XcupGetReservedColormapEntries - list colormap entries reserved by the system

display   Specifies the connection to the X server.

       screen    Screen number on the host server.

       colors_out
                 Returns the values reserved by the server.

       ncolors   Returns the number of items in colors_out.

       The XcupGetReservedColormapEntries function returns a list of colormap entries (pixels) that are reserved
       by  the  system.  This  list will, at a minimum, contain entries for the BlackPixel and WhitePixel of the
       specified screen. Use XFree to free colors_out.

       To minimize colormap flash, an application which installs its  own  private  colormap  should  query  the
       special colors by calling XCupGetReservedColormapEntries, and can then store those entries (in the proper
       location) in its private colormap using XCupStoreColors.

       XcupGetReservedColormapEntries - list colormap entries reserved by the system

XcupQueryVersion(3Xext), XcupStoreColors(3Xext), XFree(3X11),
       ColormapUtilizationPolicyandExtension

X Version 11                                      libXext 1.3.4                                          XCUP(3)

cc [ flag ... ] file ... -lXext [ library ... ]
       #include <X11/extensions/Xcup.h>

       Status XcupGetReservedColormapEntries(Display *display,
              int screen, XColor **colors_out, int *ncolors);