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Revision: 1.224
Committed: Thu Jan 4 19:52:37 2024 UTC (4 months, 1 week ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: HEAD
Changes since 1.223: +6 -5 lines
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# Content
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 uint32_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 0x1f600, // 😀
162 };
163
164 #define dTermDisplay Display *disp = term->dpy
165 #define dTermGC GC gc = term->gc
166
167 /////////////////////////////////////////////////////////////////////////////
168
169 static const char *
170 enc_char (const text_t *text, uint32_t len, codeset cs, bool &zero)
171 {
172 uint8_t *buf = rxvt_temp_buf<uint8_t> (len);
173 uint8_t *res = buf;
174
175 while (len--)
176 {
177 uint32_t c = FROM_UNICODE (cs, *text++);
178
179 if (c == NOCHAR)
180 {
181 c = 0;
182 zero = true;
183 }
184
185 *buf++ = c;
186 }
187
188 return (const char *)res;
189 }
190
191 static const XChar2b *
192 enc_xchar2b (const text_t *text, uint32_t len, codeset cs, bool &zero)
193 {
194 XChar2b *buf = rxvt_temp_buf<XChar2b> (len);
195 XChar2b *res = buf;
196
197 while (len--)
198 {
199 uint32_t c = FROM_UNICODE (cs, *text++);
200
201 if (c == NOCHAR)
202 {
203 c = 0;
204 zero = true;
205 }
206
207 buf->byte1 = c >> 8;
208 buf->byte2 = c;
209 buf++;
210 }
211
212 return res;
213 }
214
215 /////////////////////////////////////////////////////////////////////////////
216
217 rxvt_font::rxvt_font ()
218 : name(0), width(rxvt_fontprop::unset), height(rxvt_fontprop::unset)
219 {
220 }
221
222 void
223 rxvt_font::set_name (char *name_)
224 {
225 if (name == name_)
226 return;
227
228 if (name) free (name); // let the compiler optimize
229 name = name_;
230 }
231
232 void
233 rxvt_font::clear_rect (rxvt_drawable &d, int x, int y, int w, int h, int color) const
234 {
235 dTermDisplay;
236 dTermGC;
237
238 if (color == Color_bg || color == Color_transparent)
239 XClearArea (disp, d, x, y, w, h, false);
240 else if (color >= 0)
241 {
242 #if XFT
243 Picture dst;
244
245 # ifdef HAVE_IMG
246 if (term->bg_img
247 && !term->pix_colors[color].is_opaque ()
248 && ((dst = XftDrawPicture (d))))
249 {
250 XClearArea (disp, d, x, y, w, h, false);
251
252 Picture solid_color_pict = XftDrawSrcPicture (d, &term->pix_colors[color].c);
253 XRenderComposite (disp, PictOpOver, solid_color_pict, None, dst, 0, 0, 0, 0, x, y, w, h);
254 }
255 else
256 # endif
257 XftDrawRect (d, &term->pix_colors[color].c, x, y, w, h);
258
259 #else
260 XSetForeground (disp, gc, term->pix_colors[color]);
261 XFillRectangle (disp, d, gc, x, y, w, h);
262 #endif
263 }
264 }
265
266 /////////////////////////////////////////////////////////////////////////////
267
268 struct rxvt_font_default : rxvt_font
269 {
270 struct rxvt_fontset *fs;
271
272 rxvt_font_default (rxvt_fontset *fs)
273 : rxvt_font ()
274 {
275 this->fs = fs;
276 }
277
278 rxvt_fontprop properties ()
279 {
280 rxvt_fontprop p;
281
282 p.width = p.height = 1;
283 p.ascent = rxvt_fontprop::unset;
284 p.weight = rxvt_fontprop::medium;
285 p.slant = rxvt_fontprop::roman;
286
287 return p;
288 }
289
290 bool load (const rxvt_fontprop &prop, bool force_prop)
291 {
292 width = 1; height = 1;
293 ascent = 1; descent = 0;
294
295 set_name (strdup ("built-in support font"));
296
297 return true;
298 }
299
300 bool has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
301 {
302 careful = false;
303
304 if (unicode <= 0x001f)
305 return true;
306
307 if (unicode <= 0x007f)
308 return false;
309
310 if (unicode <= 0x009f)
311 return true;
312
313 #ifdef BUILTIN_GLYPHS
314 if (unicode >= 0x2500 && unicode <= 0x259f &&
315 !term->option (Opt_skipBuiltinGlyphs))
316 return true;
317 #endif
318
319 // we do not check for IS_COMPOSE here, as this would
320 // rob other fonts from taking over.
321
322 switch (unicode)
323 {
324 case ZERO_WIDTH_CHAR:
325 case NOCHAR:
326 return true;
327 }
328
329 return false;
330 }
331
332 void draw (rxvt_drawable &d, int x, int y,
333 const text_t *text, int len,
334 int fg, int bg);
335 };
336
337 void
338 rxvt_font_default::draw (rxvt_drawable &d, int x, int y,
339 const text_t *text, int len,
340 int fg, int bg)
341 {
342 dTermDisplay;
343 dTermGC;
344
345 clear_rect (d, x, y, term->fwidth * len, term->fheight, bg);
346
347 XSetForeground (disp, gc, term->pix_colors[fg]);
348
349 while (len)
350 {
351 const text_t *tp = text;
352 text_t t = *tp;
353
354 while (++text, --len && *text == NOCHAR)
355 ;
356
357 #if ENABLE_COMBINING
358 compose_char *cc;
359 #endif
360 int width = text - tp;
361 int fwidth = term->fwidth * width;
362
363 #ifdef BUILTIN_GLYPHS
364 if (0x2500 <= t && t <= 0x259f)
365 {
366 # include "table/linedraw.h"
367 uint16_t offs = linedraw_offs[t - 0x2500];
368 uint32_t *a = linedraw_command + (offs >> 4);
369 uint32_t *b = a + (offs & 15);
370
371 int W = fwidth;
372 int H = term->fheight;
373
374 int x_[16];
375 int y_[16];
376
377 for (int i = 0; i <= 8; i++)
378 {
379 x_[i] = x + ((W-1) * i + (i*7/8)) / 8;
380 y_[i] = y + ((H-1) * i + (i*7/8)) / 8;
381 }
382
383 x_[10] = x + (W - 1) / 2; x_[9] = x_[10] - 1; x_[11] = x_[10] + 1;
384 y_[10] = y + (H - 1) / 2; y_[9] = y_[10] - 1; y_[11] = y_[10] + 1;
385
386 XGCValues gcv;
387
388 gcv.cap_style = CapButt;
