blob: 7a5cdef5d7fb5513fd8778680837d0952b724723 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
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 "SkScalerContext.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
|
