1 /* See LICENSE file for copyright and license details. */
6 #include <X11/Xft/Xft.h>
11 #define UTF_INVALID 0xFFFD
14 static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
15 static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
16 static const long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
17 static const long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
20 utf8decodebyte(const char c, size_t *i)
22 for (*i = 0; *i < (UTF_SIZ + 1); ++(*i))
23 if (((unsigned char)c & utfmask[*i]) == utfbyte[*i])
24 return (unsigned char)c & ~utfmask[*i];
29 utf8validate(long *u, size_t i)
31 if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
33 for (i = 1; *u > utfmax[i]; ++i)
39 utf8decode(const char *c, long *u, size_t clen)
41 size_t i, j, len, type;
47 udecoded = utf8decodebyte(c[0], &len);
48 if (!BETWEEN(len, 1, UTF_SIZ))
50 for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
51 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
64 drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h)
66 Drw *drw = ecalloc(1, sizeof(Drw));
73 drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen));
74 drw->gc = XCreateGC(dpy, root, 0, NULL);
75 XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);
81 drw_resize(Drw *drw, unsigned int w, unsigned int h)
89 XFreePixmap(drw->dpy, drw->drawable);
90 drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));
96 XFreePixmap(drw->dpy, drw->drawable);
97 XFreeGC(drw->dpy, drw->gc);
98 drw_fontset_free(drw->fonts);
102 /* This function is an implementation detail. Library users should use
103 * drw_fontset_create instead.
106 xfont_create(Drw *drw, const char *fontname, FcPattern *fontpattern)
109 XftFont *xfont = NULL;
110 FcPattern *pattern = NULL;
113 /* Using the pattern found at font->xfont->pattern does not yield the
114 * same substitution results as using the pattern returned by
115 * FcNameParse; using the latter results in the desired fallback
116 * behaviour whereas the former just results in missing-character
117 * rectangles being drawn, at least with some fonts. */
118 if (!(xfont = XftFontOpenName(drw->dpy, drw->screen, fontname))) {
119 fprintf(stderr, "error, cannot load font from name: '%s'\n", fontname);
122 if (!(pattern = FcNameParse((FcChar8 *) fontname))) {
123 fprintf(stderr, "error, cannot parse font name to pattern: '%s'\n", fontname);
124 XftFontClose(drw->dpy, xfont);
127 } else if (fontpattern) {
128 if (!(xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {
129 fprintf(stderr, "error, cannot load font from pattern.\n");
133 die("no font specified.");
136 /* Do not allow using color fonts. This is a workaround for a BadLength
137 * error from Xft with color glyphs. Modelled on the Xterm workaround. See
138 * https://bugzilla.redhat.com/show_bug.cgi?id=1498269
139 * https://lists.suckless.org/dev/1701/30932.html
140 * https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916349
141 * and lots more all over the internet.
144 if(FcPatternGetBool(xfont->pattern, FC_COLOR, 0, &iscol) == FcResultMatch && iscol) {
145 XftFontClose(drw->dpy, xfont);
149 font = ecalloc(1, sizeof(Fnt));
151 font->pattern = pattern;
152 font->h = xfont->ascent + xfont->descent;
153 font->dpy = drw->dpy;
159 xfont_free(Fnt *font)
164 FcPatternDestroy(font->pattern);
165 XftFontClose(font->dpy, font->xfont);
170 drw_fontset_create(Drw* drw, const char *fonts[], size_t fontcount)
172 Fnt *cur, *ret = NULL;
178 for (i = 1; i <= fontcount; i++) {
179 if ((cur = xfont_create(drw, fonts[fontcount - i], NULL))) {
184 return (drw->fonts = ret);
188 drw_fontset_free(Fnt *font)
191 drw_fontset_free(font->next);
197 drw_clr_create(Drw *drw, Clr *dest, const char *clrname)
199 if (!drw || !dest || !clrname)
202 if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
203 DefaultColormap(drw->dpy, drw->screen),
205 die("error, cannot allocate color '%s'", clrname);
208 /* Wrapper to create color schemes. The caller has to call free(3) on the
