| Re: DirectColor on linux [message #17977] |
Tue, 23 November 1999 00:00  |
Vincent Favre-Nicolin
Messages: 8
Registered: November 1999
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Junior Member |
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David Fanning wrote:
>
> Vincent FAVRE-NICOLIN (favre@polycnrs-gre.fr) writes:
>
>> CONCLUSION : IMHO, it looks like DirectColor is *not possible* under
>> Linux with Xfree86 in 24,and 32 bpp (IDL does not work in 16bpp). Color
>> Table manipulation is thus only possible in 8bpp visual mode (a real
>> shame considering today's video cards...). There seems to be 3 ways out
>> of this problem :
>> 1) easiest, cheapest : use 8bpp mode
>
> UUghhh. What will your wife say about all that money you
> spent for equipment you said you absolutely NEEDED?
Yep, so we'll end up saying we desperatly NEED ;-) to buy solution
(3)
>> 2) harder : change the IDL program for a specific support of TrueColor
>> mode (ie you have to change the way you write colors when you *create*
>> the graphics, I haven't much experimented in that...)
>
> Perhaps a *bit* harder, but almost trivial these days, what
> with all the free stuff hanging around people's web
> pages. All you really have to do is figure out a way
> to re-display your graphics once you muck with the
> color table. There are any number of ways to do this,
> none of which would take more than 15 minutes to
> implement, I shouldn't think. In this case, it is
> probably nothing more than re-executing a TV command
> once the colors have been changed. Not too hard.
Right. My choice, too. Just a change of colors before TV/plot/whatever,
for most cases. It's clearly not *hard*, but just annoying since IDL
should work for all
platforms with very limited changes,and -IMHO-, without any change
between
one *nix to another. I will indeed be using this solution,and duplicate
every display/graphic procedure for TrueColor... That should't take more
than
2 hours for 3-4 procedures... But I have a feeling it will be a bit more
funny
when using XOR to display text (reversibly) over images. I'm in for some
groovy colors =-)
>> 3) expensive : buy a commercial X-Windows driver that supports
>> DirectColor in 24 or 32 bpp.
>
> Uh, uh. No. The boss ain't goin' for THAT solution! :-(
Probably not, but considering the price of IDL, it may not be
*so* expensive !! It mainly depends whether the IDL user is a programmer
or not...
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