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 "gm/gm.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkPaint.h"
12 #include "include/core/SkPoint.h"
13 #include "include/core/SkScalar.h"
14 #include "include/core/SkSize.h"
15 #include "include/core/SkString.h"
16 #include "include/utils/SkRandom.h"
17
18 #include <stddef.h>
19
20 namespace skiagm {
21
22 class PointsGM : public GM {
23 public:
PointsGM()24 PointsGM() {}
25
26 protected:
27
28 SkString onShortName() override {
29 return SkString("points");
30 }
31
32 SkISize onISize() override {
33 return SkISize::Make(640, 490);
34 }
35
fill_pts(SkPoint pts[], size_t n, SkRandom* rand)36 static void fill_pts(SkPoint pts[], size_t n, SkRandom* rand) {
37 for (size_t i = 0; i < n; i++) {
38 // Compute these independently and store in variables, rather
39 // than in the parameter-passing expression, to get consistent
40 // evaluation order across compilers.
41 SkScalar y = rand->nextUScalar1() * 480;
42 SkScalar x = rand->nextUScalar1() * 640;
43 pts[i].set(x, y);
44 }
45 }
46
47 void onDraw(SkCanvas* canvas) override {
48 canvas->translate(SK_Scalar1, SK_Scalar1);
49
50 SkRandom rand;
51 SkPaint p0, p1, p2, p3;
52 const size_t n = 99;
53
54 p0.setColor(SK_ColorRED);
55 p1.setColor(SK_ColorGREEN);
56 p2.setColor(SK_ColorBLUE);
57 p3.setColor(SK_ColorWHITE);
58
59 p0.setStrokeWidth(SkIntToScalar(4));
60 p2.setStrokeCap(SkPaint::kRound_Cap);
61 p2.setStrokeWidth(SkIntToScalar(6));
62
63 SkPoint* pts = new SkPoint[n];
64 fill_pts(pts, n, &rand);
65
66 canvas->drawPoints(SkCanvas::kPolygon_PointMode, n, pts, p0);
67 canvas->drawPoints(SkCanvas::kLines_PointMode, n, pts, p1);
68 canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p2);
69 canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p3);
70
71 delete[] pts;
72 }
73
74 private:
75 using INHERITED = GM;
76 };
77 DEF_GM( return new PointsGM; )
78 } // namespace skiagm
79
80 #include "include/core/SkMaskFilter.h"
81
DEF_SIMPLE_GM(points_maskfilter, canvas, 512, 256)82 DEF_SIMPLE_GM(points_maskfilter, canvas, 512, 256) {
83 constexpr int N = 30;
84 SkPoint pts[N];
85
86 SkRandom rand;
87 for (SkPoint& p : pts) {
88 p.fX = rand.nextF() * 220 + 18;
89 p.fY = rand.nextF() * 220 + 18;
90 }
91
92 auto mf = SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 6);
93 const SkPaint::Cap caps[] = { SkPaint::kSquare_Cap, SkPaint::kRound_Cap };
94
95 SkPaint paint;
96 paint.setAntiAlias(true);
97 paint.setStroke(true);
98 paint.setStrokeWidth(10);
99
100 for (auto cap : caps) {
101 paint.setStrokeCap(cap);
102
103 paint.setMaskFilter(mf);
104 paint.setColor(SK_ColorBLACK);
105 canvas->drawPoints(SkCanvas::kPoints_PointMode, N, pts, paint);
106
107 paint.setMaskFilter(nullptr);
108 paint.setColor(SK_ColorRED);
109 canvas->drawPoints(SkCanvas::kPoints_PointMode, N, pts, paint);
110
111 canvas->translate(256, 0);
112 }
113 }
114