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     gfx::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                                  gfx::Tween::CalculateValue(tween_type_,
  51                                                             progress));
  52   return gfx::ComposeTransform(to_return);
  53 }
  54
  55 bool TransformAnimationCurveAdapter::AnimatedBoundsForBox(
  56     const gfx::BoxF& box,
  57     gfx::BoxF* bounds) const {
  58   // TODO(ajuma): Once cc::TransformOperation::BlendedBoundsForBox supports
  59   // computing bounds for TransformOperationMatrix, use that to compute
  60   // the bounds we need here.
  61   return false;
  62 }
  63
  64 InverseTransformCurveAdapter::InverseTransformCurveAdapter(
  65     TransformAnimationCurveAdapter base_curve,
  66     gfx::Transform initial_value,
  67     base::TimeDelta duration)
  68     : base_curve_(base_curve),
  69       initial_value_(initial_value),
  70       duration_(duration) {
  71   effective_initial_value_ = base_curve_.GetValue(0.0) * initial_value_;
  72 }
  73
  74 InverseTransformCurveAdapter::~InverseTransformCurveAdapter() {
  75 }
  76
  77 double InverseTransformCurveAdapter::Duration() const {
  78   return duration_.InSeconds();
  79 }
  80
  81 scoped_ptr<cc::AnimationCurve> InverseTransformCurveAdapter::Clone() const {
  82   scoped_ptr<InverseTransformCurveAdapter> to_return(
  83       new InverseTransformCurveAdapter(base_curve_,
  84                                        initial_value_,
  85                                        duration_));
  86   return to_return.PassAs<cc::AnimationCurve>();
  87 }
  88
  89 gfx::Transform InverseTransformCurveAdapter::GetValue(
  90     double t) const {
  91   if (t <= 0.0)
  92     return initial_value_;
  93
  94   gfx::Transform base_transform = base_curve_.GetValue(t);
  95   // Invert base
  96   gfx::Transform to_return(gfx::Transform::kSkipInitialization);
  97   bool is_invertible = base_transform.GetInverse(&to_return);
  98   DCHECK(is_invertible);
  99
 100   to_return.PreconcatTransform(effective_initial_value_);
 101   return to_return;
 102 }
 103
 104 bool InverseTransformCurveAdapter::AnimatedBoundsForBox(
 105     const gfx::BoxF& box,
 106     gfx::BoxF* bounds) const {
 107   // TODO(ajuma): Once cc::TransformOperation::BlendedBoundsForBox supports
 108   // computing bounds for TransformOperationMatrix, use that to compute
 109   // the bounds we need here.
 110   return false;
 111 }
 112
 113 }  // namespace ui