XFT(3)							     Library Functions Manual							    XFT(3)

NAME

	XFT - X FreeType interface library

DESCRIPTION

       Xft  is	a  simple library designed to interface the FreeType rasterizer with the X Rendering Extension.  This manual page barely scratches
       the surface of this library.

DATATYPES

       XftPattern holds a set of names with associated value lists; each name refers to a property of a font.  XftPatterns are used as	inputs	to
       the matching code as well as holding information about specific fonts.

       XftFont contains general font metrics and a pointer to either the core XFontStruct data or a structure holding FreeType and X Render Exten-
       sion data.

       XftFontStruct contains information about FreeType fonts used with the X Render Extension.

       XftFontSet contains a list of XftPatterns.  Internally Xft uses this data structure to hold sets of fonts.   Externally,  Xft  returns  the
       results of listing fonts in this format.

       XftObjectSet holds a set of names and is used to specify which fields from fonts are placed in the the list of returned patterns when list-
       ing fonts.

       XftDraw is an opaque object which holds information used to render to an X drawable using either core protocol or the  X  Rendering  exten-
       sion.

FUNCTIONS

       XftFont *
       XftFontOpen (Display *dpy, int screen, ...);
       XftFontOpen  takes a list of pattern elements of the form (field, type, value) terminated with a 0, matches that pattern against the avail-
       able fonts and opens the matching font.

       Example:
	    font = XftFontOpen (dpy, scr,		     XFT_FAMILY, XftTypeString,  "charter",			 XFT_SIZE,  XftTypeDouble,
       12.0);

       This  opens  the charter font at 12 points.  The point size is automatically converted to the correct pixel size based on the resolution of
       the monitor.

       void
       XftTextExtents8 (Display *dpy,
		  XftFont  *font,
		  unsigned char  *string,
		  int	   len,
		  XGlyphInfo	*extents);
       XftTextExtents8 computes the pixel extents of "string" when drawn with "font".

       XftDraw *
       XftDrawCreate (Display	*dpy,
		   Drawable  drawable,
		   Visual    *visual,
		   Colormap  colormap);
       XtDrawCreate creates a structure that can be used to render text and rectangles to the screen.

       void
       XftDrawString8 (XftDraw	     *d,
		 XRenderColor	*color,
		 XftFont	*font,
		 int	   x,
		 int	   y,
		 unsigned char	*string,
		 int	   len);
       XftDrawString8 draws "string" using "font" in "color" at "x, y".

       void
       XftDrawRect (XftDraw	    *d,
		 XRenderColor	*color,
		 int	  x,
		 int	  y,
		 unsigned int	width,
		 unsigned int	height);
       XftDrawRect fills a solid rectangle in the specified color.

XftConfig
       The XftConfig file contains configuration information for the Xft library consisting of directories to look at for font information as well
       as instructions on editing program specified font patterns before attempting to match the available fonts.

       config	 :   "dir" STRING
	    |	"include" STRING
	    |	"includeif" STRING
	    |	"match" tests "edit" edits
	    ;
       test :	qual FIELD-NAME COMPARE CONSTANT
	    ;
       qual :	"any"
	    |	"all"
	    ;
       edit :	FIELD-NAME ASSIGN expr SEMI
	    ;

       STRINGs	are  double-quote  delimited.  FIELD-NAMEs are identifiers, ASSIGN is one of "=", "+=" or "=+".  expr can contain the usual arith-
       metic operators and can include FIELD-NAMEs.

       "dir" adds a directory to the list of places Xft will look for fonts.  There is no particular order implied by the  list;  Xft  treats  all
       fonts about the same.

       "include"  and "includeif" cause Xft to load more configuration parameters from the indicated file.  "includeif" doesn't elicit a complaint
       if the file doesn't exist.  If the file name begins with a '~' character, it refers to a path relative to the home directory of the user.

       If the tests in a "match" statement all match a user-specified pattern, the pattern will be edited with the specified instructions.

       Where ASSIGN is "=", the matching value in the pattern will be replaced by the given expression.  "+="/"=+" will prepend/append a new value
       to the list of values for the indicated field.

COMPATIBILITY

       As of version 2, Xft has become relatively stable and is expected to retain source and binary compatibility in future releases.

AUTHOR

       Keith Packard, member of the XFree86 Project, Inc.

XFree86 							    Version 1.0 							    XFT(3)