hpux man page for xquerycolob

XQueryColors()															    XQueryColors()

Name
  XQueryColors - obtain RGB values for an array of colorcells.

Synopsis
  XQueryColors(display, colormap, defs_in_out, ncolors)
	Display *display;
	Colormap colormap;
	XColor defs_in_out[ncolors];
	int ncolors;

Arguments
  display   Specifies a connection to an X server; returned from XOpenDisplay().

  colormap  Specifies the ID of the colormap from which RGB values will be retrieved.

  defs_in_out
	    Specifies  an  array  of XColor structures.  In each one, pixel is set to indicate which colorcell in the colormap to return, and
	    the RGB values in that colorcell are returned in red, green, and blue.

  ncolors   Specifies the number of XColor structures in the color definition array.

Description
  XQueryColors() is similar to XQueryColor(), but it returns an array of RGB values.  It returns the RGB values in colormap colormap for each
  colorcell corresponding to the pixel value specified in the pixel member of each XColor structure in the colorcell_def array.  The RGB val-
  ues are returned in the red, green, and blue members of that same structure, and sets the flags member in each XColor structure  to  (DoRed
  DoGreen   DoBlue).

  For more information, see Volume One, Chapter 7, Color.

Structures
     typedef struct {
	 unsigned long pixel;
	 unsigned short red, green, blue;
	 char flags;	    /* DoRed, DoGreen, DoBlue */
	 char pad;
     } XColor;

Errors
  BadColor  Invalid colormap.

  BadValue  Pixel not valid index into colormap.

  Note:  if more than one pixel value is in error, the one reported is arbitrary.

See Also
  XBlackPixel(),  XWhitePixel(),  XAllocColor(),  XAllocColorCells(), XAllocColorPlanes(), XAllocNamedColor(), XFreeColors(), XLookupColor(),
  XParseColor(), XQueryColor(), XStoreColor(), XStoreColors(), XStoreNamedColor().

Xlib - Color Cells														    XQueryColors()