FontCacheKey FontDescription::cacheKey(const FontFaceCreationParams& creationParams, FontTraits desiredTraits) const
{
FontTraits fontTraits = desiredTraits.bitfield() ? desiredTraits : traits();
unsigned options =
static_cast<unsigned>(m_syntheticItalic) << 5 | // bit 6
static_cast<unsigned>(m_syntheticBold) << 4 | // bit 5
static_cast<unsigned>(m_textRendering) << 2 | // bits 3-4
static_cast<unsigned>(m_orientation) << 1 | // bit 2
static_cast<unsigned>(m_subpixelTextPosition); // bit 1
return FontCacheKey(creationParams, effectiveFontSize(), options | fontTraits.bitfield() << 8);
}
CSSSegmentedFontFace* FontFaceCache::get(const FontDescription& fontDescription, const AtomicString& family)
{
TraitsMap* familyFontFaces = m_fontFaces.get(family);
if (!familyFontFaces || familyFontFaces->isEmpty())
return 0;
FamilyToTraitsMap::AddResult traitsResult = m_fonts.add(family, nullptr);
if (!traitsResult.storedValue->value)
traitsResult.storedValue->value = adoptPtr(new TraitsMap);
FontTraits traits = fontDescription.traits();
TraitsMap::AddResult faceResult = traitsResult.storedValue->value->add(traits.bitfield(), nullptr);
if (!faceResult.storedValue->value) {
for (TraitsMap::const_iterator i = familyFontFaces->begin(); i != familyFontFaces->end(); ++i) {
CSSSegmentedFontFace* candidate = i->value.get();
FontTraits candidateTraits = candidate->traits();
if (traits.style() == FontStyleNormal && candidateTraits.style() != FontStyleNormal)
continue;
if (traits.variant() == FontVariantNormal && candidateTraits.variant() != FontVariantNormal)
continue;
if (!faceResult.storedValue->value || compareFontFaces(candidate, faceResult.storedValue->value.get(), traits))
faceResult.storedValue->value = candidate;
}
}
return faceResult.storedValue->value.get();
}
CSSSegmentedFontFace* FontFaceCache::get(const FontDescription& fontDescription, const AtomicString& family)
{
TraitsMap* familyFontFaces = m_fontFaces.get(family);
if (!familyFontFaces || familyFontFaces->isEmpty())
return nullptr;
FamilyToTraitsMap::AddResult traitsResult = m_fonts.add(family, nullptr);
if (!traitsResult.storedValue->value)
traitsResult.storedValue->value = new TraitsMap;
FontTraits traits = fontDescription.traits();
TraitsMap::AddResult faceResult = traitsResult.storedValue->value->add(traits.bitfield(), nullptr);
if (!faceResult.storedValue->value) {
for (const auto& item : *familyFontFaces) {
CSSSegmentedFontFace* candidate = item.value.get();
FontStyleMatcher styleMatcher(traits);
if (!faceResult.storedValue->value || styleMatcher.isCandidateBetter(candidate, faceResult.storedValue->value.get()))
faceResult.storedValue->value = candidate;
}
}
return faceResult.storedValue->value.get();
}