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Comparing rxvt-unicode/src/rxvtfont.C (file contents):
Revision 1.205 by root, Thu Jun 17 14:55:05 2021 UTC vs.
Revision 1.223 by sf-exg, Sat Aug 19 17:44:35 2023 UTC

… …
134# endif 134# endif
135#endif 135#endif
136 136
137 //{ CS_UNICODE, "-*-unifont-*-*-*-*-*-*-*-*-c-*-iso10646-1" }, // this gem of a font has actual dotted circles within the combining character glyphs. 137 //{ CS_UNICODE, "-*-unifont-*-*-*-*-*-*-*-*-c-*-iso10646-1" }, // this gem of a font has actual dotted circles within the combining character glyphs.
138#if XFT 138#if XFT
139 { CS_UNICODE, "xft:Bitstream Vera Sans Mono:antialias=false:autohint=true" }, 139 { CS_UNICODE, "xft:DejaVu Sans Mono:antialias=false:autohint=true" },
140 { CS_UNICODE, "xft:Courier New:antialias=false:autohint=true" }, 140 { CS_UNICODE, "xft:Courier New:antialias=false:autohint=true" },
141 { CS_UNICODE, "xft:Andale Mono:antialias=false:autohint=false" }, 141 { CS_UNICODE, "xft:Andale Mono:antialias=false:autohint=false" },
142 { CS_UNICODE, "xft:Arial Unicode MS:antialias=false:autohint=false" }, 142 { CS_UNICODE, "xft:Arial Unicode MS:antialias=false:autohint=false" },
143 143
144 // FreeMono is usually uglier than x fonts, so try after the others 144 // FreeMono is usually uglier than x fonts, so try after the others
145 { CS_UNICODE, "xft:FreeMono:autohint=true" }, 145 { CS_UNICODE, "xft:FreeMono:autohint=true" },
146#endif 146#endif
147 147
… …
212} 212}
213 213
214///////////////////////////////////////////////////////////////////////////// 214/////////////////////////////////////////////////////////////////////////////
215 215
216rxvt_font::rxvt_font () 216rxvt_font::rxvt_font ()
217: name(0), width(rxvt_fontprop::unset), height(rxvt_fontprop::unset), can_compose(false) 217: name(0), width(rxvt_fontprop::unset), height(rxvt_fontprop::unset)
218{ 218{
219} 219}
220 220
221void 221void
222rxvt_font::set_name (char *name_) 222rxvt_font::set_name (char *name_)
… …
445#endif 445#endif
446#if ENABLE_COMBINING 446#if ENABLE_COMBINING
447 else if (IS_COMPOSE (t) && (cc = rxvt_composite[t])) 447 else if (IS_COMPOSE (t) && (cc = rxvt_composite[t]))
448 { 448 {
449 min_it (width, 2); // we only support wcwidth up to 2 449 min_it (width, 2); // we only support wcwidth up to 2
450
451 #if NOT_YET
452 vector<text_t> chrs;
453 chrs.reserve (rxvt_composite.expand (t));
454 rxvt_composite.expand (t, &chrs[0]);
455
456 while (!chrs.empty ())
457 {
458 rxvt_font *f1 = fs->find_font_idx (chrs[0])
459
460 int i = 0;
461 while (i < chrs.size () - 1
462 && f1->can_combine
463 && f1->has-char (chrs[i + 1], careful)
464 && !careful
465 ++i;
466
467 (*fs)[f1]->draw (d, x, y, &chrs[0], width, fg, bg);
468 chrs.erase (&chrs[0], &chrs[i]);
469 }
470 #endif
471
472 #if 1
473 text_t chrs[2]; 450 text_t chrs[2];
474 chrs [1] = NOCHAR; 451 chrs [1] = NOCHAR;
475 452
476 *chrs = cc->c1; 453 *chrs = cc->c1;
477 rxvt_font *f1 = (*fs)[fs->find_font_idx (cc->c1)]; 454 rxvt_font *f1 = (*fs)[fs->find_font_idx (cc->c1)];
… …
487 ? f1 464 ? f1
488 : (*fs)[fs->find_font_idx (cc->c2)]; 465 : (*fs)[fs->find_font_idx (cc->c2)];
489 466
490 f2->draw (d, x, y, chrs, width, fg, Color_none); 467 f2->draw (d, x, y, chrs, width, fg, Color_none);
491 } 468 }
492 #endif
493 } 469 }
494#endif 470#endif
495 else 471 else
496 switch (t) 472 switch (t)
