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::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 (variant == NormalVariant && fallbackGlyphData.font) { if (!FontCascade::isCJKIdeographOrSymbol(c) && fallbackGlyphData.font->platformData().orientation() == Vertical && !fallbackGlyphData.font->isTextOrientationFallback()) fallbackGlyphData = glyphDataForNonCJKCharacterWithGlyphOrientation(c, description.nonCJKGlyphOrientation(), fallbackGlyphData); } // Keep the system fallback fonts we use alive. if (fallbackGlyphData.glyph) m_systemFallbackFontSet.add(systemFallbackFont.release()); return fallbackGlyphData; }
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; }
void FontCascadeFonts::determinePitch(const FontDescription& description) { auto& primaryRanges = realizeFallbackRangesAt(description, 0); unsigned numRanges = primaryRanges.size(); if (numRanges == 1) m_pitch = primaryRanges.rangeAt(0).font().pitch(); else m_pitch = VariablePitch; }
GlyphData FontCascadeFonts::glyphDataForVariant(UChar32 c, const FontCascadeDescription& description, FontVariant variant, unsigned fallbackIndex) { while (true) { auto& fontRanges = realizeFallbackRangesAt(description, fallbackIndex++); if (fontRanges.isNull()) break; GlyphData data = fontRanges.glyphDataForCharacter(c); if (!data.font) continue; // The variantFont function should not normally return 0. // But if it does, we will just render the capital letter big. if (const Font* variantFont = data.font->variantFont(description, variant)) return variantFont->glyphDataForCharacter(c); return data; } return glyphDataForSystemFallback(c, description, variant); }