cwm/font.c
2007-04-27 17:58:48 +00:00

160 lines
3.7 KiB
C

/*
* font.c - cwm font abstraction
*
* Copyright (c) 2005 Marius Eriksen <marius@monkey.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "hash.h"
#include "headers.h"
#include "calmwm.h"
static XftFont *_make_font(struct screen_ctx *sc, struct fontdesc *fdp);
HASH_GENERATE(fonthash, fontdesc, node, fontdesc_cmp);
int
fontdesc_cmp(struct fontdesc *a, struct fontdesc *b)
{
return strcmp(a->name, b->name);
}
/*
* Fowler/Noll/Vo hash
* http://www.isthe.com/chongo/tech/comp/fnv/
*/
#define FNV_P_32 ((unsigned int)0x01000193) /* 16777619 */
#define FNV_1_32 ((unsigned int)0x811c9dc5) /* 2166136261 */
unsigned int
fontdesc_hash(struct fontdesc *fdp)
{
const unsigned char *p, *end, *start;
unsigned int hash = FNV_1_32;
start = fdp->name;
end = (const unsigned char *)fdp->name + strlen(fdp->name);
for (p = start; p < end; p++) {
hash *= FNV_P_32;
hash ^= (unsigned int)*p;
}
return (hash);
}
void
font_init(struct screen_ctx *sc)
{
XColor xcolor, tmp;
HASH_INIT(&sc->fonthash, fontdesc_hash);
sc->xftdraw = XftDrawCreate(G_dpy, sc->rootwin,
DefaultVisual(G_dpy, sc->which), DefaultColormap(G_dpy, sc->which));
if (sc->xftdraw == NULL)
errx(1, "XftDrawCreate");
if (!XAllocNamedColor(G_dpy, DefaultColormap(G_dpy, sc->which),
"black", &xcolor, &tmp))
errx(1, "XAllocNamedColor");
sc->xftcolor.color.red = xcolor.red;
sc->xftcolor.color.green = xcolor.green;
sc->xftcolor.color.blue = xcolor.blue;
sc->xftcolor.color.alpha = 0x00ff00;
sc->xftcolor.pixel = xcolor.pixel;
}
struct fontdesc *
font_getx(struct screen_ctx *sc, const char *name)
{
struct fontdesc *fdp;
if ((fdp = font_get(sc, name)) == NULL)
errx(1, "font_get()");
return (fdp);
}
struct fontdesc *
font_get(struct screen_ctx *sc, const char *name)
{
struct fontdesc fd, *fdp;
XftFont *fn;
fd.name = name;
if ((fdp = HASH_FIND(fonthash, &sc->fonthash, &fd)) == NULL
&& (fn = _make_font(sc, &fd)) != NULL) {
fdp = xmalloc(sizeof(*fdp));
fdp->name = xstrdup(fd.name);
fdp->fn = fn;
fdp->sc = sc;
HASH_INSERT(fonthash, &sc->fonthash, fdp);
}
return (fdp);
}
int
font_width(struct fontdesc *fdp, const char *text, int len)
{
XGlyphInfo extents;
XftTextExtents8(G_dpy, fdp->fn, (const XftChar8*)text, len, &extents);
return (extents.xOff);
}
void
font_draw(struct fontdesc *fdp, const char *text, int len,
Drawable d, int x, int y)
{
XftDrawChange(fdp->sc->xftdraw, d);
/* Really needs to be UTF8'd. */
XftDrawString8(fdp->sc->xftdraw, &fdp->sc->xftcolor, fdp->fn, x, y,
(const FcChar8*)text, len);
}
int
font_ascent(struct fontdesc *fdp)
{
return fdp->fn->ascent;
}
int
font_descent(struct fontdesc *fdp)
{
return fdp->fn->descent;
}
static XftFont *
_make_font(struct screen_ctx *sc, struct fontdesc *fdp)
{
XftFont *fn = NULL;
FcPattern *pat, *patx;
XftResult res;
if ((pat = FcNameParse(fdp->name)) == NULL)
return (NULL);
if ((patx = XftFontMatch(G_dpy, sc->which, pat, &res)) != NULL)
fn = XftFontOpenPattern(G_dpy, patx);
FcPatternDestroy(pat);
return (fn);
}