XFT(3) UNIX Programmer's Manual XFT(3)
Xft - X FreeType interface library
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.
XftFont contains general font metrics and a pointer to
either the core XFontStruct data or a structure holding
FreeType and X Render Extension data.
XftDraw is an opaque object which holds information used to
render to an X drawable using either core protocol or the X
Rendering extension.
XftColor contains a pixel value and the ARGB values associ-
ated with it.
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 pat-
tern against the available 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,
FcChar8 *string,
int len,
XGlyphInfo *extents);
XftTextExtents8 computes the pixel extents of "string" when
drawn with "font".
XftDraw *
XftDrawCreate (Display *dpy,
Drawable drawable,
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XFT(3) UNIX Programmer's Manual XFT(3)
Visual *visual,
Colormap colormap);
XtDrawCreate creates a structure that can be used to render
text and rectangles to the screen.
void
XftDrawString8 (XftDraw *d,
XftColor *color,
XftFont *font,
int x,
int y,
FcChar8 *string,
int len);
XftDrawString8 draws "string" using "font" in "color" at "x,
y".
void
XftDrawRect (XftDraw *d,
XftColor *color,
int x,
int y,
unsigned int width,
unsigned int height);
XftDrawRect fills a solid rectangle in the specified color.
Bool
XftColorAllocName (Display *dpy,
Visual *visual,
Colormap cmap,
char *name,
XftColor *result);
XftColorAllocName allocates a XftColor structure. It asks
the X server to allocate a pixel and return the associated
RGB values wich are used to construct an XRenderColor . This
requires a round trip (bad).
Bool
XftColorAllocValue (Display *dpy,
Visual *visual,
Colormap cmap,
XRenderColor *color,
XftColor *result);
For TrueColor visuals, XftColorAllocValue computes the
nearest supported ARGB value and the associated pixel value
and stores them in the result. No round trip is required.
For non-TrueColor visuals, XftColorAllocValue asks the X
server to allocate the specified color and stores the
resulting pixel and ARGB values into result.
void
XftColorFree (Display *dpy,
Visual *visual,
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XFT(3) UNIX Programmer's Manual XFT(3)
Colormap cmap,
XftColor *color);
XftColorFree frees a color when it is no longer in use.
The Xft version 2 library uses fontconfig(3) for its confi-
guration. The XftConfig files are not used anymore.
As of version 2, Xft has become relatively stable and is
expected to retain source and binary compatibility in future
releases.
fontconfig(3)
/usr/X11R6/lib/X11/doc/README.fonts
Keith Packard, member of the XFree86 Project, Inc.
XFree86 Version 2.0 3
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