This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
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 >______________________________________________________ >Get Your Private, Free Email at http://www.hotmail.com >