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1 /* | 1 /* |
2 * Copyright (C) 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2012 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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29 */ | 29 */ |
30 | 30 |
31 #ifndef HarfBuzzShaper_h | 31 #ifndef HarfBuzzShaper_h |
32 #define HarfBuzzShaper_h | 32 #define HarfBuzzShaper_h |
33 | 33 |
34 #include "hb.h" | 34 #include "hb.h" |
35 #include "platform/fonts/shaping/Shaper.h" | 35 #include "platform/fonts/shaping/Shaper.h" |
36 #include "platform/geometry/FloatPoint.h" | 36 #include "platform/geometry/FloatPoint.h" |
37 #include "platform/geometry/FloatRect.h" | 37 #include "platform/geometry/FloatRect.h" |
38 #include "platform/text/TextRun.h" | 38 #include "platform/text/TextRun.h" |
39 #include "wtf/Deque.h" | |
39 #include "wtf/HashSet.h" | 40 #include "wtf/HashSet.h" |
40 #include "wtf/OwnPtr.h" | 41 #include "wtf/OwnPtr.h" |
41 #include "wtf/PassOwnPtr.h" | 42 #include "wtf/PassOwnPtr.h" |
42 #include "wtf/Vector.h" | 43 #include "wtf/Vector.h" |
43 #include "wtf/text/CharacterNames.h" | 44 #include "wtf/text/CharacterNames.h" |
44 | 45 |
45 #include <unicode/uscript.h> | 46 #include <unicode/uscript.h> |
46 | 47 |
47 namespace blink { | 48 namespace blink { |
48 | 49 |
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113 | 114 |
114 friend class HarfBuzzShaper; | 115 friend class HarfBuzzShaper; |
115 }; | 116 }; |
116 | 117 |
117 class PLATFORM_EXPORT HarfBuzzShaper final : public Shaper { | 118 class PLATFORM_EXPORT HarfBuzzShaper final : public Shaper { |
118 public: | 119 public: |
119 HarfBuzzShaper(const Font*, const TextRun&); | 120 HarfBuzzShaper(const Font*, const TextRun&); |
120 PassRefPtr<ShapeResult> shapeResult(); | 121 PassRefPtr<ShapeResult> shapeResult(); |
121 ~HarfBuzzShaper() { } | 122 ~HarfBuzzShaper() { } |
122 | 123 |
123 private: | 124 enum HolesQueueItemAction { |
124 struct HarfBuzzRun { | 125 HolesQueueNextFont, |
125 const SimpleFontData* m_fontData; | 126 HolesQueueRange |
126 unsigned m_startIndex; | |
127 size_t m_numCharacters; | |
128 hb_direction_t m_direction; | |
129 hb_script_t m_script; | |
130 }; | 127 }; |
131 | 128 |
129 struct HolesQueueItem { | |
130 HolesQueueItemAction m_action; | |
131 unsigned m_startIndex; | |
132 unsigned m_numCharacters; | |
133 HolesQueueItem(HolesQueueItemAction action, unsigned start, unsigned num ) | |
134 : m_action(action) | |
135 , m_startIndex(start) | |
136 , m_numCharacters(num) {}; | |
137 }; | |
138 | |
139 private: | |
132 float nextExpansionPerOpportunity(); | 140 float nextExpansionPerOpportunity(); |
133 void setExpansion(float); | 141 void setExpansion(float); |
134 void setFontFeatures(); | 142 void setFontFeatures(); |
135 | 143 |
136 bool createHarfBuzzRuns(); | 144 inline bool shapeRange(hb_buffer_t* harfBuzzBuffer, int startIndex, int numC haracters, const SimpleFontData* currentFont, UScriptCode currentRunScript, hb_l anguage_t); |
eae
2015/10/14 08:12:01
How about using unsigned for startIndex and numCha
| |
137 bool createHarfBuzzRunsForSingleCharacter(); | 145 bool extractShapeResults(hb_buffer_t* harfBuzzBuffer, ShapeResult*, Deque<Ha rfBuzzShaper::HolesQueueItem>*, bool& fontCycleQueued, const HolesQueueItem& cur rentQueueItem, const SimpleFontData* currentFont, UScriptCode currentRunScript, bool isLastResort); |
138 PassRefPtr<ShapeResult> shapeHarfBuzzRuns(); | 146 bool buildHint(Vector<UChar32>& hint, bool needsList); |
eae
2015/10/14 08:12:01
This could use a better name or a comment.
| |
139 void shapeResult(ShapeResult*, unsigned, const HarfBuzzRun*, hb_buffer_t*); | 147 |
148 void insertRunIntoShapeResult(ShapeResult*, PassOwnPtr<ShapeResult::RunInfo> runToInsert, int startGlyph, int numGlyphs, int, hb_buffer_t*); | |
140 float adjustSpacing(ShapeResult::RunInfo*, size_t glyphIndex, unsigned curre ntCharacterIndex, float& offsetX, float& totalAdvance); | 149 float adjustSpacing(ShapeResult::RunInfo*, size_t glyphIndex, unsigned curre ntCharacterIndex, float& offsetX, float& totalAdvance); |
141 void addHarfBuzzRun(unsigned startCharacter, unsigned endCharacter, const Si mpleFontData*, UScriptCode); | |
142 | 150 |
143 OwnPtr<UChar[]> m_normalizedBuffer; | 151 OwnPtr<UChar[]> m_normalizedBuffer; |
144 unsigned m_normalizedBufferLength; | 152 unsigned m_normalizedBufferLength; |
145 | 153 |
146 float m_wordSpacingAdjustment; // Delta adjustment (pixels) for each word br eak. | 154 float m_wordSpacingAdjustment; // Delta adjustment (pixels) for each word br eak. |
147 float m_letterSpacing; // Pixels to be added after each glyph. | 155 float m_letterSpacing; // Pixels to be added after each glyph. |
148 unsigned m_expansionOpportunityCount; | 156 unsigned m_expansionOpportunityCount; |
149 | 157 |
150 Vector<hb_feature_t, 4> m_features; | 158 Vector<hb_feature_t, 4> m_features; |
151 Vector<HarfBuzzRun, 16> m_harfBuzzRuns; | 159 Deque<HolesQueueItem> m_holesQueue; |
152 }; | 160 }; |
153 | 161 |
162 | |
154 } // namespace blink | 163 } // namespace blink |
155 | 164 |
156 #endif // HarfBuzzShaper_h | 165 #endif // HarfBuzzShaper_h |
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