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().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
  53 gfx::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