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::glyphDataForCharacter(UChar32 c, const FontDescription& description, FontVariant variant) { ASSERT(isMainThread()); ASSERT(variant != AutoVariant); if (variant != NormalVariant) return glyphDataForVariant(c, description, variant, 0); const unsigned pageNumber = c / GlyphPage::size; RefPtr<GlyphPage>& cachedPage = pageNumber ? m_cachedPages.add(pageNumber, nullptr).iterator->value : m_cachedPageZero; if (!cachedPage) cachedPage = glyphPageFromFontRanges(pageNumber, realizeFallbackRangesAt(description, 0)); GlyphData glyphData = cachedPage ? cachedPage->glyphDataForCharacter(c) : GlyphData(); if (!glyphData.glyph) { if (!cachedPage) cachedPage = GlyphPage::createForMixedFonts(); else if (cachedPage->isImmutable()) cachedPage = GlyphPage::createCopyForMixedFonts(*cachedPage); glyphData = glyphDataForNormalVariant(c, description); cachedPage->setGlyphDataForCharacter(c, glyphData.glyph, glyphData.font); } return glyphData; }
GlyphData FontCascadeFonts::glyphDataForCharacter(UChar32 c, const FontCascadeDescription& description, FontVariant variant) { ASSERT(isMainThread()); ASSERT(variant != AutoVariant); if (variant != NormalVariant) return glyphDataForVariant(c, description, variant, 0); const unsigned pageNumber = c / GlyphPage::size; auto& cacheEntry = pageNumber ? m_cachedPages.add(pageNumber, GlyphPageCacheEntry()).iterator->value : m_cachedPageZero; // Initialize cache with a full page of glyph mappings from a single font. if (cacheEntry.isNull()) cacheEntry.setSingleFontPage(glyphPageFromFontRanges(pageNumber, realizeFallbackRangesAt(description, 0))); GlyphData glyphData = cacheEntry.glyphDataForCharacter(c); if (!glyphData.glyph) { // No glyph, resolve per-character. glyphData = glyphDataForNormalVariant(c, description); // Cache the results. cacheEntry.setGlyphDataForCharacter(c, glyphData); } return glyphData; }