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 "Test.h"
9 #include "TestClassDef.h"
10 #include "SkGeometry.h"
11
nearly_equal(const SkPoint & a,const SkPoint & b)12 static bool nearly_equal(const SkPoint& a, const SkPoint& b) {
13 return SkScalarNearlyEqual(a.fX, b.fX) && SkScalarNearlyEqual(a.fY, b.fY);
14 }
15
testChopCubic(skiatest::Reporter * reporter)16 static void testChopCubic(skiatest::Reporter* reporter) {
17 /*
18 Inspired by this test, which used to assert that the tValues had dups
19
20 <path stroke="#202020" d="M0,0 C0,0 1,1 2190,5130 C2190,5070 2220,5010 2205,4980" />
21 */
22 const SkPoint src[] = {
23 { SkIntToScalar(2190), SkIntToScalar(5130) },
24 { SkIntToScalar(2190), SkIntToScalar(5070) },
25 { SkIntToScalar(2220), SkIntToScalar(5010) },
26 { SkIntToScalar(2205), SkIntToScalar(4980) },
27 };
28 SkPoint dst[13];
29 SkScalar tValues[3];
30 // make sure we don't assert internally
31 int count = SkChopCubicAtMaxCurvature(src, dst, tValues);
32 if (false) { // avoid bit rot, suppress warning
33 REPORTER_ASSERT(reporter, count);
34 }
35 }
36
DEF_TEST(Geometry,reporter)37 DEF_TEST(Geometry, reporter) {
38 SkPoint pts[3], dst[5];
39
40 pts[0].set(0, 0);
41 pts[1].set(100, 50);
42 pts[2].set(0, 100);
43
44 int count = SkChopQuadAtMaxCurvature(pts, dst);
45 REPORTER_ASSERT(reporter, count == 1 || count == 2);
46
47 pts[0].set(0, 0);
48 pts[1].set(SkIntToScalar(3), 0);
49 pts[2].set(SkIntToScalar(3), SkIntToScalar(3));
50 SkConvertQuadToCubic(pts, dst);
51 const SkPoint cubic[] = {
52 { 0, 0, },
53 { SkIntToScalar(2), 0, },
54 { SkIntToScalar(3), SkIntToScalar(1), },
55 { SkIntToScalar(3), SkIntToScalar(3) },
56 };
57 for (int i = 0; i < 4; ++i) {
58 REPORTER_ASSERT(reporter, nearly_equal(cubic[i], dst[i]));
59 }
60
61 testChopCubic(reporter);
62 }
63