497 { 473 {
… …
541 } 517 }
542 518
543 bool load (const rxvt_fontprop &prop, bool force_prop) 519 bool load (const rxvt_fontprop &prop, bool force_prop)
544 { 520 {
545 width = 1; height = 1; 521 width = 1; height = 1;
546 ascent = 1; descent = 0; 522 ascent = 1;
523 descent = (*fs)[2]->descent;
547 524
548 set_name (strdup ("built-in rendition overflow font")); 525 set_name (strdup ("built-in rendition overflow font"));
549 526
550 return true; 527 return true;
551 } 528 }
… …
1161 1138
1162#if XFT 1139#if XFT
1163 1140
1164struct rxvt_font_xft : rxvt_font 1141struct rxvt_font_xft : rxvt_font
1165{ 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
1166 rxvt_font_xft () 1154 rxvt_font_xft ()
1167 { 1155 {
1168 can_compose = true;
1169 f = 0; 1156 f = 0;
1170 } 1157 }
1171 1158
1172 void clear (); 1159 void clear ();
1173 1160
… …
1277 break; 1264 break;
1278 } 1265 }
1279 1266
1280 FT_Face face = XftLockFace (f); 1267 FT_Face face = XftLockFace (f);
1281 1268
1269 // fuck me plenty: XftLockFace can actually return 0. try not to crash.
1270 // we also assume blindly that if the first lock succeeds, then subsequent
1271 // locks will also succeed.
1272 if (!face)
1273 {
1274 XftFontClose (disp, f);
1275 success = false;
1276 break;
1277 }
1278
1282 ascent = (face->size->metrics.ascender + 63) >> 6; 1279 ascent = (face->size->metrics.ascender + 63) >> 6;
1283 descent = (-face->size->metrics.descender + 63) >> 6; 1280 descent = (-face->size->metrics.descender + 63) >> 6;
1284 height = max (ascent + descent, (face->size->metrics.height + 63) >> 6); 1281 height = max (ascent + descent, (face->size->metrics.height + 63) >> 6);
1285 width = 0; 1282 width = 0;
1286 1283
… …
1355 clear (); 1352 clear ();
1356 success = false; 1353 success = false;
1357 } 1354 }
1358#endif 1355#endif
1359 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
1360 return success; 1370 return success;
1361} 1371}
1362 1372
1363bool 1373bool
1364rxvt_font_xft::has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const 1374rxvt_font_xft::has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
1365{ 1375{
1366 careful = false; 1376 careful = false;
1367 1377
1378 // handle non-bmp chars when text_t is 16 bit
1368#if ENABLE_COMBINING && !UNICODE_3 1379#if ENABLE_COMBINING && !UNICODE_3
1369 // handle non-BMP characters when our storage uses 16 bit
1370 if (ecb_expect_false (IS_COMPOSE (unicode))) 1380 if (ecb_expect_false (IS_COMPOSE (unicode)))
1371 if (compose_char *cc = rxvt_composite[unicode]) 1381 if (compose_char *cc = rxvt_composite [unicode])
1372 if (cc->c2 == NOCHAR) 1382 if (cc->c2 == NOCHAR)
1373 unicode = cc->c1; 1383 unicode = cc->c1;
1374#endif 1384 else
1375 1385 return false;
1376 if (!XftCharExists (term->dpy, f, unicode)) 1386 else
1377 return false; 1387 return false;
1388#endif
1378 1389
1379 // some fonts claim they can render private use chars and then 1390 FcChar32 chr = unicode;
1380 // render them as boxes. 1391
1381 if (ecb_expect_false (IS_COMPOSE (unicode))) 1392 if (!XftCharExists (term->dpy, f, chr))
1382 return false; 1393 return false;
1383 1394
1384 if (!prop || prop->width == rxvt_fontprop::unset) 1395 if (!prop || prop->width == rxvt_fontprop::unset)
1385 return true; 1396 return true;
1386 1397
1387 // check character against base font bounding box 1398 int wcw = max (WCWIDTH (chr), 1);
