1// Copyright 2013 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 "ui/compositor/transform_animation_curve_adapter.h" 6 7#include <sstream> 8 9#include "base/time/time.h" 10#include "testing/gtest/include/gtest/gtest.h" 11#include "ui/compositor/test/test_utils.h" 12 13namespace ui { 14 15namespace { 16 17// Check that the inverse transform curve gives the gives a transform that when 18// applied on top of the parent transform gives the original transform 19TEST(InverseTransformCurveAdapterTest, InversesTransform) { 20 gfx::Transform parent_start, parent_target; 21 parent_start.Scale(0.5, 3.0); 22 parent_start.Translate(-20.0, 30.0); 23 parent_target.Translate(0, 100); 24 25 gfx::Transform child_transform; 26 child_transform.Rotate(-30.0); 27 28 base::TimeDelta duration = base::TimeDelta::FromSeconds(1); 29 30 const gfx::Transform effective_child_transform = 31 parent_start * child_transform; 32 33 TransformAnimationCurveAdapter parent_curve(gfx::Tween::LINEAR, 34 parent_start, 35 parent_target, 36 duration); 37 38 InverseTransformCurveAdapter child_curve(parent_curve, 39 child_transform, 40 duration); 41 static const int kSteps = 1000; 42 double step = 1.0 / kSteps; 43 for (int i = 0; i <= kSteps ; ++i) { 44 std::ostringstream message; 45 message << "Step " << i << " of " << kSteps; 46 SCOPED_TRACE(message.str()); 47 gfx::Transform progress_parent_transform = 48 parent_curve.GetValue(i*step); 49 gfx::Transform progress_child_transform = 50 child_curve.GetValue(i*step); 51 CheckApproximatelyEqual(effective_child_transform, 52 progress_parent_transform * 53 progress_child_transform); 54 } 55} 56 57} // namespace 58 59} // namespace ui 60