diff options
Diffstat (limited to 'indra/llrender')
| -rw-r--r-- | indra/llrender/llfontfreetype.cpp | 150 |
1 files changed, 97 insertions, 53 deletions
diff --git a/indra/llrender/llfontfreetype.cpp b/indra/llrender/llfontfreetype.cpp index d87fb5245c..f987c599ad 100644 --- a/indra/llrender/llfontfreetype.cpp +++ b/indra/llrender/llfontfreetype.cpp @@ -354,11 +354,10 @@ void LLFontFreetype::clearFontStreams() } #endif -void LLFontFreetype::addFallbackFont(const LLPointer<LLFontFreetype>& fallback_font, const char_functor_t& functor) +void LLFontFreetype::addFallbackFont(const LLPointer<LLFontFreetype>& fallback_font, + const char_functor_t& functor) { - // Insert functor fallbacks before generic fallbacks - mFallbackFonts.insert((functor) ? std::find_if(mFallbackFonts.begin(), mFallbackFonts.end(), [](const fallback_font_t& fe) { return !fe.second; }) : mFallbackFonts.end(), - std::make_pair(fallback_font, functor)); + mFallbackFonts.emplace_back(fallback_font, functor); } F32 LLFontFreetype::getLineHeight() const @@ -450,55 +449,100 @@ BOOL LLFontFreetype::hasGlyph(llwchar wch) const LLFontGlyphInfo* LLFontFreetype::addGlyph(llwchar wch, EFontGlyphType glyph_type) const { - if (mFTFace == NULL) - return FALSE; - - llassert(!mIsFallback); - llassert(glyph_type < EFontGlyphType::Count); - //LL_DEBUGS() << "Adding new glyph for " << wch << " to font" << LL_ENDL; - - FT_UInt glyph_index; - - // Fallback fonts with a functor have precedence over everything else - fallback_font_vector_t::const_iterator it_fallback = mFallbackFonts.cbegin(); - /* This leads to a bug SL-19831 "Check marks in the menu are less visible." - ** Also, LLFontRegistry::createFont() says: "Fallback fonts don't render" - for (; it_fallback != mFallbackFonts.cend() && it_fallback->second; ++it_fallback) - { - if (it_fallback->second(wch)) - { - glyph_index = FT_Get_Char_Index(it_fallback->first->mFTFace, wch); - if (glyph_index) - { - return addGlyphFromFont(it_fallback->first, wch, glyph_index, glyph_type); - } - } - } - */ - - // Initialize char to glyph map - glyph_index = FT_Get_Char_Index(mFTFace, wch); - if (glyph_index == 0) - { - //LL_INFOS() << "Trying to add glyph from fallback font!" << LL_ENDL; - for (; it_fallback != mFallbackFonts.cend(); ++it_fallback) - { - glyph_index = FT_Get_Char_Index(it_fallback->first->mFTFace, wch); - if (glyph_index) - { - return addGlyphFromFont(it_fallback->first, wch, glyph_index, glyph_type); - } - } - } - - std::pair<char_glyph_info_map_t::iterator, char_glyph_info_map_t::iterator> range_it = mCharGlyphInfoMap.equal_range(wch); - char_glyph_info_map_t::iterator iter = - std::find_if(range_it.first, range_it.second, [&glyph_type](const char_glyph_info_map_t::value_type& entry) { return entry.second->mGlyphType == glyph_type; }); - if (iter == range_it.second) - { - return addGlyphFromFont(this, wch, glyph_index, glyph_type); - } - return NULL; + if (!mFTFace) + { + return NULL; + } + + llassert(!mIsFallback); + llassert(glyph_type < EFontGlyphType::Count); + //LL_DEBUGS() << "Adding new glyph for " << wch << " to font" << LL_ENDL; + + // Initialize char to glyph map + FT_UInt glyph_index = FT_Get_Char_Index(mFTFace, wch); + if (glyph_index == 0) + { + // No corresponding glyph in this font: look for a glyph in fallback + // fonts. + size_t count = mFallbackFonts.size(); + if (LLStringOps::isEmoji(wch)) + { + // This is a "genuine" emoji (in the range 0x1f000-0x20000): print + // it using the emoji font(s) if possible. HB + for (size_t i = 0; i < count; ++i) + { + const fallback_font_t& pair = mFallbackFonts[i]; + if (!pair.second || !pair.second(wch)) + { + // If this font does not have a functor, or the character + // does not pass the functor, reject it. Note: we keep the + // functor test (despite the fact we already tested for + // LLStringOps::isEmoji(wch) above), in case we would use + // different, more restrictive or partionned functors in + // the future with several different emoji fonts. HB + continue; + } + glyph_index = FT_Get_Char_Index(pair.first->mFTFace, wch); + if (glyph_index) + { + return addGlyphFromFont(pair.first, wch, glyph_index, + glyph_type); + } + } + } + // Then try and find a monochrome fallback font that could print this + // glyph: such fonts do *not* have a functor. We give priority to + // monochrome fonts for non-genuine emojis so that UI elements which + // used to render with them before the emojis font introduction (e.g. + // check marks in menus, or LSL dialogs text and buttons) do render the + // same way as they always did. HB + std::vector<size_t> emoji_fonts_idx; + for (size_t i = 0; i < count; ++i) + { + const fallback_font_t& pair = mFallbackFonts[i]; + if (pair.second) + { + // If this font got a functor, remember the index for later and + // try the next fallback font. HB + emoji_fonts_idx.push_back(i); + continue; + } + glyph_index = FT_Get_Char_Index(pair.first->mFTFace, wch); + if (glyph_index) + { + return addGlyphFromFont(pair.first, wch, glyph_index, + glyph_type); + } + } + // Everything failed so far: this character is not a genuine emoji, + // neither a special character known from our monochrome fallback + // fonts: make a last try, using the emoji font(s), but ignoring the + // functor to render using whatever (colorful) glyph that might be + // available in such fonts for this character. HB + for (size_t j = 0, count2 = emoji_fonts_idx.size(); j < count2; ++j) + { + const fallback_font_t& pair = mFallbackFonts[emoji_fonts_idx[j]]; + glyph_index = FT_Get_Char_Index(pair.first->mFTFace, wch); + if (glyph_index) + { + return addGlyphFromFont(pair.first, wch, glyph_index, + glyph_type); + } + } + } + + auto range_it = mCharGlyphInfoMap.equal_range(wch); + char_glyph_info_map_t::iterator iter = + std::find_if(range_it.first, range_it.second, + [&glyph_type](const char_glyph_info_map_t::value_type& entry) + { + return entry.second->mGlyphType == glyph_type; + }); + if (iter == range_it.second) + { + return addGlyphFromFont(this, wch, glyph_index, glyph_type); + } + return NULL; } LLFontGlyphInfo* LLFontFreetype::addGlyphFromFont(const LLFontFreetype *fontp, llwchar wch, U32 glyph_index, EFontGlyphType requested_glyph_type) const |