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
|
/*
* Copyright 2015 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 "SkBlurMaskFilter.h"
#include "SkColorFilter.h"
#include "SkPaint.h"
#include "SkRRect.h"
namespace skiagm {
// This GM reproduces the precision artifacts seen in crbug.com/560651.
// It draws a largish blurred circle with its center clipped out.
class BlurredClippedCircleGM : public GM {
public:
BlurredClippedCircleGM() {
this->setBGColor(sk_tool_utils::color_to_565(0xFFCCCCCC));
}
protected:
SkString onShortName() override {
return SkString("blurredclippedcircle");
}
SkISize onISize() override {
return SkISize::Make(kWidth, kHeight);
}
void onDraw(SkCanvas* canvas) override {
SkPaint whitePaint;
whitePaint.setColor(SK_ColorWHITE);
whitePaint.setXfermode(SkXfermode::Make(SkXfermode::kSrc_Mode));
whitePaint.setAntiAlias(true);
// This scale exercises precision limits in the circle blur effect (crbug.com/560651)
static const float kScale = 2.0f;
canvas->scale(kScale, kScale);
canvas->save();
SkRect clipRect1 = SkRect::MakeLTRB(0, 0,
SkIntToScalar(kWidth), SkIntToScalar(kHeight));
canvas->clipRect(clipRect1, SkRegion::kIntersect_Op, false);
canvas->save();
canvas->clipRect(clipRect1, SkRegion::kIntersect_Op, false);
canvas->drawRect(clipRect1, whitePaint);
canvas->save();
SkRect clipRect2 = SkRect::MakeLTRB(8, 8, 288, 288);
SkRRect clipRRect = SkRRect::MakeOval(clipRect2);
canvas->clipRRect(clipRRect, SkRegion::kDifference_Op, true);
SkRect r = SkRect::MakeLTRB(4, 4, 292, 292);
SkRRect rr = SkRRect::MakeOval(r);
SkPaint paint;
paint.setMaskFilter(SkBlurMaskFilter::Make(
kNormal_SkBlurStyle,
1.366025f,
SkBlurMaskFilter::kHighQuality_BlurFlag));
paint.setColorFilter(SkColorFilter::MakeModeFilter(
SK_ColorRED,
SkXfermode::kSrcIn_Mode));
paint.setAntiAlias(true);
canvas->drawRRect(rr, paint);
canvas->restore();
canvas->restore();
canvas->restore();
}
private:
static const int kWidth = 1164;
static const int kHeight = 802;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new BlurredClippedCircleGM;)
}
|
