diff options
| -rw-r--r-- | src/gui/text/qfontengine.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/gui/text/qfontengine.cpp b/src/gui/text/qfontengine.cpp index ebaeb9b49b..29c48da7be 100644 --- a/src/gui/text/qfontengine.cpp +++ b/src/gui/text/qfontengine.cpp @@ -1905,8 +1905,33 @@ bool QFontEngineMulti::stringToCMap(const QChar *str, int len, int glyph_pos = 0; QStringIterator it(str, str + len); + + int lastFallback = -1; while (it.hasNext()) { const uint ucs4 = it.peekNext(); + + // If we applied a fallback font to previous glyph, and the current is either + // ZWJ or ZWNJ, we should also try applying the same fallback font to that, in order + // to get the correct shaping rules applied. + if (lastFallback >= 0 && (ucs4 == QChar(0x200d) || ucs4 == QChar(0x200c))) { + QFontEngine *engine = m_engines.at(lastFallback); + glyph_t glyph = engine->glyphIndex(ucs4); + if (glyph != 0) { + glyphs->glyphs[glyph_pos] = glyph; + if (!(flags & GlyphIndicesOnly)) { + QGlyphLayout g = glyphs->mid(glyph_pos, 1); + engine->recalcAdvances(&g, flags); + } + + // set the high byte to indicate which engine the glyph came from + glyphs->glyphs[glyph_pos] |= (lastFallback << 24); + } else { + lastFallback = -1; + } + } else { + lastFallback = -1; + } + if (glyphs->glyphs[glyph_pos] == 0 && ucs4 != QChar::LineSeparator && ucs4 != QChar::LineFeed @@ -1935,6 +1960,9 @@ bool QFontEngineMulti::stringToCMap(const QChar *str, int len, QGlyphLayout g = glyphs->mid(glyph_pos, 1); engine->recalcAdvances(&g, flags); } + + lastFallback = x; + // set the high byte to indicate which engine the glyph came from glyphs->glyphs[glyph_pos] |= (x << 24); break; |