GlyphData FontCascadeFonts::glyphDataForNormalVariant(UChar32 c, const FontDescription& description)
{
const unsigned pageNumber = c / GlyphPage::size;
for (unsigned fallbackIndex = 0; true; ++fallbackIndex) {
auto& fontRanges = realizeFallbackRangesAt(description, fallbackIndex);
if (fontRanges.isNull())
break;
auto* font = fontRanges.fontForCharacter(c);
auto* page = font ? font->glyphPage(pageNumber) : nullptr;
if (!page)
continue;
GlyphData data = page->glyphDataForCharacter(c);
if (data.font) {
if (data.font->platformData().orientation() == Vertical && !data.font->isTextOrientationFallback()) {
if (!FontCascade::isCJKIdeographOrSymbol(c))
return glyphDataForNonCJKCharacterWithGlyphOrientation(c, description.nonCJKGlyphOrientation(), data);
if (!data.font->hasVerticalGlyphs()) {
// Use the broken ideograph font data. The broken ideograph font will use the horizontal width of glyphs
// to make sure you get a square (even for broken glyphs like symbols used for punctuation).
return glyphDataForVariant(c, description, BrokenIdeographVariant, fallbackIndex);
}
#if PLATFORM(COCOA)
if (data.font->platformData().syntheticOblique())
return glyphDataForCJKCharacterWithoutSyntheticItalic(c, data);
#endif
}
return data;
}
}
return glyphDataForSystemFallback(c, description, NormalVariant);
}
GlyphData FontCascadeFonts::glyphDataForSystemFallback(UChar32 c, const FontDescription& description, FontVariant variant)
{
// System fallback is character-dependent.
auto& primaryRanges = realizeFallbackRangesAt(description, 0);
auto* originalFont = primaryRanges.fontForCharacter(c);
if (!originalFont)
originalFont = &primaryRanges.fontForFirstRange();
RefPtr<Font> systemFallbackFont = originalFont->systemFallbackFontForCharacter(c, description, m_isForPlatformFont);
if (!systemFallbackFont)
return GlyphData();
if (systemFallbackFont->platformData().orientation() == Vertical && !systemFallbackFont->hasVerticalGlyphs() && FontCascade::isCJKIdeographOrSymbol(c))
variant = BrokenIdeographVariant;
GlyphData fallbackGlyphData;
if (variant == NormalVariant)
fallbackGlyphData = systemFallbackFont->glyphDataForCharacter(c);
else
fallbackGlyphData = systemFallbackFont->variantFont(description, variant)->glyphDataForCharacter(c);
if (fallbackGlyphData.font && fallbackGlyphData.font->platformData().orientation() == Vertical && !fallbackGlyphData.font->isTextOrientationFallback()) {
if (variant == NormalVariant && !FontCascade::isCJKIdeographOrSymbol(c))
fallbackGlyphData = glyphDataForNonCJKCharacterWithGlyphOrientation(c, description.nonCJKGlyphOrientation(), fallbackGlyphData);
#if PLATFORM(COCOA) || USE(CAIRO)
if (fallbackGlyphData.font->platformData().syntheticOblique() && FontCascade::isCJKIdeographOrSymbol(c))
fallbackGlyphData = glyphDataForCJKCharacterWithoutSyntheticItalic(c, fallbackGlyphData);
#endif
}
// Keep the system fallback fonts we use alive.
if (fallbackGlyphData.glyph)
m_systemFallbackFontSet.add(systemFallbackFont.release());
return fallbackGlyphData;
}
