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 "Sample.h"
9 #include "SkAnimTimer.h"
10 #include "SkCanvas.h"
11 #include "SkColorFilter.h"
12 #include "SkColorPriv.h"
13 #include "SkCornerPathEffect.h"
14 #include "SkDrawable.h"
15 #include "SkGradientShader.h"
16 #include "SkPath.h"
17 #include "SkPathMeasure.h"
18 #include "SkPictureRecorder.h"
19 #include "SkRandom.h"
20 #include "SkRegion.h"
21 #include "SkShader.h"
22 #include "SkString.h"
23 #include "SkTextUtils.h"
24 #include "SkUTF.h"
25 #include "Sk1DPathEffect.h"
26
27 #include "SkParsePath.h"
testparse()28 static void testparse() {
29 SkRect r;
30 r.set(0, 0, 10, 10.5f);
31 SkPath p, p2;
32 SkString str, str2;
33
34 p.addRect(r);
35 SkParsePath::ToSVGString(p, &str);
36 SkParsePath::FromSVGString(str.c_str(), &p2);
37 SkParsePath::ToSVGString(p2, &str2);
38 }
39
40 class ArcsView : public Sample {
41 class MyDrawable : public SkDrawable {
42 SkRect fR;
43 SkScalar fSweep;
44 public:
MyDrawable(const SkRect & r)45 MyDrawable(const SkRect& r) : fR(r), fSweep(0) {}
46
setSweep(SkScalar sweep)47 void setSweep(SkScalar sweep) {
48 if (fSweep != sweep) {
49 fSweep = sweep;
50 this->notifyDrawingChanged();
51 }
52 }
53
onDraw(SkCanvas * canvas)54 void onDraw(SkCanvas* canvas) override {
55 SkPaint paint;
56 paint.setAntiAlias(true);
57 paint.setStrokeWidth(SkIntToScalar(2));
58
59 paint.setStyle(SkPaint::kFill_Style);
60 paint.setColor(0x800000FF);
61 canvas->drawArc(fR, 0, fSweep, true, paint);
62
63 paint.setColor(0x800FF000);
64 canvas->drawArc(fR, 0, fSweep, false, paint);
65
66 paint.setStyle(SkPaint::kStroke_Style);
67 paint.setColor(SK_ColorRED);
68 canvas->drawArc(fR, 0, fSweep, true, paint);
69
70 paint.setStrokeWidth(0);
71 paint.setColor(SK_ColorBLUE);
72 canvas->drawArc(fR, 0, fSweep, false, paint);
73 }
74
onGetBounds()75 SkRect onGetBounds() override {
76 SkRect r(fR);
77 r.outset(2, 2);
78 return r;
79 }
80 };
81
82 public:
83 SkRect fRect;
84 sk_sp<MyDrawable> fAnimatingDrawable;
85 sk_sp<SkDrawable> fRootDrawable;
86
ArcsView()87 ArcsView() { }
88
89 protected:
onQuery(Sample::Event * evt)90 bool onQuery(Sample::Event* evt) override {
91 if (Sample::TitleQ(*evt)) {
92 Sample::TitleR(evt, "Arcs");
93 return true;
94 }
95 return this->INHERITED::onQuery(evt);
96 }
97
DrawRectWithLines(SkCanvas * canvas,const SkRect & r,const SkPaint & p)98 static void DrawRectWithLines(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
99 canvas->drawRect(r, p);
100 canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p);
101 canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p);
102 canvas->drawLine(r.fLeft, r.centerY(), r.fRight, r.centerY(), p);
103 canvas->drawLine(r.centerX(), r.fTop, r.centerX(), r.fBottom, p);
104 }
105
DrawLabel(SkCanvas * canvas,const SkRect & rect,SkScalar start,SkScalar sweep)106 static void DrawLabel(SkCanvas* canvas, const SkRect& rect, SkScalar start, SkScalar sweep) {
107 SkFont font;
108 SkString str;
109 str.appendScalar(start);
110 str.append(", ");
111 str.appendScalar(sweep);
112 SkTextUtils::DrawString(canvas, str.c_str(), rect.centerX(),
113 rect.fBottom + font.getSize() * 5/4, font, SkPaint(),
114 SkTextUtils::kCenter_Align);
115 }
116
DrawArcs(SkCanvas * canvas)117 static void DrawArcs(SkCanvas* canvas) {
118 SkPaint paint;
119 SkRect r;
120 SkScalar w = 75;
121 SkScalar h = 50;
122
123 r.set(0, 0, w, h);
124 paint.setAntiAlias(true);
125 paint.setStyle(SkPaint::kStroke_Style);
126
127 canvas->save();
128 canvas->translate(SkIntToScalar(10), SkIntToScalar(300));
129
130 paint.setStrokeWidth(SkIntToScalar(1));
131
132 static const SkScalar gAngles[] = {
133 0, 360,
134 0, 45,
135 0, -45,
136 720, 135,
137 -90, 269,
138 -90, 270,
139 -90, 271,
140 -180, -270,
141 225, 90
142 };
143
144 for (size_t i = 0; i < SK_ARRAY_COUNT(gAngles); i += 2) {
145 paint.setColor(SK_ColorBLACK);
146 DrawRectWithLines(canvas, r, paint);
147
148 paint.setColor(SK_ColorRED);
149 canvas->drawArc(r, gAngles[i], gAngles[i+1], false, paint);
150
151 DrawLabel(canvas, r, gAngles[i], gAngles[i+1]);
152
153 canvas->translate(w * 8 / 7, 0);
154 }
155
156 canvas->restore();
157 }
158
drawRoot(SkCanvas * canvas)159 void drawRoot(SkCanvas* canvas) {
160 SkPaint paint;
161 paint.setAntiAlias(true);
162 paint.setStrokeWidth(SkIntToScalar(2));
163 paint.setStyle(SkPaint::kStroke_Style);
164
165 DrawRectWithLines(canvas, fRect, paint);
166
167 canvas->drawDrawable(fAnimatingDrawable.get());
168
169 DrawArcs(canvas);
170 }
171
onOnceBeforeDraw()172 void onOnceBeforeDraw() override {
173 testparse();
174 fSweep = SkIntToScalar(100);
175 this->setBGColor(0xFFDDDDDD);
176
177 fRect.set(0, 0, SkIntToScalar(200), SkIntToScalar(200));
178 fRect.offset(SkIntToScalar(20), SkIntToScalar(20));
179 fAnimatingDrawable = sk_make_sp<MyDrawable>(fRect);
180
181 SkPictureRecorder recorder;
182 this->drawRoot(recorder.beginRecording(SkRect::MakeWH(800, 500)));
183 fRootDrawable = recorder.finishRecordingAsDrawable();
184 }
185
onDrawContent(SkCanvas * canvas)186 void onDrawContent(SkCanvas* canvas) override {
187 canvas->drawDrawable(fRootDrawable.get());
188 }
189
onAnimate(const SkAnimTimer & timer)190 bool onAnimate(const SkAnimTimer& timer) override {
191 SkScalar angle = SkDoubleToScalar(fmod(timer.secs() * 360 / 24, 360));
192 fAnimatingDrawable->setSweep(angle);
193 return true;
194 }
195
196 private:
197 SkScalar fSweep;
198
199 typedef Sample INHERITED;
200 };
201
202 //////////////////////////////////////////////////////////////////////////////
203
204 DEF_SAMPLE( return new ArcsView(); )
205