1 /*----------------------------------------------------------------------*
2 * File: rxvtfont.C
3 *----------------------------------------------------------------------*
4 * Copyright (c) 2003-2008 Marc Lehmann <schmorp@schmorp.de>
5 * - original version.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 *---------------------------------------------------------------------*/
21
22 #include "../config.h"
23 #include "rxvt.h"
24 #include "rxvtutil.h"
25 #include "rxvtfont.h"
26
27 #include <stdlib.h>
28
29 #include <inttypes.h>
30
31 #if XFT
32 # include <fontconfig/fontconfig.h>
33 #endif
34
35 #define MAX_OVERLAP_ROMAN (8 + 2) // max. character width in 8ths of the base width
36 #define MAX_OVERLAP_ITALIC (8 + 3) // max. overlap for italic fonts
37
38 #define OVERLAP_OK(w,wcw,prop) ((w) <= ( \
39 (prop)->slant >= rxvt_fontprop::italic \
40 ? ((prop)->width * (wcw) * MAX_OVERLAP_ITALIC + 7) >> 3 \
41 : ((prop)->width * (wcw) * MAX_OVERLAP_ROMAN + 7) >> 3 \
42 ))
43
44 static const struct rxvt_fallback_font {
45 codeset cs;
46 const char *name;
47 } fallback_fonts[] = {
48 { CS_ISO8859_1, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-1" },
49 { CS_ISO8859_15, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-15" },
50 { CS_ISO8859_15, "-*-*-*-r-*--*-*-*-*-c-*-fcd8859-15" },
51
52 #if ENCODING_EU
53 // cyrillic
54 { CS_KOI8_R, "-*-*-*-r-*--*-*-*-*-c-*-koi8-r" },
55 { CS_KOI8_U, "-*-*-*-r-*--*-*-*-*-c-*-koi8-u" },
56
57 { CS_ISO8859_2, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-2" },
58 { CS_ISO8859_3, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-3" },
59 { CS_ISO8859_4, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-4" },
60 { CS_ISO8859_5, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-5" },
61 { CS_ISO8859_6, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-6" },
62 { CS_ISO8859_7, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-7" },
63 { CS_ISO8859_8, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-8" },
64 { CS_ISO8859_9, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-9" },
65 { CS_ISO8859_10, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-10" },
66 { CS_ISO8859_11, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-11" },
67 { CS_ISO8859_13, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-13" },
68 { CS_ISO8859_14, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-14" },
69 { CS_ISO8859_16, "-*-*-*-r-*--*-*-*-*-c-*-iso8859-16" },
70
71 # if XFT
72 { CS_KOI8_U, "xft::lang=ru" },
73
74 { CS_ISO8859_5, "xft::lang=ru" },
75 { CS_ISO8859_6, "xft::lang=ar" },
76 { CS_ISO8859_7, "xft::lang=el" },
77 { CS_ISO8859_8, "xft::lang=he" },
78 { CS_ISO8859_9, "xft::lang=tr" },
79 { CS_ISO8859_10, "xft::lang=se" },
80 { CS_ISO8859_11, "xft::lang=th" },
81 # endif
82 #endif
83
84 // japanese
85 #if ENCODING_JP || ENCODING_JP_EXT
86 # if XFT
87 // prefer xft for complex scripts
88 { CS_JIS0208_1990_0, "xft:Sazanami Mincho:antialias=false" },
89 { CS_JIS0208_1990_0, "xft:Kochi Gothic:antialias=false" },
90 { CS_JIS0208_1990_0, "xft:Mincho:antialias=false" },
91 { CS_JIS0208_1990_0, "xft::lang=ja:antialias=false" },
92 # endif
93 { CS_JIS0201_1976_0, "-*-mincho-*-r-*--*-*-*-*-c-*-jisx0201*-0" },
94 { CS_JIS0208_1990_0, "-*-mincho-*-r-*--*-*-*-*-c-*-jisx0208*-0" },
95 { CS_JIS0212_1990_0, "-*-mincho-*-r-*--*-*-*-*-c-*-jisx0212*-0" },
96 { CS_JIS0201_1976_0, "-*-*-*-r-*--*-*-*-*-c-*-jisx0201*-0" },
97 { CS_JIS0208_1990_0, "-*-*-*-r-*--*-*-*-*-c-*-jisx0208*-0" },
98 { CS_JIS0212_1990_0, "-*-*-*-r-*--*-*-*-*-c-*-jisx0212*-0" },
99 #endif
100
101 #if ENCODING_ZH || ENCODING_ZH_EXT
102 # if XFT
103 { CS_GBK_0, "xft:AR PL KaitiM GB" },
104 { CS_GBK_0, "xft:AR PL SungtiL GB" },
105 { CS_GBK_0, "xft::lang=zh" },
106 { CS_BIG5_EXT, "xft:AR PL Mingti2L Big5" },
107 { CS_BIG5_EXT, "xft:AR PL KaitiM Big5" },
108 { CS_GB2312_1980_0, "xft:AR PL KaitiM GB" },
109 { CS_GB2312_1980_0, "xft:AR PL SungtiL GB" },
110 { CS_GB2312_1980_0, "xft::lang=zh" },
111 # endif
112 { CS_GBK_0, "-*-*-*-*-*-*-*-*-*-*-c-*-gbk*-0" },
113 { CS_BIG5, "-*-*-*-*-*-*-*-*-*-*-c-*-big5-0" },
114 { CS_BIG5_PLUS, "-*-*-*-*-*-*-*-*-*-*-c-*-big5p-0" },
115 { CS_BIG5_EXT, "-*-*-*-*-*-*-*-*-*-*-c-*-big5.eten-0" },
116 { CS_GB2312_1980_0, "-*-*-*-*-*-*-*-*-*-*-c-*-gb2312*-0" },
117 { CS_CNS11643_1992_1, "-*-*-*-*-*-*-*-*-*-*-c-*-gb2312*-0" },
118 { CS_CNS11643_1992_1, "-*-*-*-*-*-*-*-*-*-*-c-*-cns11643*-1" },
119 { CS_CNS11643_1992_2, "-*-*-*-*-*-*-*-*-*-*-c-*-cns11643*-2" },
120 { CS_CNS11643_1992_3, "-*-*-*-*-*-*-*-*-*-*-c-*-cns11643*-3" },
121 { CS_CNS11643_1992_4, "-*-*-*-*-*-*-*-*-*-*-c-*-cns11643*-4" },
122 { CS_CNS11643_1992_5, "-*-*-*-*-*-*-*-*-*-*-c-*-cns11643*-5" },
123 { CS_CNS11643_1992_6, "-*-*-*-*-*-*-*-*-*-*-c-*-cns11643*-6" },
124 { CS_CNS11643_1992_7, "-*-*-*-*-*-*-*-*-*-*-c-*-cns11643*-7" },
125 { CS_CNS11643_1992_F, "-*-*-*-*-*-*-*-*-*-*-c-*-cns11643*-f" },
126 #endif
127
128 #if ENCODING_KR
129 { CS_KSC5601_1987_0, "-baekmuk-gulim-*-*-*-*-*-*-*-*-c-*-ksc5601*" },
130 { CS_KSC5601_1987_0, "-*-*-*-*-*-*-*-*-*-*-c-*-ksc5601*" },
131 # if XFT
132 { CS_KSC5601_1987_0, "xft:Baekmuk Gulim:antialias=false" },
133 { CS_KSC5601_1987_0, "xft::lang=ko:antialias=false" },
134 # endif
135 #endif
136
137 //{ CS_UNICODE, "-*-unifont-*-*-*-*-*-*-*-*-c-*-iso10646-1" }, // this gem of a font has actual dotted circles within the combining character glyphs.
