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)
68 drw = ecalloc(1, sizeof(Drw));
74 drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen));
75 drw->gc = XCreateGC(dpy, root, 0, NULL);
77 XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);
83 drw_resize(Drw *drw, unsigned int w, unsigned int h)
88 XFreePixmap(drw->dpy, drw->drawable);
89 drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));
97 for (i = 0; i < drw->fontcount; i++)
98 drw_font_free(drw->fonts[i]);
99 XFreePixmap(drw->dpy, drw->drawable);
100 XFreeGC(drw->dpy, drw->gc);
104 /* This function is an implementation detail. Library users should use
105 * drw_font_create instead.
108 drw_font_xcreate(Drw *drw, const char *fontname, FcPattern *fontpattern)
112 if (!(fontname || fontpattern))
113 die("No font specified.\n");
115 if (!(font = calloc(1, sizeof(Fnt))))
119 /* Using the pattern found at font->xfont->pattern does not yield same
120 * the same substitution results as using the pattern returned by
121 * FcNameParse; using the latter results in the desired fallback
122 * behaviour whereas the former just results in
123 * missing-character-rectangles being drawn, at least with some fonts.
125 if (!(font->xfont = XftFontOpenName(drw->dpy, drw->screen, fontname)) ||
126 !(font->pattern = FcNameParse((FcChar8 *) fontname))) {
128 XftFontClose(drw->dpy, font->xfont);
131 fprintf(stderr, "error, cannot load font: '%s'\n", fontname);
133 } else if (fontpattern) {
134 if (!(font->xfont = XftFontOpenPattern(drw->dpy, fontpattern)))
135 fprintf(stderr, "error, cannot load font pattern.\n");
137 font->pattern = NULL;
145 font->ascent = font->xfont->ascent;
146 font->descent = font->xfont->descent;
147 font->h = font->ascent + font->descent;
148 font->dpy = drw->dpy;
154 drw_font_create(Drw *drw, const char *fontname)
156 return drw_font_xcreate(drw, fontname, NULL);
160 drw_load_fonts(Drw* drw, const char *fonts[], size_t fontcount)
165 for (i = 0; i < fontcount; i++) {
166 if (drw->fontcount >= DRW_FONT_CACHE_SIZE) {
167 die("Font cache exhausted.\n");
168 } else if ((font = drw_font_xcreate(drw, fonts[i], NULL))) {
169 drw->fonts[drw->fontcount++] = font;
175 drw_font_free(Fnt *font)
180 FcPatternDestroy(font->pattern);
181 XftFontClose(font->dpy, font->xfont);
186 drw_clr_create(Drw *drw, const char *clrname)
190 clr = ecalloc(1, sizeof(Clr));
191 if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
192 DefaultColormap(drw->dpy, drw->screen),
194 die("error, cannot allocate color '%s'\n", clrname);
195 clr->pix = clr->rgb.pixel;
201 drw_clr_free(Clr *clr)
207 drw_setscheme(Drw *drw, ClrScheme *scheme)
209 drw->scheme = scheme;
213 drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int empty, int invert)
217 XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->bg->pix : drw->scheme->fg->pix);
219 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w + 1, h + 1);
221 XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
225 drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, int invert)
233 Fnt *curfont, *nextfont;
235 int utf8strlen, utf8charlen, render;
236 long utf8codepoint = 0;
238 FcCharSet *fccharset;
239 FcPattern *fcpattern;
244 if (!(render = x || y || w || h))
247 if (!drw || !drw->scheme) {
250 XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->fg->pix : drw->scheme->bg->pix);
251 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
254 if (!text || !drw->fontcount) {
257 cmap = DefaultColormap(drw->dpy, drw->screen);
258 vis = DefaultVisual(drw->dpy, drw->screen);
259 d = XftDrawCreate(drw->dpy, drw->drawable, vis, cmap);
262 curfont = drw->fonts[0];
268 utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
269 for (i = 0; i < drw->fontcount; i++) {
270 charexists = charexists || XftCharExists(drw->dpy, drw->fonts[i]->xfont, utf8codepoint);
272 if (drw->fonts[i] == curfont) {
273 utf8strlen += utf8charlen;
276 nextfont = drw->fonts[i];
282 if (!charexists || (nextfont && nextfont != curfont))
289 drw_font_getexts(curfont, utf8str, utf8strlen, &tex);
290 /* shorten text if necessary */
291 for (len = MIN(utf8strlen, (sizeof buf) - 1); len && (tex.w > w - drw->fonts[0]->h || w < drw->fonts[0]->h); len--)
292 drw_font_getexts(curfont, utf8str, len, &tex);
295 memcpy(buf, utf8str, len);
297 if (len < utf8strlen)
298 for (i = len; i && i > len - 3; buf[--i] = '.');
301 th = curfont->ascent + curfont->descent;
302 ty = y + (h / 2) - (th / 2) + curfont->ascent;
304 XftDrawStringUtf8(d, invert ? &drw->scheme->bg->rgb : &drw->scheme->fg->rgb, curfont->xfont, tx, ty, (XftChar8 *)buf, len);
313 } else if (nextfont) {
317 /* Regardless of whether or not a fallback font is found, the
318 * character must be drawn.
322 if (drw->fontcount >= DRW_FONT_CACHE_SIZE)
325 fccharset = FcCharSetCreate();
326 FcCharSetAddChar(fccharset, utf8codepoint);
328 if (!drw->fonts[0]->pattern) {
329 /* Refer to the comment in drw_font_xcreate for more
331 die("The first font in the cache must be loaded from a font string.\n");
334 fcpattern = FcPatternDuplicate(drw->fonts[0]->pattern);
335 FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
336 FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
338 FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
339 FcDefaultSubstitute(fcpattern);
340 match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);
342 FcCharSetDestroy(fccharset);
343 FcPatternDestroy(fcpattern);
346 curfont = drw_font_xcreate(drw, NULL, match);
347 if (curfont && XftCharExists(drw->dpy, curfont->xfont, utf8codepoint)) {
348 drw->fonts[drw->fontcount++] = curfont;
351 drw_font_free(curfont);
352 curfont = drw->fonts[0];
364 drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)
366 XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
367 XSync(drw->dpy, False);
371 drw_font_getexts(Fnt *font, const char *text, unsigned int len, Extnts *tex)
375 XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
381 drw_font_getexts_width(Fnt *font, const char *text, unsigned int len)
385 drw_font_getexts(font, text, len, &tex);
391 drw_cur_create(Drw *drw, int shape)
395 cur = ecalloc(1, sizeof(Cur));
396 cur->cursor = XCreateFontCursor(drw->dpy, shape);
402 drw_cur_free(Drw *drw, Cur *cursor)
406 XFreeCursor(drw->dpy, cursor->cursor);