389 gcv.line_width = 0;
390 XChangeGC (disp, gc, GCLineWidth | GCCapStyle, &gcv);
391
392 while (a < b)
393 {
394 uint32_t command = *a++;
395
396 int op = (command >> 24) & 255;
397 int a = (command >> 20) & 15;
398 int b = (command >> 16) & 15;
399 int x1 = x_[(command >> 12) & 15];
400 int y1 = y_[(command >> 8) & 15];
401 int x2 = x_[(command >> 4) & 15];
402 int y2 = y_[(command >> 0) & 15];
403
404 switch (op)
405 {
406 case 0: // line
407 XDrawLine (disp, d, gc, x1, y1, x2, y2);
408 break;
409
410 case 1: // rectangle, possibly stippled
411 if (a)
412 {
413 static char bm[] = { 0,0 , 3,1 , 1,2 , 1,0 };
414
415 gcv.fill_style = FillStippled;
416 gcv.stipple = XCreateBitmapFromData (disp, d, bm + a * 2, 2, 2);
417 gcv.ts_x_origin = x;
418 gcv.ts_y_origin = y;
419
420 XChangeGC (disp, gc,
421 GCFillStyle | GCStipple | GCTileStipXOrigin | GCTileStipYOrigin,
422 &gcv);
423 }
424
425 XFillRectangle (disp, d, gc, x1, y1, x2 - x1 + 1, y2 - y1 + 1);
426
427 if (a)
428 {
429 XFreePixmap (disp, gcv.stipple);
430 gcv.stipple = 0;
431 gcv.fill_style = FillSolid;
432 XChangeGC (disp, gc, GCFillStyle, &gcv);
433 }
434 break;
435 case 2: // arc
436 XDrawArc (disp, d, gc,
437 x1 - W/2, y1 - H/2, W-1, H-1,
438 (a - 1) * 90*64, (b - 1) * 90*64);
439 break;
440 }
441 }
442 }
443 #else
444 if (0)
445 ;
446 #endif
447 #if ENABLE_COMBINING
448 else if (IS_COMPOSE (t) && (cc = rxvt_composite[t]))
449 {
450 min_it (width, 2); // we only support wcwidth up to 2
451 text_t chrs[2];
452 chrs [1] = NOCHAR;
453
454 *chrs = cc->c1;
455 rxvt_font *f1 = (*fs)[fs->find_font_idx (cc->c1)];
456 f1->draw (d, x, y, chrs, width, fg, bg);
457
458 if (cc->c2 != NOCHAR)
459 {
460 bool careful;
461
462 // prefer font of first character, for no good reasons
463 *chrs = cc->c2;
464 rxvt_font *f2 = (f1->has_char (cc->c2, 0, careful) && !careful)
465 ? f1
466 : (*fs)[fs->find_font_idx (cc->c2)];
467
468 f2->draw (d, x, y, chrs, width, fg, Color_none);
469 }
470 }
471 #endif
472 else
473 switch (t)
474 {
475 case '\t':
476 case ZERO_WIDTH_CHAR:
477 case NOCHAR:
478 break;
479
480 /*
481 * If the base font does not support variation selectors, treat them as ZWC.
482 * a point could be made to do this for all wcwidth == 0 characters, but I
483 * decided against that until more data is available.
484 */
485 case 0xfe00: case 0xfe01: case 0xfe02: case 0xfe03: case 0xfe04: case 0xfe05: case 0xfe06: case 0xfe07:
486 case 0xfe08: case 0xfe09: case 0xfe0a: case 0xfe0b: case 0xfe0c: case 0xfe0d: case 0xfe0e: case 0xfe0f:
487 break;
488
489 default:
490 XDrawRectangle (disp, d, gc, x + 2, y + 2,
491 fwidth - 4, term->fheight - 4);
492 }
493
494 x += fwidth;
495 }
496 }
497
498 struct rxvt_font_overflow : rxvt_font
499 {
500 struct rxvt_fontset *fs;
501
502 rxvt_font_overflow (rxvt_fontset *fs)
503 : rxvt_font ()
504 {
505 this->fs = fs;
506 }
507
508 rxvt_fontprop properties ()
509 {
510 rxvt_fontprop p;
511
512 p.width = p.height = 1;
513 p.ascent = rxvt_fontprop::unset;
514 p.weight = rxvt_fontprop::medium;
515 p.slant = rxvt_fontprop::roman;
516
517 return p;
518 }
519
520 bool load (const rxvt_fontprop &prop, bool force_prop)
521 {
522 width = 1; height = 1;
523 ascent = 1;
524 descent = (*fs)[2]->descent;
525
526 set_name (strdup ("built-in rendition overflow font"));
527
528 return true;
529 }
530
531 bool has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
532 {
533 return false;
534 }
535
536 void draw (rxvt_drawable &d, int x, int y,
537 const text_t *text, int len,
538 int fg, int bg)
539 {
540 while (len)
541 {
542 int fid = fs->find_font_idx (*text);
543 int w = 1;
544 while (w < len && text[w] == NOCHAR)
545 w++;
546 (*fs)[fid]->draw (d, x, y, text, w, fg, bg);
547 text += w;
548 len -= w;
549 x += term->fwidth * w;
550 }
551 }
552 };
553
554 /////////////////////////////////////////////////////////////////////////////
555
556 struct rxvt_font_x11 : rxvt_font
557 {
558 rxvt_font_x11 () { f = 0; }
559
560 void clear ();
561
562 rxvt_fontprop properties ();
563
564 bool load (const rxvt_fontprop &prop, bool force_prop);
565
566 bool has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const;
567
568 void draw (rxvt_drawable &d, int x, int y,
569 const text_t *text, int len,
570 int fg, int bg);
571
572 bool slow; // whether this is a proportional font or has other funny characteristics
573 XFontStruct *f;
574 bool enc2b, encm;
575
576 char *get_property (XFontStruct *f, Atom property, const char *repl) const;
577 bool set_properties (rxvt_fontprop &p, int height, const char *weight, const char *slant, int avgwidth);
578 bool set_properties (rxvt_fontprop &p, XFontStruct *f);
579 bool set_properties (rxvt_fontprop &p, const char *name);
580 };
581
582 char *
583 rxvt_font_x11::get_property (XFontStruct *f, Atom property, const char *repl) const
584 {
585 unsigned long value;
586
587 if (XGetFontProperty (f, property, &value))
588 return XGetAtomName (term->dpy, value);
589 else
590 return repl ? strdup (repl) : 0;
591 }
592
593 rxvt_fontprop
594 rxvt_font_x11::properties ()
595 {
596 rxvt_fontprop p;
597 set_properties (p, f);
598 return p;
599 }
600
601 bool
602 rxvt_font_x11::set_properties (rxvt_fontprop &p, int height, const char *weight, const char *slant, int avgwidth)
603 {
604 p.width = width != rxvt_fontprop::unset ? width
