| OLD | NEW |
|---|
| (Empty) |
| 1 /* | |
| 2 * Copyright (C) 2006, 2009 Apple 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 in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
| 14 * its contributors may be used to endorse or promote products derived | |
| 15 * from this software without specific prior written permission. | |
| 16 * | |
| 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
| 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
| 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #ifndef GlyphMetricsMap_h | |
| 30 #define GlyphMetricsMap_h | |
| 31 | |
| 32 #include "platform/fonts/Glyph.h" | |
| 33 #include "platform/geometry/FloatRect.h" | |
| 34 #include "wtf/Assertions.h" | |
| 35 #include "wtf/HashMap.h" | |
| 36 #include "wtf/OwnPtr.h" | |
| 37 #include "wtf/PassOwnPtr.h" | |
| 38 #include "wtf/unicode/Unicode.h" | |
| 39 | |
| 40 namespace WebCore { | |
| 41 | |
| 42 const float cGlyphSizeUnknown = -1; | |
| 43 | |
| 44 template<class T> class GlyphMetricsMap { | |
| 45 WTF_MAKE_NONCOPYABLE(GlyphMetricsMap); | |
| 46 public: | |
| 47 GlyphMetricsMap() : m_filledPrimaryPage(false) { } | |
| 48 T metricsForGlyph(Glyph glyph) | |
| 49 { | |
| 50 return locatePage(glyph / GlyphMetricsPage::size)->metricsForGlyph(glyph
); | |
| 51 } | |
| 52 | |
| 53 void setMetricsForGlyph(Glyph glyph, const T& metrics) | |
| 54 { | |
| 55 locatePage(glyph / GlyphMetricsPage::size)->setMetricsForGlyph(glyph, me
trics); | |
| 56 } | |
| 57 | |
| 58 private: | |
| 59 class GlyphMetricsPage { | |
| 60 public: | |
| 61 static const size_t size = 256; // Usually covers Latin-1 in a single pa
ge. | |
| 62 | |
| 63 T metricsForGlyph(Glyph glyph) const { return m_metrics[glyph % size]; } | |
| 64 void setMetricsForGlyph(Glyph glyph, const T& metrics) | |
| 65 { | |
| 66 setMetricsForIndex(glyph % size, metrics); | |
| 67 } | |
| 68 void setMetricsForIndex(unsigned index, const T& metrics) | |
| 69 { | |
| 70 ASSERT_WITH_SECURITY_IMPLICATION(index < size); | |
| 71 m_metrics[index] = metrics; | |
| 72 } | |
| 73 | |
| 74 private: | |
| 75 T m_metrics[size]; | |
| 76 }; | |
| 77 | |
| 78 GlyphMetricsPage* locatePage(unsigned pageNumber) | |
| 79 { | |
| 80 if (!pageNumber && m_filledPrimaryPage) | |
| 81 return &m_primaryPage; | |
| 82 return locatePageSlowCase(pageNumber); | |
| 83 } | |
| 84 | |
| 85 GlyphMetricsPage* locatePageSlowCase(unsigned pageNumber); | |
| 86 | |
| 87 static T unknownMetrics(); | |
| 88 | |
| 89 bool m_filledPrimaryPage; | |
| 90 GlyphMetricsPage m_primaryPage; // We optimize for the page that contains gl
yph indices 0-255. | |
| 91 OwnPtr<HashMap<int, OwnPtr<GlyphMetricsPage> > > m_pages; | |
| 92 }; | |
| 93 | |
| 94 template<> inline float GlyphMetricsMap<float>::unknownMetrics() | |
| 95 { | |
| 96 return cGlyphSizeUnknown; | |
| 97 } | |
| 98 | |
| 99 template<> inline FloatRect GlyphMetricsMap<FloatRect>::unknownMetrics() | |
| 100 { | |
| 101 return FloatRect(0, 0, cGlyphSizeUnknown, cGlyphSizeUnknown); | |
| 102 } | |
| 103 | |
| 104 template<class T> typename GlyphMetricsMap<T>::GlyphMetricsPage* GlyphMetricsMap
<T>::locatePageSlowCase(unsigned pageNumber) | |
| 105 { | |
| 106 GlyphMetricsPage* page; | |
| 107 if (!pageNumber) { | |
| 108 ASSERT(!m_filledPrimaryPage); | |
| 109 page = &m_primaryPage; | |
| 110 m_filledPrimaryPage = true; | |
| 111 } else { | |
| 112 if (m_pages) { | |
| 113 if ((page = m_pages->get(pageNumber))) | |
| 114 return page; | |
| 115 } else | |
| 116 m_pages = adoptPtr(new HashMap<int, OwnPtr<GlyphMetricsPage> >); | |
| 117 page = new GlyphMetricsPage; | |
| 118 m_pages->set(pageNumber, adoptPtr(page)); | |
| 119 } | |
| 120 | |
| 121 // Fill in the whole page with the unknown glyph information. | |
| 122 for (unsigned i = 0; i < GlyphMetricsPage::size; i++) | |
| 123 page->setMetricsForIndex(i, unknownMetrics()); | |
| 124 | |
| 125 return page; | |
| 126 } | |
| 127 | |
| 128 } // namespace WebCore | |
| 129 | |
| 130 #endif | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 52773004:
Move Glyph related classes to platform/fonts (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master