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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
* Copyright 2008 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 SkFilter_DEFINED
#define SkFilter_DEFINED
#include "SkMath.h"
#include "SkFixed.h"
typedef unsigned (*SkFilterProc)(unsigned x00, unsigned x01,
unsigned x10, unsigned x11);
const SkFilterProc* SkGetBilinearFilterProcTable();
inline SkFilterProc SkGetBilinearFilterProc(const SkFilterProc* table,
SkFixed x, SkFixed y)
{
SkASSERT(table);
// convert to dot 2
x = (unsigned)(x << 16) >> 30;
y = (unsigned)(y << 16) >> 30;
return table[(y << 2) | x];
}
inline SkFilterProc SkGetBilinearFilterProc22(const SkFilterProc* table,
unsigned x, unsigned y)
{
SkASSERT(table);
// extract low 2 bits
x = x << 30 >> 30;
y = y << 30 >> 30;
return table[(y << 2) | x];
}
inline const SkFilterProc* SkGetBilinearFilterProc22Row(const SkFilterProc* table,
unsigned y)
{
SkASSERT(table);
// extract low 2 bits and shift up 2
return &table[y << 30 >> 28];
}
inline SkFilterProc SkGetBilinearFilterProc22RowProc(const SkFilterProc* row,
unsigned x)
{
SkASSERT(row);
// extract low 2 bits
return row[x << 30 >> 30];
}
///////////////////////////////////////////////////////////////////////////////
typedef unsigned (*SkFilter32Proc)(uint32_t x00, uint32_t x01,
uint32_t x10, uint32_t x11);
const SkFilter32Proc* SkGetFilter32ProcTable();
inline SkFilter32Proc SkGetFilter32Proc22(const SkFilter32Proc* table,
unsigned x, unsigned y)
{
SkASSERT(table);
// extract low 2 bits
x = x << 30 >> 30;
y = y << 30 >> 30;
return table[(y << 2) | x];
}
inline const SkFilter32Proc* SkGetFilter32Proc22Row(const SkFilter32Proc* table,
unsigned y)
{
SkASSERT(table);
// extract low 2 bits and shift up 2
return &table[y << 30 >> 28];
}
inline SkFilter32Proc SkGetFilter32Proc22RowProc(const SkFilter32Proc* row,
unsigned x)
{
SkASSERT(row);
// extract low 2 bits
return row[x << 30 >> 30];
}
///////////////////////////////////////////////////////////////////////////////
/** Special version of SkFilterProc. This takes the address of 4 ints, and combines them a byte at a
time. AABBCCDD.
*/
typedef uint32_t (*SkFilterPtrProc)(const uint32_t*, const uint32_t*, const uint32_t*, const uint32_t*);
const SkFilterPtrProc* SkGetBilinearFilterPtrProcTable();
inline SkFilterPtrProc SkGetBilinearFilterPtrProc(const SkFilterPtrProc* table, SkFixed x, SkFixed y)
{
SkASSERT(table);
// convert to dot 2
x = (unsigned)(x << 16) >> 30;
y = (unsigned)(y << 16) >> 30;
return table[(y << 2) | x];
}
/** Given a Y value, return a subset of the proc table for that value.
Pass this to SkGetBilinearFilterPtrXProc with the corresponding X value to get the
correct proc.
*/
inline const SkFilterPtrProc* SkGetBilinearFilterPtrProcYTable(const SkFilterPtrProc* table, SkFixed y)
{
SkASSERT(table);
y = (unsigned)(y << 16) >> 30;
return table + (y << 2);
}
/** Given a subtable returned by SkGetBilinearFilterPtrProcYTable(), return the proc for the
specified X value.
*/
inline SkFilterPtrProc SkGetBilinearFilterPtrXProc(const SkFilterPtrProc* table, SkFixed x)
{
SkASSERT(table);
// convert to dot 2
x = (unsigned)(x << 16) >> 30;
return table[x];
}
#endif
|
