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
|
/*
* Copyright 2013 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"
#include "SkBitmapAlphaThresholdShader.h"
#include "SkTArray.h"
#include "SkParsePath.h"
class BitmapAlphaThresholdGM : public skiagm::GM {
public:
BitmapAlphaThresholdGM() {
this->setBGColor(0xFF000000);
}
private:
virtual uint32_t onGetFlags() const SK_OVERRIDE {
// narrow this flags when the shader has a CPU implementation and
// when it serializes.
return
kSkipPDF_Flag |
kSkipPicture_Flag |
kSkipPipe_Flag |
kSkipPipeCrossProcess_Flag |
kSkipTiled_Flag |
kSkip565_Flag |
kSkipScaledReplay_Flag |
kSkipPDFRasterization_Flag |
kGPUOnly_Flag;
}
virtual void onOnceBeforeDraw() SK_OVERRIDE {
fBM.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
if (!fBM.allocPixels()) {
return;
}
SkCanvas canvas(fBM);
SkPoint pts[] = { {0, 0}, {SkIntToScalar(fBM.width()), SkIntToScalar(fBM.height())} };
SkColor colors[] = {0x00000000, 0xffffffff};
SkShader* grad = SkGradientShader::CreateLinear(pts, colors, NULL, 2,
SkShader::kClamp_TileMode);
SkPaint gradPaint;
gradPaint.setShader(grad)->unref();
gradPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
canvas.drawPaint(gradPaint);
// Construct the region used as a mask.
SkRegion bmpBoundsClip;
bmpBoundsClip.setRect(0, 0, fBM.width(), fBM.height());
SkPath circlePath;
SkScalar radius = SkScalarSqrt(SkIntToScalar(fBM.width() * fBM.height())) / 2;
circlePath.addCircle(SkIntToScalar(fBM.width() / 2),
SkIntToScalar(fBM.height() / 2),
radius);
fMask.setPath(circlePath, bmpBoundsClip);
SkPath batPath;
SkParsePath::FromSVGString(
"M305.214,374.779c2.463,0,3.45,0.493,3.45,0.493l1.478-6.241c0,0,1.15,4.763,1.643,9.034"
"c0.493,4.271,8.048,1.479,14.454,0.164c6.405-1.314,7.72-11.662,7.72-11.662h59.294c0,0-35.807,10.841-26.772,34.656"
"c0,0-52.889-8.048-61.101,24.967h-0.001c-8.212-33.015-61.101-24.967-61.101-24.967c9.034-23.815-26.772-34.656-26.772-34.656"
"h59.294c0,0,1.314,10.348,7.719,11.662c6.406,1.314,13.962,4.106,14.454-0.164c0.493-4.271,1.643-9.034,1.643-9.034l1.479,6.241"
"c0,0,0.985-0.493,3.449-0.493H305.214L305.214,374.779z",
&batPath);
SkMatrix matrix;
matrix.setTranslate(-208, -280);
matrix.postScale(radius / 100, radius / 100);
batPath.transform(matrix, &batPath);
SkRegion batRegion;
batRegion.setPath(batPath, bmpBoundsClip);
fMask.op(batRegion, SkRegion::kDifference_Op);
}
virtual SkString onShortName() SK_OVERRIDE {
return SkString("bat");
}
virtual SkISize onISize() SK_OVERRIDE {
return SkISize::Make(518, 735);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
SkTArray<SkMatrix> lms;
lms.push_back().reset();
lms.push_back().setScale(SK_Scalar1 / 2, SK_Scalar1);
lms.push_back().setScale(SK_Scalar1, 2 * SK_Scalar1);
lms.push_back().setRotate(-SK_Scalar1 * 30);
lms.push_back().setSkew(0, SK_Scalar1 / 5);
static const SkScalar kMargin = 5 * SK_Scalar1;
canvas->translate(kMargin, kMargin);
canvas->save();
static const U8CPU kThresholds[] = { 0x0, 0x08, 0x40, 0x80, 0xC0, 0xF0, 0xFF };
for (size_t i = 0; i < SK_ARRAY_COUNT(kThresholds); ++i) {
for (int j = 0; j < lms.count(); ++j) {
SkRect rect;
rect.fLeft = 0;
rect.fTop = 0;
rect.fRight = SkIntToScalar(fBM.width());
rect.fBottom = SkIntToScalar(fBM.height());
SkShader* thresh;
// This SkShader currently only has a GPU implementation.
if (canvas->getDevice()->accessRenderTarget()) {
thresh = SkBitmapAlphaThresholdShader::Create(fBM, fMask, kThresholds[i]);
} else {
thresh = SkShader::CreateBitmapShader(fBM, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode);
}
thresh->setLocalMatrix(lms[j]);
SkPaint paint;
paint.setShader(thresh)->unref();
canvas->drawRect(rect, paint);
canvas->translate(SkIntToScalar(fBM.width() + kMargin), 0);
}
canvas->restore();
canvas->translate(0, SkIntToScalar(fBM.height() + kMargin));
canvas->save();
}
}
SkBitmap fBM;
SkRegion fMask;
typedef skiagm::GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new BitmapAlphaThresholdGM(); )
|
