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);
101 /* This function is an implementation detail. Library users should use
102 * drw_fontset_create instead.
105 xfont_create(Drw *drw, const char *fontname, FcPattern *fontpattern)
108 XftFont *xfont = NULL;
109 FcPattern *pattern = NULL;
112 /* Using the pattern found at font->xfont->pattern does not yield the
113 * same substitution results as using the pattern returned by
114 * FcNameParse; using the latter results in the desired fallback
115 * behaviour whereas the former just results in missing-character
116 * rectangles being drawn, at least with some fonts. */
117 if (!(xfont = XftFontOpenName(drw->dpy, drw->screen, fontname))) {
118 fprintf(stderr, "error, cannot load font from name: '%s'\n", fontname);
121 if (!(pattern = FcNameParse((FcChar8 *) fontname))) {
122 fprintf(stderr, "error, cannot parse font name to pattern: '%s'\n", fontname);
123 XftFontClose(drw->dpy, xfont);
126 } else if (fontpattern) {
127 if (!(xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {
128 fprintf(stderr, "error, cannot load font from pattern.\n");
132 die("no font specified.");
135 font = ecalloc(1, sizeof(Fnt));
137 font->pattern = pattern;
138 font->h = xfont->ascent + xfont->descent;
139 font->dpy = drw->dpy;
145 xfont_free(Fnt *font)
150 FcPatternDestroy(font->pattern);
151 XftFontClose(font->dpy, font->xfont);
156 drw_fontset_create(Drw* drw, const char *fonts[], size_t fontcount)
158 Fnt *cur, *ret = NULL;
164 for (i = 1; i <= fontcount; i++) {
165 if ((cur = xfont_create(drw, fonts[fontcount - i], NULL))) {
170 return (drw->fonts = ret);
174 drw_fontset_free(Fnt *font)
177 drw_fontset_free(font->next);
183 drw_clr_create(Drw *drw, XftColor *dest, const char *clrname)
185 if (!drw || !dest || !clrname)
188 if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
189 DefaultColormap(drw->dpy, drw->screen),
191 die("error, cannot allocate color '%s'", clrname);
194 /* Wrapper to create color schemes. The caller has to call free(3) on the
195 * returned color scheme when done using it. */
197 drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount)
202 /* need at least two colors for a scheme */
203 if (!drw || !clrnames || clrcount < 2 || !(ret = ecalloc(clrcount, sizeof(XftColor))))
206 for (i = 0; i < clrcount; i++)
207 drw_clr_create(drw, &ret[i], clrnames[i]);
212 drw_setfontset(Drw *drw, Fnt *set)
219 drw_setscheme(Drw *drw, Scm scm)
226 drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int invert)
228 if (!drw || !drw->scheme)
230 XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme[ColBg].pixel : drw->scheme[ColFg].pixel);
232 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
234 XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w - 1, h - 1);
238 drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert)
244 Fnt *usedfont, *curfont, *nextfont;
246 int utf8strlen, utf8charlen, render = x || y || w || h;
247 long utf8codepoint = 0;
249 FcCharSet *fccharset;
250 FcPattern *fcpattern;
255 if (!drw || (render && !drw->scheme) || !text || !drw->fonts)
261 XSetForeground(drw->dpy, drw->gc, drw->scheme[invert ? ColFg : ColBg].pixel);
262 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
263 d = XftDrawCreate(drw->dpy, drw->drawable,
264 DefaultVisual(drw->dpy, drw->screen),
265 DefaultColormap(drw->dpy, drw->screen));
270 usedfont = drw->fonts;
276 utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
277 for (curfont = drw->fonts; curfont; curfont = curfont->next) {
278 charexists = charexists || XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);
280 if (curfont == usedfont) {
281 utf8strlen += utf8charlen;
290 if (!charexists || nextfont)
297 drw_font_getexts(usedfont, utf8str, utf8strlen, &ew, NULL);
298 /* shorten text if necessary */
299 for (len = MIN(utf8strlen, sizeof(buf) - 1); len && ew > w; len--)
300 drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
303 memcpy(buf, utf8str, len);
305 if (len < utf8strlen)
306 for (i = len; i && i > len - 3; buf[--i] = '.')
310 ty = y + (h - usedfont->h) / 2 + usedfont->xfont->ascent;
311 XftDrawStringUtf8(d, &drw->scheme[invert ? ColBg : ColFg],
312 usedfont->xfont, x, ty, (XftChar8 *)buf, len);
321 } else if (nextfont) {
325 /* Regardless of whether or not a fallback font is found, the
326 * character must be drawn. */
329 fccharset = FcCharSetCreate();
330 FcCharSetAddChar(fccharset, utf8codepoint);
332 if (!drw->fonts->pattern) {
333 /* Refer to the comment in xfont_create for more information. */
334 die("the first font in the cache must be loaded from a font string.");
337 fcpattern = FcPatternDuplicate(drw->fonts->pattern);
338 FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
339 FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
341 FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
342 FcDefaultSubstitute(fcpattern);
343 match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);
345 FcCharSetDestroy(fccharset);
346 FcPatternDestroy(fcpattern);
349 usedfont = xfont_create(drw, NULL, match);
350 if (usedfont && XftCharExists(drw->dpy, usedfont->xfont, utf8codepoint)) {
351 for (curfont = drw->fonts; curfont->next; curfont = curfont->next)
353 curfont->next = usedfont;
355 xfont_free(usedfont);
356 usedfont = drw->fonts;
364 return x + (render ? w : 0);
368 drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)
373 XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
374 XSync(drw->dpy, False);
378 drw_fontset_getwidth(Drw *drw, const char *text)
380 if (!drw || !drw->fonts || !text)
382 return drw_text(drw, 0, 0, 0, 0, 0, text, 0);
386 drw_font_getexts(Fnt *font, const char *text, unsigned int len, unsigned int *w, unsigned int *h)
393 XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
401 drw_cur_create(Drw *drw, int shape)
405 if (!drw || !(cur = ecalloc(1, sizeof(Cur))))
408 cur->cursor = XCreateFontCursor(drw->dpy, shape);
414 drw_cur_free(Drw *drw, Cur *cursor)
419 XFreeCursor(drw->dpy, cursor->cursor);