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
|
/*
* 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 "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
static const int kILimit = 101;
static const SkScalar kLimit = SK_Scalar1 * kILimit;
class OvalTestView : public SampleView {
public:
SkSize fSize;
SkPMColor fInsideColor; // signals an interior pixel that was not set
SkPMColor fOutsideColor; // signals an exterior pixels that was set
SkBitmap fBitmap;
OvalTestView() {
fSize.set(SK_Scalar1, SK_Scalar1);
fBitmap.setConfig(SkBitmap::kARGB_8888_Config, kILimit, kILimit);
fBitmap.allocPixels();
fInsideColor = SkPreMultiplyColor(SK_ColorRED);
fOutsideColor = SkPreMultiplyColor(SK_ColorGREEN);
this->setBGColor(0xFFDDDDDD);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "OvalTest");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawOval() {
SkCanvas canvas(fBitmap);
SkPaint p;
fBitmap.eraseColor(SK_ColorTRANSPARENT);
canvas.drawOval(SkRect::MakeSize(fSize), p);
}
int checkOval(int* flatCount, int* buldgeCount) {
int flatc = 0;
int buldgec = 0;
const SkScalar rad = SkScalarHalf(fSize.width());
SkScalar cx = SkScalarHalf(fSize.width());
SkScalar cy = SkScalarHalf(fSize.height());
for (int y = 0; y < kILimit; y++) {
for (int x = 0; x < kILimit; x++) {
// measure from pixel centers
SkScalar px = SkIntToScalar(x) + SK_ScalarHalf;
SkScalar py = SkIntToScalar(y) + SK_ScalarHalf;
SkPMColor* ptr = fBitmap.getAddr32(x, y);
SkScalar dist = SkPoint::Length(px - cx, py - cy);
if (dist <= rad && !*ptr) {
flatc++;
*ptr = fInsideColor;
} else if (dist > rad && *ptr) {
buldgec++;
*ptr = fOutsideColor;
}
}
}
if (flatCount) *flatCount = flatc;
if (buldgeCount) *buldgeCount = buldgec;
return flatc + buldgec;
}
virtual void onDrawContent(SkCanvas* canvas) {
this->drawOval();
int flatCount, buldgeCount;
this->checkOval(&flatCount, &buldgeCount);
this->inval(NULL);
canvas->drawBitmap(fBitmap, SkIntToScalar(20), SkIntToScalar(20), NULL);
static int gFlatCount;
static int gBuldgeCount;
gFlatCount += flatCount;
gBuldgeCount += buldgeCount;
if (fSize.fWidth < kLimit) {
SkDebugf("--- width=%g, flat=%d buldge=%d total: flat=%d buldge=%d\n", fSize.fWidth,
flatCount, buldgeCount, gFlatCount, gBuldgeCount);
fSize.fWidth += SK_Scalar1;
fSize.fHeight += SK_Scalar1;
} else {
// fSize.set(SK_Scalar1, SK_Scalar1);
}
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERRIDE {
this->inval(NULL);
return NULL;
}
private:
typedef SampleView INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new OvalTestView; }
static SkViewRegister reg(MyFactory);
|