138 #if XFT
139 { CS_UNICODE, "xft:DejaVu Sans Mono:antialias=false:autohint=true" },
140 { CS_UNICODE, "xft:Courier New:antialias=false:autohint=true" },
141 { CS_UNICODE, "xft:Andale Mono:antialias=false:autohint=false" },
142 { CS_UNICODE, "xft:Arial Unicode MS:antialias=false:autohint=false" },
143
144 // FreeMono is usually uglier than x fonts, so try after the others
145 { CS_UNICODE, "xft:FreeMono:autohint=true" },
146 #endif
147
148 // generic font fallback, put this last, as many iso10646 fonts have extents
149 // specified for all glyphs in the range they cover, but most are simply empty
150 //{ CS_UNICODE, "-*-*-*-r-*-*-*-*-*-*-c-*-iso10646-1" },
151 //{ CS_UNICODE, "-*-*-*-r-*-*-*-*-*-*-m-*-iso10646-1" },
152 { CS_UNKNOWN, 0 }
153 };
154
155 // these characters are used to guess the font height and width
156 // pango uses a similar algorithm and doesn't trust the font either.
157 static uint16_t extent_test_chars[] = {
158 '0', '1', '8', 'a', 'd', 'x', 'm', 'y', 'g', 'W', 'X', '\'', '_',
159 0x00cd, 0x00d5, 0x0114, 0x0177, 0x0643, // ÍÕĔŷﻙ
160 0x304c, 0x672c, // が本
161 };
162
163 #define dTermDisplay Display *disp = term->dpy
164 #define dTermGC GC gc = term->gc
165
166 /////////////////////////////////////////////////////////////////////////////
167
168 static const char *
enc_char(const text_t * text,uint32_t len,codeset cs,bool & zero)169 enc_char (const text_t *text, uint32_t len, codeset cs, bool &zero)
170 {
171 uint8_t *buf = rxvt_temp_buf<uint8_t> (len);
172 uint8_t *res = buf;
173
174 while (len--)
175 {
176 uint32_t c = FROM_UNICODE (cs, *text++);
177
178 if (c == NOCHAR)
179 {
180 c = 0;
181 zero = true;
182 }
183
184 *buf++ = c;
185 }
186
187 return (const char *)res;
188 }
189
190 static const XChar2b *
enc_xchar2b(const text_t * text,uint32_t len,codeset cs,bool & zero)191 enc_xchar2b (const text_t *text, uint32_t len, codeset cs, bool &zero)
192 {
193 XChar2b *buf = rxvt_temp_buf<XChar2b> (len);
194 XChar2b *res = buf;
195
196 while (len--)
197 {
198 uint32_t c = FROM_UNICODE (cs, *text++);
199
200 if (c == NOCHAR)
201 {
202 c = 0;
203 zero = true;
204 }
205
206 buf->byte1 = c >> 8;
207 buf->byte2 = c;
208 buf++;
209 }
210
211 return res;
212 }
213
214 /////////////////////////////////////////////////////////////////////////////
215
rxvt_font()216 rxvt_font::rxvt_font ()
217 : name(0), width(rxvt_fontprop::unset), height(rxvt_fontprop::unset)
218 {
219 }
220
221 void
set_name(char * name_)222 rxvt_font::set_name (char *name_)
223 {
224 if (name == name_)
225 return;
226
227 if (name) free (name); // let the compiler optimize
228 name = name_;
229 }
230
231 void
clear_rect(rxvt_drawable & d,int x,int y,int w,int h,int color)232 rxvt_font::clear_rect (rxvt_drawable &d, int x, int y, int w, int h, int color) const
233 {
234 dTermDisplay;
235 dTermGC;
236
237 if (color == Color_bg || color == Color_transparent)
238 XClearArea (disp, d, x, y, w, h, false);
239 else if (color >= 0)
240 {
241 #if XFT
242 Picture dst;
243
244 # ifdef HAVE_IMG
245 if (term->bg_img
246 && !term->pix_colors[color].is_opaque ()
247 && ((dst = XftDrawPicture (d))))
248 {
249 XClearArea (disp, d, x, y, w, h, false);
250
251 Picture solid_color_pict = XftDrawSrcPicture (d, &term->pix_colors[color].c);
252 XRenderComposite (disp, PictOpOver, solid_color_pict, None, dst, 0, 0, 0, 0, x, y, w, h);
253 }
254 else
255 # endif
256 XftDrawRect (d, &term->pix_colors[color].c, x, y, w, h);
257
258 #else
259 XSetForeground (disp, gc, term->pix_colors[color]);
260 XFillRectangle (disp, d, gc, x, y, w, h);
261 #endif
262 }
263 }
264
265 /////////////////////////////////////////////////////////////////////////////
266
267 struct rxvt_font_default : rxvt_font
268 {
269 struct rxvt_fontset *fs;
270
rxvt_font_defaultrxvt_font_default271 rxvt_font_default (rxvt_fontset *fs)
272 : rxvt_font ()
273 {
274 this->fs = fs;
275 }
276
propertiesrxvt_font_default277 rxvt_fontprop properties ()
278 {
279 rxvt_fontprop p;
280
281 p.width = p.height = 1;
282 p.ascent = rxvt_fontprop::unset;
283 p.weight = rxvt_fontprop::medium;
284 p.slant = rxvt_fontprop::roman;
285
286 return p;
287 }
288
loadrxvt_font_default289 bool load (const rxvt_fontprop &prop, bool force_prop)
290 {
291 width = 1; height = 1;
292 ascent = 1; descent = 0;
293
294 set_name (strdup ("built-in support font"));
295
296 return true;
297 }
298
has_charrxvt_font_default299 bool has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
300 {
301 careful = false;
302
303 if (unicode <= 0x001f)
304 return true;
305
306 if (unicode <= 0x007f)
307 return false;
308
309 if (unicode <= 0x009f)
310 return true;
311
312 #ifdef BUILTIN_GLYPHS
313 if (unicode >= 0x2500 && unicode <= 0x259f &&
314 !term->option (Opt_skipBuiltinGlyphs))
315 return true;
316 #endif
317
318 // we do not check for IS_COMPOSE here, as this would
319 // rob other fonts from taking over.
320
321 switch (unicode)
322 {
323 case ZERO_WIDTH_CHAR:
324 case NOCHAR:
325 return true;
326 }
327
328 return false;
329 }
330
331 void draw (rxvt_drawable &d, int x, int y,
332 const text_t *text, int len,
333 int fg, int bg);
334 };
335
336 void
draw(rxvt_drawable & d,int x,int y,const text_t * text,int len,int fg,int bg)337 rxvt_font_default::draw (rxvt_drawable &d, int x, int y,
338 const text_t *text, int len,
339 int fg, int bg)
340 {
341 dTermDisplay;
342 dTermGC;
343
344 clear_rect (d, x, y, term->fwidth * len, term->fheight, bg);
345
346 XSetForeground (disp, gc, term->pix_colors[fg]);
347
348 while (len)
349 {
350 const text_t *tp = text;
351 text_t t = *tp;
352
353 while (++text, --len && *text == NOCHAR)
354 ;
355
356 #if ENABLE_COMBINING
357 compose_char *cc;
358 #endif
359 int width = text - tp;
360 int fwidth = term->fwidth * width;
361
362 #ifdef BUILTIN_GLYPHS
363 if (0x2500 <= t && t <= 0x259f)
364 {
365 # include "table/linedraw.h"
366 uint16_t offs = linedraw_offs[t - 0x2500];
367 uint32_t *a = linedraw_command + (offs >> 4);
368 uint32_t *b = a + (offs & 15);
369
370 int W = fwidth;
371 int H = term->fheight;
372
373 int x_[16];
374 int y_[16];
375
376 for (int i = 0; i <= 8; i++)
377 {
378 x_[i] = x + ((W-1) * i + (i*7/8)) / 8;
379 y_[i] = y + ((H-1) * i + (i*7/8)) / 8;
380 }
381
382 x_[10] = x + (W - 1) / 2; x_[9] = x_[10] - 1; x_[11] = x_[10] + 1;
383 y_[10] = y + (H - 1) / 2; y_[9] = y_[10] - 1; y_[11] = y_[10] + 1;
384
385 XGCValues gcv;
386
387 gcv.cap_style = CapButt;
388 gcv.line_width = 0;
389 XChangeGC (disp, gc, GCLineWidth | GCCapStyle, &gcv);
390
391 while (a < b)
392 {
393 uint32_t command = *a++;
394
395 int op = (command >> 24) & 255;
396 int a = (command >> 20) & 15;
397 int b = (command >> 16) & 15;
398 int x1 = x_[(command >> 12) & 15];
399 int y1 = y_[(command >> 8) & 15];
400 int x2 = x_[(command >> 4) & 15];
401 int y2 = y_[(command >> 0) & 15];
402
403 switch (op)
404 {
405 case 0: // line
406 XDrawLine (disp, d, gc, x1, y1, x2, y2);
407 break;
408
409 case 1: // rectangle, possibly stippled
410 if (a)
411 {
