| color labrynth [message #29960] |
Tue, 26 March 2002 08:19 |
HILBERMAN
Messages: 7
Registered: July 2001
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Junior Member |
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Hello all,
I am caught in the middle of a 24-bit v. 8-bit ping pong match for color
graphics and my brain is starting to hurt. Need help.
THE PROBLEM: When I plot a perfectly beautiful, multi-color graph and
try to save it to a bitmap file, the color is either not preservered
(i.e. seems to revert to the B&W indexed color model?), or it is not
preserved AND the lines are faint to none. (Depending, it seems, on
whether or not I choose decomposed equal to 1 or 0.)
THE PLATFORM: I have been toying with the problem on a Sun Solaris 8,
although I have also bounced over to the IDL on my Windows 2000 to see
if it makes a difference (it doesn't).
As mentioned above, I have varied the device values (mainly Decomposed
and True_Color), but I haven't found a solution. Clearly, this arena
of 8-bit v. 24-bit color tables is new to me, and I would appreciate any
help you may have.
Here is a pseudo code of the type I have been playing with:
________________________________________________
pro test_plot
;******************************************
;Dummy variables and dummy functions to plot
;******************************************
x = indgen(50)
y = x^3
yy = x^2 + 2
;**********************************************
;device manipulation and color array definition
;**********************************************
device, True_Color = 24, Decomposed = 1
colarr = ['000000'XL, '7FABFF'XL, 'FF2200'XL]
;************
;Plot functions
;*************
plot, yy, background = 'FFFFFF'XL, color = colarr[2], $
linestyle = 0, Xstyle = 1, xtitle = 'Time (days)', $
ytitle = 'Discharge (m3/s)', title = 'Test1'
oplot, y, color = colarr[1], linestyle = 0
write_bmp, '~/test.bmp', tvrd()
end
~
___________________________________________________________
Even though I'm not clear on the correct usage of 'device', I have a
feeling
that the error stems from using tvrd() to write the bitmap????
Thanks,
Rachael
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