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
|
/*
* 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 "SkMathPriv.h"
#define SCALE_FILTER_NAME MAKENAME(_filter_DX_shaderproc)
// Can't be static in the general case because some of these implementations
// will be defined and referenced in different object files.
void SCALE_FILTER_NAME(const SkBitmapProcState& s, int x, int y,
DSTTYPE* SK_RESTRICT colors, int count);
void SCALE_FILTER_NAME(const SkBitmapProcState& s, int x, int y,
DSTTYPE* SK_RESTRICT colors, int count) {
SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
SkMatrix::kScale_Mask)) == 0);
SkASSERT(s.fInvKy == 0);
SkASSERT(count > 0 && colors != NULL);
SkASSERT(s.fFilterLevel != SkPaint::kNone_FilterLevel);
SkDEBUGCODE(CHECKSTATE(s);)
const unsigned maxX = s.fBitmap->width() - 1;
const SkFixed oneX = s.fFilterOneX;
const SkFixed dx = s.fInvSx;
SkFixed fx;
const SRCTYPE* SK_RESTRICT row0;
const SRCTYPE* SK_RESTRICT row1;
unsigned subY;
{
SkPoint pt;
s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
SkIntToScalar(y) + SK_ScalarHalf, &pt);
SkFixed fy = SkScalarToFixed(pt.fY) - (s.fFilterOneY >> 1);
const unsigned maxY = s.fBitmap->height() - 1;
// compute our two Y values up front
subY = TILEY_LOW_BITS(fy, maxY);
int y0 = TILEY_PROCF(fy, maxY);
int y1 = TILEY_PROCF((fy + s.fFilterOneY), maxY);
const char* SK_RESTRICT srcAddr = (const char*)s.fBitmap->getPixels();
size_t rb = s.fBitmap->rowBytes();
row0 = (const SRCTYPE*)(srcAddr + y0 * rb);
row1 = (const SRCTYPE*)(srcAddr + y1 * rb);
// now initialize fx
fx = SkScalarToFixed(pt.fX) - (oneX >> 1);
}
#ifdef PREAMBLE
PREAMBLE(s);
#endif
do {
unsigned subX = TILEX_LOW_BITS(fx, maxX);
unsigned x0 = TILEX_PROCF(fx, maxX);
unsigned x1 = TILEX_PROCF((fx + oneX), maxX);
FILTER_PROC(subX, subY,
SRC_TO_FILTER(row0[x0]),
SRC_TO_FILTER(row0[x1]),
SRC_TO_FILTER(row1[x0]),
SRC_TO_FILTER(row1[x1]),
colors);
colors += 1;
fx += dx;
} while (--count != 0);
#ifdef POSTAMBLE
POSTAMBLE(s);
#endif
}
///////////////////////////////////////////////////////////////////////////////
#undef TILEX_PROCF
#undef TILEY_PROCF
#undef TILEX_LOW_BITS
#undef TILEY_LOW_BITS
#undef MAKENAME
#undef SRCTYPE
#undef DSTTYPE
#undef CHECKSTATE
#undef SRC_TO_FILTER
#undef FILTER_TO_DST
#undef PREAMBLE
#undef POSTAMBLE
#undef SCALE_FILTER_NAME
|
