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
|
/*
* 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 "gm.h"
#include "SkGradientShader.h"
namespace skiagm {
class FillTypePerspGM : public GM {
SkPath fPath;
public:
FillTypePerspGM() {
const SkScalar radius = SkIntToScalar(45);
fPath.addCircle(SkIntToScalar(50), SkIntToScalar(50), radius);
fPath.addCircle(SkIntToScalar(100), SkIntToScalar(100), radius);
}
protected:
virtual SkString onShortName() {
return SkString("filltypespersp");
}
virtual SkISize onISize() {
return make_isize(835, 840);
}
void showPath(SkCanvas* canvas, int x, int y, SkPath::FillType ft,
SkScalar scale, const SkPaint& paint) {
const SkRect r = { 0, 0, SkIntToScalar(150), SkIntToScalar(150) };
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->clipRect(r);
canvas->drawColor(SK_ColorWHITE);
fPath.setFillType(ft);
canvas->translate(r.centerX(), r.centerY());
canvas->scale(scale, scale);
canvas->translate(-r.centerX(), -r.centerY());
canvas->drawPath(fPath, paint);
canvas->restore();
}
void showFour(SkCanvas* canvas, SkScalar scale, bool aa) {
SkPaint paint;
SkPoint center = SkPoint::Make(SkIntToScalar(100), SkIntToScalar(100));
SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN};
SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1};
SkShader* s = SkGradientShader::CreateRadial(center,
SkIntToScalar(100),
colors,
pos,
SK_ARRAY_COUNT(colors),
SkShader::kClamp_TileMode);
paint.setShader(s)->unref();
paint.setAntiAlias(aa);
showPath(canvas, 0, 0, SkPath::kWinding_FillType,
scale, paint);
showPath(canvas, 200, 0, SkPath::kEvenOdd_FillType,
scale, paint);
showPath(canvas, 00, 200, SkPath::kInverseWinding_FillType,
scale, paint);
showPath(canvas, 200, 200, SkPath::kInverseEvenOdd_FillType,
scale, paint);
}
virtual void onDraw(SkCanvas* canvas) {
// do perspective drawPaint as the background;
SkPaint bkgnrd;
SkPoint center = SkPoint::Make(SkIntToScalar(100),
SkIntToScalar(100));
SkColor colors[] = {SK_ColorBLACK, SK_ColorCYAN,
SK_ColorYELLOW, SK_ColorWHITE};
SkScalar pos[] = {0, SK_ScalarHalf / 2,
3 * SK_ScalarHalf / 2, SK_Scalar1};
SkShader* s = SkGradientShader::CreateRadial(center,
SkIntToScalar(1000),
colors,
pos,
SK_ARRAY_COUNT(colors),
SkShader::kClamp_TileMode);
bkgnrd.setShader(s)->unref();
canvas->save();
canvas->translate(SkIntToScalar(100), SkIntToScalar(100));
SkMatrix mat;
mat.reset();
mat.setPerspY(SkScalarToPersp(SK_Scalar1 / 1000));
canvas->concat(mat);
canvas->drawPaint(bkgnrd);
canvas->restore();
// draw the paths in perspective
SkMatrix persp;
persp.reset();
persp.setPerspX(SkScalarToPersp(-SK_Scalar1 / 1800));
persp.setPerspY(SkScalarToPersp(SK_Scalar1 / 500));
canvas->concat(persp);
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
const SkScalar scale = SkIntToScalar(5)/4;
showFour(canvas, SK_Scalar1, false);
canvas->translate(SkIntToScalar(450), 0);
showFour(canvas, scale, false);
canvas->translate(SkIntToScalar(-450), SkIntToScalar(450));
showFour(canvas, SK_Scalar1, true);
canvas->translate(SkIntToScalar(450), 0);
showFour(canvas, scale, true);
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new FillTypePerspGM; }
static GMRegistry reg(MyFactory);
}
|
