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 "SkRandom.h"
9 #include "SkRect.h"
10 #include "Test.h"
11
make_zero()12 static float make_zero() {
13 return sk_float_sin(0);
14 }
15
16 struct RectCenter {
17 SkIRect fRect;
18 SkIPoint fCenter;
19 };
20
test_center(skiatest::Reporter * reporter)21 static void test_center(skiatest::Reporter* reporter) {
22 static const RectCenter gData[] = {
23 { { 0, 0, 0, 0 }, { 0, 0 } },
24 { { 0, 0, 1, 1 }, { 0, 0 } },
25 { { -1, -1, 0, 0 }, { -1, -1 } },
26 { { 0, 0, 10, 7 }, { 5, 3 } },
27 { { 0, 0, 11, 6 }, { 5, 3 } },
28 };
29 for (size_t index = 0; index < SK_ARRAY_COUNT(gData); ++index) {
30 REPORTER_ASSERT(reporter,
31 gData[index].fRect.centerX() == gData[index].fCenter.x());
32 REPORTER_ASSERT(reporter,
33 gData[index].fRect.centerY() == gData[index].fCenter.y());
34 }
35
36 SkRandom rand;
37 for (int i = 0; i < 10000; ++i) {
38 SkIRect r;
39
40 r.set(rand.nextS() >> 2, rand.nextS() >> 2,
41 rand.nextS() >> 2, rand.nextS() >> 2);
42 int cx = r.centerX();
43 int cy = r.centerY();
44 REPORTER_ASSERT(reporter, ((r.left() + r.right()) >> 1) == cx);
45 REPORTER_ASSERT(reporter, ((r.top() + r.bottom()) >> 1) == cy);
46 }
47 }
48
check_invalid(skiatest::Reporter * reporter,SkScalar l,SkScalar t,SkScalar r,SkScalar b)49 static void check_invalid(skiatest::Reporter* reporter,
50 SkScalar l, SkScalar t, SkScalar r, SkScalar b) {
51 SkRect rect;
52 rect.set(l, t, r, b);
53 REPORTER_ASSERT(reporter, !rect.isFinite());
54 }
55
56 // Tests that isFinite() will reject any rect with +/-inf values
57 // as one of its coordinates.
DEF_TEST(InfRect,reporter)58 DEF_TEST(InfRect, reporter) {
59 float inf = 1 / make_zero(); // infinity
60 float nan = inf * 0;
61 SkASSERT(!(nan == nan));
62 SkScalar small = SkIntToScalar(10);
63 SkScalar big = SkIntToScalar(100);
64
65 REPORTER_ASSERT(reporter, SkRect::MakeEmpty().isFinite());
66
67 SkRect rect = SkRect::MakeXYWH(small, small, big, big);
68 REPORTER_ASSERT(reporter, rect.isFinite());
69
70 const SkScalar invalid[] = { nan, inf, -inf };
71 for (size_t i = 0; i < SK_ARRAY_COUNT(invalid); ++i) {
72 check_invalid(reporter, small, small, big, invalid[i]);
73 check_invalid(reporter, small, small, invalid[i], big);
74 check_invalid(reporter, small, invalid[i], big, big);
75 check_invalid(reporter, invalid[i], small, big, big);
76 }
77
78 test_center(reporter);
79 }
80
81 // need tests for SkStrSearch
82