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| 1 /* | |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * 3. Neither the name of Google Inc. nor the names of its contributors | |
| 15 * may be used to endorse or promote products derived from this | |
| 16 * software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #ifndef FontCacheKey_h | |
| 32 #define FontCacheKey_h | |
| 33 | |
| 34 #include "wtf/HashMap.h" | |
| 35 #include "wtf/HashTableDeletedValueType.h" | |
| 36 #include "wtf/text/AtomicStringHash.h" | |
| 37 #include "wtf/text/StringHash.h" | |
| 38 | |
| 39 namespace WebCore { | |
| 40 | |
| 41 // Multiplying the floating point size by 100 gives two decimal point | |
| 42 // precision which should be sufficient. | |
| 43 static const unsigned s_fontSizePrecisionMultiplier = 100; | |
| 44 | |
| 45 struct FontCacheKey { | |
| 46 WTF_MAKE_FAST_ALLOCATED; | |
| 47 public: | |
| 48 FontCacheKey() | |
| 49 : m_familyName() | |
| 50 , m_fontSize(0) | |
| 51 , m_options(0) { } | |
| 52 FontCacheKey(AtomicString familyName, float fontSize, unsigned options) | |
| 53 : m_familyName(familyName) | |
| 54 , m_fontSize(fontSize * s_fontSizePrecisionMultiplier) | |
| 55 , m_options(options) { } | |
| 56 FontCacheKey(WTF::HashTableDeletedValueType) | |
| 57 : m_fontSize(hashTableDeletedSize()) { } | |
| 58 | |
| 59 void setSynthetic(bool bold, bool italic) | |
| 60 { | |
| 61 m_options |= (bold ? 1 << 6 : 0) | (italic ? 1 << 7 : 0); | |
| 62 } | |
| 63 | |
| 64 unsigned hash() const | |
| 65 { | |
| 66 unsigned hashCodes[3] = { | |
| 67 CaseFoldingHash::hash(m_familyName), | |
| 68 m_fontSize, | |
| 69 m_options | |
| 70 }; | |
| 71 return StringHasher::hashMemory<sizeof(hashCodes)>(hashCodes); | |
| 72 } | |
| 73 | |
| 74 bool operator==(const FontCacheKey& other) const | |
| 75 { | |
| 76 return equalIgnoringCase(m_familyName, other.m_familyName) | |
| 77 && m_fontSize == other.m_fontSize | |
| 78 && m_options == other.m_options; | |
| 79 } | |
| 80 | |
| 81 bool isHashTableDeletedValue() const | |
| 82 { | |
| 83 return m_fontSize == hashTableDeletedSize(); | |
| 84 } | |
| 85 | |
| 86 private: | |
| 87 static unsigned hashTableDeletedSize() | |
| 88 { | |
| 89 return 0xFFFFFFFFU; | |
| 90 } | |
| 91 | |
| 92 AtomicString m_familyName; | |
| 93 unsigned m_fontSize; | |
| 94 unsigned m_options; | |
| 95 }; | |
| 96 | |
| 97 struct FontCacheKeyHash { | |
| 98 static unsigned hash(const FontCacheKey& key) | |
| 99 { | |
| 100 return key.hash(); | |
| 101 } | |
| 102 | |
| 103 static bool equal(const FontCacheKey& a, const FontCacheKey& b) | |
| 104 { | |
| 105 return a == b; | |
| 106 } | |
| 107 | |
| 108 static const bool safeToCompareToEmptyOrDeleted = true; | |
| 109 }; | |
| 110 | |
| 111 struct FontCacheKeyTraits : WTF::SimpleClassHashTraits<FontCacheKey> { }; | |
| 112 | |
| 113 } | |
| 114 | |
| 115 #endif // FontCacheKey_h | |
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Chromium Code Reviews
Issue 48113009:
Move Font related classes to Source/platform/fonts (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master