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
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkMath.h"
#include "SkMathPriv.h"
#define SCALE_FILTER_NAME MAKENAME(_filter_scale)
#define PACK_FILTER_X_NAME MAKENAME(_pack_filter_x)
#define PACK_FILTER_Y_NAME MAKENAME(_pack_filter_y)
#ifndef PREAMBLE
#define PREAMBLE(state)
#define PREAMBLE_PARAM_X
#define PREAMBLE_PARAM_Y
#define PREAMBLE_ARG_X
#define PREAMBLE_ARG_Y
#endif
// declare functions externally to suppress warnings.
void SCALE_FILTER_NAME(const SkBitmapProcState& s,
uint32_t xy[], int count, int x, int y);
static inline uint32_t PACK_FILTER_Y_NAME(SkFixed f, unsigned max,
SkFixed one PREAMBLE_PARAM_Y) {
unsigned i = TILEY_PROCF(f, max);
i = (i << 4) | EXTRACT_LOW_BITS(f, max);
return (i << 14) | (TILEY_PROCF((f + one), max));
}
static inline uint32_t PACK_FILTER_X_NAME(SkFixed f, unsigned max,
SkFixed one PREAMBLE_PARAM_X) {
unsigned i = TILEX_PROCF(f, max);
i = (i << 4) | EXTRACT_LOW_BITS(f, max);
return (i << 14) | (TILEX_PROCF((f + one), max));
}
void SCALE_FILTER_NAME(const SkBitmapProcState& s,
uint32_t xy[], int count, int x, int y) {
SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
SkMatrix::kScale_Mask)) == 0);
SkASSERT(s.fInvKy == 0);
PREAMBLE(s);
const unsigned maxX = s.fPixmap.width() - 1;
const SkFixed one = s.fFilterOneX;
const SkFractionalInt dx = s.fInvSxFractionalInt;
SkFractionalInt fx;
{
const SkBitmapProcStateAutoMapper mapper(s, x, y);
const SkFixed fy = mapper.fixedY();
const unsigned maxY = s.fPixmap.height() - 1;
// compute our two Y values up front
*xy++ = PACK_FILTER_Y_NAME(fy, maxY, s.fFilterOneY PREAMBLE_ARG_Y);
// now initialize fx
fx = mapper.fractionalIntX();
}
#ifdef CHECK_FOR_DECAL
const SkFixed fixedFx = SkFractionalIntToFixed(fx);
const SkFixed fixedDx = SkFractionalIntToFixed(dx);
if (can_truncate_to_fixed_for_decal(fixedFx, fixedDx, count, maxX)) {
decal_filter_scale(xy, fixedFx, fixedDx, count);
} else
#endif
{
do {
SkFixed fixedFx = SkFractionalIntToFixed(fx);
*xy++ = PACK_FILTER_X_NAME(fixedFx, maxX, one PREAMBLE_ARG_X);
fx += dx;
} while (--count != 0);
}
}
#undef MAKENAME
#undef TILEX_PROCF
#undef TILEY_PROCF
#ifdef CHECK_FOR_DECAL
#undef CHECK_FOR_DECAL
#endif
#undef SCALE_FILTER_NAME
#undef PREAMBLE
#undef PREAMBLE_PARAM_X
#undef PREAMBLE_PARAM_Y
#undef PREAMBLE_ARG_X
#undef PREAMBLE_ARG_Y
#undef EXTRACT_LOW_BITS
|
