geometry_test_utils.cc revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
1// Copyright 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "cc/test/geometry_test_utils.h"
6
7#include "base/logging.h"
8#include "testing/gtest/include/gtest/gtest.h"
9#include "ui/gfx/transform.h"
10
11namespace cc {
12
13// NOTE: even though transform data types use double precision, we only check
14// for equality within single-precision error bounds because many transforms
15// originate from single-precision data types such as quads/rects/etc.
16
17void ExpectTransformationMatrixEq(const gfx::Transform& expected,
18                                  const gfx::Transform& actual) {
19  EXPECT_FLOAT_EQ((expected).matrix().getDouble(0, 0),
20                  (actual).matrix().getDouble(0, 0));
21  EXPECT_FLOAT_EQ((expected).matrix().getDouble(1, 0),
22                  (actual).matrix().getDouble(1, 0));
23  EXPECT_FLOAT_EQ((expected).matrix().getDouble(2, 0),
24                  (actual).matrix().getDouble(2, 0));
25  EXPECT_FLOAT_EQ((expected).matrix().getDouble(3, 0),
26                  (actual).matrix().getDouble(3, 0));
27  EXPECT_FLOAT_EQ((expected).matrix().getDouble(0, 1),
28                  (actual).matrix().getDouble(0, 1));
29  EXPECT_FLOAT_EQ((expected).matrix().getDouble(1, 1),
30                  (actual).matrix().getDouble(1, 1));
31  EXPECT_FLOAT_EQ((expected).matrix().getDouble(2, 1),
32                  (actual).matrix().getDouble(2, 1));
33  EXPECT_FLOAT_EQ((expected).matrix().getDouble(3, 1),
34                  (actual).matrix().getDouble(3, 1));
35  EXPECT_FLOAT_EQ((expected).matrix().getDouble(0, 2),
36                  (actual).matrix().getDouble(0, 2));
37  EXPECT_FLOAT_EQ((expected).matrix().getDouble(1, 2),
38                  (actual).matrix().getDouble(1, 2));
39  EXPECT_FLOAT_EQ((expected).matrix().getDouble(2, 2),
40                  (actual).matrix().getDouble(2, 2));
41  EXPECT_FLOAT_EQ((expected).matrix().getDouble(3, 2),
42                  (actual).matrix().getDouble(3, 2));
43  EXPECT_FLOAT_EQ((expected).matrix().getDouble(0, 3),
44                  (actual).matrix().getDouble(0, 3));
45  EXPECT_FLOAT_EQ((expected).matrix().getDouble(1, 3),
46                  (actual).matrix().getDouble(1, 3));
47  EXPECT_FLOAT_EQ((expected).matrix().getDouble(2, 3),
48                  (actual).matrix().getDouble(2, 3));
49  EXPECT_FLOAT_EQ((expected).matrix().getDouble(3, 3),
50                  (actual).matrix().getDouble(3, 3));
51}
52
53gfx::Transform Inverse(const gfx::Transform& transform) {
54  gfx::Transform result(gfx::Transform::kSkipInitialization);
55  bool inverted_successfully = transform.GetInverse(&result);
56  DCHECK(inverted_successfully);
57  return result;
58}
59
60}  // namespace cc
61