605 : avgwidth ? (avgwidth + 1) / 10
606 : (height + 1) / 2;
607 p.height = height;
608 p.ascent = rxvt_fontprop::unset;
609 p.weight = *weight == 'B' || *weight == 'b' ? rxvt_fontprop::bold : rxvt_fontprop::medium;
610 p.slant = *slant == 'r' || *slant == 'R' ? rxvt_fontprop::roman : rxvt_fontprop::italic;
611
612 return true;
613 }
614
615 bool
616 rxvt_font_x11::set_properties (rxvt_fontprop &p, XFontStruct *f)
617 {
618 unsigned long height;
619
620 #if 0
621 if (!XGetFontProperty (f, XInternAtom (term->dpy, "PIXEL_SIZE", 0), &height))
622 return false;
623 #else
624 height = f->ascent + f->descent;
625 #endif
626
627 unsigned long avgwidth;
628 if (!XGetFontProperty (f, term->xa [XA_AVERAGE_WIDTH], &avgwidth))
629 avgwidth = 0;
630
631 char *weight = get_property (f, term->xa [XA_WEIGHT_NAME], "medium");
632 char *slant = get_property (f, term->xa [XA_SLANT], "r");
633
634 set_properties (p, height, weight, slant, avgwidth);
635
636 free (weight);
637 free (slant);
638
639 p.ascent = f->ascent;
640
641 return true;
642 }
643
644 bool
645 rxvt_font_x11::set_properties (rxvt_fontprop &p, const char *name)
646 {
647 dTermDisplay;
648 int slashes = 0;
649 const char *comp[13];
650
651 for (const char *c = name; *c; c++)
652 if (*c == '-')
653 {
654 comp[slashes++] = c + 1;
655 if (slashes >= 13)
656 break;
657 }
658
659 /* can we short-circuit the costly XLoadQueryFont? */
660 if (slashes >= 13
661 && (*comp[ 6] >= '1' && *comp[ 6] <= '9')
662 && (*comp[11] >= '0' && *comp[11] <= '9'))
663 return set_properties (p, atoi (comp[6]), comp[2], comp[3], atoi (comp[11]));
664
665 XFontStruct *f = XLoadQueryFont (disp, name);
666
667 if (f)
668 {
669 // the font should really exist now. if not, we have a problem
670 // (e.g. if the user did xset fp rehash just when we were searching fonts).
671 // in that case, just return garbage.
672 bool ret = set_properties (p, f);
673 XFreeFont (disp, f);
674 return ret;
675 }
676 else
677 return false;
678 }
679
680 // fix the size of scalable fonts
681 static bool
682 replace_field (char **ptr, const char *name, int index, const char old, const char *replace)
683 {
684 int slashes = 0;
685 const char *field, *end;
686
687 for (const char *c = name; *c; c++)
688 if (*c == '-')
689 {
690 if (slashes == index)
691 field = c + 1;
692
693 if (slashes == index + 1)
694 end = c;
695
696 if (++slashes >= 13)
697 break;
698 }
699
700 if (slashes >= 13 && (!old || *field == old))
701 {
702 size_t len = field - name;
703 *ptr = (char *)malloc (len + strlen (replace) + strlen (end) + 1);
704 memcpy (*ptr, name, len);
705 strcpy (*ptr + len, replace);
706 strcat (*ptr, end);
707
708 return true;
709 }
710 else
711 {
712 *ptr = strdup (name);
713
714 return false;
715 }
716 }
717
718 bool
719 rxvt_font_x11::load (const rxvt_fontprop &prop, bool force_prop)
720 {
721 dTermDisplay;
722
723 clear ();
724
725 char field_str[64]; // enough for 128 bits
726
727 // first morph the font if required
728 if (force_prop)
729 {
730 char *fname;
731
732 if (name[0] != '-')
733 {
734 f = XLoadQueryFont (disp, name);
735
736 if (!f)
737 return false;
738
739 char *new_name = get_property (f, XA_FONT, 0);
740
741 if (new_name)
742 set_name (new_name);
743 else
744 rxvt_warn ("font '%s' has no FONT property, continuing without.\n", name);
745
746 XFreeFont (disp, f);
747 f = 0;
748 }
749
750 if (prop.weight != rxvt_fontprop::unset)
751 {
752 replace_field (&fname, name, 2, 0,
753 prop.weight < rxvt_fontprop::bold
754 ? "medium" : "bold");
755 set_name (fname);
756 }
757
758 if (prop.slant != rxvt_fontprop::unset)
759 {
760 replace_field (&fname, name, 3, 0,
761 prop.slant < rxvt_fontprop::italic
762 ? "r" : "i"); // TODO: handle "o"blique, too
763 set_name (fname);
764 }
765 }
766
767 sprintf (field_str, "%d", prop.height == rxvt_fontprop::unset
768 ? 0 : prop.height);
769
770 struct font_weight {
771 char *name;
772 int diff;
773
774 void clear ()
775 {
776 name = 0;
777 diff = 0x7fffffff;
778 }
779
780 font_weight () { clear (); }
781 ~font_weight () { free (name); }
782 };
783
784 char **list;
785 int count;
786 list = XListFonts (disp, name, 4000, &count);
787
788 set_name (0);
789
790 if (!list)
791 return false;
792
793 font_weight *fonts = new font_weight[count];
794
795 for (int i = 0; i < count; i++)
796 {
797 rxvt_fontprop p;
798 char *fname;
799
800 int diff = 0;
801
802 if (replace_field (&fname, list[i], 6, '0', field_str))
803 diff += 10; // slightly penalize scalable fonts
804 else
805 {
806 free (fname);
807 if (replace_field (&fname, list[i], 11, '0', "0"))
808 diff += 300; // more heavily penalize what looks like scaled bitmap fonts
809 }
810
811 if (!set_properties (p, fname)
812 // also weed out too large fonts
813 || (prop.height != rxvt_fontprop::unset
814 && p.height > prop.height))
815 {
816 free (fname);
817 continue;
818 }
819
820 if (prop.height != rxvt_fontprop::unset) diff += (prop.height - p.height) * 128;
821 if (prop.weight != rxvt_fontprop::unset) diff += abs (prop.weight - p.weight);
822 if (prop.slant != rxvt_fontprop::unset) diff += abs (prop.slant - p.slant);
823 //if (prop.width != rxvt_fontprop::unset) diff += abs (prop.width - p.width);
824
825 fonts[i].name = fname;
826 fonts[i].diff = diff;
827 }
828
829 XFreeFontNames (list);
830
831 // this loop only iterates when the guessed font-size is too small
