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