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Side by Side Diff: Source/WebCore/platform/graphics/chromium/ComplexTextControllerLinux.h

Issue 6471009: Merge 76732 (Closed) Base URL: http://svn.webkit.org/repository/webkit/branches/chromium/648/
Patch Set: Created 9 years, 10 months ago
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1 /* 1 /*
2 * Copyright (c) 2010 Google Inc. All rights reserved. 2 * Copyright (c) 2010 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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104 const unsigned width() const { return m_pixelWidth; } 104 const unsigned width() const { return m_pixelWidth; }
105 105
106 // Return the cluster log for the current script run. For example: 106 // Return the cluster log for the current script run. For example:
107 // script run: f i a n c é (fi gets ligatured) 107 // script run: f i a n c é (fi gets ligatured)
108 // log clutrs: 0 0 1 2 3 4 108 // log clutrs: 0 0 1 2 3 4
109 // So, for each input code point, the log tells you which output glyph was 109 // So, for each input code point, the log tells you which output glyph was
110 // generated for it. 110 // generated for it.
111 const unsigned short* logClusters() const { return m_item.log_clusters; } 111 const unsigned short* logClusters() const { return m_item.log_clusters; }
112 112
113 // return the number of code points in the current script run 113 // return the number of code points in the current script run
114 const unsigned numCodePoints() const { return m_numCodePoints; } 114 const unsigned numCodePoints() const { return m_item.item.length; }
115 115
116 // Return the current pixel position of the controller. 116 // Return the current pixel position of the controller.
117 const unsigned offsetX() const { return m_offsetX; } 117 const unsigned offsetX() const { return m_offsetX; }
118 118
119 const FontPlatformData* fontPlatformDataForScriptRun() { return reinterpret_ cast<FontPlatformData*>(m_item.font->userData); } 119 const FontPlatformData* fontPlatformDataForScriptRun() { return reinterpret_ cast<FontPlatformData*>(m_item.font->userData); }
120 120
121 private: 121 private:
122 void setupFontForScriptRun(); 122 void setupFontForScriptRun();
123 HB_FontRec* allocHarfbuzzFont(); 123 HB_FontRec* allocHarfbuzzFont();
124 void deleteGlyphArrays(); 124 void deleteGlyphArrays();
125 void createGlyphArrays(int); 125 void createGlyphArrays(int);
126 void resetGlyphArrays(); 126 void resetGlyphArrays();
127 void shapeGlyphs(); 127 void shapeGlyphs();
128 void setGlyphXPositions(bool); 128 void setGlyphXPositions(bool);
129 129
130 static void normalizeSpacesAndMirrorChars(const UChar* source, bool rtl, UCh ar* destination, int length); 130 static void normalizeSpacesAndMirrorChars(const UChar* source, bool rtl, UCh ar* destination, int length);
131 static const TextRun& getNormalizedTextRun(const TextRun& originalRun, OwnPt r<TextRun>& normalizedRun, OwnArrayPtr<UChar>& normalizedBuffer); 131 static const TextRun& getNormalizedTextRun(const TextRun& originalRun, OwnPt r<TextRun>& normalizedRun, OwnArrayPtr<UChar>& normalizedBuffer);
132 132
133 // This matches the logic in RenderBlock::findNextLineBreak 133 // This matches the logic in RenderBlock::findNextLineBreak
134 static bool isCodepointSpace(HB_UChar16 c) { return c == ' ' || c == '\t'; } 134 static bool isCodepointSpace(HB_UChar16 c) { return c == ' ' || c == '\t'; }
135 135
136 const Font* const m_font; 136 const Font* const m_font;
137 const SimpleFontData* m_currentFontData; 137 const SimpleFontData* m_currentFontData;
138 HB_ShaperItem m_item; 138 HB_ShaperItem m_item;
139 uint16_t* m_glyphs16; // A vector of 16-bit glyph ids. 139 uint16_t* m_glyphs16; // A vector of 16-bit glyph ids.
140 SkScalar* m_xPositions; // A vector of x positions for each glyph. 140 SkScalar* m_xPositions; // A vector of x positions for each glyph.
141 ssize_t m_indexOfNextScriptRun; // Indexes the script run in |m_run|. 141 ssize_t m_indexOfNextScriptRun; // Indexes the script run in |m_run|.
142 unsigned m_offsetX; // Offset in pixels to the start of the next script run. 142 unsigned m_offsetX; // Offset in pixels to the start of the next script run.
143 unsigned m_pixelWidth; // Width (in px) of the current script run. 143 unsigned m_pixelWidth; // Width (in px) of the current script run.
144 unsigned m_numCodePoints; // Code points in current script run.
145 unsigned m_glyphsArrayCapacity; // Current size of all the Harfbuzz arrays. 144 unsigned m_glyphsArrayCapacity; // Current size of all the Harfbuzz arrays.
146 145
147 OwnPtr<TextRun> m_normalizedRun; 146 OwnPtr<TextRun> m_normalizedRun;
148 OwnArrayPtr<UChar> m_normalizedBuffer; // A buffer for normalized run. 147 OwnArrayPtr<UChar> m_normalizedBuffer; // A buffer for normalized run.
149 const TextRun& m_run; 148 const TextRun& m_run;
150 int m_wordSpacingAdjustment; // delta adjustment (pixels) for each word brea k. 149 int m_wordSpacingAdjustment; // delta adjustment (pixels) for each word brea k.
151 float m_padding; // pixels to be distributed over the line at word breaks. 150 float m_padding; // pixels to be distributed over the line at word breaks.
152 float m_padPerWordBreak; // pixels to be added to each word break. 151 float m_padPerWordBreak; // pixels to be added to each word break.
153 float m_padError; // |m_padPerWordBreak| might have a fractional component. 152 float m_padError; // |m_padPerWordBreak| might have a fractional component.
154 // Since we only add a whole number of padding pixels at 153 // Since we only add a whole number of padding pixels at
155 // each word break we accumulate error. This is the 154 // each word break we accumulate error. This is the
156 // number of pixels that we are behind so far. 155 // number of pixels that we are behind so far.
157 int m_letterSpacing; // pixels to be added after each glyph. 156 int m_letterSpacing; // pixels to be added after each glyph.
158 }; 157 };
159 158
160 } // namespace WebCore 159 } // namespace WebCore
161 160
162 #endif // ComplexTextControllerLinux_h 161 #endif // ComplexTextControllerLinux_h
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