832 for (;;)
833 {
834 font_weight *best = fonts;
835
836 for (font_weight *w = fonts + 1; w < fonts + count; w++)
837 if (w->diff < best->diff)
838 best = w;
839
840 if (!best->name
841 || !(f = XLoadQueryFont (disp, best->name)))
842 break;
843
844 set_name (best->name);
845 best->clear ();
846
847 ascent = f->ascent;
848 descent = f->descent;
849 height = ascent + descent;
850
851 if (prop.height == rxvt_fontprop::unset
852 || height <= prop.height)
853 break; // font is ready for use
854
855 // PIXEL_SIZE small enough, but real height too large
856 clear ();
857 }
858
859 delete [] fonts;
860
861 if (!f)
862 return false;
863
864 char *registry = get_property (f, term->xa [XA_CHARSET_REGISTRY], 0);
865 char *encoding = get_property (f, term->xa [XA_CHARSET_ENCODING], 0);
866
867 cs = CS_UNKNOWN;
868
869 if (registry && encoding)
870 {
871 char charset[64];
872 snprintf (charset, 64, "%s-%s", registry, encoding);
873
874 cs = codeset_from_name (charset);
875
876 if (cs == CS_UNKNOWN)
877 rxvt_warn ("%s: cannot deduce encoding from registry/encoding properties \"%s\", ignoring font.\n", name, charset);
878 }
879
880 free (registry);
881 free (encoding);
882
883 if (cs == CS_UNKNOWN)
884 {
885 char *value = get_property (f, XA_FONT, 0);
886 const char *charset = value;
887
888 if (!charset)
889 charset = name;
890
891 int count = 13;
892 while (*charset)
893 if (*charset++ == '-' && !--count)
894 break;
895
896 cs = codeset_from_name (charset);
897 if (cs == CS_UNKNOWN)
898 rxvt_warn ("%s: cannot deduce encoding from font name property \"%s\", ignoring font.\n", name, charset);
899
900 free (value);
901 }
902
903 if (cs == CS_UNKNOWN)
904 {
905 clear ();
906 return false;
907 }
908
909 if (cs == CS_UNICODE)
910 cs = CS_UNICODE_16; // X11 can have a max. of 65536 chars per font
911
912 encm = f->min_byte1 != 0 || f->max_byte1 != 0;
913 enc2b = encm || f->max_char_or_byte2 > 255;
914
915 slow = false;
916
917 #if 1 // only used for slow detection, TODO optimize
918 if (f->min_bounds.width == f->max_bounds.width || !f->per_char)
919 width = f->max_bounds.width;
920 else
921 {
922 slow = true;
923
924 int N = f->max_char_or_byte2 - f->min_char_or_byte2;
925
926 if (encm)
927 N += (f->max_byte1 - f->min_byte1)
928 * (f->max_char_or_byte2 - f->min_char_or_byte2 + 1);
929
930 while (N)
931 {
932 if (f->per_char[N].width > width)
933 width = f->per_char[N].width;
934
935 --N;
936 }
937 }
938 #endif
939
940 width = 1;
941
942 for (uint32_t *t = extent_test_chars; t < extent_test_chars + ecb_array_length (extent_test_chars); t++)
943 {
944 if (FROM_UNICODE (cs, *t) == NOCHAR)
945 continue;
946
947 // ignore characters we wouldn't use anyways
948 bool careful;
949 if (!has_char (*t, &prop, careful))
950 continue;
951
952 // the casts are needed in C++11 (see 8.5.1)
953 XChar2b ch = { (unsigned char)(*t >> 8), (unsigned char)*t };
954
955 XCharStruct g;
956 int dir_ret, asc_ret, des_ret;
957 XTextExtents16 (f, &ch, 1, &dir_ret, &asc_ret, &des_ret, &g);
958
959 int wcw = WCWIDTH (*t);
960 if (wcw > 0) g.width = (g.width + wcw - 1) / wcw;
961
962 if (width < g.width) width = g.width;
963 }
964
965 #if 0 // do it per-character
966 if (prop && width > prop->width)
967 {
968 clear ();
969 return false;
970 }
971 #endif
972
973 return true;
974 }
975
976 void
977 rxvt_font_x11::clear ()
978 {
979 if (f)
980 {
981 XFreeFont (term->dpy, f);
982 f = 0;
983 }
984 }
985
986 bool
987 rxvt_font_x11::has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
988 {
989 careful = false;
990
991 uint32_t ch = FROM_UNICODE (cs, unicode);
992
993 if (ch == NOCHAR)
994 return false;
995
996 /* check whether the character exists in _this_ font. horrible. */
997 XCharStruct *xcs;
998
999 if (encm)
1000 {
1001 unsigned char byte1 = ch >> 8;
1002 unsigned char byte2 = ch & 255;
1003
1004 if (byte1 < f->min_byte1 || byte1 > f->max_byte1
1005 || byte2 < f->min_char_or_byte2 || byte2 > f->max_char_or_byte2)
1006 return false;
1007
1008 if (f->per_char)
1009 {
1010 int D = f->max_char_or_byte2 - f->min_char_or_byte2 + 1;
1011 int N = (byte1 - f->min_byte1) * D + byte2 - f->min_char_or_byte2;
1012
1013 xcs = f->per_char + N;
1014 }
1015 else
1016 xcs = &f->max_bounds;
1017 }
1018 else
1019 {
1020 if (ch < f->min_char_or_byte2 || ch > f->max_char_or_byte2)
1021 return false;
1022
1023 if (f->per_char)
1024 xcs = f->per_char + (ch - f->min_char_or_byte2);
1025 else
1026 xcs = &f->max_bounds;
1027 }
1028
1029 if (xcs->lbearing == 0 && xcs->rbearing == 0 && xcs->width == 0
1030 && xcs->ascent == 0 && xcs->descent == 0)
1031 return false;
1032
1033 if (!prop || prop->width == rxvt_fontprop::unset)
1034 return true;
1035
1036 // check whether character overlaps previous/next character
1037 int w = xcs->rbearing - xcs->lbearing;
1038 int wcw = max (WCWIDTH (unicode), 1);
1039
1040 careful = xcs->lbearing < 0 || xcs->rbearing > prop->width * wcw;
1041
1042 if (careful && !OVERLAP_OK (w, wcw, prop))
1043 return false;
1044
1045 return true;
1046 }
1047
1048 void
1049 rxvt_font_x11::draw (rxvt_drawable &d, int x, int y,
1050 const text_t *text, int len,
1051 int fg, int bg)
1052 {
1053 // this looks like a mess /.
1054 // and it is a mess /.
1055 // yet we are trying to be perfect /.
1056 // but the result still isn't perfect /.