412 static char bm[] = { 0,0 , 3,1 , 1,2 , 1,0 };
413
414 gcv.fill_style = FillStippled;
415 gcv.stipple = XCreateBitmapFromData (disp, d, bm + a * 2, 2, 2);
416 gcv.ts_x_origin = x;
417 gcv.ts_y_origin = y;
418
419 XChangeGC (disp, gc,
420 GCFillStyle | GCStipple | GCTileStipXOrigin | GCTileStipYOrigin,
421 &gcv);
422 }
423
424 XFillRectangle (disp, d, gc, x1, y1, x2 - x1 + 1, y2 - y1 + 1);
425
426 if (a)
427 {
428 XFreePixmap (disp, gcv.stipple);
429 gcv.stipple = 0;
430 gcv.fill_style = FillSolid;
431 XChangeGC (disp, gc, GCFillStyle, &gcv);
432 }
433 break;
434 case 2: // arc
435 XDrawArc (disp, d, gc,
436 x1 - W/2, y1 - H/2, W-1, H-1,
437 (a - 1) * 90*64, (b - 1) * 90*64);
438 break;
439 }
440 }
441 }
442 #else
443 if (0)
444 ;
445 #endif
446 #if ENABLE_COMBINING
447 else if (IS_COMPOSE (t) && (cc = rxvt_composite[t]))
448 {
449 min_it (width, 2); // we only support wcwidth up to 2
450 text_t chrs[2];
451 chrs [1] = NOCHAR;
452
453 *chrs = cc->c1;
454 rxvt_font *f1 = (*fs)[fs->find_font_idx (cc->c1)];
455 f1->draw (d, x, y, chrs, width, fg, bg);
456
457 if (cc->c2 != NOCHAR)
458 {
459 bool careful;
460
461 // prefer font of first character, for no good reasons
462 *chrs = cc->c2;
463 rxvt_font *f2 = (f1->has_char (cc->c2, 0, careful) && !careful)
464 ? f1
465 : (*fs)[fs->find_font_idx (cc->c2)];
466
467 f2->draw (d, x, y, chrs, width, fg, Color_none);
468 }
469 }
470 #endif
471 else
472 switch (t)
473 {
474 case '\t':
475 case ZERO_WIDTH_CHAR:
476 case NOCHAR:
477 break;
478
479 /*
480 * If the base font does not support variation selectors, treat them as ZWC.
481 * a point could be made to do this for all wcwidth == 0 characters, but I
482 * decided against that until more data is available.
483 */
484 case 0xfe00: case 0xfe01: case 0xfe02: case 0xfe03: case 0xfe04: case 0xfe05: case 0xfe06: case 0xfe07:
485 case 0xfe08: case 0xfe09: case 0xfe0a: case 0xfe0b: case 0xfe0c: case 0xfe0d: case 0xfe0e: case 0xfe0f:
486 break;
487
488 default:
489 XDrawRectangle (disp, d, gc, x + 2, y + 2,
490 fwidth - 4, term->fheight - 4);
491 }
492
493 x += fwidth;
494 }
495 }
496
497 struct rxvt_font_overflow : rxvt_font
498 {
499 struct rxvt_fontset *fs;
500
rxvt_font_overflowrxvt_font_overflow501 rxvt_font_overflow (rxvt_fontset *fs)
502 : rxvt_font ()
503 {
504 this->fs = fs;
505 }
506
propertiesrxvt_font_overflow507 rxvt_fontprop properties ()
508 {
509 rxvt_fontprop p;
510
511 p.width = p.height = 1;
512 p.ascent = rxvt_fontprop::unset;
513 p.weight = rxvt_fontprop::medium;
514 p.slant = rxvt_fontprop::roman;
515
516 return p;
517 }
518
loadrxvt_font_overflow519 bool load (const rxvt_fontprop &prop, bool force_prop)
520 {
521 width = 1; height = 1;
522 ascent = 1;
523 descent = (*fs)[2]->descent;
524
525 set_name (strdup ("built-in rendition overflow font"));
526
527 return true;
528 }
529
has_charrxvt_font_overflow530 bool has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
531 {
532 return false;
533 }
534
drawrxvt_font_overflow535 void draw (rxvt_drawable &d, int x, int y,
536 const text_t *text, int len,
537 int fg, int bg)
538 {
539 while (len)
540 {
541 int fid = fs->find_font_idx (*text);
542 int w = 1;
543 while (w < len && text[w] == NOCHAR)
544 w++;
545 (*fs)[fid]->draw (d, x, y, text, w, fg, bg);
546 text += w;
547 len -= w;
548 x += term->fwidth * w;
549 }
550 }
551 };
552
553 /////////////////////////////////////////////////////////////////////////////
554
555 struct rxvt_font_x11 : rxvt_font
556 {
rxvt_font_x11rxvt_font_x11557 rxvt_font_x11 () { f = 0; }
558
559 void clear ();
560
561 rxvt_fontprop properties ();
562
563 bool load (const rxvt_fontprop &prop, bool force_prop);
564
565 bool has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const;
566
567 void draw (rxvt_drawable &d, int x, int y,
568 const text_t *text, int len,
569 int fg, int bg);
570
571 bool slow; // whether this is a proportional font or has other funny characteristics
572 XFontStruct *f;
573 bool enc2b, encm;
574
575 char *get_property (XFontStruct *f, Atom property, const char *repl) const;
576 bool set_properties (rxvt_fontprop &p, int height, const char *weight, const char *slant, int avgwidth);
577 bool set_properties (rxvt_fontprop &p, XFontStruct *f);
578 bool set_properties (rxvt_fontprop &p, const char *name);
579 };
580
581 char *
get_property(XFontStruct * f,Atom property,const char * repl)582 rxvt_font_x11::get_property (XFontStruct *f, Atom property, const char *repl) const
583 {
584 unsigned long value;
585
586 if (XGetFontProperty (f, property, &value))
587 return XGetAtomName (term->dpy, value);
588 else
589 return repl ? strdup (repl) : 0;
590 }
591
592 rxvt_fontprop
properties()593 rxvt_font_x11::properties ()
594 {
595 rxvt_fontprop p;
596 set_properties (p, f);
597 return p;
598 }
599
600 bool
set_properties(rxvt_fontprop & p,int height,const char * weight,const char * slant,int avgwidth)601 rxvt_font_x11::set_properties (rxvt_fontprop &p, int height, const char *weight, const char *slant, int avgwidth)
602 {
603 p.width = width != rxvt_fontprop::unset ? width
604 : avgwidth ? (avgwidth + 1) / 10
605 : (height + 1) / 2;
606 p.height = height;
607 p.ascent = rxvt_fontprop::unset;
608 p.weight = *weight == 'B' || *weight == 'b' ? rxvt_fontprop::bold : rxvt_fontprop::medium;
609 p.slant = *slant == 'r' || *slant == 'R' ? rxvt_fontprop::roman : rxvt_fontprop::italic;
610
611 return true;
612 }
613
614 bool
set_properties(rxvt_fontprop & p,XFontStruct * f)615 rxvt_font_x11::set_properties (rxvt_fontprop &p, XFontStruct *f)
616 {
617 unsigned long height;
618
619 #if 0
620 if (!XGetFontProperty (f, XInternAtom (term->dpy, "PIXEL_SIZE", 0), &height))
621 return false;
622 #else
623 height = f->ascent + f->descent;
624 #endif
625
626 unsigned long avgwidth;
627 if (!XGetFontProperty (f, term->xa [XA_AVERAGE_WIDTH], &avgwidth))
628 avgwidth = 0;
629
630 char *weight = get_property (f, term->xa [XA_WEIGHT_NAME], "medium");
631 char *slant = get_property (f, term->xa [XA_SLANT], "r");
632
633 set_properties (p, height, weight, slant, avgwidth);
634
635 free (weight);
636 free (slant);
637
638 p.ascent = f->ascent;
639
640 return true;
641 }
642
643 bool
set_properties(rxvt_fontprop & p,const char * name)644 rxvt_font_x11::set_properties (rxvt_fontprop &p, const char *name)
645 {
646 dTermDisplay;
647 int slashes = 0;
648 const char *comp[13];
649
650 for (const char *c = name; *c; c++)
651 if (*c == '-')
652 {
653 comp[slashes++] = c + 1;
654 if (slashes >= 13)
655 break;
656 }
657
658 /* can we short-circuit the costly XLoadQueryFont? */
659 if (slashes >= 13
660 && (*comp[ 6] >= '1' && *comp[ 6] <= '9')
661 && (*comp[11] >= '0' && *comp[11] <= '9'))
662 return set_properties (p, atoi (comp[6]), comp[2], comp[3], atoi (comp[11]));
663
664 XFontStruct *f = XLoadQueryFont (disp, name);
665
666 if (f)
667 {
668 // the font should really exist now. if not, we have a problem
669 // (e.g. if the user did xset fp rehash just when we were searching fonts).
