| /* |
| * Copyright (C) 2017-2021 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "FontFamilySpecificationCoreText.h" |
| |
| #include "FontCache.h" |
| #include "FontSelector.h" |
| #include <pal/spi/cf/CoreTextSPI.h> |
| #include <wtf/HashFunctions.h> |
| #include <wtf/HashMap.h> |
| |
| #include <CoreText/CoreText.h> |
| |
| namespace WebCore { |
| |
| struct FontFamilySpecificationKey { |
| RetainPtr<CTFontDescriptorRef> fontDescriptor; |
| FontDescriptionKey fontDescriptionKey; |
| |
| FontFamilySpecificationKey() = default; |
| |
| FontFamilySpecificationKey(CTFontDescriptorRef fontDescriptor, const FontDescription& fontDescription) |
| : fontDescriptor(fontDescriptor) |
| , fontDescriptionKey(fontDescription) |
| { } |
| |
| explicit FontFamilySpecificationKey(WTF::HashTableDeletedValueType deletedValue) |
| : fontDescriptionKey(deletedValue) |
| { } |
| |
| bool operator==(const FontFamilySpecificationKey& other) const |
| { |
| return safeCFEqual(fontDescriptor.get(), other.fontDescriptor.get()) && fontDescriptionKey == other.fontDescriptionKey; |
| } |
| |
| bool operator!=(const FontFamilySpecificationKey& other) const |
| { |
| return !(*this == other); |
| } |
| |
| bool isHashTableDeletedValue() const { return fontDescriptionKey.isHashTableDeletedValue(); } |
| }; |
| |
| inline void add(Hasher& hasher, const FontFamilySpecificationKey& key) |
| { |
| // FIXME: Ideally, we wouldn't be hashing a hash. |
| add(hasher, safeCFHash(key.fontDescriptor.get()), key.fontDescriptionKey); |
| } |
| |
| struct FontFamilySpecificationKeyHash { |
| static unsigned hash(const FontFamilySpecificationKey& key) { return computeHash(key); } |
| static bool equal(const FontFamilySpecificationKey& a, const FontFamilySpecificationKey& b) { return a == b; } |
| static const bool safeToCompareToEmptyOrDeleted = true; |
| }; |
| |
| using FontMap = HashMap<FontFamilySpecificationKey, std::unique_ptr<FontPlatformData>, FontFamilySpecificationKeyHash, SimpleClassHashTraits<FontFamilySpecificationKey>>; |
| |
| static FontMap& fontMap() |
| { |
| static NeverDestroyed<FontMap> fontMap; |
| return fontMap; |
| } |
| |
| void clearFontFamilySpecificationCoreTextCache() |
| { |
| fontMap().clear(); |
| } |
| |
| FontFamilySpecificationCoreText::FontFamilySpecificationCoreText(CTFontDescriptorRef fontDescriptor) |
| : m_fontDescriptor(fontDescriptor) |
| { |
| } |
| |
| FontFamilySpecificationCoreText::~FontFamilySpecificationCoreText() = default; |
| |
| FontRanges FontFamilySpecificationCoreText::fontRanges(const FontDescription& fontDescription) const |
| { |
| auto& fontPlatformData = fontMap().ensure(FontFamilySpecificationKey(m_fontDescriptor.get(), fontDescription), [&] () { |
| auto size = fontDescription.computedSize(); |
| |
| auto font = adoptCF(CTFontCreateWithFontDescriptor(m_fontDescriptor.get(), size, nullptr)); |
| |
| font = preparePlatformFont(font.get(), fontDescription, { }); |
| |
| auto [syntheticBold, syntheticOblique] = computeNecessarySynthesis(font.get(), fontDescription, ShouldComputePhysicalTraits::Yes).boldObliquePair(); |
| |
| return makeUnique<FontPlatformData>(font.get(), size, false, syntheticOblique, fontDescription.orientation(), fontDescription.widthVariant(), fontDescription.textRenderingMode()); |
| }).iterator->value; |
| |
| ASSERT(fontPlatformData); |
| |
| return FontRanges(FontCache::forCurrentThread().fontForPlatformData(*fontPlatformData)); |
| } |
| |
| } |