1057
1058 dTermDisplay;
1059 dTermGC;
1060
1061 bool slow = this->slow
1062 || width != term->fwidth
1063 || height != term->fheight
1064 || ascent != f->ascent;
1065
1066 int base = ascent; // sorry, incorrect: term->fbase;
1067
1068 XGCValues v;
1069 v.foreground = term->pix_colors[fg];
1070 v.font = f->fid;
1071
1072 if (enc2b)
1073 {
1074 const XChar2b *xc = enc_xchar2b (text, len, cs, slow);
1075
1076 if (bg == Color_bg && !slow)
1077 {
1078 v.background = term->pix_colors[bg];
1079 XChangeGC (disp, gc, GCForeground | GCBackground | GCFont, &v);
1080 XDrawImageString16 (disp, d, gc, x, y + base, xc, len);
1081 }
1082 else
1083 {
1084 clear_rect (d, x, y, term->fwidth * len, term->fheight, bg);
1085
1086 XChangeGC (disp, gc, GCForeground | GCFont, &v);
1087
1088 if (slow)
1089 {
1090 do
1091 {
1092 if (xc->byte1 || xc->byte2)
1093 XDrawString16 (disp, d, gc, x, y + base, xc, 1);
1094
1095 x += term->fwidth;
1096 xc++; len--;
1097 }
1098 while (len);
1099 }
1100 else
1101 XDrawString16 (disp, d, gc, x, y + base, xc, len);
1102 }
1103 }
1104 else
1105 {
1106 const char *xc = enc_char (text, len, cs, slow);
1107
1108 if (bg == Color_bg && !slow)
1109 {
1110 v.background = term->pix_colors[bg];
1111 XChangeGC (disp, gc, GCForeground | GCBackground | GCFont, &v);
1112 XDrawImageString (disp, d, gc, x, y + base, xc, len);
1113 }
1114 else
1115 {
1116 clear_rect (d, x, y, term->fwidth * len, term->fheight, bg);
1117
1118 XChangeGC (disp, gc, GCForeground | GCFont, &v);
1119
1120 if (slow)
1121 {
1122 do
1123 {
1124 if (*xc)
1125 XDrawString (disp, d, gc, x, y + base, xc, 1);
1126
1127 x += term->fwidth;
1128 xc++; len--;
1129 }
1130 while (len);
1131 }
1132 else
1133 XDrawString (disp, d, gc, x, y + base, xc, len);
1134 }
1135 }
1136 }
1137
1138 /////////////////////////////////////////////////////////////////////////////
1139
1140 #if XFT
1141
1142 struct rxvt_font_xft : rxvt_font
1143 {
1144 #if XFT_CHAR_CACHE
1145 // we cache the qascii range xoffsets in the name of speed,
1146 // expecting terminals to deal mostly with these characters
1147 // we also assume the xoff always fits into uint8_t,
1148 // which is questionable, but let's see...
1149 // also, it is uncomfortably big, due to the uints.
1150 enum { char_cache_min = 0x20, char_cache_max = 0x7e };
1151 uint8_t xoff_cache [char_cache_max - char_cache_min + 1];
1152 FT_UInt glyph_cache [char_cache_max - char_cache_min + 1];
1153 #endif
1154
1155 rxvt_font_xft ()
1156 {
1157 f = 0;
1158 }
1159
1160 void clear ();
1161
1162 rxvt_fontprop properties ();
1163
1164 bool load (const rxvt_fontprop &prop, bool force_prop);
1165
1166 void draw (rxvt_drawable &d, int x, int y,
1167 const text_t *text, int len,
1168 int fg, int bg);
1169
1170 bool has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const;
1171
1172 protected:
1173 XftFont *f;
1174 };
1175
1176 void
1177 rxvt_font_xft::clear ()
1178 {
1179 if (f)
1180 {
1181 XftFontClose (term->dpy, f);
1182 f = 0;
1183 }
1184 }
1185
1186 rxvt_fontprop
1187 rxvt_font_xft::properties ()
1188 {
1189 rxvt_fontprop p;
1190
1191 FT_Face face = XftLockFace (f);
1192
1193 p.width = width;
1194 p.height = height;
1195 p.ascent = ascent;
1196 p.weight = face->style_flags & FT_STYLE_FLAG_BOLD
1197 ? rxvt_fontprop::bold : rxvt_fontprop::medium;
1198 p.slant = face->style_flags & FT_STYLE_FLAG_ITALIC
1199 ? rxvt_fontprop::italic : rxvt_fontprop::roman;
1200
1201 XftUnlockFace (f);
1202
1203 return p;
1204 }
1205
1206 bool
1207 rxvt_font_xft::load (const rxvt_fontprop &prop, bool force_prop)
1208 {
1209 dTermDisplay;
1210
1211 clear ();
1212
1213 FcPattern *p = FcNameParse ((FcChar8 *) name);
1214
1215 if (!p)
1216 return false;
1217
1218 FcValue v;
1219
1220 if (prop.height != rxvt_fontprop::unset
1221 && (FcPatternGet (p, FC_PIXEL_SIZE, 0, &v) != FcResultMatch
1222 && FcPatternGet (p, FC_SIZE, 0, &v) != FcResultMatch))
1223 FcPatternAddInteger (p, FC_PIXEL_SIZE, prop.height);
1224
1225 if (prop.weight != rxvt_fontprop::unset
1226 && (force_prop || FcPatternGet (p, FC_WEIGHT, 0, &v) != FcResultMatch))
1227 FcPatternAddInteger (p, FC_WEIGHT, prop.weight);
1228
1229 if (prop.slant != rxvt_fontprop::unset
1230 && (force_prop || FcPatternGet (p, FC_SLANT, 0, &v) != FcResultMatch))
1231 FcPatternAddInteger (p, FC_SLANT, prop.slant);
1232
1233 #if 0 // clipping unfortunately destroys our precious double-width-characters
1234 // clip width, we can't do better, or can we?
1235 if (FcPatternGet (p, FC_CHAR_WIDTH, 0, &v) != FcResultMatch)
1236 FcPatternAddInteger (p, FC_CHAR_WIDTH, prop.width);
1237 #endif
1238
1239 if (FcPatternGet (p, FC_MINSPACE, 0, &v) != FcResultMatch)
1240 FcPatternAddBool (p, FC_MINSPACE, 1);
1241
1242 // store generated name so iso14755 view gives better results
1243 set_name ((char *)FcNameUnparse (p));
1244
1245 XftResult result;
1246 FcPattern *match = XftFontMatch (disp, term->display->screen, p, &result);
1247
1248 FcPatternDestroy (p);
1249
1250 if (!match)
1251 return false;
1252
1253 int ftheight = 0;
1254 bool success = true;
1255
1256 for (;;)
1257 {
1258 p = FcPatternDuplicate (match);
1259 f = XftFontOpenPattern (disp, p);
1260
1261 if (!f)
1262 {
1263 FcPatternDestroy (p);
1264 success = false;
1265 break;
1266 }
1267
1268 FT_Face face = XftLockFace (f);
1269
1270 // fuck me plenty: XftLockFace can actually return 0. try not to crash.
1271 // we also assume blindly that if the first lock succeeds, then subsequent
1272 // locks will also succeed.