670 // in that case, just return garbage.
671 bool ret = set_properties (p, f);
672 XFreeFont (disp, f);
673 return ret;
674 }
675 else
676 return false;
677 }
678
679 // fix the size of scalable fonts
680 static bool
replace_field(char ** ptr,const char * name,int index,const char old,const char * replace)681 replace_field (char **ptr, const char *name, int index, const char old, const char *replace)
682 {
683 int slashes = 0;
684 const char *field, *end;
685
686 for (const char *c = name; *c; c++)
687 if (*c == '-')
688 {
689 if (slashes == index)
690 field = c + 1;
691
692 if (slashes == index + 1)
693 end = c;
694
695 if (++slashes >= 13)
696 break;
697 }
698
699 if (slashes >= 13 && (!old || *field == old))
700 {
701 size_t len = field - name;
702 *ptr = (char *)malloc (len + strlen (replace) + strlen (end) + 1);
703 memcpy (*ptr, name, len);
704 strcpy (*ptr + len, replace);
705 strcat (*ptr, end);
706
707 return true;
708 }
709 else
710 {
711 *ptr = strdup (name);
712
713 return false;
714 }
715 }
716
717 bool
load(const rxvt_fontprop & prop,bool force_prop)718 rxvt_font_x11::load (const rxvt_fontprop &prop, bool force_prop)
719 {
720 dTermDisplay;
721
722 clear ();
723
724 char field_str[64]; // enough for 128 bits
725
726 // first morph the font if required
727 if (force_prop)
728 {
729 char *fname;
730
731 if (name[0] != '-')
732 {
733 f = XLoadQueryFont (disp, name);
734
735 if (!f)
736 return false;
737
738 char *new_name = get_property (f, XA_FONT, 0);
739
740 if (new_name)
741 set_name (new_name);
742 else
743 rxvt_warn ("font '%s' has no FONT property, continuing without.\n", name);
744
745 XFreeFont (disp, f);
746 f = 0;
747 }
748
749 if (prop.weight != rxvt_fontprop::unset)
750 {
751 replace_field (&fname, name, 2, 0,
752 prop.weight < rxvt_fontprop::bold
753 ? "medium" : "bold");
754 set_name (fname);
755 }
756
757 if (prop.slant != rxvt_fontprop::unset)
758 {
759 replace_field (&fname, name, 3, 0,
760 prop.slant < rxvt_fontprop::italic
761 ? "r" : "i"); // TODO: handle "o"blique, too
762 set_name (fname);
763 }
764 }
765
766 sprintf (field_str, "%d", prop.height == rxvt_fontprop::unset
767 ? 0 : prop.height);
768
769 struct font_weight {
770 char *name;
771 int diff;
772
773 void clear ()
774 {
775 name = 0;
776 diff = 0x7fffffff;
777 }
778
779 font_weight () { clear (); }
780 ~font_weight () { free (name); }
781 };
782
783 char **list;
784 int count;
785 list = XListFonts (disp, name, 4000, &count);
786
787 set_name (0);
788
789 if (!list)
790 return false;
791
792 font_weight *fonts = new font_weight[count];
793
794 for (int i = 0; i < count; i++)
795 {
796 rxvt_fontprop p;
797 char *fname;
798
799 int diff = 0;
800
801 if (replace_field (&fname, list[i], 6, '0', field_str))
802 diff += 10; // slightly penalize scalable fonts
803 else
804 {
805 free (fname);
806 if (replace_field (&fname, list[i], 11, '0', "0"))
807 diff += 300; // more heavily penalize what looks like scaled bitmap fonts
808 }
809
810 if (!set_properties (p, fname)
811 // also weed out too large fonts
812 || (prop.height != rxvt_fontprop::unset
813 && p.height > prop.height))
814 {
815 free (fname);
816 continue;
817 }
818
819 if (prop.height != rxvt_fontprop::unset) diff += (prop.height - p.height) * 128;
820 if (prop.weight != rxvt_fontprop::unset) diff += abs (prop.weight - p.weight);
821 if (prop.slant != rxvt_fontprop::unset) diff += abs (prop.slant - p.slant);
822 //if (prop.width != rxvt_fontprop::unset) diff += abs (prop.width - p.width);
823
824 fonts[i].name = fname;
825 fonts[i].diff = diff;
826 }
827
828 XFreeFontNames (list);
829
830 // this loop only iterates when the guessed font-size is too small
831 for (;;)
832 {
833 font_weight *best = fonts;
834
835 for (font_weight *w = fonts + 1; w < fonts + count; w++)
836 if (w->diff < best->diff)
837 best = w;
838
839 if (!best->name
840 || !(f = XLoadQueryFont (disp, best->name)))
841 break;
842
843 set_name (best->name);
844 best->clear ();
845
846 ascent = f->ascent;
847 descent = f->descent;
848 height = ascent + descent;
849
850 if (prop.height == rxvt_fontprop::unset
851 || height <= prop.height)
852 break; // font is ready for use
853
854 // PIXEL_SIZE small enough, but real height too large
855 clear ();
856 }
857
858 delete [] fonts;
859
860 if (!f)
861 return false;
862
863 char *registry = get_property (f, term->xa [XA_CHARSET_REGISTRY], 0);
864 char *encoding = get_property (f, term->xa [XA_CHARSET_ENCODING], 0);
865
866 cs = CS_UNKNOWN;
867
868 if (registry && encoding)
869 {
870 char charset[64];
871 snprintf (charset, 64, "%s-%s", registry, encoding);
872
873 cs = codeset_from_name (charset);
874
875 if (cs == CS_UNKNOWN)
876 rxvt_warn ("%s: cannot deduce encoding from registry/encoding properties \"%s\", ignoring font.\n", name, charset);
877 }
878
879 free (registry);
880 free (encoding);
881
882 if (cs == CS_UNKNOWN)
883 {
884 char *value = get_property (f, XA_FONT, 0);
885 const char *charset = value;
886
887 if (!charset)
888 charset = name;
889
890 int count = 13;
891 while (*charset)
892 if (*charset++ == '-' && !--count)
893 break;
894
895 cs = codeset_from_name (charset);
896 if (cs == CS_UNKNOWN)
897 rxvt_warn ("%s: cannot deduce encoding from font name property \"%s\", ignoring font.\n", name, charset);
898
899 free (value);
900 }
901
902 if (cs == CS_UNKNOWN)
903 {
904 clear ();
905 return false;
906 }
907
908 if (cs == CS_UNICODE)
909 cs = CS_UNICODE_16; // X11 can have a max. of 65536 chars per font
910
911 encm = f->min_byte1 != 0 || f->max_byte1 != 0;
912 enc2b = encm || f->max_char_or_byte2 > 255;
913
914 slow = false;
915
916 #if 1 // only used for slow detection, TODO optimize
