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Re: 16-bit color [message #27963 is a reply to message #13547]

Mon, 12 November 2001 11:36

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

Unless you are using IDL 5.5 16 bit displays are not supported. AFAIK, only
8 and 24 bit displays are supported on IDL 5.4 and below. My guess is that
your previous workstation sported a 24 bpp display? Does your display
adapter support 24 bpp? Maybe you can add a few lines to your XFree config
file to include a 24bpp mode.

5.5 has improved support for "other" bit depths like 16 and 32.

-Rick

"James Kuyper" <kuyper@gscmail.gsfc.nasa.gov> wrote in message
news:3BF00F3F.831BD164@gscmail.gsfc.nasa.gov...
> I would like to display RGB images, with, for instance higher values for
> the Red component causing redder colors, and higher values of the blue
> component making them bluer. I used to be able to do that pretty easily,
> using the
>
> tv,image,/true
>
> However, since I've been moved to a Linux workstation, it doesn't work.
> I could provide detailed symptoms if you want, but it's obviously a
> configuration problem, so maybe the easiest way is to ask how I need to
> configure my IDL session to display these things properly. Attached is a
> copy of the xdpyinfo output for my system. What device commands should I
> use?
>
> --
> James Kuyper
> MODIS Level 1 Lead
> Science Data Support Team
> (301) 352-2150

------------------------------------------------------------ ----------------
----

> name of display: :0.0
> version number: 11.0
> vendor string: The XFree86 Project, Inc
> vendor release number: 3360
> maximum request size: 4194300 bytes
> motion buffer size: 256
> bitmap unit, bit order, padding: 32, LSBFirst, 32
> image byte order: LSBFirst
> number of supported pixmap formats: 2
> supported pixmap formats:
> depth 1, bits_per_pixel 1, scanline_pad 32
> depth 16, bits_per_pixel 16, scanline_pad 32
> keycode range: minimum 8, maximum 134
> focus: window 0x340000e, revert to PointerRoot
> number of extensions: 19
> BIG-REQUESTS
> DOUBLE-BUFFER
> DPMS
> LBX
> MIT-SCREEN-SAVER
> MIT-SHM
> MIT-SUNDRY-NONSTANDARD
> RECORD
> SECURITY
> SHAPE
> SYNC
> XC-APPGROUP
> XC-MISC
> XFree86-DGA
> XFree86-Misc
> XFree86-VidModeExtension
> XInputExtension
> XKEYBOARD
> XTEST
> default screen number: 0
> number of screens: 1
>
> screen #0:
> dimensions: 1152x864 pixels (390x293 millimeters)
> resolution: 75x75 dots per inch
> depths (1): 16
> root window id: 0x26
> depth of root window: 16 planes
> number of colormaps: minimum 1, maximum 1
> default colormap: 0x23
> default number of colormap cells: 64
> preallocated pixels: black 0, white 65535
> options: backing-store YES, save-unders YES
> largest cursor: 64x64
> current input event mask: 0xf8603f
> KeyPressMask KeyReleaseMask ButtonPressMask
> ButtonReleaseMask EnterWindowMask LeaveWindowMask
> ButtonMotionMask KeymapStateMask
SubstructureNotifyMask
> SubstructureRedirectMask FocusChangeMask PropertyChangeMask
> ColormapChangeMask
> number of visuals: 1
> default visual id: 0x22
> visual:
> visual id: 0x22
> class: TrueColor
> depth: 16 planes
> available colormap entries: 64 per subfield
> red, green, blue masks: 0xf800, 0x7e0, 0x1f
> significant bits in color specification: 6 bits
>

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[Message index]

		16-bit colors in Linux (Re: 24 bit colors in IDL) By: G. Hugh SONG on Thu, 19 November 1998 00:00
		Re: 16-bit colors in Linux (Re: 24 bit colors in IDL) By: davidf on Wed, 18 November 1998 00:00
		Re: 16-bit colors in Linux By: mallors on Fri, 20 November 1998 00:00
		Re: 16-bit color By: Nigel Wade on Wed, 14 November 2001 02:57
		Re: 16-bit color By: James Kuyper on Wed, 14 November 2001 09:09
		Re: 16-bit color By: Nigel Wade on Thu, 15 November 2001 06:10
		Re: 16-bit color By: James Kuyper on Tue, 13 November 2001 12:55
		Re: 16-bit color By: Paul van Delst on Tue, 13 November 2001 10:22
		Re: 16-bit color By: Rick Towler on Tue, 13 November 2001 09:30
		Re: 16-bit color By: Pavel A. Romashkin on Tue, 13 November 2001 08:51
		Re: 16-bit color By: James Kuyper on Tue, 13 November 2001 07:49
		Re: 16-bit color By: David Fanning on Mon, 12 November 2001 14:03
		Re: 16-bit color By: Logan Lindquist on Thu, 15 November 2001 05:18
		Re: 16-bit color By: Paul van Delst on Thu, 15 November 2001 06:57
		Re: 16-bit color By: Nigel Wade on Thu, 15 November 2001 06:33
		Re: 16-bit color By: James Kuyper on Mon, 12 November 2001 13:33
		Re: 16-bit color By: Rick Towler on Mon, 12 November 2001 11:36

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