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 "SkPath.h"
11 #include "SkRandom.h"
12 
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 DEF_SIMPLE_GM(hittestpath, canvas, 700, 460) {
33         SkPath path;
34         SkRandom rand;
35 
36         int scale = 300;
37         for (int i = 0; i < 4; ++i) {
38             // get the random values deterministically
39             SkScalar randoms[12];
40             for (int index = 0; index < (int) SK_ARRAY_COUNT(randoms); ++index) {
41                 randoms[index] = rand.nextUScalar1();
42             }
43             path.lineTo(randoms[0] * scale, randoms[1] * scale);
44             path.quadTo(randoms[2] * scale, randoms[3] * scale,
45                         randoms[4] * scale, randoms[5] * scale);
46             path.cubicTo(randoms[6] * scale, randoms[7] * scale,
47                          randoms[8] * scale, randoms[9] * scale,
48                          randoms[10] * scale, randoms[11] * scale);
49         }
50 
51         path.setFillType(SkPath::kEvenOdd_FillType);
52         path.offset(SkIntToScalar(20), SkIntToScalar(20));
53 
54         test_hittest(canvas, path);
55 
56         canvas->translate(SkIntToScalar(scale), 0);
57         path.setFillType(SkPath::kWinding_FillType);
58 
59         test_hittest(canvas, path);
60 }
61