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 bool TransformAnimationCurveAdapter::AffectsScale() const {
  65   return !initial_value_.IsIdentityOrTranslation() ||
  66          !target_value_.IsIdentityOrTranslation();
  67 }
  68
  69 bool TransformAnimationCurveAdapter::IsTranslation() const {
  70   return initial_value_.IsIdentityOrTranslation() &&
  71          target_value_.IsIdentityOrTranslation();
  72 }
  73
  74 bool TransformAnimationCurveAdapter::MaximumScale(float* max_scale) const {
  75   return false;
  76 }
  77
  78 InverseTransformCurveAdapter::InverseTransformCurveAdapter(
  79     TransformAnimationCurveAdapter base_curve,
  80     gfx::Transform initial_value,
  81     base::TimeDelta duration)
  82     : base_curve_(base_curve),
  83       initial_value_(initial_value),
  84       duration_(duration) {
  85   effective_initial_value_ = base_curve_.GetValue(0.0) * initial_value_;
  86 }
  87
  88 InverseTransformCurveAdapter::~InverseTransformCurveAdapter() {
  89 }
  90
  91 double InverseTransformCurveAdapter::Duration() const {
  92   return duration_.InSeconds();
  93 }
  94
  95 scoped_ptr<cc::AnimationCurve> InverseTransformCurveAdapter::Clone() const {
  96   scoped_ptr<InverseTransformCurveAdapter> to_return(
  97       new InverseTransformCurveAdapter(base_curve_,
  98                                        initial_value_,
  99                                        duration_));
 100   return to_return.PassAs<cc::AnimationCurve>();
 101 }
 102
 103 gfx::Transform InverseTransformCurveAdapter::GetValue(
 104     double t) const {
 105   if (t <= 0.0)
 106     return initial_value_;
 107
 108   gfx::Transform base_transform = base_curve_.GetValue(t);
 109   // Invert base
 110   gfx::Transform to_return(gfx::Transform::kSkipInitialization);
 111   bool is_invertible = base_transform.GetInverse(&to_return);
 112   DCHECK(is_invertible);
 113
 114   to_return.PreconcatTransform(effective_initial_value_);
 115   return to_return;
 116 }
 117
 118 bool InverseTransformCurveAdapter::AnimatedBoundsForBox(
 119     const gfx::BoxF& box,
 120     gfx::BoxF* bounds) const {
 121   // TODO(ajuma): Once cc::TransformOperation::BlendedBoundsForBox supports
 122   // computing bounds for TransformOperationMatrix, use that to compute
 123   // the bounds we need here.
 124   return false;
 125 }
 126
 127 bool InverseTransformCurveAdapter::AffectsScale() const {
 128   return !initial_value_.IsIdentityOrTranslation() ||
 129          base_curve_.AffectsScale();
 130 }
 131
 132 bool InverseTransformCurveAdapter::IsTranslation() const {
 133   return initial_value_.IsIdentityOrTranslation() &&
 134          base_curve_.IsTranslation();
 135 }
 136
 137 bool InverseTransformCurveAdapter::MaximumScale(float* max_scale) const {
 138   return false;
 139 }
 140
 141 }  // namespace ui