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