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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* Copyright 2012 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 "SkAnimTimer.h"
#include "SkLightingImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkPoint3.h"
#define WIDTH 330
#define HEIGHT 660
namespace skiagm {
class ImageLightingGM : public GM {
public:
ImageLightingGM()
: fAzimuth(SkIntToScalar(kStartAzimuth)) {
this->setBGColor(0xFF000000);
}
protected:
SkString onShortName() override {
return SkString("lighting");
}
SkISize onISize() override {
return SkISize::Make(WIDTH, HEIGHT);
}
void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->clipRect(SkRect::MakeWH(
SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
canvas->drawBitmap(fBitmap, 0, 0, &paint);
canvas->restore();
}
void onOnceBeforeDraw() override {
fBitmap = sk_tool_utils::create_string_bitmap(100, 100, 0xFFFFFFFF, 20, 70, 96, "e");
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(sk_tool_utils::color_to_565(0xFF101010));
SkPaint checkPaint;
checkPaint.setColor(sk_tool_utils::color_to_565(0xFF202020));
for (int y = 0; y < HEIGHT; y += 16) {
for (int x = 0; x < WIDTH; x += 16) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), checkPaint);
canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), checkPaint);
canvas->restore();
}
}
SkScalar cosAzimuth;
SkScalar sinAzimuth = SkScalarSinCos(SkDegreesToRadians(fAzimuth), &cosAzimuth);
SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
SkPoint3 spotLocation = SkPoint3::Make(spotTarget.fX + 70.7214f * cosAzimuth,
spotTarget.fY + 70.7214f * sinAzimuth,
spotTarget.fZ + SkIntToScalar(20));
SkScalar spotExponent = SK_Scalar1;
SkPoint3 pointLocation = SkPoint3::Make(spotTarget.fX + 50 * cosAzimuth,
spotTarget.fY + 50 * sinAzimuth,
SkIntToScalar(10));
SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5));
SkPoint3 distantDirection = SkPoint3::Make(SkScalarMul(cosAzimuth,
SkScalarCos(elevationRad)),
SkScalarMul(sinAzimuth,
SkScalarCos(elevationRad)),
SkScalarSin(elevationRad));
SkScalar cutoffAngle = SkIntToScalar(15);
SkScalar kd = SkIntToScalar(2);
SkScalar ks = SkIntToScalar(1);
SkScalar shininess = SkIntToScalar(8);
SkScalar surfaceScale = SkIntToScalar(1);
SkColor white(0xFFFFFFFF);
SkPaint paint;
SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(20, 10, 60, 65));
SkImageFilter::CropRect fullSizeCropRect(SkRect::MakeXYWH(0, 0, 100, 100));
sk_sp<SkImageFilter> noopCropped(SkOffsetImageFilter::Make(0, 0, nullptr, &cropRect));
int y = 0;
for (int i = 0; i < 3; i++) {
const SkImageFilter::CropRect* cr = (i == 1) ? &cropRect : (i == 2) ? &fullSizeCropRect : nullptr;
sk_sp<SkImageFilter> input = (i == 2) ? noopCropped : nullptr;
paint.setImageFilter(SkLightingImageFilter::MakePointLitDiffuse(pointLocation,
white,
surfaceScale,
kd,
input,
cr));
drawClippedBitmap(canvas, paint, 0, y);
paint.setImageFilter(SkLightingImageFilter::MakeDistantLitDiffuse(distantDirection,
white,
surfaceScale,
kd,
input,
cr));
drawClippedBitmap(canvas, paint, 110, y);
paint.setImageFilter(SkLightingImageFilter::MakeSpotLitDiffuse(spotLocation,
spotTarget,
spotExponent,
cutoffAngle,
white,
surfaceScale,
kd,
input,
cr));
drawClippedBitmap(canvas, paint, 220, y);
y += 110;
paint.setImageFilter(SkLightingImageFilter::MakePointLitSpecular(pointLocation,
white,
surfaceScale,
ks,
shininess,
input,
cr));
drawClippedBitmap(canvas, paint, 0, y);
paint.setImageFilter(SkLightingImageFilter::MakeDistantLitSpecular(distantDirection,
white,
surfaceScale,
ks,
shininess,
input,
cr));
drawClippedBitmap(canvas, paint, 110, y);
paint.setImageFilter(SkLightingImageFilter::MakeSpotLitSpecular(spotLocation,
spotTarget,
spotExponent,
cutoffAngle,
white,
surfaceScale,
ks,
shininess,
input,
cr));
drawClippedBitmap(canvas, paint, 220, y);
y += 110;
}
}
bool onAnimate(const SkAnimTimer& timer) override {
constexpr SkScalar kDesiredDurationSecs = 15.0f;
fAzimuth = kStartAzimuth + timer.scaled(360.0f/kDesiredDurationSecs, 360.0f);
return true;
}
private:
static constexpr int kStartAzimuth = 225;
SkBitmap fBitmap;
SkScalar fAzimuth;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ImageLightingGM;)
}
|
