NAME

       XCreateFontCursor, XCreatePixmapCursor, XCreateGlyphCursor - create cursors

SYNTAX

       #include <X11/cursorfont.h>

       Cursor XCreateFontCursor(Display *display, unsigned int shape);

       Cursor   XCreatePixmapCursor(Display   *display,   Pixmap   source,  Pixmap  mask,  XColor
              *foreground_color, XColor *background_color, unsigned int x, unsigned int y);

       Cursor XCreateGlyphCursor(Display *display, Font source_font, Font mask_font, unsigned int
              source_char,  unsigned  int  mask_char,  XColor  _Xconst  *foreground_color, XColor
              _Xconst *background_color);

ARGUMENTS

       background_color
                 Specifies the RGB values for the background of the source.

       display   Specifies the connection to the X server.

       foreground_color
                 Specifies the RGB values for the foreground of the source.

       mask      Specifies the cursor's source bits to be displayed or None.

       mask_char Specifies the glyph character for the mask.

       mask_font Specifies the font for the mask glyph or None.

       shape     Specifies the shape of the cursor.

       source    Specifies the shape of the source cursor.

       source_char
                 Specifies the character glyph for the source.

       source_font
                 Specifies the font for the source glyph.

       x
       y         Specify the x and y coordinates, which indicate  the  hotspot  relative  to  the
                 source's origin.

DESCRIPTION

       X  provides  a set of standard cursor shapes in a special font named cursor.  Applications
       are encouraged to use this interface for their cursors because the font can be  customized
       for the individual display type.  The shape argument specifies which glyph of the standard
       fonts to use.

       The hotspot comes from the information stored in the cursor font.  The initial colors of a
       cursor are a black foreground and a white background (see XRecolorCursor).

       XCreateFontCursor can generate BadAlloc and BadValue errors.

       The  XCreatePixmapCursor  function  creates  a cursor and returns the cursor ID associated
       with  it.   The  foreground  and  background  RGB   values   must   be   specified   using
       foreground_color  and  background_color,  even  if  the  X server only has a StaticGray or
       GrayScale screen.  The foreground color is used for the pixels set to 1 in the source, and
       the background color is used for the pixels set to 0.  Both source and mask, if specified,
       must have depth one (or a BadMatch error  results)  but  can  have  any  root.   The  mask
       argument  defines  the  shape of the cursor.  The pixels set to 1 in the mask define which
       source pixels are displayed, and the pixels set to 0 define which pixels are ignored.   If
       no  mask  is given, all pixels of the source are displayed.  The mask, if present, must be
       the same size as the pixmap defined by the source argument, or a BadMatch  error  results.
       The hotspot must be a point within the source, or a BadMatch error results.

       The  components  of the cursor can be transformed arbitrarily to meet display limitations.
       The pixmaps can be freed immediately if no further explicit references to them are  to  be
       made.   Subsequent  drawing  in  the  source or mask pixmap has an undefined effect on the
       cursor.  The X server might or might not make a copy of the pixmap.

       XCreatePixmapCursor can generate BadAlloc and BadPixmap errors.

       The XCreateGlyphCursor function is similar to XCreatePixmapCursor except that  the  source
       and  mask  bitmaps are obtained from the specified font glyphs.  The source_char must be a
       defined glyph in source_font, or  a  BadValue  error  results.   If  mask_font  is  given,
       mask_char  must  be  a  defined  glyph  in  mask_font,  or  a BadValue error results.  The
       mask_font and character are optional.  The origins of the source_char  and  mask_char  (if
       defined)  glyphs  are positioned coincidently and define the hotspot.  The source_char and
       mask_char need not have the same bounding box metrics, and there is no restriction on  the
       placement  of  the  hotspot relative to the bounding boxes.  If no mask_char is given, all
       pixels of the source are displayed.   You  can  free  the  fonts  immediately  by  calling
       XFreeFont if no further explicit references to them are to be made.

       For  2-byte  matrix  fonts, the 16-bit value should be formed with the byte1 member in the
       most significant byte and the byte2 member in the least significant byte.

       XCreateGlyphCursor can generate BadAlloc, BadFont, and BadValue errors.

DIAGNOSTICS

       BadAlloc  The server failed to allocate the requested resource or server memory.

       BadFont   A value for a Font or GContext argument does not name a defined Font.

       BadMatch  Some argument or pair of arguments has the correct type and range but  fails  to
                 match in some other way required by the request.

       BadPixmap A value for a Pixmap argument does not name a defined Pixmap.

       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

       XDefineCursor(3), XLoadFont(3), XRecolorCursor(3)
       Xlib - C Language X Interface