diff options
| author |  reed@google.com <reed@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-08-07 21:41:42 +0000 |
|---|---|---|
| committer | reed@google.com <reed@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-08-07 21:41:42 +0000 |
| commit | 66e51608f14d6554aed9d97f9ebc09f2cacb2310 (patch) | |
| tree | 00ed56f470d72ea9ddedd246e727a4a6960a9a80 /src/core | |
| parent | 4b163ed2c22facbe8891616874ae07ba7827d9c9 (diff) | |
Privatize SkAutoKern.h
git-svn-id: http://skia.googlecode.com/svn/trunk@4998 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'src/core')
| -rw-r--r-- | src/core/SkAutoKern.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/core/SkAutoKern.h b/src/core/SkAutoKern.h new file mode 100644 index 0000000000..f6879a1394 --- /dev/null +++ b/src/core/SkAutoKern.h @@ -0,0 +1,54 @@ + +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkAutoKern_DEFINED +#define SkAutoKern_DEFINED + +#include "SkGlyph.h" + +#define SkAutoKern_AdjustF(prev, next) (((next) - (prev) + 32) >> 6 << 16) +#define SkAutoKern_AdjustS(prev, next) SkIntToScalar(((next) - (prev) + 32) >> 6) + +/* this is a helper class to perform auto-kerning + * the adjust() method returns a SkFixed corresponding + * to a +1/0/-1 pixel adjustment + */ + +class SkAutoKern { +public: + SkAutoKern() : fPrevRsbDelta(0) {} + + SkFixed adjust(const SkGlyph& glyph) + { +// if (SkAbs32(glyph.fLsbDelta) > 47 || SkAbs32(glyph.fRsbDelta) > 47) +// printf("------- %d> L %d R %d\n", glyph.f_GlyphID, glyph.fLsbDelta, glyph.fRsbDelta); + +#if 0 + int distort = fPrevRsbDelta - glyph.fLsbDelta; + + fPrevRsbDelta = glyph.fRsbDelta; + + if (distort >= 32) + return -SK_Fixed1; + else if (distort < -32) + return +SK_Fixed1; + else + return 0; +#else + SkFixed adjust = SkAutoKern_AdjustF(fPrevRsbDelta, glyph.fLsbDelta); + fPrevRsbDelta = glyph.fRsbDelta; + return adjust; +#endif + } +private: + int fPrevRsbDelta; +}; + +#endif + |