1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8 #include "SampleCode.h"
9 #include "SkView.h"
10 #include "SkCanvas.h"
11 #include "SkGraphics.h"
12 #include "SkRandom.h"
13 #include "SkLayerDrawLooper.h"
14 #include "SkBlurMaskFilter.h"
15
16 #define WIDTH 200
17 #define HEIGHT 200
18
19 class LooperView : public SampleView {
20 public:
21
22 SkLayerDrawLooper* fLooper;
23
LooperView()24 LooperView() {
25 static const struct {
26 SkColor fColor;
27 SkPaint::Style fStyle;
28 SkScalar fWidth;
29 SkScalar fOffset;
30 int fBlur;
31 } gParams[] = {
32 { SK_ColorWHITE, SkPaint::kStroke_Style, SkIntToScalar(1)*3/4, 0, 0 },
33 { SK_ColorRED, SkPaint::kStroke_Style, SkIntToScalar(4), 0, 0 },
34 { SK_ColorBLUE, SkPaint::kFill_Style, 0, 0, 0 },
35 { 0x88000000, SkPaint::kFill_Style, 0, SkIntToScalar(10), 3 }
36 };
37
38 fLooper = new SkLayerDrawLooper;
39
40 SkLayerDrawLooper::LayerInfo info;
41 info.fFlagsMask = SkPaint::kAntiAlias_Flag;
42 info.fPaintBits = SkLayerDrawLooper::kStyle_Bit | SkLayerDrawLooper::kMaskFilter_Bit;
43 info.fColorMode = SkXfermode::kSrc_Mode;
44
45 for (size_t i = 0; i < SK_ARRAY_COUNT(gParams); i++) {
46 info.fOffset.set(gParams[i].fOffset, gParams[i].fOffset);
47 SkPaint* paint = fLooper->addLayer(info);
48 paint->setAntiAlias(true);
49 paint->setColor(gParams[i].fColor);
50 paint->setStyle(gParams[i].fStyle);
51 paint->setStrokeWidth(gParams[i].fWidth);
52 if (gParams[i].fBlur > 0) {
53 SkMaskFilter* mf = SkBlurMaskFilter::Create(SkIntToScalar(gParams[i].fBlur),
54 SkBlurMaskFilter::kNormal_BlurStyle);
55 paint->setMaskFilter(mf)->unref();
56 }
57 }
58
59 this->setBGColor(0xFFDDDDDD);
60 }
61
~LooperView()62 virtual ~LooperView() {
63 SkSafeUnref(fLooper);
64 }
65
66 protected:
67 // overrides from SkEventSink
onQuery(SkEvent * evt)68 virtual bool onQuery(SkEvent* evt) {
69 if (SampleCode::TitleQ(*evt)) {
70 SampleCode::TitleR(evt, "DrawLooper");
71 return true;
72 }
73 return this->INHERITED::onQuery(evt);
74 }
75
onDrawContent(SkCanvas * canvas)76 virtual void onDrawContent(SkCanvas* canvas) {
77 SkPaint paint;
78 paint.setTextSize(SkIntToScalar(72));
79 paint.setLooper(fLooper);
80
81 canvas->drawCircle(SkIntToScalar(50), SkIntToScalar(50),
82 SkIntToScalar(30), paint);
83
84 canvas->drawRectCoords(SkIntToScalar(150), SkIntToScalar(50),
85 SkIntToScalar(200), SkIntToScalar(100), paint);
86
87 canvas->drawText("Looper", 6, SkIntToScalar(230), SkIntToScalar(100),
88 paint);
89 }
90
91 private:
92 typedef SampleView INHERITED;
93 };
94
95 //////////////////////////////////////////////////////////////////////////////
96
MyFactory()97 static SkView* MyFactory() { return new LooperView; }
98 static SkViewRegister reg(MyFactory);
99
100