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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkGlyph_DEFINED | 8 #ifndef SkGlyph_DEFINED |
9 #define SkGlyph_DEFINED | 9 #define SkGlyph_DEFINED |
10 | 10 |
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27 enum { | 27 enum { |
28 kSubBits = 2, | 28 kSubBits = 2, |
29 kSubMask = ((1 << kSubBits) - 1), | 29 kSubMask = ((1 << kSubBits) - 1), |
30 kSubShift = 24, // must be large enough for glyphs and unichars | 30 kSubShift = 24, // must be large enough for glyphs and unichars |
31 kCodeMask = ((1 << kSubShift) - 1), | 31 kCodeMask = ((1 << kSubShift) - 1), |
32 // relative offsets for X and Y subpixel bits | 32 // relative offsets for X and Y subpixel bits |
33 kSubShiftX = kSubBits, | 33 kSubShiftX = kSubBits, |
34 kSubShiftY = 0 | 34 kSubShiftY = 0 |
35 }; | 35 }; |
36 | 36 |
37 public: | 37 // Support horizontal and vertical skipping strike-through / underlines. |
| 38 // The caller walks the linked list looking for a match. For a horizontal un
derline, |
| 39 // the fBounds contains the top and bottom of the underline. The fInterval p
air contains the |
| 40 // beginning and end of of the intersection of the bounds and the glyph's pa
th. |
| 41 // If interval[0] >= interval[1], no intesection was found. |
| 42 struct Intercept { |
| 43 Intercept* fNext; |
| 44 SkScalar fBounds[2]; // for horz underlines, the boundaries in Y |
| 45 SkScalar fInterval[2]; // the outside intersections of the axis and t
he glyph |
| 46 }; |
| 47 |
| 48 struct PathData { |
| 49 Intercept* fIntercept; |
| 50 SkPath* fPath; |
| 51 }; |
| 52 |
| 53 public: |
38 static const SkFixed kSubpixelRound = SK_FixedHalf >> SkGlyph::kSubBits; | 54 static const SkFixed kSubpixelRound = SK_FixedHalf >> SkGlyph::kSubBits; |
39 // A value that can never be generated by MakeID. | 55 // A value that can never be generated by MakeID. |
40 static const uint32_t kImpossibleID = ~0; | 56 static const uint32_t kImpossibleID = ~0; |
41 void* fImage; | 57 void* fImage; |
42 SkPath* fPath; | 58 PathData* fPathData; |
43 SkFixed fAdvanceX, fAdvanceY; | 59 SkFixed fAdvanceX, fAdvanceY; |
44 | 60 |
45 uint16_t fWidth, fHeight; | 61 uint16_t fWidth, fHeight; |
46 int16_t fTop, fLeft; | 62 int16_t fTop, fLeft; |
47 | 63 |
48 uint8_t fMaskFormat; | 64 uint8_t fMaskFormat; |
49 int8_t fRsbDelta, fLsbDelta; // used by auto-kerning | 65 int8_t fRsbDelta, fLsbDelta; // used by auto-kerning |
50 int8_t fForceBW; | 66 int8_t fForceBW; |
51 | 67 |
52 void initWithGlyphID(uint32_t glyph_id) { | 68 void initWithGlyphID(uint32_t glyph_id) { |
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126 } | 142 } |
127 }; | 143 }; |
128 | 144 |
129 private: | 145 private: |
130 // TODO(herb) remove friend statement after SkGlyphCache cleanup. | 146 // TODO(herb) remove friend statement after SkGlyphCache cleanup. |
131 friend class SkGlyphCache; | 147 friend class SkGlyphCache; |
132 | 148 |
133 void initCommon(uint32_t id) { | 149 void initCommon(uint32_t id) { |
134 fID = id; | 150 fID = id; |
135 fImage = nullptr; | 151 fImage = nullptr; |
136 fPath = nullptr; | 152 fPathData = nullptr; |
137 fMaskFormat = MASK_FORMAT_UNKNOWN; | 153 fMaskFormat = MASK_FORMAT_UNKNOWN; |
138 fForceBW = 0; | 154 fForceBW = 0; |
139 } | 155 } |
140 | 156 |
141 static unsigned ID2Code(uint32_t id) { | 157 static unsigned ID2Code(uint32_t id) { |
142 return id & kCodeMask; | 158 return id & kCodeMask; |
143 } | 159 } |
144 | 160 |
145 static unsigned ID2SubX(uint32_t id) { | 161 static unsigned ID2SubX(uint32_t id) { |
146 return id >> (kSubShift + kSubShiftX); | 162 return id >> (kSubShift + kSubShiftX); |
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169 SkASSERT(code <= kCodeMask); | 185 SkASSERT(code <= kCodeMask); |
170 x = FixedToSub(x); | 186 x = FixedToSub(x); |
171 y = FixedToSub(y); | 187 y = FixedToSub(y); |
172 uint32_t ID = (x << (kSubShift + kSubShiftX)) | | 188 uint32_t ID = (x << (kSubShift + kSubShiftX)) | |
173 (y << (kSubShift + kSubShiftY)) | | 189 (y << (kSubShift + kSubShiftY)) | |
174 code; | 190 code; |
175 SkASSERT(ID != kImpossibleID); | 191 SkASSERT(ID != kImpossibleID); |
176 return ID; | 192 return ID; |
177 } | 193 } |
178 | 194 |
179 // FIXME - This is needed because the Android frame work directly | 195 // FIXME - This is needed because the Android frame work directly |
180 // accesses fID. Remove when fID accesses are cleaned up. | 196 // accesses fID. Remove when fID accesses are cleaned up. |
181 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK | 197 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK |
182 public: | 198 public: |
183 #endif | 199 #endif |
184 uint32_t fID; | 200 uint32_t fID; |
185 }; | 201 }; |
186 SK_END_REQUIRE_DENSE | 202 SK_END_REQUIRE_DENSE |
187 | 203 |
188 #endif | 204 #endif |
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