing DEVICE,
/CORRECT_COLORS_ON_SGI or such.
Some information about the graphics stuff:
Cobalt graphics ChipSet A4
Driver Version 5.1.0
Alex
--
Alex Schuster Wonko@weird.cologne.de PGP Key available
alex@pet.mpin-koeln.mpg.de
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| Re: True Color, but !d.table_size eq 64? [message #23763 is a reply to message #23693] |
Tue, 13 February 2001 04:29 |
Alex Schuster
Messages: 124
Registered: February 1997
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Senior Member |
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Alex Schuster wrote:
> On our Ultrasparcs, with True Color display, I only get a color table
> with 64 entries. I start IDL, open a window, and !d.table_size is 64,
> not 256, or the value I pass via the colours keyword.
> Any idea why this happens? Under Windows, it's always 256.
>
> About all of my programs only need 8-bit color, so I used to do a
> device, pseudo=8 to switch completele to 8-bit mode, and everything was
> fine. But now I would like to use a true color display and
> non-decomposed colors, but 64 coler cells is not enough. Hey, where's
> the problem, there are plenty of colors, it's a true-color display after
> all!
Um, it is not. I just forgot the DEVICE, TRUE_COLOR=24 statement. Silly
me.
Alex
--
Alex Schuster Wonko@weird.cologne.de PGP Key available
alex@pet.mpin-koeln.mpg.de
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