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