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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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46 class Font; | 46 class Font; |
47 class SimpleFontData; | 47 class SimpleFontData; |
48 | 48 |
49 class HarfBuzzShaper FINAL { | 49 class HarfBuzzShaper FINAL { |
50 public: | 50 public: |
51 enum NormalizeMode { | 51 enum NormalizeMode { |
52 DoNotNormalizeMirrorChars, | 52 DoNotNormalizeMirrorChars, |
53 NormalizeMirrorChars | 53 NormalizeMirrorChars |
54 }; | 54 }; |
55 | 55 |
56 HarfBuzzShaper(const Font*, const TextRun&); | 56 enum ForTextEmphasisOrNot { |
57 NotForTextEmphasis, | |
58 ForTextEmphasis | |
59 }; | |
60 | |
61 HarfBuzzShaper(const Font*, const TextRun&, bool forTextEmphasis = false); | |
leviw_travelin_and_unemployed
2014/02/13 01:07:56
Don't you want to use the enum you defined above,
| |
57 | 62 |
58 void setDrawRange(int from, int to); | 63 void setDrawRange(int from, int to); |
59 bool shape(GlyphBuffer* = 0); | 64 bool shape(GlyphBuffer* = 0); |
60 FloatPoint adjustStartPoint(const FloatPoint&); | 65 FloatPoint adjustStartPoint(const FloatPoint&); |
61 float totalWidth() { return m_totalWidth; } | 66 float totalWidth() { return m_totalWidth; } |
62 int offsetForPosition(float targetX); | 67 int offsetForPosition(float targetX); |
63 FloatRect selectionRect(const FloatPoint&, int height, int from, int to); | 68 FloatRect selectionRect(const FloatPoint&, int height, int from, int to); |
64 | 69 |
65 private: | 70 private: |
66 class HarfBuzzRun { | 71 class HarfBuzzRun { |
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126 | 131 |
127 // In complex text word-spacing affects each line-break, space (U+0020) and non-breaking space (U+00A0). | 132 // In complex text word-spacing affects each line-break, space (U+0020) and non-breaking space (U+00A0). |
128 static bool isCodepointSpace(UChar c) { return c == ' ' || c == noBreakSpace || c == '\n'; } | 133 static bool isCodepointSpace(UChar c) { return c == ' ' || c == noBreakSpace || c == '\n'; } |
129 | 134 |
130 void setFontFeatures(); | 135 void setFontFeatures(); |
131 | 136 |
132 bool createHarfBuzzRuns(); | 137 bool createHarfBuzzRuns(); |
133 bool shapeHarfBuzzRuns(); | 138 bool shapeHarfBuzzRuns(); |
134 bool fillGlyphBuffer(GlyphBuffer*); | 139 bool fillGlyphBuffer(GlyphBuffer*); |
135 void fillGlyphBufferFromHarfBuzzRun(GlyphBuffer*, HarfBuzzRun*, FloatPoint& firstOffsetOfNextRun); | 140 void fillGlyphBufferFromHarfBuzzRun(GlyphBuffer*, HarfBuzzRun*, FloatPoint& firstOffsetOfNextRun); |
141 void fillGlyphBufferForTextEmphasis(GlyphBuffer*, HarfBuzzRun* currentRun); | |
136 void setGlyphPositionsForHarfBuzzRun(HarfBuzzRun*, hb_buffer_t*); | 142 void setGlyphPositionsForHarfBuzzRun(HarfBuzzRun*, hb_buffer_t*); |
137 void addHarfBuzzRun(unsigned startCharacter, unsigned endCharacter, const Si mpleFontData*, UScriptCode); | 143 void addHarfBuzzRun(unsigned startCharacter, unsigned endCharacter, const Si mpleFontData*, UScriptCode); |
138 | 144 |
139 GlyphBufferAdvance createGlyphBufferAdvance(float, float); | 145 GlyphBufferAdvance createGlyphBufferAdvance(float, float); |
140 | 146 |
141 const Font* m_font; | 147 const Font* m_font; |
142 OwnPtr<UChar[]> m_normalizedBuffer; | 148 OwnPtr<UChar[]> m_normalizedBuffer; |
143 unsigned m_normalizedBufferLength; | 149 unsigned m_normalizedBufferLength; |
144 const TextRun& m_run; | 150 const TextRun& m_run; |
145 | 151 |
146 float m_wordSpacingAdjustment; // Delta adjustment (pixels) for each word br eak. | 152 float m_wordSpacingAdjustment; // Delta adjustment (pixels) for each word br eak. |
147 float m_padding; // Pixels to be distributed over the line at word breaks. | 153 float m_padding; // Pixels to be distributed over the line at word breaks. |
148 float m_padPerWordBreak; // Pixels to be added to each word break. | 154 float m_padPerWordBreak; // Pixels to be added to each word break. |
149 float m_padError; // m_padPerWordBreak might have a fractional component. Si nce we only add a whole number of padding pixels at each word break we accumulat e error. This is the number of pixels that we are behind so far. | 155 float m_padError; // m_padPerWordBreak might have a fractional component. Si nce we only add a whole number of padding pixels at each word break we accumulat e error. This is the number of pixels that we are behind so far. |
150 float m_letterSpacing; // Pixels to be added after each glyph. | 156 float m_letterSpacing; // Pixels to be added after each glyph. |
151 | 157 |
152 Vector<hb_feature_t, 4> m_features; | 158 Vector<hb_feature_t, 4> m_features; |
153 Vector<OwnPtr<HarfBuzzRun>, 16> m_harfBuzzRuns; | 159 Vector<OwnPtr<HarfBuzzRun>, 16> m_harfBuzzRuns; |
154 | 160 |
155 FloatPoint m_startOffset; | 161 FloatPoint m_startOffset; |
156 | 162 |
157 int m_fromIndex; | 163 int m_fromIndex; |
158 int m_toIndex; | 164 int m_toIndex; |
159 | 165 |
166 bool m_forTextEmphasis; | |
167 | |
160 float m_totalWidth; | 168 float m_totalWidth; |
161 | 169 |
162 friend struct CachedShapingResults; | 170 friend struct CachedShapingResults; |
163 }; | 171 }; |
164 | 172 |
165 } // namespace WebCore | 173 } // namespace WebCore |
166 | 174 |
167 #endif // HarfBuzzShaper_h | 175 #endif // HarfBuzzShaper_h |
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