1273 if (!face)
1274 {
1275 XftFontClose (disp, f);
1276 success = false;
1277 break;
1278 }
1279
1280 ascent = (face->size->metrics.ascender + 63) >> 6;
1281 descent = (-face->size->metrics.descender + 63) >> 6;
1282 height = max (ascent + descent, (face->size->metrics.height + 63) >> 6);
1283 width = 0;
1284
1285 bool scalable = face->face_flags & FT_FACE_FLAG_SCALABLE;
1286
1287 XftUnlockFace (f);
1288
1289 int glheight = height;
1290
1291 for (uint32_t *t = extent_test_chars; t < extent_test_chars + ecb_array_length (extent_test_chars); t++)
1292 {
1293 FcChar32 ch = *t;
1294
1295 if (cs != CS_UNICODE
1296 && ch > 0x100
1297 && FROM_UNICODE (cs, ch) == NOCHAR)
1298 continue;
1299
1300 // ignore characters we wouldn't use anyways
1301 bool careful;
1302 if (!has_char (*t, &prop, careful))
1303 continue;
1304
1305 XGlyphInfo g;
1306 XftTextExtents32 (disp, f, &ch, 1, &g);
1307
1308 g.width -= g.x;
1309
1310 int wcw = WCWIDTH (ch);
1311 if (wcw > 0) g.width = (g.width + wcw - 1) / wcw;
1312
1313 if (width < g.width ) width = g.width;
1314 if (height < g.height ) height = g.height;
1315 if (glheight < g.height - g.y) glheight = g.height - g.y;
1316 }
1317
1318 if (!width)
1319 {
1320 rxvt_warn ("unable to calculate font width for '%s', using max_advance_width.\n", name);
1321 width = f->max_advance_width;
1322 break;
1323 }
1324
1325 if (prop.height == rxvt_fontprop::unset
1326 || (height <= prop.height && glheight <= prop.height)
1327 || height <= 2
1328 || !scalable)
1329 break;
1330
1331 if (ftheight)
1332 {
1333 // take smaller steps near the end
1334 if (height > prop.height + 1) ftheight++;
1335 if (height > prop.height + 2) ftheight++;
1336 if (height > prop.height + 3) ftheight++;
1337
1338 ftheight -= height - prop.height;
1339 }
1340 else
1341 ftheight = prop.height - 1;
1342
1343 XftFontClose (disp, f);
1344 FcPatternDel (match, FC_PIXEL_SIZE);
1345 FcPatternAddInteger (match, FC_PIXEL_SIZE, ftheight);
1346 }
1347
1348 FcPatternDestroy (match);
1349
1350 #if 0 // do it per-character
1351 if (prop.width != rxvt_fontprop::unset && width > prop.width)
1352 {
1353 clear ();
1354 success = false;
1355 }
1356 #endif
1357
1358 #if XFT_CHAR_CACHE
1359 // populate char cache
1360 for (FcChar16 ch = char_cache_min; ch <= char_cache_max; ++ch)
1361 {
1362 FT_UInt glyph = XftCharIndex (disp, f, ch);
1363 glyph_cache [ch - char_cache_min] = glyph;
1364
1365 XGlyphInfo g;
1366 XftGlyphExtents (disp, f, &glyph, 1, &g);
1367 xoff_cache [ch - char_cache_min] = g.xOff;
1368 }
1369 #endif
1370
1371 return success;
1372 }
1373
1374 bool
1375 rxvt_font_xft::has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
1376 {
1377 careful = false;
1378
1379 // handle non-bmp chars when text_t is 16 bit
1380 #if ENABLE_COMBINING && !UNICODE_3
1381 if (ecb_expect_false (IS_COMPOSE (unicode)))
1382 if (compose_char *cc = rxvt_composite [unicode])
1383 if (cc->c2 == NOCHAR)
1384 unicode = cc->c1;
1385 else
1386 return false;
1387 else
1388 return false;
1389 #endif
1390
1391 FcChar32 chr = unicode;
1392
1393 if (!XftCharExists (term->dpy, f, chr))
1394 return false;
1395
1396 if (!prop || prop->width == rxvt_fontprop::unset)
1397 return true;
1398
1399 int wcw = max (WCWIDTH (chr), 1);
1400
1401 XGlyphInfo g;
1402 XftTextExtents32 (term->dpy, f, &chr, 1, &g);
1403
1404 int cwidth = prop->width * wcw;
1405
1406 // use same adjustments as in ->draw, see there
1407 g.x += g.xOff ? cwidth - g.xOff >> 1 : 0;
1408 g.x += g.xOff ? 0 : cwidth;
1409
1410 int w = g.width - g.x;
1411
1412 careful = g.x > 0 || w > cwidth;
1413
1414 if (careful && !OVERLAP_OK (w, wcw, prop))
1415 return false;
1416
1417 // this weeds out _totally_ broken fonts, or glyphs
1418 if (!OVERLAP_OK (g.xOff, wcw, prop))
1419 return false;
1420
1421 return true;
1422 }
1423
1424 void
1425 rxvt_font_xft::draw (rxvt_drawable &d, int x, int y,
1426 const text_t *text, int len,
1427 int fg, int bg)
1428 {
1429 XftGlyphSpec *enc = rxvt_temp_buf<XftGlyphSpec> (len);
1430 XftGlyphSpec *ep = enc;
1431
1432 dTermDisplay;
1433 dTermGC;
1434
1435 int w = term->fwidth * len;
1436 int h = term->fheight;
1437
1438 bool buffered = bg >= Color_transparent
1439 && term->option (Opt_buffered);
1440
1441 // cut trailing spaces
1442 while (len && text [len - 1] == ' ')
1443 len--;
1444
1445 int x_ = buffered ? 0 : x;
1446 int y_ = buffered ? 0 : y;
1447
1448 while (len)
1449 {
1450 int cwidth = term->fwidth;
1451 FcChar32 chr = *text++; len--;
1452
1453 while (len && *text == NOCHAR)
1454 text++, len--, cwidth += term->fwidth;
1455
1456 if (chr != ' ') // skip spaces
1457 {
1458 // handle non-bmp chars when text_t is 16 bit
1459 #if ENABLE_COMBINING && !UNICODE_3
1460 if (ecb_expect_false (IS_COMPOSE (chr)))
1461 if (compose_char *cc = rxvt_composite [chr])
1462 if (cc->c2 == NOCHAR)
1463 chr = cc->c1;
1464 #endif
1465
1466 #if 0
1467 FT_UInt glyphs [decltype (exp)::max_size];
1468
1469 for (int i = 0; i < nchrs; ++i)
1470 glyphs [i] = XftCharIndex (disp, f, chrs [i]);
1471
1472 for (int i = 0; i < nchrs; ++i)
1473 {
1474 XGlyphInfo ep;
1475 XftGlyphExtents (disp, f, glyphs+i, 1, &ep);
1476 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);
1477 }
1478 #endif
1479
1480 FT_UInt glyph;
1481 int xOff;
1482
1483 #if XFT_CHAR_CACHE
1484 if (ecb_expect_true (IN_RANGE_INC (chr, char_cache_min, char_cache_max)))
1485 {
1486 glyph = glyph_cache [chr - char_cache_min];
1487 xOff = xoff_cache [chr - char_cache_min];
1488 }
1489 else
1490 #endif
1491 {
1492 glyph = XftCharIndex (disp, f, chr);
1493 XGlyphInfo extents;
1494 XftGlyphExtents (disp, f, &glyph, 1, &extents);
1495 xOff = extents.xOff;
1496 }
1497
1498 ep->glyph = glyph;
1499 ep->x = x_;
1500 ep->y = y_ + ascent;
1501
1502 // the xft font cell might differ from the terminal font cell,
1503 // in which case we use the average between the two.
