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,  _Xconst  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

X Version 11                                      libX11 1.8.7                                 XcmsAllocColor(3)