209 * returned color scheme when done using it. */
211 drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount)
216 /* need at least two colors for a scheme */
217 if (!drw || !clrnames || clrcount < 2 || !(ret = ecalloc(clrcount, sizeof(XftColor))))
220 for (i = 0; i < clrcount; i++)
221 drw_clr_create(drw, &ret[i], clrnames[i]);
226 drw_setfontset(Drw *drw, Fnt *set)
233 drw_setscheme(Drw *drw, Clr *scm)
240 drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int invert)
242 if (!drw || !drw->scheme)
244 XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme[ColBg].pixel : drw->scheme[ColFg].pixel);
246 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
248 XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w - 1, h - 1);
252 drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert)
258 Fnt *usedfont, *curfont, *nextfont;
260 int utf8strlen, utf8charlen, render = x || y || w || h;
261 long utf8codepoint = 0;
263 FcCharSet *fccharset;
264 FcPattern *fcpattern;
269 if (!drw || (render && !drw->scheme) || !text || !drw->fonts)
275 XSetForeground(drw->dpy, drw->gc, drw->scheme[invert ? ColFg : ColBg].pixel);
276 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
277 d = XftDrawCreate(drw->dpy, drw->drawable,
278 DefaultVisual(drw->dpy, drw->screen),
279 DefaultColormap(drw->dpy, drw->screen));
284 usedfont = drw->fonts;
290 utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
291 for (curfont = drw->fonts; curfont; curfont = curfont->next) {
292 charexists = charexists || XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);
294 if (curfont == usedfont) {
295 utf8strlen += utf8charlen;
304 if (!charexists || nextfont)
311 drw_font_getexts(usedfont, utf8str, utf8strlen, &ew, NULL);
312 /* shorten text if necessary */
313 for (len = MIN(utf8strlen, sizeof(buf) - 1); len && ew > w; len--)
314 drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
317 memcpy(buf, utf8str, len);
319 if (len < utf8strlen)
320 for (i = len; i && i > len - 3; buf[--i] = '.')
324 ty = y + (h - usedfont->h) / 2 + usedfont->xfont->ascent;
325 XftDrawStringUtf8(d, &drw->scheme[invert ? ColBg : ColFg],
326 usedfont->xfont, x, ty, (XftChar8 *)buf, len);
335 } else if (nextfont) {
339 /* Regardless of whether or not a fallback font is found, the
340 * character must be drawn. */
343 fccharset = FcCharSetCreate();
344 FcCharSetAddChar(fccharset, utf8codepoint);
346 if (!drw->fonts->pattern) {
347 /* Refer to the comment in xfont_create for more information. */
348 die("the first font in the cache must be loaded from a font string.");
351 fcpattern = FcPatternDuplicate(drw->fonts->pattern);
352 FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
353 FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
354 FcPatternAddBool(fcpattern, FC_COLOR, FcFalse);
356 FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
357 FcDefaultSubstitute(fcpattern);
358 match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);
360 FcCharSetDestroy(fccharset);
361 FcPatternDestroy(fcpattern);
364 usedfont = xfont_create(drw, NULL, match);
365 if (usedfont && XftCharExists(drw->dpy, usedfont->xfont, utf8codepoint)) {
366 for (curfont = drw->fonts; curfont->next; curfont = curfont->next)
368 curfont->next = usedfont;
370 xfont_free(usedfont);
371 usedfont = drw->fonts;
379 return x + (render ? w : 0);
383 drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)
388 XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
389 XSync(drw->dpy, False);
393 drw_fontset_getwidth(Drw *drw, const char *text)
395 if (!drw || !drw->fonts || !text)
397 return drw_text(drw, 0, 0, 0, 0, 0, text, 0);
401 drw_font_getexts(Fnt *font, const char *text, unsigned int len, unsigned int *w, unsigned int *h)
408 XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
416 drw_cur_create(Drw *drw, int shape)
420 if (!drw || !(cur = ecalloc(1, sizeof(Cur))))
423 cur->cursor = XCreateFontCursor(drw->dpy, shape);
429 drw_cur_free(Drw *drw, Cur *cursor)
434 XFreeCursor(drw->dpy, cursor->cursor);