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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.h"
9 #include "SkCanvas.h"
10 #include "SkCullPoints.h"
11 #include "SkRandom.h"
12 
test_hittest(SkCanvas * canvas,const SkPath & path)13 static void test_hittest(SkCanvas* canvas, const SkPath& path) {
14     SkPaint paint;
15     SkRect r = path.getBounds();
16 
17     paint.setColor(SK_ColorRED);
18     canvas->drawPath(path, paint);
19 
20     const SkScalar MARGIN = SkIntToScalar(4);
21 
22     paint.setColor(0x800000FF);
23     for (SkScalar y = r.fTop + SK_ScalarHalf - MARGIN; y < r.fBottom + MARGIN; y += SK_Scalar1) {
24         for (SkScalar x = r.fLeft + SK_ScalarHalf - MARGIN; x < r.fRight + MARGIN; x += SK_Scalar1) {
25             if (path.contains(x, y)) {
26                 canvas->drawPoint(x, y, paint);
27             }
28         }
29     }
30 }
31 
32 class HitTestPathGM : public skiagm::GM {
33 public:
HitTestPathGM()34     HitTestPathGM () {}
35 
36 protected:
onGetFlags() const37     virtual uint32_t onGetFlags() const SK_OVERRIDE {
38         return kSkipTiled_Flag;
39     }
40 
onShortName()41     virtual SkString onShortName() {
42         return SkString("hittestpath");
43     }
44 
onISize()45     virtual SkISize onISize() { return SkISize::Make(700, 460); }
46 
onDraw(SkCanvas * canvas)47     virtual void onDraw(SkCanvas* canvas) {
48         SkPath path;
49         SkLCGRandom rand;
50 
51         int scale = 300;
52         for (int i = 0; i < 4; ++i) {
53             path.lineTo(rand.nextUScalar1() * scale, rand.nextUScalar1() * scale);
54             path.quadTo(rand.nextUScalar1() * scale, rand.nextUScalar1() * scale,
55                         rand.nextUScalar1() * scale, rand.nextUScalar1() * scale);
56             path.cubicTo(rand.nextUScalar1() * scale, rand.nextUScalar1() * scale,
57                          rand.nextUScalar1() * scale, rand.nextUScalar1() * scale,
58                          rand.nextUScalar1() * scale, rand.nextUScalar1() * scale);
59         }
60 
61         path.setFillType(SkPath::kEvenOdd_FillType);
62         path.offset(SkIntToScalar(20), SkIntToScalar(20));
63 
64         test_hittest(canvas, path);
65 
66         canvas->translate(SkIntToScalar(scale), 0);
67         path.setFillType(SkPath::kWinding_FillType);
68 
69         test_hittest(canvas, path);
70     }
71 
72 private:
73     typedef GM INHERITED;
74 };
75 
76 //////////////////////////////////////////////////////////////////////////////
77 
MyFactory(void *)78 static skiagm::GM* MyFactory(void*) { return new HitTestPathGM; }
79 static skiagm::GMRegistry reg(MyFactory);
80