[comp.windows.x] Standard Colormaps

dave@Solbourne.COM (Dave Plunkett) (09/16/89)

Is there an Xlib interface for finding a named color 
on a standard colormap?  For example, can I get the pixel 
value for color "Blue" on the standard colormap RGB_BLUE_MAP?  
How about colors that don't match exactly?  Can I find an 
approximation to the color "Aquamarine" on the RGB_BEST_MAP?

Dave Plunkett                         Solbourne Computer, Inc.
dave@solbourne.com                    1900 Pike Road
{boulder,nbires,sun}!stan!dave        Longmont, CO 80501

rws@EXPO.LCS.MIT.EDU (Bob Scheifler) (09/18/89)

    Is there an Xlib interface for finding a named color 
    on a standard colormap?

No.  You'll have to use XLookupColor or XParseColor and then do the mapping.

dave@Solbourne.COM (Dave Plunkett) (09/19/89)

Some PEX application/server combinations may require the use of the
RGB_BEST_MAP.  Is there any agreed upon way that a user can suggest 
to other clients that they also use this colormap?  

Looking For a Way to Reduce Colormap Thrashing,
dave

rws@EXPO.LCS.MIT.EDU (Bob Scheifler) (10/11/89)

No real support was provide in R2 or R3 for creating standard colormaps,
only for reading them back once created.  There will be creation support
in R4.

cristy@eplrx7.uucp (John Cristy) (06/07/90)

  I need examples of standard colormap attributes from different X
  servers to help me implement standard colormap code.  Could someone
  Email me the 'properties' file produced on your server from these 
  commands:

      xstdcmap -all
      xprop -root > properties

  I am particularly interested in the results from 24/32 bit servers.
  Thanks muchly in advance.

  cristy@dupont.com
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