Method MapResource

libs/drape/font_texture.cpp:110–150

}

ref_ptr<Texture::ResourceInfo> GlyphIndex::MapResource(GlyphFontAndId const & key, bool & newResource)
{
  newResource = false;
  if (auto const found = m_index.find(key); found != m_index.end())
    return make_ref(&found->second);

  newResource = true;

  constexpr bool kUseSdf = true;
  GlyphImage glyphImage = m_mng->GetGlyphImage(key, dp::kBaseFontSizePixels, kUseSdf);
  m2::RectU r;
  if (!m_packer.PackGlyph(glyphImage.m_width, glyphImage.m_height, r))
  {
    glyphImage.Destroy();

    LOG(LWARNING, ("Glyphs packer could not pack a glyph with fontIndex =", key.m_fontIndex, "glyphId =", key.m_glyphId,
                   "w =", glyphImage.m_width, "h =", glyphImage.m_height, "packerSize =", m_packer.GetSize()));

    // TODO(AB): Is it a valid invalid glyph?
    GlyphFontAndId constexpr kInvalidGlyphKey{0, 0};
    if (auto const found = m_index.find(kInvalidGlyphKey); found != m_index.end())
    {
      newResource = false;
      return make_ref(&found->second);
    }

    LOG(LERROR, ("Invalid glyph was not found in the index"));

    return nullptr;
  }

  auto res = m_index.emplace(key, GlyphInfo{m_packer.MapTextureCoords(r)});
  ASSERT(res.second, ());

  {
    std::lock_guard lock(m_mutex);
    m_pendingNodes.emplace_back(r, Glyph{std::move(glyphImage), key});
  }

  return make_ref(&res.first->second);
}

bool GlyphIndex::CanBeGlyphPacked(uint32_t glyphsCount) const
{