cc/test/geometry_test_utils.cc

   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
  11 namespace 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
  17 void ExpectTransformationMatrixEq(const gfx::Transform& expected,
  18                                   const gfx::Transform& actual)
  19 {
  20     EXPECT_FLOAT_EQ((expected).matrix().getDouble(0, 0), (actual).matrix().getDouble(0, 0));
  21     EXPECT_FLOAT_EQ((expected).matrix().getDouble(1, 0), (actual).matrix().getDouble(1, 0));
  22     EXPECT_FLOAT_EQ((expected).matrix().getDouble(2, 0), (actual).matrix().getDouble(2, 0));
  23     EXPECT_FLOAT_EQ((expected).matrix().getDouble(3, 0), (actual).matrix().getDouble(3, 0));
  24     EXPECT_FLOAT_EQ((expected).matrix().getDouble(0, 1), (actual).matrix().getDouble(0, 1));
  25     EXPECT_FLOAT_EQ((expected).matrix().getDouble(1, 1), (actual).matrix().getDouble(1, 1));
  26     EXPECT_FLOAT_EQ((expected).matrix().getDouble(2, 1), (actual).matrix().getDouble(2, 1));
  27     EXPECT_FLOAT_EQ((expected).matrix().getDouble(3, 1), (actual).matrix().getDouble(3, 1));
  28     EXPECT_FLOAT_EQ((expected).matrix().getDouble(0, 2), (actual).matrix().getDouble(0, 2));
  29     EXPECT_FLOAT_EQ((expected).matrix().getDouble(1, 2), (actual).matrix().getDouble(1, 2));
  30     EXPECT_FLOAT_EQ((expected).matrix().getDouble(2, 2), (actual).matrix().getDouble(2, 2));
  31     EXPECT_FLOAT_EQ((expected).matrix().getDouble(3, 2), (actual).matrix().getDouble(3, 2));
  32     EXPECT_FLOAT_EQ((expected).matrix().getDouble(0, 3), (actual).matrix().getDouble(0, 3));
  33     EXPECT_FLOAT_EQ((expected).matrix().getDouble(1, 3), (actual).matrix().getDouble(1, 3));
  34     EXPECT_FLOAT_EQ((expected).matrix().getDouble(2, 3), (actual).matrix().getDouble(2, 3));
  35     EXPECT_FLOAT_EQ((expected).matrix().getDouble(3, 3), (actual).matrix().getDouble(3, 3));
  36 }
  37
  38 gfx::Transform inverse(const gfx::Transform& transform)
  39 {
  40     gfx::Transform result(gfx::Transform::kSkipInitialization);
  41     bool invertedSuccessfully = transform.GetInverse(&result);
  42     DCHECK(invertedSuccessfully);
  43     return result;
  44 }
  45
  46 }  // namespace cc