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
9
10
11#include "gm.h"
12#include "SkRandom.h"
13
14namespace skiagm {
15
16#define W   400
17#define H   400
18#define N   100
19
20static const SkScalar SW = SkIntToScalar(W);
21static const SkScalar SH = SkIntToScalar(H);
22
23class StrokeRectsGM : public GM {
24public:
25    StrokeRectsGM() {}
26
27protected:
28
29    SkString onShortName() override {
30        return SkString("strokerects");
31    }
32
33    SkISize onISize() override {
34        return SkISize::Make(W*2, H*2);
35    }
36
37    static void rnd_rect(SkRect* r, SkRandom& rand) {
38        SkScalar x = rand.nextUScalar1() * W;
39        SkScalar y = rand.nextUScalar1() * H;
40        SkScalar w = rand.nextUScalar1() * (W >> 2);
41        SkScalar h = rand.nextUScalar1() * (H >> 2);
42        SkScalar hoffset = rand.nextSScalar1();
43        SkScalar woffset = rand.nextSScalar1();
44
45        r->set(x, y, x + w, y + h);
46        r->offset(-w/2 + woffset, -h/2 + hoffset);
47    }
48
49    void onDraw(SkCanvas* canvas) override {
50        SkPaint paint;
51        paint.setStyle(SkPaint::kStroke_Style);
52
53        for (int y = 0; y < 2; y++) {
54            paint.setAntiAlias(!!y);
55            for (int x = 0; x < 2; x++) {
56                paint.setStrokeWidth(x * SkIntToScalar(3));
57
58                SkAutoCanvasRestore acr(canvas, true);
59                canvas->translate(SW * x, SH * y);
60                canvas->clipRect(SkRect::MakeLTRB(
61                        SkIntToScalar(2), SkIntToScalar(2)
62                        , SW - SkIntToScalar(2), SH - SkIntToScalar(2)
63                ));
64
65                SkRandom rand;
66                for (int i = 0; i < N; i++) {
67                    SkRect r;
68                    rnd_rect(&r, rand);
69                    canvas->drawRect(r, paint);
70                }
71            }
72        }
73    }
74
75private:
76    typedef GM INHERITED;
77};
78
79//////////////////////////////////////////////////////////////////////////////
80
81static GM* MyFactory(void*) { return new StrokeRectsGM; }
82static GMRegistry reg(MyFactory);
83
84}
85