1388 FcChar32 ch = unicode; 1399
1389 XGlyphInfo g; 1400 XGlyphInfo g;
1390 XftTextExtents32 (term->dpy, f, &ch, 1, &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;
1391 1408
1392 int w = g.width - g.x; 1409 int w = g.width - g.x;
1393 int wcw = max (WCWIDTH (unicode), 1);
1394 1410
1395 careful = g.x > 0 || w > prop->width * wcw; 1411 careful = g.x > 0 || w > cwidth;
1396 1412
1397 if (careful && !OVERLAP_OK (w, wcw, prop)) 1413 if (careful && !OVERLAP_OK (w, wcw, prop))
1398 return false; 1414 return false;
1399 1415
1400 // this weeds out _totally_ broken fonts, or glyphs 1416 // this weeds out _totally_ broken fonts, or glyphs
… …
1407void 1423void
1408rxvt_font_xft::draw (rxvt_drawable &d, int x, int y, 1424rxvt_font_xft::draw (rxvt_drawable &d, int x, int y,
1409 const text_t *text, int len, 1425 const text_t *text, int len,
1410 int fg, int bg) 1426 int fg, int bg)
1411{ 1427{
1412 XGlyphInfo extents;
1413 XftGlyphSpec *enc = rxvt_temp_buf<XftGlyphSpec> (len); 1428 XftGlyphSpec *enc = rxvt_temp_buf<XftGlyphSpec> (len);
1414 XftGlyphSpec *ep = enc; 1429 XftGlyphSpec *ep = enc;
1415 1430
1416 dTermDisplay; 1431 dTermDisplay;
1417 dTermGC; 1432 dTermGC;
… …
1430 int y_ = buffered ? 0 : y; 1445 int y_ = buffered ? 0 : y;
1431 1446
1432 while (len) 1447 while (len)
1433 { 1448 {
1434 int cwidth = term->fwidth; 1449 int cwidth = term->fwidth;
1435 FcChar32 fc = *text++; len--; 1450 FcChar32 chr = *text++; len--;
1436
1437#if ENABLE_COMBINING && !UNICODE_3
1438 // handle non-BMP characters when our storage uses 16 bit
1439 if (ecb_expect_false (IS_COMPOSE (fc)))
1440 if (compose_char *cc = rxvt_composite[fc]) // should always be true, but better be safe than sorry
1441 fc = cc->c1; // c2 must be NOCHAR, as has_char handles it that way
1442#endif
1443 1451
1444 while (len && *text == NOCHAR) 1452 while (len && *text == NOCHAR)
1445 text++, len--, cwidth += term->fwidth; 1453 text++, len--, cwidth += term->fwidth;
1446 1454
1447 if (fc != ' ') // skip spaces 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)
1448 { 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 {
1449 FT_UInt glyph = XftCharIndex (disp, f, fc); 1491 glyph = XftCharIndex (disp, f, chr);
1492 XGlyphInfo extents;
1450 XftGlyphExtents (disp, f, &glyph, 1, &extents); 1493 XftGlyphExtents (disp, f, &glyph, 1, &extents);
1494 xOff = extents.xOff;
1495 }
1451 1496
1452 ep->glyph = glyph; 1497 ep->glyph = glyph;
1453 ep->x = x_ + (cwidth - extents.xOff >> 1); 1498 ep->x = x_;
1454 ep->y = y_ + ascent; 1499 ep->y = y_ + ascent;
1455 1500
1456 if (extents.xOff == 0) 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.
1457 ep->x = x_ + cwidth; 1512 ep->x += xOff ? 0 : cwidth;
1458 1513
1459 ep++; 1514 ++ep;
1460 } 1515 }
1461 1516
1462 x_ += cwidth; 1517 x_ += cwidth;
1463 } 1518 }
1464 1519
… …
1733} 1788}
1734 1789
1735int 1790int
1736rxvt_fontset::find_font_idx (unicode_t unicode) 1791rxvt_fontset::find_font_idx (unicode_t unicode)
1737{ 1792{
1738 // this limits fmap size. it has to accomodate COMPOSE_HI when UNICODE_3 1793 // this limits fmap size. it has to accommodate COMPOSE_HI when UNICODE_3
1739 if (unicode > 0x1fffff) 1794 if (unicode > 0x1fffff)
1740 return 0; 1795 return 0;
1741 1796
1742 unicode_t hi = unicode >> 8; 1797 unicode_t hi = unicode >> 8;
1743 1798

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