PassRefPtr<SimpleFontData> FontCache::fallbackFontForCharacter(const FontDescription& fontDescription, UChar32 c, const SimpleFontData*)
{
AtomicString familyName = getFamilyNameForCharacter(c, fontDescription.script());
if (familyName.isEmpty())
return getLastResortFallbackFont(fontDescription, DoNotRetain);
return fontDataFromFontPlatformData(getFontPlatformData(fontDescription, FontFaceCreationParams(familyName)), DoNotRetain);
}
PassRefPtr<SimpleFontData> FontCache::fallbackFontForCharacter(const FontDescription& fontDescription, UChar32 c, const SimpleFontData*, FontFallbackPriority fallbackPriority)
{
RefPtr<SkFontMgr> fm = adoptRef(SkFontMgr::RefDefault());
AtomicString familyName = getFamilyNameForCharacter(fm.get(), c, fontDescription, fallbackPriority);
if (familyName.isEmpty())
return getLastResortFallbackFont(fontDescription, DoNotRetain);
return fontDataFromFontPlatformData(getFontPlatformData(fontDescription, FontFaceCreationParams(familyName)), DoNotRetain);
}
// static
AtomicString FontCache::getGenericFamilyNameForScript(const AtomicString& familyName, UScriptCode script)
{
// This is a hack to use the preferred font for CJK scripts.
// FIXME: Use new Skia API once Android system supports per-family and per-script fallback fonts.
UChar32 examplerChar;
switch (script) {
case USCRIPT_SIMPLIFIED_HAN:
case USCRIPT_TRADITIONAL_HAN:
case USCRIPT_KATAKANA_OR_HIRAGANA:
examplerChar = 0x4E00; // A common character in Japanese and Chinese.
break;
case USCRIPT_HANGUL:
examplerChar = 0xAC00;
break;
default:
// For other scripts, use the default generic family mapping logic.
return familyName;
}
return getFamilyNameForCharacter(examplerChar, script);
}
// static
AtomicString FontCache::getGenericFamilyNameForScript(const AtomicString& familyName, const FontDescription& fontDescription)
{
// This is a hack to use the preferred font for CJK scripts.
// FIXME: Use new Skia API once Android system supports per-family and per-script fallback fonts.
UChar32 examplerChar;
switch (fontDescription.script()) {
case USCRIPT_SIMPLIFIED_HAN:
case USCRIPT_TRADITIONAL_HAN:
case USCRIPT_KATAKANA_OR_HIRAGANA:
examplerChar = 0x4E00; // A common character in Japanese and Chinese.
break;
case USCRIPT_HANGUL:
examplerChar = 0xAC00;
break;
default:
// For other scripts, use the default generic family mapping logic.
return familyName;
}
RefPtr<SkFontMgr> fm = adoptRef(SkFontMgr::RefDefault());
return getFamilyNameForCharacter(fm.get(), examplerChar, fontDescription, FontFallbackPriority::Text);
}
