void FontCache::purgeInactiveFontData(unsigned purgeCount)
{
pruneUnreferencedEntriesFromFontCascadeCache();
pruneSystemFallbackFonts();
#if PLATFORM(IOS)
FontLocker fontLocker;
#endif
while (purgeCount) {
Vector<RefPtr<Font>, 20> fontsToDelete;
for (auto& font : cachedFonts().values()) {
if (!font->hasOneRef())
continue;
fontsToDelete.append(WTF::move(font));
if (!--purgeCount)
break;
}
// Fonts may ref other fonts so we loop until there are no changes.
if (fontsToDelete.isEmpty())
break;
for (auto& font : fontsToDelete)
cachedFonts().remove(font->platformData());
};
Vector<FontPlatformDataCacheKey> keysToRemove;
keysToRemove.reserveInitialCapacity(fontPlatformDataCache().size());
for (auto& entry : fontPlatformDataCache()) {
if (entry.value && !cachedFonts().contains(*entry.value))
keysToRemove.append(entry.key);
}
for (auto key : keysToRemove)
fontPlatformDataCache().remove(key);
#if ENABLE(OPENTYPE_VERTICAL)
FontVerticalDataCache& fontVerticalDataCache = fontVerticalDataCacheInstance();
if (!fontVerticalDataCache.isEmpty()) {
// Mark & sweep unused verticalData
for (auto& verticalData : fontVerticalDataCache.values()) {
if (verticalData)
verticalData->m_inFontCache = false;
}
for (auto& font : cachedFonts().values()) {
auto* verticalData = const_cast<OpenTypeVerticalData*>(font->verticalData());
if (verticalData)
verticalData->m_inFontCache = true;
}
Vector<FontFileKey> keysToRemove;
keysToRemove.reserveInitialCapacity(fontVerticalDataCache.size());
for (auto& it : fontVerticalDataCache) {
if (!it.value || !it.value->m_inFontCache)
keysToRemove.append(it.key);
}
for (auto& key : keysToRemove)
fontVerticalDataCache.remove(key);
}
#endif
platformPurgeInactiveFontData();
}
void FontCache::purgeInactiveFontData(unsigned purgeCount)
{
pruneUnreferencedEntriesFromFontCascadeCache();
pruneSystemFallbackFonts();
#if PLATFORM(IOS)
FontLocker fontLocker;
#endif
while (purgeCount) {
Vector<RefPtr<Font>, 20> fontsToDelete;
for (auto& font : cachedFonts().values()) {
if (!font->hasOneRef())
continue;
fontsToDelete.append(WTFMove(font));
if (!--purgeCount)
break;
}
// Fonts may ref other fonts so we loop until there are no changes.
if (fontsToDelete.isEmpty())
break;
for (auto& font : fontsToDelete) {
bool success = cachedFonts().remove(font->platformData());
ASSERT_UNUSED(success, success);
#if ENABLE(OPENTYPE_VERTICAL)
fontVerticalDataCache().remove(font->platformData());
#endif
}
};
Vector<FontPlatformDataCacheKey> keysToRemove;
keysToRemove.reserveInitialCapacity(fontPlatformDataCache().size());
for (auto& entry : fontPlatformDataCache()) {
if (entry.value && !cachedFonts().contains(*entry.value))
keysToRemove.append(entry.key);
}
for (auto& key : keysToRemove)
fontPlatformDataCache().remove(key);
platformPurgeInactiveFontData();
}
size_t FontCache::inactiveFontCount()
{
#if PLATFORM(IOS)
FontLocker fontLocker;
#endif
unsigned count = 0;
for (auto& font : cachedFonts().values()) {
if (font->hasOneRef())
++count;
}
return count;
}
Ref<Font> FontCache::fontForPlatformData(const FontPlatformData& platformData)
{
#if PLATFORM(IOS)
FontLocker fontLocker;
#endif
auto addResult = cachedFonts().add(platformData, nullptr);
if (addResult.isNewEntry)
addResult.iterator->value = Font::create(platformData);
return *addResult.iterator->value;
}
void FontCache::purgeInactiveFontDataIfNeeded()
{
bool underMemoryPressure = MemoryPressureHandler::singleton().isUnderMemoryPressure();
unsigned inactiveFontDataLimit = underMemoryPressure ? cMaxUnderMemoryPressureInactiveFontData : cMaxInactiveFontData;
if (cachedFonts().size() < inactiveFontDataLimit)
return;
unsigned inactiveCount = inactiveFontCount();
if (inactiveCount <= inactiveFontDataLimit)
return;
unsigned targetFontDataLimit = underMemoryPressure ? cTargetUnderMemoryPressureInactiveFontData : cTargetInactiveFontData;
purgeInactiveFontData(inactiveCount - targetFontDataLimit);
}
size_t FontCache::fontCount()
{
return cachedFonts().size();
}