PassRefPtr<FontData> CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription)
{
if (!isValid())
return nullptr;
FontTraits desiredTraits = fontDescription.traits();
FontCacheKey key = fontDescription.cacheKey(FontFaceCreationParams(), desiredTraits);
RefPtr<SegmentedFontData>& fontData = m_fontDataTable.add(key.hash(), nullptr).storedValue->value;
if (fontData && fontData->numFaces())
return fontData; // No release, we have a reference to an object in the cache which should retain the ref count it has.
if (!fontData)
fontData = SegmentedFontData::create();
FontDescription requestedFontDescription(fontDescription);
requestedFontDescription.setTraits(m_traits);
requestedFontDescription.setSyntheticBold(m_traits.weight() < FontWeight600 && desiredTraits.weight() >= FontWeight600);
requestedFontDescription.setSyntheticItalic(m_traits.style() == FontStyleNormal && desiredTraits.style() == FontStyleItalic);
for (FontFaceList::reverse_iterator it = m_fontFaces.rbegin(); it != m_fontFaces.rend(); ++it) {
if (!(*it)->cssFontFace()->isValid())
continue;
if (RefPtr<SimpleFontData> faceFontData = (*it)->cssFontFace()->getFontData(requestedFontDescription)) {
ASSERT(!faceFontData->isSegmented());
fontData->appendFace(FontDataForRangeSet(faceFontData.release(), (*it)->cssFontFace()->ranges()));
}
}
if (fontData->numFaces())
return fontData; // No release, we have a reference to an object in the cache which should retain the ref count it has.
return nullptr;
}
FallbackListCompositeKey FontFallbackList::compositeKey(const FontDescription& fontDescription) const
{
FallbackListCompositeKey key(fontDescription);
const FontFamily* currentFamily = &fontDescription.family();
while (currentFamily) {
if (currentFamily->family().length()) {
FontFaceCreationParams params(adjustFamilyNameToAvoidUnsupportedFonts(currentFamily->family()));
RefPtr<FontData> result;
if (m_fontSelector)
result = m_fontSelector->getFontData(fontDescription, currentFamily->family());
if (!result) {
if (FontPlatformData* platformData = FontCache::fontCache()->getFontPlatformData(fontDescription, params))
result = FontCache::fontCache()->fontDataFromFontPlatformData(platformData);
}
// Include loading state and version when constructing key, that way if called when a font is loading
// and then again once it has been loaded or updated different keys are produced.
if (result) {
FontCacheKey cacheKey = fontDescription.cacheKey(params, FontTraits(0),
result->isLoading() || result->isLoadingFallback(),
m_fontSelector ? m_fontSelector->version() : 0);
key.add(cacheKey);
}
}
currentFamily = currentFamily->next();
}
return key;
}
PassRefPtr<FontData> CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription)
{
if (!isValid())
return nullptr;
FontTraitsMask desiredTraitsMask = fontDescription.traitsMask();
AtomicString emptyFontFamily = "";
FontCacheKey key = fontDescription.cacheKey(emptyFontFamily, desiredTraitsMask);
RefPtr<SegmentedFontData>& fontData = m_fontDataTable.add(key.hash(), nullptr).storedValue->value;
if (fontData && fontData->numRanges())
return fontData; // No release, we have a reference to an object in the cache which should retain the ref count it has.
if (!fontData)
fontData = SegmentedFontData::create();
FontDescription requestedFontDescription(fontDescription);
requestedFontDescription.setTraitsMask(m_traitsMask);
requestedFontDescription.setSyntheticBold(!(m_traitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)) && (desiredTraitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)));
requestedFontDescription.setSyntheticItalic(!(m_traitsMask & FontStyleItalicMask) && (desiredTraitsMask & FontStyleItalicMask));
for (FontFaceList::reverse_iterator it = m_fontFaces.rbegin(); it != m_fontFaces.rend(); ++it) {
if (!(*it)->cssFontFace()->isValid())
continue;
if (RefPtr<SimpleFontData> faceFontData = (*it)->cssFontFace()->getFontData(requestedFontDescription)) {
ASSERT(!faceFontData->isSegmented());
#if ENABLE(SVG_FONTS)
// For SVG Fonts that specify that they only support the "normal" variant, we will assume they are incapable
// of small-caps synthesis and just ignore the font face.
if (faceFontData->isSVGFont() && (desiredTraitsMask & FontVariantSmallCapsMask) && !(m_traitsMask & FontVariantSmallCapsMask))
continue;
#endif
appendFontData(fontData.get(), faceFontData.release(), (*it)->cssFontFace()->ranges());
}
}
if (fontData->numRanges())
return fontData; // No release, we have a reference to an object in the cache which should retain the ref count it has.
return nullptr;
}
PassRefPtr<SimpleFontData> CSSFontFaceSource::getFontData(
const FontDescription& fontDescription) {
// If the font hasn't loaded or an error occurred, then we've got nothing.
if (!isValid())
return nullptr;
if (isLocal()) {
// We're local. Just return a SimpleFontData from the normal cache.
return createFontData(fontDescription);
}
// See if we have a mapping in our FontData cache.
