PathOpsBoundsTest.cpp revision 07393cab57ce74a4aae89a31fae9aaa9780fc19d 
1/*
2 * Copyright 2013 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#include "SkPathOpsBounds.h"
8#include "Test.h"
9
10static const SkRect sectTests[][2] = {
11    {{2, 0, 4, 1}, {4, 0, 6, 1}},
12    {{2, 0, 4, 1}, {3, 0, 5, 1}},
13    {{2, 0, 4, 1}, {3, 0, 5, 0}},
14    {{2, 0, 4, 1}, {3, 1, 5, 2}},
15    {{2, 1, 4, 2}, {1, 0, 5, 3}},
16    {{2, 1, 5, 3}, {3, 1, 4, 2}},
17    {{2, 0, 4, 1}, {3, 0, 3, 0}},  // intersecting an empty bounds is OK
18    {{2, 0, 4, 1}, {4, 1, 5, 2}},  // touching just on a corner is OK
19};
20
21static const size_t sectTestsCount = sizeof(sectTests) / sizeof(sectTests[0]);
22
23static const SkRect noSectTests[][2] = {
24    {{2, 0, 4, 1}, {5, 0, 6, 1}},
25    {{2, 0, 4, 1}, {3, 2, 5, 2}},
26};
27
28static const size_t noSectTestsCount = sizeof(noSectTests) / sizeof(noSectTests[0]);
29
30static const SkRect reallyEmpty[] = {
31    {0, 0, 0, 0},
32    {1, 1, 1, 0},
33    {1, 1, 0, 1},
34    {1, 1, 0, 0},
35    {1, 2, 3, SK_ScalarNaN},
36};
37
38static const size_t emptyTestsCount = sizeof(reallyEmpty) / sizeof(reallyEmpty[0]);
39
40static const SkRect notReallyEmpty[] = {
41    {0, 0, 1, 0},
42    {0, 0, 0, 1},
43    {0, 0, 1, 1},
44};
45
46static const size_t notEmptyTestsCount = sizeof(notReallyEmpty) / sizeof(notReallyEmpty[0]);
47
48static void OpBoundsTest(skiatest::Reporter* reporter) {
49    for (size_t index = 0; index < sectTestsCount; ++index) {
50        const SkPathOpsBounds& bounds1 = static_cast<const SkPathOpsBounds&>(sectTests[index][0]);
51        const SkPathOpsBounds& bounds2 = static_cast<const SkPathOpsBounds&>(sectTests[index][1]);
52        bool touches = SkPathOpsBounds::Intersects(bounds1, bounds2);
53        REPORTER_ASSERT(reporter, touches);
54    }
55    for (size_t index = 0; index < noSectTestsCount; ++index) {
56        const SkPathOpsBounds& bounds1 = static_cast<const SkPathOpsBounds&>(noSectTests[index][0]);
57        const SkPathOpsBounds& bounds2 = static_cast<const SkPathOpsBounds&>(noSectTests[index][1]);
58        bool touches = SkPathOpsBounds::Intersects(bounds1, bounds2);
59        REPORTER_ASSERT(reporter, !touches);
60    }
61    SkPathOpsBounds bounds;
62    bounds.setEmpty();
63    bounds.add(1, 2, 3, 4);
64    SkPathOpsBounds expected;
65    expected.set(0, 0, 3, 4);
66    REPORTER_ASSERT(reporter, bounds == expected);
67    bounds.setEmpty();
68    SkPathOpsBounds ordinal;
69    ordinal.set(1, 2, 3, 4);
70    bounds.add(ordinal);
71    REPORTER_ASSERT(reporter, bounds == expected);
72    SkPoint topLeft = {0, 0};
73    bounds.setPointBounds(topLeft);
74    SkPoint botRight = {3, 4};
75    bounds.add(botRight);
76    REPORTER_ASSERT(reporter, bounds == expected);
77    for (size_t index = 0; index < emptyTestsCount; ++index) {
78        const SkPathOpsBounds& bounds = static_cast<const SkPathOpsBounds&>(reallyEmpty[index]);
79        bool empty = bounds.isReallyEmpty();
80        REPORTER_ASSERT(reporter, empty);
81    }
82    for (size_t index = 0; index < notEmptyTestsCount; ++index) {
83        const SkPathOpsBounds& bounds = static_cast<const SkPathOpsBounds&>(notReallyEmpty[index]);
84        bool empty = bounds.isReallyEmpty();
85        REPORTER_ASSERT(reporter, !empty);
86    }
87    const SkPoint curvePts[] = {{0, 0}, {1, 2}, {3, 4}, {5, 6}};
88    bounds.setLineBounds(curvePts);
89    expected.set(0, 0, 1, 2);
90    REPORTER_ASSERT(reporter, bounds == expected);
91    (bounds.*SetCurveBounds[1])(curvePts);
92    REPORTER_ASSERT(reporter, bounds == expected);
93    bounds.setQuadBounds(curvePts);
94    expected.set(0, 0, 3, 4);
95    REPORTER_ASSERT(reporter, bounds == expected);
96    (bounds.*SetCurveBounds[2])(curvePts);
97    REPORTER_ASSERT(reporter, bounds == expected);
98    bounds.setCubicBounds(curvePts);
99    expected.set(0, 0, 5, 6);
100    REPORTER_ASSERT(reporter, bounds == expected);
101    (bounds.*SetCurveBounds[3])(curvePts);
102    REPORTER_ASSERT(reporter, bounds == expected);
103}
104
105#include "TestClassDef.h"
106DEFINE_TESTCLASS("PathOpsBounds", PathOpsBoundsClass, OpBoundsTest)
107