transform_animation_curve_adapter.cc revision 3551c9c881056c480085172ff9840cab31610854 
1// Copyright (c) 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 "ui/compositor/transform_animation_curve_adapter.h"
6
7namespace ui {
8
9TransformAnimationCurveAdapter::TransformAnimationCurveAdapter(
10    Tween::Type tween_type,
11    gfx::Transform initial_value,
12    gfx::Transform target_value,
13    base::TimeDelta duration)
14    : tween_type_(tween_type),
15      initial_value_(initial_value),
16      target_value_(target_value),
17      duration_(duration) {
18  gfx::DecomposeTransform(&decomposed_initial_value_, initial_value_);
19  gfx::DecomposeTransform(&decomposed_target_value_, target_value_);
20}
21
22TransformAnimationCurveAdapter::~TransformAnimationCurveAdapter() {
23}
24
25double TransformAnimationCurveAdapter::Duration() const {
26  return duration_.InSecondsF();
27}
28
29scoped_ptr<cc::AnimationCurve> TransformAnimationCurveAdapter::Clone() const {
30  scoped_ptr<TransformAnimationCurveAdapter> to_return(
31      new TransformAnimationCurveAdapter(tween_type_,
32                                         initial_value_,
33                                         target_value_,
34                                         duration_));
35  return to_return.PassAs<cc::AnimationCurve>();
36}
37
38gfx::Transform TransformAnimationCurveAdapter::GetValue(
39    double t) const {
40  if (t >= duration_.InSecondsF())
41    return target_value_;
42  if (t <= 0.0)
43    return initial_value_;
44  double progress = t / duration_.InSecondsF();
45
46  gfx::DecomposedTransform to_return;
47  gfx::BlendDecomposedTransforms(&to_return,
48                                 decomposed_target_value_,
49                                 decomposed_initial_value_,
50                                 Tween::CalculateValue(tween_type_, progress));
51  return gfx::ComposeTransform(to_return);
52}
53
54bool TransformAnimationCurveAdapter::AnimatedBoundsForBox(
55    const gfx::BoxF& box,
56    gfx::BoxF* bounds) const {
57  // TODO(ajuma): Once cc::TransformOperation::BlendedBoundsForBox supports
58  // computing bounds for TransformOperationMatrix, use that to compute
59  // the bounds we need here.
60  return false;
61}
62
63}  // namespace ui
64