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 
9 
10 #include "gm.h"
11 #include "SkRandom.h"
12 
13 namespace skiagm {
14 
15 #define W   400
16 #define H   400
17 #define N   100
18 
19 constexpr SkScalar SW = SkIntToScalar(W);
20 constexpr SkScalar SH = SkIntToScalar(H);
21 
22 class StrokeRectsGM : public GM {
23 public:
24     StrokeRectsGM() {}
25 
26 protected:
27 
28     SkString onShortName() override {
29         return SkString("strokerects");
30     }
31 
32     SkISize onISize() override {
33         return SkISize::Make(W*2, H*2);
34     }
35 
36     static void rnd_rect(SkRect* r, SkRandom& rand) {
37         SkScalar x = rand.nextUScalar1() * W;
38         SkScalar y = rand.nextUScalar1() * H;
39         SkScalar w = rand.nextUScalar1() * (W >> 2);
40         SkScalar h = rand.nextUScalar1() * (H >> 2);
41         SkScalar hoffset = rand.nextSScalar1();
42         SkScalar woffset = rand.nextSScalar1();
43 
44         r->set(x, y, x + w, y + h);
45         r->offset(-w/2 + woffset, -h/2 + hoffset);
46     }
47 
48     void onDraw(SkCanvas* canvas) override {
49         SkPaint paint;
50         paint.setStyle(SkPaint::kStroke_Style);
51 
52         for (int y = 0; y < 2; y++) {
53             paint.setAntiAlias(!!y);
54             for (int x = 0; x < 2; x++) {
55                 paint.setStrokeWidth(x * SkIntToScalar(3));
56 
57                 SkAutoCanvasRestore acr(canvas, true);
58                 canvas->translate(SW * x, SH * y);
59                 canvas->clipRect(SkRect::MakeLTRB(
60                         SkIntToScalar(2), SkIntToScalar(2)
61                         , SW - SkIntToScalar(2), SH - SkIntToScalar(2)
62                 ));
63 
64                 SkRandom rand;
65                 for (int i = 0; i < N; i++) {
66                     SkRect r;
67                     rnd_rect(&r, rand);
68                     canvas->drawRect(r, paint);
69                 }
70             }
71         }
72     }
73 
74 private:
75     typedef GM INHERITED;
76 };
77 
78 //////////////////////////////////////////////////////////////////////////////
79 
80 static GM* MyFactory(void*) { return new StrokeRectsGM; }
81 static GMRegistry reg(MyFactory);
82 
83 }
84