XStoreColor(3)


NAME

   XStoreColors, XStoreColor, XStoreNamedColor - set colors

SYNTAX

   int XStoreColors(Display *display, Colormap colormap, XColor color[],
          int ncolors);

   int XStoreColor(Display *display, Colormap colormap, XColor *color);

   int XStoreNamedColor(Display *display, Colormap colormap, char *color,
          unsigned long pixel, int flags);

ARGUMENTS

   color     Specifies the pixel and RGB values or the color name string
             (for example, red).

   color     Specifies an array of color definition structures to be
             stored.

   colormap  Specifies the colormap.

   display   Specifies the connection to the X server.

   flags     Specifies which red, green, and blue components are set.

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

   pixel     Specifies the entry in the colormap.

DESCRIPTION

   The XStoreColors function changes the colormap entries of the pixel
   values specified in the pixel members of the XColor structures.  You
   specify which color components are to be changed by setting DoRed,
   DoGreen, and/or DoBlue in the flags member of the XColor structures.
   If the colormap is an installed map for its screen, the changes are
   visible immediately.  XStoreColors changes the specified pixels if they
   are allocated writable in the colormap by any client, even if one or
   more pixels generates an error.  If a specified pixel is not a valid
   index into the colormap, a BadValue error results.  If a specified
   pixel either is unallocated or is allocated read-only, a BadAccess
   error results.  If more than one pixel is in error, the one that gets
   reported is arbitrary.

   XStoreColors can generate BadAccess, BadColor, and BadValue errors.

   The XStoreColor function changes the colormap entry of the pixel value
   specified in the pixel member of the XColor structure.  You specified
   this value in the pixel member of the XColor structure.  This pixel
   value must be a read/write cell and a valid index into the colormap.
   If a specified pixel is not a valid index into the colormap, a BadValue
   error results.  XStoreColor also changes the red, green, and/or blue
   color components.  You specify which color components are to be changed
   by setting DoRed, DoGreen, and/or DoBlue in the flags member of the
   XColor structure.  If the colormap is an installed map for its screen,
   the changes are visible immediately.

   XStoreColor can generate BadAccess, BadColor, and BadValue errors.

   The XStoreNamedColor function looks up the named color with respect to
   the screen associated with the colormap and stores the result in the
   specified colormap.  The pixel argument determines the entry in the
   colormap.  The flags argument determines which of the red, green, and
   blue components are set.  You can set this member to the bitwise
   inclusive OR of the bits DoRed, DoGreen, and DoBlue.  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.  If the specified pixel is not a valid index into the colormap,
   a BadValue error results.  If the specified pixel either is unallocated
   or is allocated read-only, a BadAccess error results.

   XStoreNamedColor can generate BadAccess, BadColor, BadName, and
   BadValue errors.

DIAGNOSTICS

   BadAccess A client attempted to free a color map entry that it did not
             already allocate.

   BadAccess A client attempted to store into a read-only color map entry.

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

   BadName   A font or color of the specified name does not exist.

   BadValue  Some numeric value falls outside the range of values accepted
             by the request.  Unless a specific range is specified for an
             argument, the full range defined by the argument's type is
             accepted.  Any argument defined as a set of alternatives can
             generate this error.

SEE ALSO

   XAllocColor(3), XCreateColormap(3), XQueryColor(3)
   Xlib - C Language X Interface





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