1 /*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SampleCode.h"
9 #include "SkBitmap.h"
10 #include "SkBlurMask.h"
11 #include "SkBlurMaskFilter.h"
12 #include "SkCanvas.h"
13 #include "SkColorPriv.h"
14 #include "SkGradientShader.h"
15 #include "SkUtils.h"
16 #include "SkView.h"
17
18 class BlurView : public SampleView {
19 SkBitmap fBM;
20 public:
BlurView()21 BlurView() {}
22
23 protected:
24 // overrides from SkEventSink
onQuery(SkEvent * evt)25 virtual bool onQuery(SkEvent* evt) {
26 if (SampleCode::TitleQ(*evt)) {
27 SampleCode::TitleR(evt, "Blur");
28 return true;
29 }
30 return this->INHERITED::onQuery(evt);
31 }
32
drawBG(SkCanvas * canvas)33 void drawBG(SkCanvas* canvas) {
34 canvas->drawColor(0xFFDDDDDD);
35 }
36
onDrawContent(SkCanvas * canvas)37 virtual void onDrawContent(SkCanvas* canvas) {
38 drawBG(canvas);
39
40 SkBlurStyle NONE = SkBlurStyle(-999);
41 static const struct {
42 SkBlurStyle fStyle;
43 int fCx, fCy;
44 } gRecs[] = {
45 { NONE, 0, 0 },
46 { kInner_SkBlurStyle, -1, 0 },
47 { kNormal_SkBlurStyle, 0, 1 },
48 { kSolid_SkBlurStyle, 0, -1 },
49 { kOuter_SkBlurStyle, 1, 0 },
50 };
51
52 SkPaint paint;
53 paint.setAntiAlias(true);
54 paint.setTextSize(25);
55 canvas->translate(-40, 0);
56
57 SkBlurMaskFilter::BlurFlags flags = SkBlurMaskFilter::kNone_BlurFlag;
58 for (int j = 0; j < 2; j++) {
59 canvas->save();
60 paint.setColor(SK_ColorBLUE);
61 for (size_t i = 0; i < SK_ARRAY_COUNT(gRecs); i++) {
62 if (gRecs[i].fStyle != NONE) {
63 paint.setMaskFilter(SkBlurMaskFilter::Make(gRecs[i].fStyle,
64 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(20)),
65 flags));
66 } else {
67 paint.setMaskFilter(nullptr);
68 }
69 canvas->drawCircle(200 + gRecs[i].fCx*100.f,
70 200 + gRecs[i].fCy*100.f, 50, paint);
71 }
72 // draw text
73 {
74 paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
75 SkBlurMask::ConvertRadiusToSigma(4),
76 flags));
77 SkScalar x = SkIntToScalar(70);
78 SkScalar y = SkIntToScalar(400);
79 paint.setColor(SK_ColorBLACK);
80 canvas->drawString("Hamburgefons Style", x, y, paint);
81 canvas->drawString("Hamburgefons Style", x, y + SkIntToScalar(50), paint);
82 paint.setMaskFilter(nullptr);
83 paint.setColor(SK_ColorWHITE);
84 x -= SkIntToScalar(2);
85 y -= SkIntToScalar(2);
86 canvas->drawString("Hamburgefons Style", x, y, paint);
87 }
88 canvas->restore();
89 flags = SkBlurMaskFilter::kHighQuality_BlurFlag;
90 canvas->translate(350, 0);
91 }
92 }
93
94 private:
95 typedef SkView INHERITED;
96 };
97
98 //////////////////////////////////////////////////////////////////////////////
99
MyFactory()100 static SkView* MyFactory() { return new BlurView; }
101 static SkViewRegister reg(MyFactory);
102