NAME

       XcmsAllocColor, XcmsAllocNamedColor - allocate colors

SYNTAX

       Status   XcmsAllocColor(Display  *display,  Colormap  colormap,  XcmsColor  *color_in_out,
              XcmsColorFormat result_format);

       Status  XcmsAllocNamedColor(Display  *display,  Colormap  colormap,  char   *color_string,
              XcmsColor   *color_screen_return,  XcmsColor  *color_exact_return,  XcmsColorFormat
              result_format);

ARGUMENTS

       display   Specifies the connection to the X server.

       colormap  Specifies the colormap.

       color_exact_return
                 Returns the color specification parsed from the color string or parsed from  the
                 corresponding string found in a color-name database.

       color_in_out
                 Specifies the color to allocate and returns the pixel and color that is actually
                 used in the colormap.

       color_screen_return
                 Returns the pixel value of the color cell and color specification that  actually
                 is  stored  for  that  cell.   Specifies the color string whose color definition
                 structure is to be returned.

       result_format
                 Specifies the color format for the returned color specification.

DESCRIPTION

       The XcmsAllocColor function is similar to XAllocColor except the color can be specified in
       any  format.  The XcmsAllocColor function ultimately calls XAllocColor to allocate a read-
       only color cell (colormap entry) with the specified color.  XcmsAllocColor first  converts
       the  color  specified to an RGB value and then passes this to XAllocColor.  XcmsAllocColor
       returns the pixel value of the color cell and the color specification actually  allocated.
       This  returned  color  specification is the result of converting the RGB value returned by
       XAllocColor into the format specified with the result_format argument.   If  there  is  no
       interest  in  a  returned  color specification, unnecessary computation can be bypassed if
       result_format is set to XcmsRGBFormat.  The corresponding colormap cell is read-only.   If
       this routine returns XcmsFailure, the color_in_out color specification is left unchanged.

       XcmsAllocColor can generate a BadColor errors.

       The  XcmsAllocNamedColor  function  is  similar  to XAllocNamedColor except that the color
       returned can be in any format specified.  This function ultimately  calls  XAllocColor  to
       allocate  a  read-only  color  cell with the color specified by a color string.  The color
       string is parsed into an XcmsColor structure (see XcmsLookupColor), converted  to  an  RGB
       value,  and  finally passed to XAllocColor.  If the color name is not in the Host Portable
       Character Encoding, the result is implementation-dependent.  Use of uppercase or lowercase
       does not matter.

       This  function  returns  both  the  color  specification  as  a  result  of parsing (exact
       specification) and the actual color specification  stored  (screen  specification).   This
       screen  specification  is  the  result of converting the RGB value returned by XAllocColor
       into the format specified in result_format.  If there is no interest in a  returned  color
       specification,  unnecessary  computation  can  be  bypassed  if  result_format  is  set to
       XcmsRGBFormat.  If color_screen_return and color_exact_return point to the same structure,
       the pixel field will be set correctly, but the color values are undefined.

       XcmsAllocNamedColor can generate a BadColor errors.

DIAGNOSTICS

       BadColor  A value for a Colormap argument does not name a defined Colormap.

SEE ALSO

       XcmsQueryColor(3), XcmsStoreColor(3)
       Xlib - C Language X Interface