1504 ep->x += xOff ? cwidth - xOff >> 1 : 0;
1505
1506 // xft/freetype represent combining characters as characters with zero
1507 // width rendered over the previous character with some fonts, while
1508 // in other fonts, they are considered normal characters, while yet
1509 // in other fonts, they are shifted all over the place.
1510 // we handle the first two cases by keying off on xOff being 0
1511 // for zero-width chars. normally, we would add extents.xOff
1512 // of the base character here, but we don't have that, so we use cwidth.
1513 ep->x += xOff ? 0 : cwidth;
1514
1515 ++ep;
1516 }
1517
1518 x_ += cwidth;
1519 }
1520
1521 if (buffered)
1522 {
1523 if (ep != enc)
1524 {
1525 rxvt_drawable &d2 = d.screen->scratch_drawable (w, h);
1526
1527 #ifdef HAVE_IMG
1528 Picture dst = 0; // the only assignment is done conditionally in the following if condition
1529
1530 if (term->bg_img
1531 && (bg == Color_transparent || bg == Color_bg
1532 || (bg >= 0 && !term->pix_colors[bg].is_opaque () && ((dst = XftDrawPicture (d2))))))
1533 {
1534 int src_x = x, src_y = y;
1535
1536 if (term->bg_flags & rxvt_term::BG_IS_TRANSPARENT)
1537 {
1538 src_x += term->window_vt_x;
1539 src_y += term->window_vt_y;
1540 }
1541
1542 if (term->bg_img->w >= src_x + w
1543 && term->bg_img->h >= src_y + h)
1544 {
1545 XCopyArea (disp, term->bg_img->pm, d2, gc,
1546 src_x, src_y, w, h, 0, 0);
1547 }
1548 else
1549 {
1550 XGCValues gcv;
1551
1552 gcv.fill_style = FillTiled;
1553 gcv.tile = term->bg_img->pm;
1554 gcv.ts_x_origin = -src_x;
1555 gcv.ts_y_origin = -src_y;
1556
1557 XChangeGC (disp, gc,
1558 GCTile | GCTileStipXOrigin | GCTileStipYOrigin | GCFillStyle,
1559 &gcv);
1560
1561 XFillRectangle (disp, d2, gc, 0, 0, w, h);
1562
1563 gcv.fill_style = FillSolid;
1564 XChangeGC (disp, gc, GCFillStyle, &gcv);
1565 }
1566
1567 if (dst)
1568 {
1569 Picture solid_color_pict = XftDrawSrcPicture (d2, &term->pix_colors[bg].c);
1570
1571 // dst can only be set when bg >= 0
1572 XRenderComposite (disp, PictOpOver, solid_color_pict, None, dst, 0, 0, 0, 0, 0, 0, w, h);
1573 }
1574 }
1575 else
1576 #endif
1577 XftDrawRect (d2, &term->pix_colors[bg >= 0 ? bg : Color_bg].c, 0, 0, w, h);
1578
1579 XftDrawGlyphSpec (d2, &term->pix_colors[fg].c, f, enc, ep - enc);
1580 XCopyArea (disp, d2, d, gc, 0, 0, w, h, x, y);
1581 }
1582 else
1583 clear_rect (d, x, y, w, h, bg);
1584 }
1585 else
1586 {
1587 clear_rect (d, x, y, w, h, bg);
1588 XftDrawGlyphSpec (d, &term->pix_colors[fg].c, f, enc, ep - enc);
1589 }
1590 }
1591
1592 #endif
1593
1594 /////////////////////////////////////////////////////////////////////////////
1595
1596 rxvt_fontset::rxvt_fontset (rxvt_term *term)
1597 : fontdesc (0), term (term)
1598 {
1599 clear ();
1600 }
1601
1602 rxvt_fontset::~rxvt_fontset ()
1603 {
1604 clear ();
1605 }
1606
1607 void
1608 rxvt_fontset::clear ()
1609 {
1610 prop.width = prop.height = prop.ascent = prop.weight = prop.slant
1611 = rxvt_fontprop::unset;
1612 force_prop = false;
1613
1614 for (rxvt_font **i = fonts.begin (); i != fonts.end (); i++)
1615 (*i)->unref ();
1616
1617 for (pagemap **p = fmap.begin (); p != fmap.end (); p++)
1618 delete *p;
1619
1620 free (fontdesc); fontdesc = 0;
1621
1622 fonts.clear ();
1623
1624 fallback = fallback_fonts;
1625 }
1626
1627 void
1628 rxvt_fontset::prepare_font (rxvt_font *font, codeset cs)
1629 {
1630 font->set_term (term);
1631
1632 font->cs = cs;
1633 font->loaded = false;
1634 }
1635
1636 rxvt_font *
1637 rxvt_fontset::new_font (const char *name, codeset cs)
1638 {
1639 rxvt_font *f;
1640
1641 if (!name || !*name)
1642 {
1643 name = "";
1644 f = new rxvt_font_default (this);
1645 }
1646 #if XFT
1647 else if (!strncmp (name, "xft:", 4))
1648 {
1649 name += 4;
1650 f = new rxvt_font_xft ();
1651 }
1652 #endif
1653 else if (!strncmp (name, "x:", 2))
1654 {
1655 name += 2;
1656 f = new rxvt_font_x11;
1657 }
1658 else
1659 f = new rxvt_font_x11;
1660
1661 f->set_name (strdup (name));
1662 prepare_font (f, cs);
1663
1664 return f;
1665 }
1666
1667 /////////////////////////////////////////////////////////////////////////////
1668
1669 void
1670 rxvt_fontset::push_font (rxvt_font *font)
1671 {
1672 // the fontCount index is reserved for the overflow font, it is only
1673 // necessary when we get fontCount or more fonts, as they cannot be
1674 // represented in the rendition.
