The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/core/SkAutoKern.h
gfx/skia/trunk/src/core/SkAutoKern.h
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:86649c4d1169 |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2006 The Android Open Source Project | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef SkAutoKern_DEFINED | |
| 11 #define SkAutoKern_DEFINED | |
| 12 | |
| 13 #include "SkGlyph.h" | |
| 14 | |
| 15 #define SkAutoKern_AdjustF(prev, next) (((next) - (prev) + 32) >> 6 << 16) | |
| 16 #define SkAutoKern_AdjustS(prev, next) SkIntToScalar(((next) - (prev) + 32) >> 6) | |
| 17 | |
| 18 /* this is a helper class to perform auto-kerning | |
| 19 * the adjust() method returns a SkFixed corresponding | |
| 20 * to a +1/0/-1 pixel adjustment | |
| 21 */ | |
| 22 | |
| 23 class SkAutoKern { | |
| 24 public: | |
| 25 SkAutoKern() : fPrevRsbDelta(0) {} | |
| 26 | |
| 27 SkFixed adjust(const SkGlyph& glyph) | |
| 28 { | |
| 29 // if (SkAbs32(glyph.fLsbDelta) > 47 || SkAbs32(glyph.fRsbDelta) > 47) | |
| 30 // printf("------- %d> L %d R %d\n", glyph.f_GlyphID, glyph.fLsbDelta, glyph.fRsbDelta); | |
| 31 | |
| 32 #if 0 | |
| 33 int distort = fPrevRsbDelta - glyph.fLsbDelta; | |
| 34 | |
| 35 fPrevRsbDelta = glyph.fRsbDelta; | |
| 36 | |
| 37 if (distort >= 32) | |
| 38 return -SK_Fixed1; | |
| 39 else if (distort < -32) | |
| 40 return +SK_Fixed1; | |
| 41 else | |
| 42 return 0; | |
| 43 #else | |
| 44 SkFixed adjust = SkAutoKern_AdjustF(fPrevRsbDelta, glyph.fLsbDelta); | |
| 45 fPrevRsbDelta = glyph.fRsbDelta; | |
| 46 return adjust; | |
| 47 #endif | |
| 48 } | |
| 49 private: | |
| 50 int fPrevRsbDelta; | |
| 51 }; | |
| 52 | |
| 53 #endif |