917 if (f->min_bounds.width == f->max_bounds.width || !f->per_char)
918 width = f->max_bounds.width;
919 else
920 {
921 slow = true;
922
923 int N = f->max_char_or_byte2 - f->min_char_or_byte2;
924
925 if (encm)
926 N += (f->max_byte1 - f->min_byte1)
927 * (f->max_char_or_byte2 - f->min_char_or_byte2 + 1);
928
929 while (N)
930 {
931 if (f->per_char[N].width > width)
932 width = f->per_char[N].width;
933
934 --N;
935 }
936 }
937 #endif
938
939 width = 1;
940
941 for (uint16_t *t = extent_test_chars; t < extent_test_chars + ecb_array_length (extent_test_chars); t++)
942 {
943 if (FROM_UNICODE (cs, *t) == NOCHAR)
944 continue;
945
946 // ignore characters we wouldn't use anyways
947 bool careful;
948 if (!has_char (*t, &prop, careful))
949 continue;
950
951 // the casts are needed in C++11 (see 8.5.1)
952 XChar2b ch = { (unsigned char)(*t >> 8), (unsigned char)*t };
953
954 XCharStruct g;
955 int dir_ret, asc_ret, des_ret;
956 XTextExtents16 (f, &ch, 1, &dir_ret, &asc_ret, &des_ret, &g);
957
958 int wcw = WCWIDTH (*t);
959 if (wcw > 0) g.width = (g.width + wcw - 1) / wcw;
960
961 if (width < g.width) width = g.width;
962 }
963
964 #if 0 // do it per-character
965 if (prop && width > prop->width)
966 {
967 clear ();
968 return false;
969 }
970 #endif
971
972 return true;
973 }
974
975 void
clear()976 rxvt_font_x11::clear ()
977 {
978 if (f)
979 {
980 XFreeFont (term->dpy, f);
981 f = 0;
982 }
983 }
984
985 bool
has_char(unicode_t unicode,const rxvt_fontprop * prop,bool & careful)986 rxvt_font_x11::has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
987 {
988 careful = false;
989
990 uint32_t ch = FROM_UNICODE (cs, unicode);
991
992 if (ch == NOCHAR)
993 return false;
994
995 /* check whether the character exists in _this_ font. horrible. */
996 XCharStruct *xcs;
997
998 if (encm)
999 {
1000 unsigned char byte1 = ch >> 8;
1001 unsigned char byte2 = ch & 255;
1002
1003 if (byte1 < f->min_byte1 || byte1 > f->max_byte1
1004 || byte2 < f->min_char_or_byte2 || byte2 > f->max_char_or_byte2)
1005 return false;
1006
1007 if (f->per_char)
1008 {
1009 int D = f->max_char_or_byte2 - f->min_char_or_byte2 + 1;
1010 int N = (byte1 - f->min_byte1) * D + byte2 - f->min_char_or_byte2;
1011
1012 xcs = f->per_char + N;
1013 }
1014 else
1015 xcs = &f->max_bounds;
1016 }
1017 else
1018 {
1019 if (ch < f->min_char_or_byte2 || ch > f->max_char_or_byte2)
1020 return false;
1021
1022 if (f->per_char)
1023 xcs = f->per_char + (ch - f->min_char_or_byte2);
1024 else
1025 xcs = &f->max_bounds;
1026 }
1027
1028 if (xcs->lbearing == 0 && xcs->rbearing == 0 && xcs->width == 0
1029 && xcs->ascent == 0 && xcs->descent == 0)
1030 return false;
1031
1032 if (!prop || prop->width == rxvt_fontprop::unset)
1033 return true;
1034
1035 // check whether character overlaps previous/next character
1036 int w = xcs->rbearing - xcs->lbearing;
1037 int wcw = max (WCWIDTH (unicode), 1);
1038
1039 careful = xcs->lbearing < 0 || xcs->rbearing > prop->width * wcw;
1040
1041 if (careful && !OVERLAP_OK (w, wcw, prop))
1042 return false;
1043
1044 return true;
1045 }
1046
1047 void
draw(rxvt_drawable & d,int x,int y,const text_t * text,int len,int fg,int bg)1048 rxvt_font_x11::draw (rxvt_drawable &d, int x, int y,
1049 const text_t *text, int len,
1050 int fg, int bg)
1051 {
1052 // this looks like a mess /.
1053 // and it is a mess /.
1054 // yet we are trying to be perfect /.
1055 // but the result still isn't perfect /.
1056
1057 dTermDisplay;
1058 dTermGC;
1059
1060 bool slow = this->slow
1061 || width != term->fwidth
1062 || height != term->fheight
1063 || ascent != f->ascent;
1064
1065 int base = ascent; // sorry, incorrect: term->fbase;
1066
1067 XGCValues v;
1068 v.foreground = term->pix_colors[fg];
1069 v.font = f->fid;
1070
1071 if (enc2b)
1072 {
1073 const XChar2b *xc = enc_xchar2b (text, len, cs, slow);
1074
1075 if (bg == Color_bg && !slow)
1076 {
1077 v.background = term->pix_colors[bg];
1078 XChangeGC (disp, gc, GCForeground | GCBackground | GCFont, &v);
1079 XDrawImageString16 (disp, d, gc, x, y + base, xc, len);
1080 }
1081 else
1082 {
1083 clear_rect (d, x, y, term->fwidth * len, term->fheight, bg);
1084
1085 XChangeGC (disp, gc, GCForeground | GCFont, &v);
1086
1087 if (slow)
1088 {
1089 do
1090 {
1091 if (xc->byte1 || xc->byte2)
1092 XDrawString16 (disp, d, gc, x, y + base, xc, 1);
1093
1094 x += term->fwidth;
1095 xc++; len--;
1096 }
1097 while (len);
1098 }
1099 else
1100 XDrawString16 (disp, d, gc, x, y + base, xc, len);
1101 }
1102 }
1103 else
1104 {
1105 const char *xc = enc_char (text, len, cs, slow);
1106
1107 if (bg == Color_bg && !slow)
1108 {
1109 v.background = term->pix_colors[bg];
1110 XChangeGC (disp, gc, GCForeground | GCBackground | GCFont, &v);
1111 XDrawImageString (disp, d, gc, x, y + base, xc, len);
1112 }
1113 else
1114 {
1115 clear_rect (d, x, y, term->fwidth * len, term->fheight, bg);
1116
1117 XChangeGC (disp, gc, GCForeground | GCFont, &v);
1118
1119 if (slow)
1120 {
1121 do
1122 {
1123 if (*xc)
1124 XDrawString (disp, d, gc, x, y + base, xc, 1);
1125
1126 x += term->fwidth;
1127 xc++; len--;
1128 }
1129 while (len);
1130 }
1131 else
1132 XDrawString (disp, d, gc, x, y + base, xc, len);
1133 }
1134 }
1135 }
1136
1137 /////////////////////////////////////////////////////////////////////////////
1138
1139 #if XFT
1140
1141 struct rxvt_font_xft : rxvt_font
1142 {
1143 #if XFT_CHAR_CACHE
1144 // we cache the qascii range xoffsets in the name of speed,
1145 // expecting terminals to deal mostly with these characters
1146 // we also assume the xoff always fits into uint8_t,
1147 // which is questionable, but let's see...
1148 // also, it is uncomfortably big, due to the uints.