// TODO(drott): Check whether losing traits information here is problematic.
// crbug.com/516677
FontCacheKey key = fontDescription.cacheKey(FontFaceCreationParams());
RefPtr<SimpleFontData>& fontData =
m_fontDataTable.add(key, nullptr).storedValue->value;
if (!fontData)
fontData = createFontData(fontDescription);
// No release, because fontData is a reference to a RefPtr that is held in the
// m_fontDataTable.
return fontData;
}
PassRefPtr<SimpleFontData> CSSFontFaceSource::getFontData(const FontDescription& fontDescription)
{
// If the font hasn't loaded or an error occurred, then we've got nothing.
if (!isValid())
return 0;
if (isLocal()) {
// We're local. Just return a SimpleFontData from the normal cache.
// We don't want to check alternate font family names here, so pass true as the checkingAlternateName parameter.
RefPtr<SimpleFontData> fontData = FontCache::fontCache()->getFontData(fontDescription, m_string, true);
m_histograms.recordLocalFont(fontData);
return fontData;
}
// See if we have a mapping in our FontData cache.
AtomicString emptyFontFamily = "";
FontCacheKey key = fontDescription.cacheKey(emptyFontFamily);
RefPtr<SimpleFontData>& fontData = m_fontDataTable.add(key.hash(), 0).iterator->value;
if (fontData)
return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.
// If we are still loading, then we let the system pick a font.
if (isLoaded()) {
if (m_font) {
#if ENABLE(SVG_FONTS)
if (m_hasExternalSVGFont) {
// For SVG fonts parse the external SVG document, and extract the <font> element.
if (!m_font->ensureSVGFontData())
return 0;
if (!m_externalSVGFontElement) {
String fragmentIdentifier;
size_t start = m_string.find('#');
if (start != kNotFound)
fragmentIdentifier = m_string.string().substring(start + 1);
m_externalSVGFontElement = m_font->getSVGFontById(fragmentIdentifier);
}
if (!m_externalSVGFontElement)
return 0;
SVGFontFaceElement* fontFaceElement = 0;
// Select first <font-face> child
for (Node* fontChild = m_externalSVGFontElement->firstChild(); fontChild; fontChild = fontChild->nextSibling()) {
if (fontChild->hasTagName(SVGNames::font_faceTag)) {
fontFaceElement = toSVGFontFaceElement(fontChild);
break;
}
}
if (fontFaceElement) {
if (!m_svgFontFaceElement) {
// We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement.
// Use the imported <font-face> tag as referencing font-face element for these cases.
m_svgFontFaceElement = fontFaceElement;
}
fontData = SimpleFontData::create(
SVGFontData::create(fontFaceElement),
fontDescription.effectiveFontSize(),
fontDescription.isSyntheticBold(),
fontDescription.isSyntheticItalic());
}
} else
#endif
{
// Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
if (!m_font->ensureCustomFontData())
return 0;
fontData = SimpleFontData::create(
m_font->platformDataFromCustomData(fontDescription.effectiveFontSize(),
fontDescription.isSyntheticBold(), fontDescription.isSyntheticItalic(),
fontDescription.orientation(), fontDescription.widthVariant()), CustomFontData::create(false));
}
} else {
#if ENABLE(SVG_FONTS)
// In-Document SVG Fonts
if (m_svgFontFaceElement) {
fontData = SimpleFontData::create(
SVGFontData::create(m_svgFontFaceElement.get()),
fontDescription.effectiveFontSize(),
fontDescription.isSyntheticBold(),
fontDescription.isSyntheticItalic());
}
#endif
}
} else {
// This temporary font is not retained and should not be returned.
FontCachePurgePreventer fontCachePurgePreventer;
SimpleFontData* temporaryFont = FontCache::fontCache()->getNonRetainedLastResortFallbackFont(fontDescription);
if (!temporaryFont) {
ASSERT_NOT_REACHED();
return 0;
}
RefPtr<CSSCustomFontData> cssFontData = CSSCustomFontData::create(true);
cssFontData->setCSSFontFaceSource(this);
fontData = SimpleFontData::create(temporaryFont->platformData(), cssFontData);
}
return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.
}
