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
18class BlurView : public SampleView {
19    SkBitmap    fBM;
20public:
21    BlurView() {}
22
23protected:
24    // overrides from SkEventSink
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
33    void drawBG(SkCanvas* canvas) {
34        canvas->drawColor(0xFFDDDDDD);
35    }
36
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
94private:
95    typedef SkView INHERITED;
96};
97
98//////////////////////////////////////////////////////////////////////////////
99
100static SkView* MyFactory() { return new BlurView; }
101static SkViewRegister reg(MyFactory);
102