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) {
21 for(*i = 0; *i < (UTF_SIZ + 1); ++(*i))
22 if(((unsigned char)c & utfmask[*i]) == utfbyte[*i])
23 return (unsigned char)c & ~utfmask[*i];
28 utf8validate(long *u, size_t i) {
29 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
31 for(i = 1; *u > utfmax[i]; ++i)
37 utf8decode(const char *c, long *u, size_t clen) {
38 size_t i, j, len, type;
44 udecoded = utf8decodebyte(c[0], &len);
45 if(!BETWEEN(len, 1, UTF_SIZ))
47 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
48 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
60 drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h) {
61 Drw *drw = (Drw *)calloc(1, sizeof(Drw));
69 drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen));
70 drw->gc = XCreateGC(dpy, root, 0, NULL);
72 XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);
77 drw_resize(Drw *drw, unsigned int w, unsigned int h) {
82 if(drw->drawable != 0)
83 XFreePixmap(drw->dpy, drw->drawable);
84 drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));
91 for (i = 0; i < drw->fontcount; i++) {
92 drw_font_free(drw->fonts[i]);
94 XFreePixmap(drw->dpy, drw->drawable);
95 XFreeGC(drw->dpy, drw->gc);
99 /* This function is an implementation detail. Library users should use
100 * drw_font_create instead.
103 drw_font_xcreate(Drw *drw, const char *fontname, FcPattern *fontpattern) {
106 if (!(fontname || fontpattern))
107 die("No font specified.\n");
109 if (!(font = (Fnt *)calloc(1, sizeof(Fnt))))
113 /* Using the pattern found at font->xfont->pattern does not yield same
114 * the 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
117 * missing-character-rectangles being drawn, at least with some fonts.
119 if (!(font->xfont = XftFontOpenName(drw->dpy, drw->screen, fontname)) ||
120 !(font->pattern = FcNameParse((FcChar8 *) fontname))) {
122 XftFontClose(drw->dpy, font->xfont);
125 fprintf(stderr, "error, cannot load font: '%s'\n", fontname);
127 } else if (fontpattern) {
128 if (!(font->xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {
129 fprintf(stderr, "error, cannot load font pattern.\n");
131 font->pattern = NULL;
140 font->ascent = font->xfont->ascent;
141 font->descent = font->xfont->descent;
142 font->h = font->ascent + font->descent;
143 font->dpy = drw->dpy;
148 drw_font_create(Drw *drw, const char *fontname) {
149 return drw_font_xcreate(drw, fontname, NULL);
153 drw_load_fonts(Drw* drw, const char *fonts[], size_t fontcount) {
157 for (i = 0; i < fontcount; i++) {
158 if (drw->fontcount >= DRW_FONT_CACHE_SIZE) {
159 die("Font cache exhausted.\n");
160 } else if ((font = drw_font_xcreate(drw, fonts[i], NULL))) {
161 drw->fonts[drw->fontcount++] = font;
167 drw_font_free(Fnt *font) {
171 FcPatternDestroy(font->pattern);
172 XftFontClose(font->dpy, font->xfont);
177 drw_clr_create(Drw *drw, const char *clrname) {
184 clr = (Clr *)calloc(1, sizeof(Clr));
187 cmap = DefaultColormap(drw->dpy, drw->screen);
188 vis = DefaultVisual(drw->dpy, drw->screen);
189 if(!XftColorAllocName(drw->dpy, vis, cmap, clrname, &clr->rgb))
190 die("error, cannot allocate color '%s'\n", clrname);
191 clr->pix = clr->rgb.pixel;
196 drw_clr_free(Clr *clr) {
201 drw_setscheme(Drw *drw, ClrScheme *scheme) {
204 drw->scheme = scheme;
208 drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int empty, int invert) {
209 if(!drw || !drw->scheme)
211 XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->bg->pix : drw->scheme->fg->pix);
213 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w + 1, h + 1);
215 XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
219 drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, int invert) {
226 Fnt *curfont, *nextfont;
228 int utf8strlen, utf8charlen, render;
229 long utf8codepoint = 0;
231 FcCharSet *fccharset;
232 FcPattern *fcpattern;
237 if (!(render = x || y || w || h)) {
241 if (!drw || !drw->scheme) {
244 XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->fg->pix : drw->scheme->bg->pix);
245 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
248 if (!text || !drw->fontcount) {
251 cmap = DefaultColormap(drw->dpy, drw->screen);
252 vis = DefaultVisual(drw->dpy, drw->screen);
253 d = XftDrawCreate(drw->dpy, drw->drawable, vis, cmap);
256 curfont = drw->fonts[0];
262 utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
263 for (i = 0; i < drw->fontcount; i++) {
264 charexists = charexists || XftCharExists(drw->dpy, drw->fonts[i]->xfont, utf8codepoint);
266 if (drw->fonts[i] == curfont) {
267 utf8strlen += utf8charlen;
270 nextfont = drw->fonts[i];
276 if (!charexists || (nextfont && nextfont != curfont)) {
284 drw_font_getexts(curfont, utf8str, utf8strlen, &tex);
285 /* shorten text if necessary */
286 for(len = MIN(utf8strlen, (sizeof buf) - 1); len && (tex.w > w - drw->fonts[0]->h || w < drw->fonts[0]->h); len--)
287 drw_font_getexts(curfont, utf8str, len, &tex);
290 memcpy(buf, utf8str, len);
293 for(i = len; i && i > len - 3; buf[--i] = '.');
296 th = curfont->ascent + curfont->descent;
297 ty = y + (h / 2) - (th / 2) + curfont->ascent;
299 XftDrawStringUtf8(d, invert ? &drw->scheme->bg->rgb : &drw->scheme->fg->rgb, curfont->xfont, tx, ty, (XftChar8 *)buf, len);
309 } else if (nextfont) {
313 /* Regardless of whether or not a fallback font is found, the
314 * character must be drawn.
318 if (drw->fontcount >= DRW_FONT_CACHE_SIZE) {
322 fccharset = FcCharSetCreate();
323 FcCharSetAddChar(fccharset, utf8codepoint);
325 if (!drw->fonts[0]->pattern) {
326 /* Refer to the comment in drw_font_xcreate for more
329 die("The first font in the cache must be loaded from a font string.\n");
332 fcpattern = FcPatternDuplicate(drw->fonts[0]->pattern);
333 FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
334 FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
336 FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
337 FcDefaultSubstitute(fcpattern);
338 match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);
340 FcCharSetDestroy(fccharset);
341 FcPatternDestroy(fcpattern);
344 curfont = drw_font_xcreate(drw, NULL, match);
345 if (curfont && XftCharExists(drw->dpy, curfont->xfont, utf8codepoint)) {
346 drw->fonts[drw->fontcount++] = curfont;
349 drw_font_free(curfont);
351 curfont = drw->fonts[0];
365 drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h) {
368 XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
369 XSync(drw->dpy, False);
374 drw_font_getexts(Fnt *font, const char *text, unsigned int len, Extnts *tex) {
379 XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
385 drw_font_getexts_width(Fnt *font, const char *text, unsigned int len) {
390 drw_font_getexts(font, text, len, &tex);
395 drw_cur_create(Drw *drw, int shape) {
400 cur = (Cur *)calloc(1, sizeof(Cur));
403 cur->cursor = XCreateFontCursor(drw->dpy, shape);
408 drw_cur_free(Drw *drw, Cur *cursor) {
411 XFreeCursor(drw->dpy, cursor->cursor);