20000302: Gempak colors

Ka Kit,

As we thought, your display is set for 24buit true color instead of pseudocolor.

> default visual id:  0x20
>    visual id:    0x20
>    class:    TrueColor


Your documentation for that software should show you how to
configure it. You can configure your X software to provide
both 24 bit color and 8 bit color- the point here is that the "default"
visual will have to be 8 bit for Gempak to run. Other software like
can use the 24 bit color planes. McIDAS will work properly with
8 bit default visuals.

The downside to 8 bit colo is that uyou only have 256 colors instead
of 16 million. But that is the only way to run Gempak.

Steve Chiswell
Unidata User Support





>From: "Ka Kit Lai" <address@hidden>
>Organization: .
>Keywords: 200003021540.IAA03729

>Steve:
>   The following is the output from xdpyinfo:
>
>name of display:    134.74.64.12:0.0
>version number:    11.0
>vendor string:    MIT X Consortium
>vendor release number:    5000
>maximum request size:  262140 bytes
>motion buffer size:  0
>bitmap unit, bit order, padding:    32, LSBFirst, 32
>image byte order:    LSBFirst
>number of supported pixmap formats:    1
>supported pixmap formats:
>    depth 32, bits_per_pixel 32, scanline_pad 32
>keycode range:    minimum 1, maximum 246
>focus:  PointerRoot
>number of extensions:    0
>default screen number:    0
>number of screens:    1
>
>screen #0:
>  dimensions:    794x575 pixels (169x127 millimeters)
>  resolution:    119x115 dots per inch
>  depths (2):    1, 32
>  root window id:    0x24
>  depth of root window:    32 planes
>  number of colormaps:    minimum 1, maximum 1
>  default colormap:    0x22
>  default number of colormap cells:    256
>  preallocated pixels:    black 0, white 16777215
>  options:    backing-store YES, save-unders YES
>  largest cursor:    unlimited
>  current input event mask:    0xd0001d
>KeyPressMask             ButtonPressMask          ButtonReleaseMask
>EnterWindowMask          SubstructureRedirectMask PropertyChangeMask
>ColormapChangeMask
>  number of visuals:    1
>  default visual id:  0x20
>  visual:
>    visual id:    0x20
>    class:    TrueColor
>    depth:    32 planes
>    available colormap entries:    256 per subfield
>    red, green, blue masks:    0xff, 0xff00, 0xff0000
>    significant bits in color specification:    8 bits
>
>First of all, do you know how can I change the color class to Pseudocolor 
>because I see this display drive only support high and true color. Second of 
>all, if I change the configuration of the display, will that affect some 
>other application running on that PC? Or will that affect the Mcidas running 
>on this PC too? Thank you.
>
>                                    Ka Kit Lai
>>From: Unidata Support <address@hidden>
>>To: "Ka Kit Lai" <address@hidden>
>>CC: address@hidden
>>Subject: 20000301: Gempak
>>Date: Wed, 01 Mar 2000 14:52:25 -0700
>>
>>Ka Kit,
>>
>>Gempak requires the X display to be running the default visual id
>>in 8 bit pseudocolor mode. You should be able to see if this
>>is the case using the xdpyinfo command to that display.
>>
>>If you are using a truecolor visual for that default display,
>>you will have to reconfigure it.
>>
>>An example of a previous message dealing with this same issue is shown at:
>>
>>http://www.unidata.ucar.edu/glimpse/gempak/3373
>>http://www.unidata.ucar.edu/glimpse/gempak/3369
>>
>>Steve Chiswell
>>Unidata User Support
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