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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 Google Inc. |
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 SkDrawProcs_DEFINED | 8 #ifndef SkDrawProcs_DEFINED |
9 #define SkDrawProcs_DEFINED | 9 #define SkDrawProcs_DEFINED |
10 | 10 |
11 #include "SkBlitter.h" | 11 #include "SkBlitter.h" |
12 #include "SkDraw.h" | 12 #include "SkDraw.h" |
| 13 #include "SkGlyph.h" |
13 | 14 |
14 class SkAAClip; | 15 class SkAAClip; |
15 class SkBlitter; | 16 class SkBlitter; |
16 | 17 |
17 struct SkDraw1Glyph { | 18 struct SkDraw1Glyph { |
18 const SkDraw* fDraw; | 19 const SkDraw* fDraw; |
19 const SkRegion* fClip; | 20 const SkRegion* fClip; |
20 const SkAAClip* fAAClip; | 21 const SkAAClip* fAAClip; |
21 SkBlitter* fBlitter; | 22 SkBlitter* fBlitter; |
22 SkGlyphCache* fCache; | 23 SkGlyphCache* fCache; |
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79 return true; | 80 return true; |
80 } | 81 } |
81 | 82 |
82 if (!paint.isAntiAlias()) { | 83 if (!paint.isAntiAlias()) { |
83 return false; | 84 return false; |
84 } | 85 } |
85 | 86 |
86 return SkDrawTreatAAStrokeAsHairline(strokeWidth, matrix, coverage); | 87 return SkDrawTreatAAStrokeAsHairline(strokeWidth, matrix, coverage); |
87 } | 88 } |
88 | 89 |
| 90 class SkTextAlignProc { |
| 91 public: |
| 92 SkTextAlignProc(SkPaint::Align align) |
| 93 : fAlign(align) { |
| 94 } |
| 95 |
| 96 // Returns the position of the glyph in fixed point, which may be rounded or
not |
| 97 // by the caller e.g. subpixel doesn't round. |
| 98 // @param point interpreted as SkFixed [x, y]. |
| 99 void operator()(const SkPoint& loc, const SkGlyph& glyph, SkIPoint* dst) { |
| 100 if (SkPaint::kLeft_Align == fAlign) { |
| 101 dst->set(SkScalarToFixed(loc.fX), SkScalarToFixed(loc.fY)); |
| 102 } else if (SkPaint::kCenter_Align == fAlign) { |
| 103 dst->set(SkScalarToFixed(loc.fX) - (glyph.fAdvanceX >> 1), |
| 104 SkScalarToFixed(loc.fY) - (glyph.fAdvanceY >> 1)); |
| 105 } else { |
| 106 SkASSERT(SkPaint::kRight_Align == fAlign); |
| 107 dst->set(SkScalarToFixed(loc.fX) - glyph.fAdvanceX, |
| 108 SkScalarToFixed(loc.fY) - glyph.fAdvanceY); |
| 109 } |
| 110 } |
| 111 private: |
| 112 const SkPaint::Align fAlign; |
| 113 }; |
| 114 |
| 115 class SkTextAlignProcScalar { |
| 116 public: |
| 117 SkTextAlignProcScalar(SkPaint::Align align) |
| 118 : fAlign(align) { |
| 119 } |
| 120 |
| 121 // Returns the glyph position, which may be rounded or not by the caller |
| 122 // e.g. subpixel doesn't round. |
| 123 void operator()(const SkPoint& loc, const SkGlyph& glyph, SkPoint* dst) { |
| 124 if (SkPaint::kLeft_Align == fAlign) { |
| 125 dst->set(loc.fX, loc.fY); |
| 126 } else if (SkPaint::kCenter_Align == fAlign) { |
| 127 dst->set(loc.fX - SkFixedToScalar(glyph.fAdvanceX >> 1), |
| 128 loc.fY - SkFixedToScalar(glyph.fAdvanceY >> 1)); |
| 129 } else { |
| 130 SkASSERT(SkPaint::kRight_Align == fAlign); |
| 131 dst->set(loc.fX - SkFixedToScalar(glyph.fAdvanceX), |
| 132 loc.fY - SkFixedToScalar(glyph.fAdvanceY)); |
| 133 } |
| 134 } |
| 135 private: |
| 136 const SkPaint::Align fAlign; |
| 137 }; |
| 138 |
89 #endif | 139 #endif |
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