1149 enum { char_cache_min = 0x20, char_cache_max = 0x7e };
1150 uint8_t xoff_cache [char_cache_max - char_cache_min + 1];
1151 FT_UInt glyph_cache [char_cache_max - char_cache_min + 1];
1152 #endif
1153
rxvt_font_xftrxvt_font_xft1154 rxvt_font_xft ()
1155 {
1156 f = 0;
1157 }
1158
1159 void clear ();
1160
1161 rxvt_fontprop properties ();
1162
1163 bool load (const rxvt_fontprop &prop, bool force_prop);
1164
1165 void draw (rxvt_drawable &d, int x, int y,
1166 const text_t *text, int len,
1167 int fg, int bg);
1168
1169 bool has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const;
1170
1171 protected:
1172 XftFont *f;
1173 };
1174
1175 void
clear()1176 rxvt_font_xft::clear ()
1177 {
1178 if (f)
1179 {
1180 XftFontClose (term->dpy, f);
1181 f = 0;
1182 }
1183 }
1184
1185 rxvt_fontprop
properties()1186 rxvt_font_xft::properties ()
1187 {
1188 rxvt_fontprop p;
1189
1190 FT_Face face = XftLockFace (f);
1191
1192 p.width = width;
1193 p.height = height;
1194 p.ascent = ascent;
1195 p.weight = face->style_flags & FT_STYLE_FLAG_BOLD
1196 ? rxvt_fontprop::bold : rxvt_fontprop::medium;
1197 p.slant = face->style_flags & FT_STYLE_FLAG_ITALIC
1198 ? rxvt_fontprop::italic : rxvt_fontprop::roman;
1199
1200 XftUnlockFace (f);
1201
1202 return p;
1203 }
1204
1205 bool
load(const rxvt_fontprop & prop,bool force_prop)1206 rxvt_font_xft::load (const rxvt_fontprop &prop, bool force_prop)
1207 {
1208 dTermDisplay;
1209
1210 clear ();
1211
1212 FcPattern *p = FcNameParse ((FcChar8 *) name);
1213
1214 if (!p)
1215 return false;
1216
1217 FcValue v;
1218
1219 if (prop.height != rxvt_fontprop::unset
1220 && (FcPatternGet (p, FC_PIXEL_SIZE, 0, &v) != FcResultMatch
1221 && FcPatternGet (p, FC_SIZE, 0, &v) != FcResultMatch))
1222 FcPatternAddInteger (p, FC_PIXEL_SIZE, prop.height);
1223
1224 if (prop.weight != rxvt_fontprop::unset
1225 && (force_prop || FcPatternGet (p, FC_WEIGHT, 0, &v) != FcResultMatch))
1226 FcPatternAddInteger (p, FC_WEIGHT, prop.weight);
1227
1228 if (prop.slant != rxvt_fontprop::unset
1229 && (force_prop || FcPatternGet (p, FC_SLANT, 0, &v) != FcResultMatch))
1230 FcPatternAddInteger (p, FC_SLANT, prop.slant);
1231
1232 #if 0 // clipping unfortunately destroys our precious double-width-characters
1233 // clip width, we can't do better, or can we?
1234 if (FcPatternGet (p, FC_CHAR_WIDTH, 0, &v) != FcResultMatch)
1235 FcPatternAddInteger (p, FC_CHAR_WIDTH, prop.width);
1236 #endif
1237
1238 if (FcPatternGet (p, FC_MINSPACE, 0, &v) != FcResultMatch)
1239 FcPatternAddBool (p, FC_MINSPACE, 1);
1240
1241 // store generated name so iso14755 view gives better results
1242 set_name ((char *)FcNameUnparse (p));
1243
1244 XftResult result;
1245 FcPattern *match = XftFontMatch (disp, term->display->screen, p, &result);
1246
1247 FcPatternDestroy (p);
1248
1249 if (!match)
1250 return false;
1251
1252 int ftheight = 0;
1253 bool success = true;
1254
1255 for (;;)
1256 {
1257 p = FcPatternDuplicate (match);
1258 f = XftFontOpenPattern (disp, p);
1259
1260 if (!f)
1261 {
1262 FcPatternDestroy (p);
1263 success = false;
1264 break;
1265 }
1266
1267 FT_Face face = XftLockFace (f);
1268
1269 // fuck me plenty: XftLockFace can actually return 0. try not to crash.
1270 // we also assume blindly that if the first lock succeeeds, then subsequent
1271 // locks will also succeed.
1272 if (!face)
1273 {
1274 XftFontClose (disp, f);
1275 success = false;
1276 break;
1277 }
1278
1279 ascent = (face->size->metrics.ascender + 63) >> 6;
1280 descent = (-face->size->metrics.descender + 63) >> 6;
1281 height = max (ascent + descent, (face->size->metrics.height + 63) >> 6);
1282 width = 0;
1283
1284 bool scalable = face->face_flags & FT_FACE_FLAG_SCALABLE;
1285
1286 XftUnlockFace (f);
1287
1288 int glheight = height;
1289
1290 for (uint16_t *t = extent_test_chars; t < extent_test_chars + ecb_array_length (extent_test_chars); t++)
1291 {
1292 FcChar16 ch = *t;
1293
1294 if (cs != CS_UNICODE
1295 && ch > 0x100
1296 && FROM_UNICODE (cs, ch) == NOCHAR)
1297 continue;
1298
1299 // ignore characters we wouldn't use anyways
1300 bool careful;
1301 if (!has_char (*t, &prop, careful))
1302 continue;
1303
1304 XGlyphInfo g;
1305 XftTextExtents16 (disp, f, &ch, 1, &g);
1306
1307 g.width -= g.x;
1308
1309 int wcw = WCWIDTH (ch);
1310 if (wcw > 0) g.width = (g.width + wcw - 1) / wcw;
1311
1312 if (width < g.width ) width = g.width;
1313 if (height < g.height ) height = g.height;
1314 if (glheight < g.height - g.y) glheight = g.height - g.y;
1315 }
1316
1317 if (!width)
1318 {
1319 rxvt_warn ("unable to calculate font width for '%s', using max_advance_width.\n", name);
1320 width = f->max_advance_width;
1321 break;
1322 }
1323
1324 if (prop.height == rxvt_fontprop::unset
1325 || (height <= prop.height && glheight <= prop.height)
1326 || height <= 2
1327 || !scalable)
1328 break;
1329
1330 if (ftheight)
1331 {
1332 // take smaller steps near the end
1333 if (height > prop.height + 1) ftheight++;
1334 if (height > prop.height + 2) ftheight++;
1335 if (height > prop.height + 3) ftheight++;
1336
1337 ftheight -= height - prop.height;
1338 }
1339 else
1340 ftheight = prop.height - 1;
1341
1342 XftFontClose (disp, f);
1343 FcPatternDel (match, FC_PIXEL_SIZE);
1344 FcPatternAddInteger (match, FC_PIXEL_SIZE, ftheight);
1345 }
1346
1347 FcPatternDestroy (match);
1348
1349 #if 0 // do it per-character
1350 if (prop.width != rxvt_fontprop::unset && width > prop.width)
1351 {
1352 clear ();
1353 success = false;
1354 }
1355 #endif
1356
1357 #if XFT_CHAR_CACHE
1358 // populate char cache
1359 for (FcChar16 ch = char_cache_min; ch <= char_cache_max; ++ch)
1360 {
1361 FT_UInt glyph = XftCharIndex (disp, f, ch);
1362 glyph_cache [ch - char_cache_min] = glyph;
1363
1364 XGlyphInfo g;
1365 XftGlyphExtents (disp, f, &glyph, 1, &g);
1366 xoff_cache [ch - char_cache_min] = g.xOff;
1367 }
1368 #endif
1369
1370 return success;
1371 }
1372
1373 bool
has_char(unicode_t unicode,const rxvt_fontprop * prop,bool & careful)1374 rxvt_font_xft::has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
1375 {
1376 careful = false;
1377
1378 // handle non-bmp chars when text_t is 16 bit
1379 #if ENABLE_COMBINING && !UNICODE_3
1380 if (ecb_expect_false (IS_COMPOSE (unicode)))
1381 if (compose_char *cc = rxvt_composite [unicode])
1382 if (cc->c2 == NOCHAR)
1383 unicode = cc->c1;
1384 else
1385 return false;
1386 else
1387 return false;
1388 #endif
1389
1390 FcChar32 chr = unicode;
1391
1392 if (!XftCharExists (term->dpy, f, chr))
1393 return false;
1394
1395 if (!prop || prop->width == rxvt_fontprop::unset)
1396 return true;
1397
1398 int wcw = max (WCWIDTH (chr), 1);
1399
1400 XGlyphInfo g;
1401 XftTextExtents32 (term->dpy, f, &chr, 1, &g);
1402
1403 int cwidth = prop->width * wcw;
1404
1405 // use same adjustments as in ->draw, see there
1406 g.x += g.xOff ? cwidth - g.xOff >> 1 : 0;
1407 g.x += g.xOff ? 0 : cwidth;
1408
1409 int w = g.width - g.x;
1410
1411 careful = g.x > 0 || w > cwidth;
