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/cvs/rxvt-unicode/src/rxvtfont.C
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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 1.216 by root, Sat Jun 19 10:08:10 2021 UTC

… …
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 {
… …
1163 1139
1164struct rxvt_font_xft : rxvt_font 1140struct rxvt_font_xft : rxvt_font
1165{ 1141{
1166 rxvt_font_xft () 1142 rxvt_font_xft ()
1167 { 1143 {
1168 can_compose = true;
1169 f = 0; 1144 f = 0;
1170 } 1145 }
1171 1146
1172 void clear (); 1147 void clear ();
1173 1148
… …
1363bool 1338bool
1364rxvt_font_xft::has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const 1339rxvt_font_xft::has_char (unicode_t unicode, const rxvt_fontprop *prop, bool &careful) const
1365{ 1340{
1366 careful = false; 1341 careful = false;
1367 1342
1343 // handle non-bmp chars when text_t is 16 bit
1368#if ENABLE_COMBINING && !UNICODE_3 1344#if ENABLE_COMBINING && !UNICODE_3
1369 // handle non-BMP characters when our storage uses 16 bit
1370 if (ecb_expect_false (IS_COMPOSE (unicode))) 1345 if (ecb_expect_false (IS_COMPOSE (unicode)))
1371 if (compose_char *cc = rxvt_composite[unicode]) 1346 if (compose_char *cc = rxvt_composite [unicode])
1372 if (cc->c2 == NOCHAR) 1347 if (cc->c2 == NOCHAR)
1373 unicode = cc->c1; 1348 unicode = cc->c1;
1374#endif 1349 else
1375 1350 return false;
1376 if (!XftCharExists (term->dpy, f, unicode)) 1351 else
1377 return false; 1352 return false;
1353#endif
1378 1354
1379 // some fonts claim they can render private use chars and then 1355 FcChar32 chr = unicode;
1380 // render them as boxes. 1356
1381 if (ecb_expect_false (IS_COMPOSE (unicode))) 1357 if (!XftCharExists (term->dpy, f, chr))
1382 return false; 1358 return false;
1383 1359
1384 if (!prop || prop->width == rxvt_fontprop::unset) 1360 if (!prop || prop->width == rxvt_fontprop::unset)
1385 return true; 1361 return true;
1386 1362
1387 // check character against base font bounding box 1363 int wcw = max (WCWIDTH (chr), 1);
1388 FcChar32 ch = unicode; 1364
1389 XGlyphInfo g; 1365 XGlyphInfo g;
1390 XftTextExtents32 (term->dpy, f, &ch, 1, &g); 1366 XftTextExtents32 (term->dpy, f, &chr, 1, &g);
1391 1367
1392 int w = g.width - g.x; 1368 int w = g.width - g.x;
1393 int wcw = max (WCWIDTH (unicode), 1);
1394 1369
1395 careful = g.x > 0 || w > prop->width * wcw; 1370 careful = g.x > 0 || w > prop->width * wcw;
1396 1371
1397 if (careful && !OVERLAP_OK (w, wcw, prop)) 1372 if (careful && !OVERLAP_OK (w, wcw, prop))
1398 return false; 1373 return false;
… …
1407void 1382void
1408rxvt_font_xft::draw (rxvt_drawable &d, int x, int y, 1383rxvt_font_xft::draw (rxvt_drawable &d, int x, int y,
1409 const text_t *text, int len, 1384 const text_t *text, int len,
1410 int fg, int bg) 1385 int fg, int bg)
1411{ 1386{
1412 XGlyphInfo extents;
1413 XftGlyphSpec *enc = rxvt_temp_buf<XftGlyphSpec> (len); 1387 XftGlyphSpec *enc = rxvt_temp_buf<XftGlyphSpec> (len);
1414 XftGlyphSpec *ep = enc; 1388 XftGlyphSpec *ep = enc;
1415 1389
1416 dTermDisplay; 1390 dTermDisplay;
