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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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