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