1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "Test.h"
9#include "SkGeometry.h"
10
11static bool nearly_equal(const SkPoint& a, const SkPoint& b) {
12    return SkScalarNearlyEqual(a.fX, b.fX) && SkScalarNearlyEqual(a.fY, b.fY);
13}
14
15static 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
36
37static void TestGeometry(skiatest::Reporter* 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
64#include "TestClassDef.h"
65DEFINE_TESTCLASS("Geometry", GeometryTestClass, TestGeometry)
66