1675 if (fonts.size () == fontCount)
1676 {
1677 rxvt_font *f = new rxvt_font_overflow (this);
1678
1679 prepare_font (f, CS_UNICODE);
1680 fonts.push_back (f);
1681 }
1682
1683 fonts.push_back (font);
1684 }
1685
1686 void
1687 rxvt_fontset::add_fonts (const char *desc)
1688 {
1689 if (desc)
1690 {
1691 char buf[512];
1692 const char *end;
1693
1694 do
1695 {
1696 while (*desc && *desc <= ' ')
1697 desc++;
1698
1699 codeset cs = CS_UNICODE;
1700
1701 if (*desc == '[')
1702 {
1703 char spec[256];
1704 const char *extra = ++desc; // not yet used
1705
1706 desc = strchr (desc, ']');
1707
1708 if (!desc)
1709 {
1710 rxvt_warn ("ERROR: opening '[' without closing ']' in font specification, trying to continue.\n");
1711 break;
1712 }
1713
1714 memcpy (spec, extra, min (desc - extra, 255));
1715 spec[min (desc - extra, 255)] = 0;
1716
1717 if (!strncmp (extra, "codeset=", sizeof ("codeset=") - 1))
1718 cs = codeset_from_name (spec + sizeof ("codeset=") - 1);
1719 else
1720 rxvt_warn ("unknown parameter '%s' in font specification, skipping.\n", spec);
1721
1722 desc++;
1723 while (*desc <= ' ' && *desc) desc++;
1724 }
1725
1726 end = strchr (desc, ',');
1727 if (!end)
1728 end = desc + strlen (desc);
1729
1730 if (end - desc < 511)
1731 {
1732 memcpy (buf, desc, end - desc);
1733 buf[end - desc] = 0;
1734
1735 push_font (new_font (buf, cs));
1736 }
1737 else
1738 rxvt_warn ("fontset element too long (>511 bytes), ignored.\n");
1739
1740 desc = end + 1;
1741 }
1742 while (*end);
1743 }
1744 }
1745
1746 bool
1747 rxvt_fontset::realize_font (int i)
1748 {
1749 if (i < 0 || i >= fonts.size ())
1750 return false;
1751
1752 if (fonts[i]->loaded)
1753 return true;
1754
1755 fonts[i]->loaded = true;
1756
1757 if (!fonts[i]->load (prop, force_prop))
1758 {
1759 fonts[i]->cs = CS_UNKNOWN;
1760 return false;
1761 }
1762
1763 return true;
1764 }
1765
1766 bool
1767 rxvt_fontset::populate (const char *desc)
1768 {
1769 clear ();
1770
1771 fontdesc = strdup (desc);
1772
1773 push_font (new_font (0, CS_UNICODE));
1774 realize_font (0);
1775
1776 add_fonts (desc);
1777
1778 return true;
1779 }
1780
1781 int
1782 rxvt_fontset::find_font (const char *name) const
1783 {
1784 for (rxvt_font *const *f = fonts.begin (); f < fonts.end (); f++)
1785 if ((*f)->name && !strcmp ((*f)->name, name))
1786 return f - fonts.begin ();
1787
1788 return -1;
1789 }
1790
1791 int
1792 rxvt_fontset::find_font_idx (unicode_t unicode)
1793 {
1794 // this limits fmap size. it has to accommodate COMPOSE_HI when UNICODE_3
1795 if (unicode > 0x1fffff)
1796 return 0;
1797
1798 unicode_t hi = unicode >> 8;
1799
1800 if (hi < fmap.size ())
1801 if (pagemap *pm = fmap[hi])
1802 if ((*pm)[unicode & 0xff] != 0xff)
1803 return (*pm)[unicode & 0xff];
1804
1805 unsigned int i;
1806
1807 for (i = 0; i < fonts.size (); i++)
1808 {
1809 rxvt_font *f = fonts[i];
1810
1811 if (!f->loaded)
1812 {
1813 if (FROM_UNICODE (f->cs, unicode) == NOCHAR)
1814 goto next_font;
1815
1816 if (!realize_font (i))
1817 goto next_font;
1818
1819 if (prop.ascent != rxvt_fontprop::unset)
1820 max_it (f->ascent, prop.ascent);
1821 }
1822
1823 if (f->cs == CS_UNKNOWN)
1824 goto next_font;
1825
1826 bool careful;
1827 if (f->has_char (unicode, &prop, careful))
1828 {
1829 i = (i << 1) | careful;
1830
1831 goto found;
1832 }
1833
1834 next_font:
1835 if (i == fonts.size () - 1)
1836 {
1837 // compose characters are handled by the default font, unless another font takes over
1838 // we do not go via the fallback list for speed reasons.
1839 if (IS_COMPOSE (unicode))
1840 return 0;
1841
1842 if (fallback->name)
1843 {
1844 // search through the fallback list
1845 push_font (new_font (fallback->name, fallback->cs));
1846 fallback++;
1847 }
1848 else
1849 {
1850 // try to find a new font.
1851 // only xft currently supported, as there is no
1852 // way to configure this and xft is easier to hack in,
1853 // while x11 has more framework in place already.
1854 // TODO: this is a real resource hog, xft takes ages(?)
1855 #if XFT && USE_SLOW_LOOKUP
1856 // grab the first xft font that seems suitable
1857 // TOOD: should go first for cellchar (spacing 110) then mono, then else
1858 FcPattern *p = FcPatternCreate ();
1859
1860 FcCharSet *s = FcCharSetCreate ();
1861 FcCharSetAddChar (s, unicode);
1862 FcPatternAddCharSet (p, FC_CHARSET, s);
1863 // charsets don't help that much, as xft might return
1864 // a non-matching font even if a better font is available :/
1865
1866 x x x x TODO prop might have unset contents
1867 FcPatternAddInteger (p, FC_PIXEL_SIZE, prop.height);
1868 FcPatternAddInteger (p, FC_WEIGHT, prop.weight);
1869 FcPatternAddInteger (p, FC_SLANT, prop.slant);
1870 FcPatternAddBool (p, FC_MINSPACE, 1);
1871 //FcPatternAddBool (p, FC_ANTIALIAS, 1);
1872
1873 XftResult result;
1874 FcPattern *match = XftFontMatch (term->dpy, term->display->screen, p, &result);
1875
1876 FcPatternDestroy (p);
1877
1878 if (match)
1879 {
1880 FcPatternDel (match, FC_CHARSET);
1881 char *font = (char *)FcNameUnparse (match);
1882 FcPatternDestroy (match);
1883
1884 if (find_font (font) < 0)
1885 {
1886 char fontname[4096];
1887 snprintf (fontname, sizeof (fontname), "xft:%s", font);
1888
1889 push_font (new_font (fontname, CS_UNICODE));
1890 }
1891
1892 free (font);
1893 }
1894 #endif
1895 }
1896 }
1897 }
1898
1899 /* we must return SOME font */
1900 i = 0;
1901
1902 found:
1903 // found a font, cache it
1904 if (i < 255)
1905 {
1906 while (hi >= fmap.size ())
1907 fmap.push_back (0);
1908
1909 if (!fmap[hi])
1910 {
1911 fmap[hi] = new pagemap;
1912 memset (fmap[hi], 0xff, sizeof (pagemap));
1913 }
1914
1915 (*fmap[hi])[unicode & 0xff] = i;
1916 }
1917
1918 return i;
1919 }
1920