1412
1413 if (careful && !OVERLAP_OK (w, wcw, prop))
1414 return false;
1415
1416 // this weeds out _totally_ broken fonts, or glyphs
1417 if (!OVERLAP_OK (g.xOff, wcw, prop))
1418 return false;
1419
1420 return true;
1421 }
1422
1423 void
draw(rxvt_drawable & d,int x,int y,const text_t * text,int len,int fg,int bg)1424 rxvt_font_xft::draw (rxvt_drawable &d, int x, int y,
1425 const text_t *text, int len,
1426 int fg, int bg)
1427 {
1428 XftGlyphSpec *enc = rxvt_temp_buf<XftGlyphSpec> (len);
1429 XftGlyphSpec *ep = enc;
1430
1431 dTermDisplay;
1432 dTermGC;
1433
1434 int w = term->fwidth * len;
1435 int h = term->fheight;
1436
1437 bool buffered = bg >= Color_transparent
1438 && term->option (Opt_buffered);
1439
1440 // cut trailing spaces
1441 while (len && text [len - 1] == ' ')
1442 len--;
1443
1444 int x_ = buffered ? 0 : x;
1445 int y_ = buffered ? 0 : y;
1446
1447 while (len)
1448 {
1449 int cwidth = term->fwidth;
1450 FcChar32 chr = *text++; len--;
1451
1452 while (len && *text == NOCHAR)
1453 text++, len--, cwidth += term->fwidth;
1454
1455 if (chr != ' ') // skip spaces
1456 {
1457 // handle non-bmp chars when text_t is 16 bit
1458 #if ENABLE_COMBINING && !UNICODE_3
1459 if (ecb_expect_false (IS_COMPOSE (chr)))
1460 if (compose_char *cc = rxvt_composite [chr])
1461 if (cc->c2 == NOCHAR)
1462 chr = cc->c1;
1463 #endif
1464
1465 #if 0
1466 FT_UInt glyphs [decltype (exp)::max_size];
1467
1468 for (int i = 0; i < nchrs; ++i)
1469 glyphs [i] = XftCharIndex (disp, f, chrs [i]);
1470
1471 for (int i = 0; i < nchrs; ++i)
1472 {
1473 XGlyphInfo ep;
1474 XftGlyphExtents (disp, f, glyphs+i, 1, &ep);
1475 printf ("gs %4x g %4x + %3d,%3d o %3d,%3d wh %3d,%3d\n", chrs[i],glyphs[i],ep.x,ep.y,ep.xOff,ep.yOff,ep.width,ep.height);
1476 }
1477 #endif
1478
1479 FT_UInt glyph;
1480 int xOff;
1481
1482 #if XFT_CHAR_CACHE
1483 if (ecb_expect_true (IN_RANGE_INC (chr, char_cache_min, char_cache_max)))
1484 {
1485 glyph = glyph_cache [chr - char_cache_min];
1486 xOff = xoff_cache [chr - char_cache_min];
1487 }
1488 else
1489 #endif
1490 {
1491 glyph = XftCharIndex (disp, f, chr);
1492 XGlyphInfo extents;
1493 XftGlyphExtents (disp, f, &glyph, 1, &extents);
1494 xOff = extents.xOff;
1495 }
1496
1497 ep->glyph = glyph;
1498 ep->x = x_;
1499 ep->y = y_ + ascent;
1500
1501 // the xft font cell might differ from the terminal font cell,
1502 // in which case we use the average between the two.
1503 ep->x += xOff ? cwidth - xOff >> 1 : 0;
1504
1505 // xft/freetype represent combining characters as characters with zero
1506 // width rendered over the previous character with some fonts, while
1507 // in other fonts, they are considered normal characters, while yet
1508 // in other fonts, they are shifted all over the place.
1509 // we handle the first two cases by keying off on xOff being 0
1510 // for zero-width chars. normally, we would add extents.xOff
1511 // of the base character here, but we don't have that, so we use cwidth.
1512 ep->x += xOff ? 0 : cwidth;
1513
1514 ++ep;
1515 }
1516
1517 x_ += cwidth;
1518 }
1519
1520 if (buffered)
1521 {
1522 if (ep != enc)
1523 {
1524 rxvt_drawable &d2 = d.screen->scratch_drawable (w, h);
1525
1526 #ifdef HAVE_IMG
1527 Picture dst = 0; // the only assignment is done conditionally in the following if condition
1528
1529 if (term->bg_img
1530 && (bg == Color_transparent || bg == Color_bg
1531 || (bg >= 0 && !term->pix_colors[bg].is_opaque () && ((dst = XftDrawPicture (d2))))))
1532 {
1533 int src_x = x, src_y = y;
1534
1535 if (term->bg_flags & rxvt_term::BG_IS_TRANSPARENT)
1536 {
1537 src_x += term->window_vt_x;
1538 src_y += term->window_vt_y;
1539 }
1540
1541 if (term->bg_img->w >= src_x + w
1542 && term->bg_img->h >= src_y + h)
1543 {
1544 XCopyArea (disp, term->bg_img->pm, d2, gc,
1545 src_x, src_y, w, h, 0, 0);
1546 }
1547 else
1548 {
1549 XGCValues gcv;
1550
1551 gcv.fill_style = FillTiled;
1552 gcv.tile = term->bg_img->pm;
1553 gcv.ts_x_origin = -src_x;
1554 gcv.ts_y_origin = -src_y;
1555
1556 XChangeGC (disp, gc,
1557 GCTile | GCTileStipXOrigin | GCTileStipYOrigin | GCFillStyle,
1558 &gcv);
1559
1560 XFillRectangle (disp, d2, gc, 0, 0, w, h);
1561
1562 gcv.fill_style = FillSolid;
1563 XChangeGC (disp, gc, GCFillStyle, &gcv);
1564 }
1565
1566 if (dst)
1567 {
1568 Picture solid_color_pict = XftDrawSrcPicture (d2, &term->pix_colors[bg].c);
1569
1570 // dst can only be set when bg >= 0
1571 XRenderComposite (disp, PictOpOver, solid_color_pict, None, dst, 0, 0, 0, 0, 0, 0, w, h);
1572 }
1573 }
1574 else
1575 #endif
1576 XftDrawRect (d2, &term->pix_colors[bg >= 0 ? bg : Color_bg].c, 0, 0, w, h);
1577
1578 XftDrawGlyphSpec (d2, &term->pix_colors[fg].c, f, enc, ep - enc);
1579 XCopyArea (disp, d2, d, gc, 0, 0, w, h, x, y);
1580 }
1581 else
1582 clear_rect (d, x, y, w, h, bg);
1583 }
1584 else
1585 {
1586 clear_rect (d, x, y, w, h, bg);
1587 XftDrawGlyphSpec (d, &term->pix_colors[fg].c, f, enc, ep - enc);
1588 }
1589 }
1590
1591 #endif
1592
1593 /////////////////////////////////////////////////////////////////////////////
1594
rxvt_fontset(rxvt_term * term)1595 rxvt_fontset::rxvt_fontset (rxvt_term *term)
1596 : fontdesc (0), term (term)
1597 {
1598 clear ();
1599 }
1600
~rxvt_fontset()1601 rxvt_fontset::~rxvt_fontset ()
1602 {
1603 clear ();
1604 }
1605
1606 void
clear()1607 rxvt_fontset::clear ()
1608 {
1609 prop.width = prop.height = prop.ascent = prop.weight = prop.slant
1610 = rxvt_fontprop::unset;
1611 force_prop = false;
1612
1613 for (rxvt_font **i = fonts.begin (); i != fonts.end (); i++)
1614 (*i)->unref ();
1615
1616 for (pagemap **p = fmap.begin (); p != fmap.end (); p++)
1617 delete *p;
1618
1619 free (fontdesc); fontdesc = 0;
1620
1621 fonts.clear ();
1622
1623 fallback = fallback_fonts;
1624 }
1625
1626 void
prepare_font(rxvt_font * font,codeset cs)1627 rxvt_fontset::prepare_font (rxvt_font *font, codeset cs)
1628 {
1629 font->set_term (term);
1630
1631 font->cs = cs;
1632 font->loaded = false;
1633 }
1634
1635 rxvt_font *
new_font(const char * name,codeset cs)1636 rxvt_fontset::new_font (const char *name, codeset cs)
1637 {
1638 rxvt_font *f;
1639
1640 if (!name || !*name)
1641 {
1642 name = "";
1643 f = new rxvt_font_default (this);
1644 }
1645 #if XFT
1646 else if (!strncmp (name, "xft:", 4))
1647 {
1648 name += 4;
1649 f = new rxvt_font_xft ();
1650 }
1651 #endif
1652 else if (!strncmp (name, "x:", 2))
1653 {
1654 name += 2;
1655 f = new rxvt_font_x11;
1656 }
1657 else
1658 f = new rxvt_font_x11;
1659
1660 f->set_name (strdup (name));
1661 prepare_font (f, cs);
1662
1663 return f;
1664 }
1665
1666 /////////////////////////////////////////////////////////////////////////////
1667
1668 void
push_font(rxvt_font * font)1669 rxvt_fontset::push_font (rxvt_font *font)
1670 {
1671 // the fontCount index is reserved for the overflow font, it is only
1672 // necessary when we get fontCount or more fonts, as they cannot be
1673 // represented in the rendition.
