aboutsummaryrefslogtreecommitdiffhomepage
path: root/gm/hittestpath.cpp
blob: d971db9282b1ff2852f9ea1c7b2cabc9ad2b4f43 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "gm.h"
#include "SkCanvas.h"
#include "SkCullPoints.h"
#include "SkRandom.h"

static void test_hittest(SkCanvas* canvas, const SkPath& path) {
    SkPaint paint;
    SkRect r = path.getBounds();

    paint.setColor(SK_ColorRED);
    canvas->drawPath(path, paint);

    const SkScalar MARGIN = SkIntToScalar(4);

    paint.setColor(0x800000FF);
    for (SkScalar y = r.fTop + SK_ScalarHalf - MARGIN; y < r.fBottom + MARGIN; y += SK_Scalar1) {
        for (SkScalar x = r.fLeft + SK_ScalarHalf - MARGIN; x < r.fRight + MARGIN; x += SK_Scalar1) {
            if (path.contains(x, y)) {
                canvas->drawPoint(x, y, paint);
            }
        }
    }
}

class HitTestPathGM : public skiagm::GM {
public:
    HitTestPathGM () {}

protected:
    virtual uint32_t onGetFlags() const SK_OVERRIDE {
        return kSkipTiled_Flag;
    }

    virtual SkString onShortName() {
        return SkString("hittestpath");
    }

    virtual SkISize onISize() { return SkISize::Make(700, 460); }

    virtual void onDraw(SkCanvas* canvas) {
        SkPath path;
        SkLCGRandom rand;

        int scale = 300;
        for (int i = 0; i < 4; ++i) {
            path.lineTo(rand.nextUScalar1() * scale, rand.nextUScalar1() * scale);
            path.quadTo(rand.nextUScalar1() * scale, rand.nextUScalar1() * scale,
                        rand.nextUScalar1() * scale, rand.nextUScalar1() * scale);
            path.cubicTo(rand.nextUScalar1() * scale, rand.nextUScalar1() * scale,
                         rand.nextUScalar1() * scale, rand.nextUScalar1() * scale,
                         rand.nextUScalar1() * scale, rand.nextUScalar1() * scale);
        }

        path.setFillType(SkPath::kEvenOdd_FillType);
        path.offset(SkIntToScalar(20), SkIntToScalar(20));

        test_hittest(canvas, path);

        canvas->translate(SkIntToScalar(scale), 0);
        path.setFillType(SkPath::kWinding_FillType);

        test_hittest(canvas, path);
    }

private:
    typedef GM INHERITED;
};

//////////////////////////////////////////////////////////////////////////////

static skiagm::GM* MyFactory(void*) { return new HitTestPathGM; }
static skiagm::GMRegistry reg(MyFactory);