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 if (!(drw = calloc(1, sizeof(Drw))))
75 drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen));
76 drw->gc = XCreateGC(dpy, root, 0, NULL);
78 XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);
84 drw_resize(Drw *drw, unsigned int w, unsigned int h)
91 XFreePixmap(drw->dpy, drw->drawable);
92 drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));
100 for (i = 0; i < drw->fontcount; i++)
101 drw_font_free(drw->fonts[i]);
102 XFreePixmap(drw->dpy, drw->drawable);
103 XFreeGC(drw->dpy, drw->gc);
107 /* This function is an implementation detail. Library users should use
108 * drw_font_create instead.
111 drw_font_xcreate(Drw *drw, const char *fontname, FcPattern *fontpattern)
115 if (!(fontname || fontpattern))
116 die("No font specified.\n");
118 if (!(font = calloc(1, sizeof(Fnt))))
122 /* Using the pattern found at font->xfont->pattern does not yield same
123 * the same substitution results as using the pattern returned by
124 * FcNameParse; using the latter results in the desired fallback
125 * behaviour whereas the former just results in
126 * missing-character-rectangles being drawn, at least with some fonts.
128 if (!(font->xfont = XftFontOpenName(drw->dpy, drw->screen, fontname)) ||
129 !(font->pattern = FcNameParse((FcChar8 *) fontname))) {
131 XftFontClose(drw->dpy, font->xfont);
134 fprintf(stderr, "error, cannot load font: '%s'\n", fontname);
136 } else if (fontpattern) {
137 if (!(font->xfont = XftFontOpenPattern(drw->dpy, fontpattern)))
138 fprintf(stderr, "error, cannot load font pattern.\n");
140 font->pattern = NULL;
148 font->ascent = font->xfont->ascent;
149 font->descent = font->xfont->descent;
150 font->h = font->ascent + font->descent;
151 font->dpy = drw->dpy;
157 drw_font_create(Drw *drw, const char *fontname)
159 return drw_font_xcreate(drw, fontname, NULL);
163 drw_load_fonts(Drw* drw, const char *fonts[], size_t fontcount)
168 for (i = 0; i < fontcount; i++) {
169 if (drw->fontcount >= DRW_FONT_CACHE_SIZE) {
170 die("Font cache exhausted.\n");
171 } else if ((font = drw_font_xcreate(drw, fonts[i], NULL))) {
172 drw->fonts[drw->fontcount++] = font;
178 drw_font_free(Fnt *font)
183 FcPatternDestroy(font->pattern);
184 XftFontClose(font->dpy, font->xfont);
189 drw_clr_create(Drw *drw, const char *clrname)
197 if (!(clr = calloc(1, sizeof(Clr))))
199 cmap = DefaultColormap(drw->dpy, drw->screen);
200 vis = DefaultVisual(drw->dpy, drw->screen);
201 if (!XftColorAllocName(drw->dpy, vis, cmap, clrname, &clr->rgb))
202 die("error, cannot allocate color '%s'\n", clrname);
203 clr->pix = clr->rgb.pixel;
209 drw_clr_free(Clr *clr)
215 drw_setscheme(Drw *drw, ClrScheme *scheme)
219 drw->scheme = scheme;
223 drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int empty, int invert)
225 if (!drw || !drw->scheme)
227 XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->bg->pix : drw->scheme->fg->pix);
229 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w + 1, h + 1);
231 XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
235 drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, int invert)
243 Fnt *curfont, *nextfont;
245 int utf8strlen, utf8charlen, render;
246 long utf8codepoint = 0;
248 FcCharSet *fccharset;
249 FcPattern *fcpattern;
254 if (!(render = x || y || w || h))
257 if (!drw || !drw->scheme) {
260 XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->fg->pix : drw->scheme->bg->pix);
261 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
264 if (!text || !drw->fontcount) {
267 cmap = DefaultColormap(drw->dpy, drw->screen);
268 vis = DefaultVisual(drw->dpy, drw->screen);
269 d = XftDrawCreate(drw->dpy, drw->drawable, vis, cmap);
272 curfont = drw->fonts[0];
278 utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
279 for (i = 0; i < drw->fontcount; i++) {
280 charexists = charexists || XftCharExists(drw->dpy, drw->fonts[i]->xfont, utf8codepoint);
282 if (drw->fonts[i] == curfont) {
283 utf8strlen += utf8charlen;
286 nextfont = drw->fonts[i];
292 if (!charexists || (nextfont && nextfont != curfont))
299 drw_font_getexts(curfont, utf8str, utf8strlen, &tex);
300 /* shorten text if necessary */
301 for (len = MIN(utf8strlen, (sizeof buf) - 1); len && (tex.w > w - drw->fonts[0]->h || w < drw->fonts[0]->h); len--)
302 drw_font_getexts(curfont, utf8str, len, &tex);
305 memcpy(buf, utf8str, len);
307 if (len < utf8strlen)
308 for (i = len; i && i > len - 3; buf[--i] = '.');
311 th = curfont->ascent + curfont->descent;
312 ty = y + (h / 2) - (th / 2) + curfont->ascent;
314 XftDrawStringUtf8(d, invert ? &drw->scheme->bg->rgb : &drw->scheme->fg->rgb, curfont->xfont, tx, ty, (XftChar8 *)buf, len);
323 } else if (nextfont) {
327 /* Regardless of whether or not a fallback font is found, the
328 * character must be drawn.
332 if (drw->fontcount >= DRW_FONT_CACHE_SIZE)
335 fccharset = FcCharSetCreate();
336 FcCharSetAddChar(fccharset, utf8codepoint);
338 if (!drw->fonts[0]->pattern) {
339 /* Refer to the comment in drw_font_xcreate for more
341 die("The first font in the cache must be loaded from a font string.\n");
344 fcpattern = FcPatternDuplicate(drw->fonts[0]->pattern);
345 FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
346 FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
348 FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
349 FcDefaultSubstitute(fcpattern);
350 match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);
352 FcCharSetDestroy(fccharset);
353 FcPatternDestroy(fcpattern);
356 curfont = drw_font_xcreate(drw, NULL, match);
357 if (curfont && XftCharExists(drw->dpy, curfont->xfont, utf8codepoint)) {
358 drw->fonts[drw->fontcount++] = curfont;
361 drw_font_free(curfont);
362 curfont = drw->fonts[0];
374 drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)
378 XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
379 XSync(drw->dpy, False);
383 drw_font_getexts(Fnt *font, const char *text, unsigned int len, Extnts *tex)
389 XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
395 drw_font_getexts_width(Fnt *font, const char *text, unsigned int len)
401 drw_font_getexts(font, text, len, &tex);
406 drw_cur_create(Drw *drw, int shape)
412 if (!(cur = calloc(1, sizeof(Cur))))
414 cur->cursor = XCreateFontCursor(drw->dpy, shape);
420 drw_cur_free(Drw *drw, Cur *cursor)
424 XFreeCursor(drw->dpy, cursor->cursor);