| /* |
| * This file is part of the internal font implementation. |
| * |
| * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. |
| * Copyright (c) 2010 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #import "config.h" |
| #import "FontPlatformData.h" |
| |
| #import "SharedBuffer.h" |
| #import <pal/spi/cocoa/CoreTextSPI.h> |
| #import <wtf/text/StringConcatenateNumbers.h> |
| |
| #if PLATFORM(IOS_FAMILY) |
| #import <CoreText/CoreText.h> |
| #import <pal/spi/cg/CoreGraphicsSPI.h> |
| #endif |
| |
| namespace WebCore { |
| |
| // These CoreText Text Spacing feature selectors are not defined in CoreText. |
| enum TextSpacingCTFeatureSelector { TextSpacingProportional, TextSpacingFullWidth, TextSpacingHalfWidth, TextSpacingThirdWidth, TextSpacingQuarterWidth }; |
| |
| FontPlatformData::FontPlatformData(CTFontRef font, float size, bool syntheticBold, bool syntheticOblique, FontOrientation orientation, FontWidthVariant widthVariant, TextRenderingMode textRenderingMode) |
| : FontPlatformData(size, syntheticBold, syntheticOblique, orientation, widthVariant, textRenderingMode) |
| { |
| ASSERT_ARG(font, font); |
| m_font = font; |
| m_isColorBitmapFont = CTFontGetSymbolicTraits(font) & kCTFontTraitColorGlyphs; |
| m_isSystemFont = CTFontDescriptorIsSystemUIFont(adoptCF(CTFontCopyFontDescriptor(m_font.get())).get()); |
| auto variations = adoptCF(static_cast<CFDictionaryRef>(CTFontCopyAttribute(font, kCTFontVariationAttribute))); |
| m_hasVariations = variations && CFDictionaryGetCount(variations.get()); |
| |
| #if PLATFORM(IOS_FAMILY) |
| m_isEmoji = CTFontIsAppleColorEmoji(m_font.get()); |
| #endif |
| } |
| |
| unsigned FontPlatformData::hash() const |
| { |
| uintptr_t flags = static_cast<uintptr_t>(static_cast<unsigned>(m_widthVariant) << 6 |
| | m_isHashTableDeletedValue << 5 |
| | static_cast<unsigned>(m_textRenderingMode) << 3 |
| | static_cast<unsigned>(m_orientation) << 2 |
| | m_syntheticBold << 1 |
| | m_syntheticOblique); |
| |
| uintptr_t fontHash = reinterpret_cast<uintptr_t>(CFHash(m_font.get())); |
| uintptr_t hashCodes[] = { fontHash, flags }; |
| return StringHasher::hashMemory<sizeof(hashCodes)>(hashCodes); |
| } |
| |
| bool FontPlatformData::platformIsEqual(const FontPlatformData& other) const |
| { |
| if (!m_font || !other.m_font) |
| return m_font == other.m_font; |
| return CFEqual(m_font.get(), other.m_font.get()); |
| } |
| |
| CTFontRef FontPlatformData::registeredFont() const |
| { |
| CTFontRef platformFont = font(); |
| ASSERT(platformFont); |
| if (platformFont && adoptCF(CTFontCopyAttribute(platformFont, kCTFontURLAttribute))) |
| return platformFont; |
| return nullptr; |
| } |
| |
| inline int mapFontWidthVariantToCTFeatureSelector(FontWidthVariant variant) |
| { |
| switch(variant) { |
| case FontWidthVariant::RegularWidth: |
| return TextSpacingProportional; |
| |
| case FontWidthVariant::HalfWidth: |
| return TextSpacingHalfWidth; |
| |
| case FontWidthVariant::ThirdWidth: |
| return TextSpacingThirdWidth; |
| |
| case FontWidthVariant::QuarterWidth: |
| return TextSpacingQuarterWidth; |
| } |
| |
| ASSERT_NOT_REACHED(); |
| return TextSpacingProportional; |
| } |
| |
| static CFDictionaryRef cascadeToLastResortAttributesDictionary() |
| { |
| static CFDictionaryRef attributes = nullptr; |
| if (attributes) |
| return attributes; |
| |
| RetainPtr<CTFontDescriptorRef> lastResort = adoptCF(CTFontDescriptorCreateWithNameAndSize(CFSTR("LastResort"), 0)); |
| |
| CFTypeRef descriptors[] = { lastResort.get() }; |
| RetainPtr<CFArrayRef> array = adoptCF(CFArrayCreate(kCFAllocatorDefault, descriptors, WTF_ARRAY_LENGTH(descriptors), &kCFTypeArrayCallBacks)); |
| |
| CFTypeRef keys[] = { kCTFontCascadeListAttribute }; |
| CFTypeRef values[] = { array.get() }; |
| attributes = CFDictionaryCreate(kCFAllocatorDefault, keys, values, WTF_ARRAY_LENGTH(keys), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); |
| |
| return attributes; |
| } |
| |
| static RetainPtr<CTFontDescriptorRef> cascadeToLastResortAndVariationsFontDescriptor(CTFontRef originalFont) |
