ui/compositor/transform_animation_curve_adapter.cc

   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
   7 namespace ui {
   8
   9 TransformAnimationCurveAdapter::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
  22 TransformAnimationCurveAdapter::~TransformAnimationCurveAdapter() {
  23 }
  24
  25 double TransformAnimationCurveAdapter::Duration() const {
  26   return duration_.InSecondsF();
  27 }
  28
  29 scoped_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
  38 gfx::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
  54 }  // namespace ui