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 "SkDashPathEffect.h"
14 #include "SkShader.h"
15
setBitmapDash(SkPaint * paint,int width)16 static void setBitmapDash(SkPaint* paint, int width) {
17 SkColor c = paint->getColor();
18
19 SkBitmap bm;
20 bm.allocN32Pixels(2, 1);
21 bm.lockPixels();
22 *bm.getAddr32(0, 0) = SkPreMultiplyARGB(0xFF, SkColorGetR(c),
23 SkColorGetG(c), SkColorGetB(c));
24 *bm.getAddr32(1, 0) = 0;
25 bm.unlockPixels();
26
27 SkMatrix matrix;
28 matrix.setScale(SkIntToScalar(width), SK_Scalar1);
29
30 SkShader* s = SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
31 SkShader::kClamp_TileMode, &matrix);
32
33 paint->setShader(s)->unref();
34 }
35
36 class DashView : public SampleView {
37 public:
DashView()38 DashView() {
39 this->setBGColor(0xFFDDDDDD);
40 }
41
42 protected:
43 // overrides from SkEventSink
onQuery(SkEvent * evt)44 virtual bool onQuery(SkEvent* evt) {
45 if (SampleCode::TitleQ(*evt)) {
46 SampleCode::TitleR(evt, "Dash");
47 return true;
48 }
49 return this->INHERITED::onQuery(evt);
50 }
51
onDrawContent(SkCanvas * canvas)52 virtual void onDrawContent(SkCanvas* canvas) {
53 static const char* gStr[] = {
54 "11",
55 "44",
56 "112233",
57 "411327463524",
58 };
59
60 SkPaint paint;
61 paint.setStrokeWidth(SkIntToScalar(1));
62
63 SkScalar x0 = SkIntToScalar(10);
64 SkScalar y0 = SkIntToScalar(10);
65 SkScalar x1 = x0 + SkIntToScalar(1000);
66 for (size_t i = 0; i < SK_ARRAY_COUNT(gStr); i++) {
67 SkScalar interval[12];
68 size_t len = SkMin32(strlen(gStr[i]), SK_ARRAY_COUNT(interval));
69 for (size_t j = 0; j < len; j++) {
70 interval[j] = SkIntToScalar(gStr[i][j] - '0');
71 }
72
73 SkDashPathEffect dash(interval, len, 0);
74 paint.setPathEffect(&dash);
75 canvas->drawLine(x0, y0, x1, y0, paint);
76 paint.setPathEffect(nullptr);
77
78 y0 += paint.getStrokeWidth() * 3;
79 }
80
81 setBitmapDash(&paint, 3);
82 canvas->drawLine(x0, y0, x1, y0, paint);
83 }
84
85 private:
86 typedef SampleView INHERITED;
87 };
88
89 //////////////////////////////////////////////////////////////////////////////
90
MyFactory()91 static SkView* MyFactory() { return new DashView; }
92 static SkViewRegister reg(MyFactory);
93