1674 if (fonts.size () == fontCount)
1675 {
1676 rxvt_font *f = new rxvt_font_overflow (this);
1677
1678 prepare_font (f, CS_UNICODE);
1679 fonts.push_back (f);
1680 }
1681
1682 fonts.push_back (font);
1683 }
1684
1685 void
add_fonts(const char * desc)1686 rxvt_fontset::add_fonts (const char *desc)
1687 {
1688 if (desc)
1689 {
1690 char buf[512];
1691 const char *end;
1692
1693 do
1694 {
1695 while (*desc && *desc <= ' ')
1696 desc++;
1697
1698 codeset cs = CS_UNICODE;
1699
1700 if (*desc == '[')
1701 {
1702 char spec[256];
1703 const char *extra = ++desc; // not yet used
1704
1705 desc = strchr (desc, ']');
1706
1707 if (!desc)
1708 {
1709 rxvt_warn ("ERROR: opening '[' without closing ']' in font specification, trying to continue.\n");
1710 break;
1711 }
1712
1713 memcpy (spec, extra, min (desc - extra, 255));
1714 spec[min (desc - extra, 255)] = 0;
1715
1716 if (!strncmp (extra, "codeset=", sizeof ("codeset=") - 1))
1717 cs = codeset_from_name (spec + sizeof ("codeset=") - 1);
1718 else
1719 rxvt_warn ("unknown parameter '%s' in font specification, skipping.\n", spec);
1720
1721 desc++;
1722 while (*desc <= ' ' && *desc) desc++;
1723 }
1724
1725 end = strchr (desc, ',');
1726 if (!end)
1727 end = desc + strlen (desc);
1728
1729 if (end - desc < 511)
1730 {
1731 memcpy (buf, desc, end - desc);
1732 buf[end - desc] = 0;
1733
1734 push_font (new_font (buf, cs));
1735 }
1736 else
1737 rxvt_warn ("fontset element too long (>511 bytes), ignored.\n");
1738
1739 desc = end + 1;
1740 }
1741 while (*end);
1742 }
1743 }
1744
1745 bool
realize_font(int i)1746 rxvt_fontset::realize_font (int i)
1747 {
1748 if (i < 0 || i >= fonts.size ())
1749 return false;
1750
1751 if (fonts[i]->loaded)
1752 return true;
1753
1754 fonts[i]->loaded = true;
1755
1756 if (!fonts[i]->load (prop, force_prop))
1757 {
1758 fonts[i]->cs = CS_UNKNOWN;
1759 return false;
1760 }
1761
1762 return true;
1763 }
1764
1765 bool
populate(const char * desc)1766 rxvt_fontset::populate (const char *desc)
1767 {
1768 clear ();
1769
1770 fontdesc = strdup (desc);
1771
1772 push_font (new_font (0, CS_UNICODE));
1773 realize_font (0);
1774
1775 add_fonts (desc);
1776
1777 return true;
1778 }
1779
1780 int
find_font(const char * name)1781 rxvt_fontset::find_font (const char *name) const
1782 {
1783 for (rxvt_font *const *f = fonts.begin (); f < fonts.end (); f++)
1784 if ((*f)->name && !strcmp ((*f)->name, name))
1785 return f - fonts.begin ();
1786
1787 return -1;
1788 }
1789
1790 int
find_font_idx(unicode_t unicode)1791 rxvt_fontset::find_font_idx (unicode_t unicode)
1792 {
1793 // this limits fmap size. it has to accommodate COMPOSE_HI when UNICODE_3
1794 if (unicode > 0x1fffff)
1795 return 0;
1796
1797 unicode_t hi = unicode >> 8;
1798
1799 if (hi < fmap.size ())
1800 if (pagemap *pm = fmap[hi])
1801 if ((*pm)[unicode & 0xff] != 0xff)
1802 return (*pm)[unicode & 0xff];
1803
1804 unsigned int i;
1805
1806 for (i = 0; i < fonts.size (); i++)
1807 {
1808 rxvt_font *f = fonts[i];
1809
1810 if (!f->loaded)
1811 {
1812 if (FROM_UNICODE (f->cs, unicode) == NOCHAR)
1813 goto next_font;
1814
1815 if (!realize_font (i))
1816 goto next_font;
1817
1818 if (prop.ascent != rxvt_fontprop::unset)
1819 max_it (f->ascent, prop.ascent);
1820 }
1821
1822 if (f->cs == CS_UNKNOWN)
1823 goto next_font;
1824
1825 bool careful;
1826 if (f->has_char (unicode, &prop, careful))
1827 {
1828 i = (i << 1) | careful;
1829
1830 goto found;
1831 }
1832
1833 next_font:
1834 if (i == fonts.size () - 1)
1835 {
1836 // compose characters are handled by the default font, unless another font takes over
1837 // we do not go via the fallback list for speed reasons.
1838 if (IS_COMPOSE (unicode))
1839 return 0;
1840
1841 if (fallback->name)
1842 {
1843 // search through the fallback list
1844 push_font (new_font (fallback->name, fallback->cs));
1845 fallback++;
1846 }
1847 else
1848 {
1849 // try to find a new font.
1850 // only xft currently supported, as there is no
1851 // way to configure this and xft is easier to hack in,
1852 // while x11 has more framework in place already.
1853 // TODO: this is a real resource hog, xft takes ages(?)
1854 #if XFT && USE_SLOW_LOOKUP
1855 // grab the first xft font that seems suitable
1856 // TOOD: should go first for cellchar (spacing 110) then mono, then else
1857 FcPattern *p = FcPatternCreate ();
1858
1859 FcCharSet *s = FcCharSetCreate ();
1860 FcCharSetAddChar (s, unicode);
1861 FcPatternAddCharSet (p, FC_CHARSET, s);
1862 // charsets don't help that much, as xft might return
1863 // a non-matching font even if a better font is available :/
1864
1865 x x x x TODO prop might have unset contents
1866 FcPatternAddInteger (p, FC_PIXEL_SIZE, prop.height);
1867 FcPatternAddInteger (p, FC_WEIGHT, prop.weight);
1868 FcPatternAddInteger (p, FC_SLANT, prop.slant);
1869 FcPatternAddBool (p, FC_MINSPACE, 1);
1870 //FcPatternAddBool (p, FC_ANTIALIAS, 1);
1871
1872 XftResult result;
1873 FcPattern *match = XftFontMatch (term->dpy, term->display->screen, p, &result);
1874
1875 FcPatternDestroy (p);
1876
1877 if (match)
1878 {
1879 FcPatternDel (match, FC_CHARSET);
1880 char *font = (char *)FcNameUnparse (match);
1881 FcPatternDestroy (match);
1882
1883 if (find_font (font) < 0)
1884 {
1885 char fontname[4096];
1886 snprintf (fontname, sizeof (fontname), "xft:%s", font);
1887
1888 push_font (new_font (fontname, CS_UNICODE));
1889 }
1890
1891 free (font);
1892 }
1893 #endif
1894 }
1895 }
1896 }
1897
1898 /* we must return SOME font */
1899 i = 0;
1900
1901 found:
1902 // found a font, cache it
1903 if (i < 255)
1904 {
1905 while (hi >= fmap.size ())
1906 fmap.push_back (0);
1907
1908 if (!fmap[hi])
1909 {
1910 fmap[hi] = new pagemap;
1911 memset (fmap[hi], 0xff, sizeof (pagemap));
1912 }
1913
1914 (*fmap[hi])[unicode & 0xff] = i;
1915 }
1916
1917 return i;
1918 }
1919
1920