| { |
| // FIXME: Remove this when <rdar://problem/28449441> is fixed. NOTE: That radar was fixed 11/16/16, so this can be removed. TBD. |
| #define WORKAROUND_CORETEXT_VARIATIONS_WITH_FALLBACK_LIST_BUG (ENABLE(VARIATION_FONTS) && (PLATFORM(IOS_FAMILY) && __IPHONE_OS_VERSION_MIN_REQUIRED < 110000)) |
| |
| CFDictionaryRef attributes = cascadeToLastResortAttributesDictionary(); |
| #if WORKAROUND_CORETEXT_VARIATIONS_WITH_FALLBACK_LIST_BUG |
| auto variations = adoptCF(static_cast<CFDictionaryRef>(CTFontCopyAttribute(originalFont, kCTFontVariationAttribute))); |
| if (!variations || !CFDictionaryGetCount(variations.get()) || CTFontDescriptorIsSystemUIFont(adoptCF(CTFontCopyFontDescriptor(originalFont)).get())) |
| #endif |
| { |
| UNUSED_PARAM(originalFont); |
| |
| static CTFontDescriptorRef descriptor = nullptr; |
| if (descriptor) |
| return descriptor; |
| |
| descriptor = CTFontDescriptorCreateWithAttributes(attributes); |
| return descriptor; |
| } |
| #if WORKAROUND_CORETEXT_VARIATIONS_WITH_FALLBACK_LIST_BUG |
| auto mutableAttributes = adoptCF(CFDictionaryCreateMutableCopy(kCFAllocatorDefault, 2, attributes)); |
| CFDictionaryAddValue(mutableAttributes.get(), kCTFontVariationAttribute, variations.get()); |
| return adoptCF(CTFontDescriptorCreateWithAttributes(mutableAttributes.get())); |
| #endif |
| #undef WORKAROUND_CORETEXT_VARIATIONS_WITH_FALLBACK_LIST_BUG |
| } |
| |
| CTFontRef FontPlatformData::ctFont() const |
| { |
| if (m_ctFont) |
| return m_ctFont.get(); |
| |
| ASSERT(m_font); |
| m_ctFont = adoptCF(CTFontCreateCopyWithAttributes(m_font.get(), m_size, nullptr, cascadeToLastResortAndVariationsFontDescriptor(m_font.get()).get())); |
| |
| if (m_widthVariant != FontWidthVariant::RegularWidth) { |
| int featureTypeValue = kTextSpacingType; |
| int featureSelectorValue = mapFontWidthVariantToCTFeatureSelector(m_widthVariant); |
| RetainPtr<CTFontDescriptorRef> sourceDescriptor = adoptCF(CTFontCopyFontDescriptor(m_ctFont.get())); |
| RetainPtr<CFNumberRef> featureType = adoptCF(CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &featureTypeValue)); |
| RetainPtr<CFNumberRef> featureSelector = adoptCF(CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &featureSelectorValue)); |
| RetainPtr<CTFontDescriptorRef> newDescriptor = adoptCF(CTFontDescriptorCreateCopyWithFeature(sourceDescriptor.get(), featureType.get(), featureSelector.get())); |
| RetainPtr<CTFontRef> newFont = adoptCF(CTFontCreateWithFontDescriptor(newDescriptor.get(), m_size, 0)); |
| |
| if (newFont) |
| m_ctFont = newFont; |
| } |
| |
| return m_ctFont.get(); |
| } |
| |
| RetainPtr<CFTypeRef> FontPlatformData::objectForEqualityCheck(CTFontRef ctFont) |
| { |
| auto fontDescriptor = adoptCF(CTFontCopyFontDescriptor(ctFont)); |
| // FIXME: https://bugs.webkit.org/show_bug.cgi?id=138683 This is a shallow pointer compare for web fonts |
| // because the URL contains the address of the font. This means we might erroneously get false negatives. |
| RetainPtr<CFURLRef> url = adoptCF(static_cast<CFURLRef>(CTFontDescriptorCopyAttribute(fontDescriptor.get(), kCTFontReferenceURLAttribute))); |
| ASSERT(!url || CFGetTypeID(url.get()) == CFURLGetTypeID()); |
| return url; |
| } |
| |
| RetainPtr<CFTypeRef> FontPlatformData::objectForEqualityCheck() const |
| { |
| return objectForEqualityCheck(ctFont()); |
| } |
| |
| RefPtr<SharedBuffer> FontPlatformData::openTypeTable(uint32_t table) const |
| { |
| if (RetainPtr<CFDataRef> data = adoptCF(CTFontCopyTable(font(), table, kCTFontTableOptionNoOptions))) |
| return SharedBuffer::create(data.get()); |
| |
| return nullptr; |
| } |
| |
| #if !LOG_DISABLED |
| |
| String FontPlatformData::description() const |
| { |
| String fontDescription { adoptCF(CFCopyDescription(font())).get() }; |
| return makeString(fontDescription, ' ', m_size, |
| (m_syntheticBold ? " synthetic bold" : ""), |
| (m_syntheticOblique ? " synthetic oblique" : ""), |
| (m_orientation == FontOrientation::Vertical ? " vertical orientation" : "")); |
| } |
| |
| #endif |
| |
| } // namespace WebCore |