1417 dTermGC; 1391 dTermGC;
… …
1430 int y_ = buffered ? 0 : y; 1404 int y_ = buffered ? 0 : y;
1431 1405
1432 while (len) 1406 while (len)
1433 { 1407 {
1434 int cwidth = term->fwidth; 1408 int cwidth = term->fwidth;
1435 FcChar32 fc = *text++; len--; 1409 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 1410
1444 while (len && *text == NOCHAR) 1411 while (len && *text == NOCHAR)
1445 text++, len--, cwidth += term->fwidth; 1412 text++, len--, cwidth += term->fwidth;
1446 1413
1447 if (fc != ' ') // skip spaces 1414 if (chr != ' ') // skip spaces
1415 {
1416 // handle non-bmp chars when text_t is 16 bit
1417 #if ENABLE_COMBINING && !UNICODE_3
1418 if (ecb_expect_false (IS_COMPOSE (chr)))
1419 if (compose_char *cc = rxvt_composite [chr])
1420 if (cc->c2 == NOCHAR)
1421 chr = cc->c1;
1422 #endif
1423
1424 #if 0
1425 FT_UInt glyphs [decltype (exp)::max_size];
1426
1427 for (int i = 0; i < nchrs; ++i)
1428 glyphs [i] = XftCharIndex (disp, f, chrs [i]);
1429
1430 for (int i = 0; i < nchrs; ++i)
1448 { 1431 {
1432 XGlyphInfo ep;
1433 XftGlyphExtents (disp, f, glyphs+i, 1, &ep);
1434 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);
1435 }
1436 #endif
1437
1449 FT_UInt glyph = XftCharIndex (disp, f, fc); 1438 FT_UInt glyph = XftCharIndex (disp, f, chr);
1439 XGlyphInfo extents;
1450 XftGlyphExtents (disp, f, &glyph, 1, &extents); 1440 XftGlyphExtents (disp, f, &glyph, 1, &extents);
1451 1441
1452 ep->glyph = glyph; 1442 ep->glyph = glyph;
1453 ep->x = x_ + (cwidth - extents.xOff >> 1); 1443 ep->x = x_;
1454 ep->y = y_ + ascent; 1444 ep->y = y_ + ascent;
1455 1445
1456 if (extents.xOff == 0) 1446 // the xft font cell might differ from the terminal font cell,
1457 ep->x = x_ + cwidth; 1447 // in which case we use the average between the two.
1448 ep->x += extents.xOff ? cwidth - extents.xOff >> 1 : 0;
1458 1449
1450 // xft/freetype represent combining characters as characters with zero
1451 // width rendered over the previous character with some fonts, while
1452 // in other fonts, they are considered normal characters, while yet
1453 // in other fonts, they are shifted all over the place.
1454 // we handle the first two cases by keying off on xOff being 0
1455 // for zero-width chars. normally, we would add extents.xOff
1456 // of the base character here, but we don't have that, so we use cwidth.
1457 ep->x += extents.xOff ? 0 : cwidth;
1458
1459 ep++; 1459 ++ep;
1460 } 1460 }
1461 1461
1462 x_ += cwidth; 1462 x_ += cwidth;
1463 } 1463 }
1464 1464
… …
1733} 1733}
1734 1734
1735int 1735int
1736rxvt_fontset::find_font_idx (unicode_t unicode) 1736rxvt_fontset::find_font_idx (unicode_t unicode)
1737{ 1737{
1738 // this limits fmap size. it has to accomodate COMPOSE_HI when UNICODE_3 1738 // this limits fmap size. it has to accommodate COMPOSE_HI when UNICODE_3
1739 if (unicode > 0x1fffff) 1739 if (unicode > 0x1fffff)
1740 return 0; 1740 return 0;
1741 1741
1742 unicode_t hi = unicode >> 8; 1742 unicode_t hi = unicode >> 8;
1743 1743

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