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    virtual uint32_t onGetFlags() const SK_OVERRIDE {
29        return kSkipTiled_Flag;
30    }
31
32    virtual SkString onShortName() {
33        return SkString("strokerects");
34    }
35
36    virtual SkISize onISize() {
37        return SkISize::Make(W*2, H*2);
38    }
39
40    static void rnd_rect(SkRect* r, SkLCGRandom& 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->set(x, y, x + w, y + h);
49        r->offset(-w/2 + woffset, -h/2 + hoffset);
50    }
51
52    virtual void onDraw(SkCanvas* canvas) {
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                SkLCGRandom 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
78private:
79    typedef GM INHERITED;
80};
81
82//////////////////////////////////////////////////////////////////////////////
83
84static GM* MyFactory(void*) { return new StrokeRectsGM; }
85static GMRegistry reg(MyFactory);
86
87}
88