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