|
Table of Contents
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 associated 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 pattern 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,
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,
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 configuration. 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.
fonttconfig(3)
/usr/X11R6/lib/X11/doc/README.fonts
Keith Packard, member of the XFree86
Project, Inc.
Table of Contents
|
