OLD | NEW |
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 |
(...skipping 86 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
97 enum { | 97 enum { |
98 kSubBits = 2, | 98 kSubBits = 2, |
99 kSubMask = ((1 << kSubBits) - 1), | 99 kSubMask = ((1 << kSubBits) - 1), |
100 kSubShift = 24, // must be large enough for glyphs and unichars | 100 kSubShift = 24, // must be large enough for glyphs and unichars |
101 kCodeMask = ((1 << kSubShift) - 1), | 101 kCodeMask = ((1 << kSubShift) - 1), |
102 // relative offsets for X and Y subpixel bits | 102 // relative offsets for X and Y subpixel bits |
103 kSubShiftX = kSubBits, | 103 kSubShiftX = kSubBits, |
104 kSubShiftY = 0 | 104 kSubShiftY = 0 |
105 }; | 105 }; |
106 | 106 |
107 // The code is increased by one in MakeID. Adjust back. This allows the zero | |
108 // id to be the invalid id. | |
109 static unsigned ID2Code(uint32_t id) { | 107 static unsigned ID2Code(uint32_t id) { |
110 return (id & kCodeMask) - 1; | 108 return id & kCodeMask; |
111 } | 109 } |
112 | 110 |
113 static unsigned ID2SubX(uint32_t id) { | 111 static unsigned ID2SubX(uint32_t id) { |
114 return id >> (kSubShift + kSubShiftX); | 112 return id >> (kSubShift + kSubShiftX); |
115 } | 113 } |
116 | 114 |
117 static unsigned ID2SubY(uint32_t id) { | 115 static unsigned ID2SubY(uint32_t id) { |
118 return (id >> (kSubShift + kSubShiftY)) & kSubMask; | 116 return (id >> (kSubShift + kSubShiftY)) & kSubMask; |
119 } | 117 } |
120 | 118 |
121 static unsigned FixedToSub(SkFixed n) { | 119 static unsigned FixedToSub(SkFixed n) { |
122 return (n >> (16 - kSubBits)) & kSubMask; | 120 return (n >> (16 - kSubBits)) & kSubMask; |
123 } | 121 } |
124 | 122 |
125 static SkFixed SubToFixed(unsigned sub) { | 123 static SkFixed SubToFixed(unsigned sub) { |
126 SkASSERT(sub <= kSubMask); | 124 SkASSERT(sub <= kSubMask); |
127 return sub << (16 - kSubBits); | 125 return sub << (16 - kSubBits); |
128 } | 126 } |
129 | 127 |
130 // This and the MakeID below must not return an id of zero. Zero is used as | |
131 // the invalid id. | |
132 static uint32_t MakeID(unsigned code) { | 128 static uint32_t MakeID(unsigned code) { |
133 SkASSERT(code + 1 <= kCodeMask); | 129 return code; |
134 return code + 1; | |
135 } | 130 } |
136 | 131 |
137 // See comment for MakeID above. | |
138 static uint32_t MakeID(unsigned code, SkFixed x, SkFixed y) { | 132 static uint32_t MakeID(unsigned code, SkFixed x, SkFixed y) { |
139 SkASSERT(code + 1 <= kCodeMask); | 133 SkASSERT(code <= kCodeMask); |
140 x = FixedToSub(x); | 134 x = FixedToSub(x); |
141 y = FixedToSub(y); | 135 y = FixedToSub(y); |
142 return (x << (kSubShift + kSubShiftX)) | | 136 return (x << (kSubShift + kSubShiftX)) | |
143 (y << (kSubShift + kSubShiftY)) | | 137 (y << (kSubShift + kSubShiftY)) | |
144 (code + 1); | 138 code; |
145 } | 139 } |
146 | 140 |
147 void toMask(SkMask* mask) const; | 141 void toMask(SkMask* mask) const; |
148 }; | 142 }; |
149 | 143 |
150 #endif | 144 #endif |
OLD | NEW |