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/SkPaint.h"
11 #include "include/core/SkRect.h"
12 #include "include/core/SkScalar.h"
13 #include "include/core/SkSize.h"
14 #include "include/core/SkString.h"
15 #include "include/utils/SkRandom.h"
16 
17 namespace skiagm {
18 
19 #define W   400
20 #define H   400
21 #define N   100
22 
23 constexpr SkScalar SW = SkIntToScalar(W);
24 constexpr SkScalar SH = SkIntToScalar(H);
25 
26 class StrokeRectsGM : public GM {
27 public:
StrokeRectsGM()28     StrokeRectsGM() {}
29 
30 protected:
31 
onShortName()32     SkString onShortName() override {
33         return SkString("strokerects");
34     }
35 
onISize()36     SkISize onISize() override {
37         return SkISize::Make(W*2, H*2);
38     }
39 
rnd_rect(SkRect * r,SkRandom & rand)40     static void rnd_rect(SkRect* r, SkRandom& rand) {
41         SkScalar x = rand.nextUScalar1() * W;
42         SkScalar y = rand.nextUScalar1() * H;
43         SkScalar w = rand.nextUScalar1() * (W >> 2);
44         SkScalar h = rand.nextUScalar1() * (H >> 2);
45         SkScalar hoffset = rand.nextSScalar1();
46         SkScalar woffset = rand.nextSScalar1();
47 
48         r->setXYWH(x, y, w, h);
49         r->offset(-w/2 + woffset, -h/2 + hoffset);
50     }
51 
onDraw(SkCanvas * canvas)52     void onDraw(SkCanvas* canvas) override {
53         SkPaint paint;
54         paint.setStyle(SkPaint::kStroke_Style);
55 
56         for (int y = 0; y < 2; y++) {
57             paint.setAntiAlias(!!y);
58             for (int x = 0; x < 2; x++) {
59                 paint.setStrokeWidth(x * SkIntToScalar(3));
60 
61                 SkAutoCanvasRestore acr(canvas, true);
62                 canvas->translate(SW * x, SH * y);
63                 canvas->clipRect(SkRect::MakeLTRB(
64                         SkIntToScalar(2), SkIntToScalar(2)
65                         , SW - SkIntToScalar(2), SH - SkIntToScalar(2)
66                 ));
67 
68                 SkRandom rand;
69                 for (int i = 0; i < N; i++) {
70                     SkRect r;
71                     rnd_rect(&r, rand);
72                     canvas->drawRect(r, paint);
73                 }
74             }
75         }
76     }
77 
78 private:
79     using INHERITED = GM;
80 };
81 
82 //////////////////////////////////////////////////////////////////////////////
83 
84 DEF_GM( return new StrokeRectsGM; )
85 
86 }  // namespace skiagm
87