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 SkFDot6_DEFINED
11#define SkFDot6_DEFINED
12
13#include "SkMath.h"
14
15typedef int32_t SkFDot6;
16
17#define SK_FDot6One         (64)
18#define SK_FDot6Half        (32)
19
20#ifdef SK_DEBUG
21    inline SkFDot6 SkIntToFDot6(S16CPU x) {
22        SkASSERT(SkToS16(x) == x);
23        return x << 6;
24    }
25#else
26    #define SkIntToFDot6(x) ((x) << 6)
27#endif
28
29#define SkFDot6Floor(x)     ((x) >> 6)
30#define SkFDot6Ceil(x)      (((x) + 63) >> 6)
31#define SkFDot6Round(x)     (((x) + 32) >> 6)
32
33#define SkFixedToFDot6(x)   ((x) >> 10)
34
35inline SkFixed SkFDot6ToFixed(SkFDot6 x) {
36    SkASSERT((x << 10 >> 10) == x);
37
38    return x << 10;
39}
40
41#ifdef SK_SCALAR_IS_FLOAT
42    #define SkScalarToFDot6(x)  (SkFDot6)((x) * 64)
43#else
44    #define SkScalarToFDot6(x)  ((x) >> 10)
45#endif
46
47inline SkFixed SkFDot6Div(SkFDot6 a, SkFDot6 b) {
48    SkASSERT(b != 0);
49
50    if (a == (int16_t)a) {
51        return (a << 16) / b;
52    } else {
53        return SkFixedDiv(a, b);
54    }
55}
56
57#endif
58
59