src/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   return make_scoped_ptr(new TransformAnimationCurveAdapter(
  31       tween_type_, initial_value_, target_value_, duration_));
  32 }
  33
  34 gfx::Transform TransformAnimationCurveAdapter::GetValue(
  35     double t) const {
  36   if (t >= duration_.InSecondsF())
  37     return target_value_;
  38   if (t <= 0.0)
  39     return initial_value_;
  40   double progress = t / duration_.InSecondsF();
  41
  42   gfx::DecomposedTransform to_return;
  43   gfx::BlendDecomposedTransforms(&to_return,
  44                                  decomposed_target_value_,
  45                                  decomposed_initial_value_,
  46                                  gfx::Tween::CalculateValue(tween_type_,
  47                                                             progress));
  48   return gfx::ComposeTransform(to_return);
  49 }
  50
  51 bool TransformAnimationCurveAdapter::AnimatedBoundsForBox(
  52     const gfx::BoxF& box,
  53     gfx::BoxF* bounds) const {
  54   // TODO(ajuma): Once cc::TransformOperation::BlendedBoundsForBox supports
  55   // computing bounds for TransformOperationMatrix, use that to compute
  56   // the bounds we need here.
  57   return false;
  58 }
  59
  60 bool TransformAnimationCurveAdapter::AffectsScale() const {
  61   return !initial_value_.IsIdentityOrTranslation() ||
  62          !target_value_.IsIdentityOrTranslation();
  63 }
  64
  65 bool TransformAnimationCurveAdapter::IsTranslation() const {
  66   return initial_value_.IsIdentityOrTranslation() &&
  67          target_value_.IsIdentityOrTranslation();
  68 }
  69
  70 bool TransformAnimationCurveAdapter::MaximumTargetScale(
  71     bool forward_direction,
  72     float* max_scale) const {
  73   return false;
  74 }
  75
  76 InverseTransformCurveAdapter::InverseTransformCurveAdapter(
  77     TransformAnimationCurveAdapter base_curve,
  78     gfx::Transform initial_value,
  79     base::TimeDelta duration)
  80     : base_curve_(base_curve),
  81       initial_value_(initial_value),
  82       duration_(duration) {
  83   effective_initial_value_ = base_curve_.GetValue(0.0) * initial_value_;
  84 }
  85
  86 InverseTransformCurveAdapter::~InverseTransformCurveAdapter() {
  87 }
  88
  89 double InverseTransformCurveAdapter::Duration() const {
  90   return duration_.InSeconds();
  91 }
  92
  93 scoped_ptr<cc::AnimationCurve> InverseTransformCurveAdapter::Clone() const {
  94   return make_scoped_ptr(
  95       new InverseTransformCurveAdapter(base_curve_, initial_value_, duration_));
  96 }
  97
  98 gfx::Transform InverseTransformCurveAdapter::GetValue(
  99     double t) const {
 100   if (t <= 0.0)
 101     return initial_value_;
 102
 103   gfx::Transform base_transform = base_curve_.GetValue(t);
 104   // Invert base
 105   gfx::Transform to_return(gfx::Transform::kSkipInitialization);
 106   bool is_invertible = base_transform.GetInverse(&to_return);
 107   DCHECK(is_invertible);
 108
 109   to_return.PreconcatTransform(effective_initial_value_);
 110   return to_return;
 111 }
 112
 113 bool InverseTransformCurveAdapter::AnimatedBoundsForBox(
 114     const gfx::BoxF& box,
 115     gfx::BoxF* bounds) const {
 116   // TODO(ajuma): Once cc::TransformOperation::BlendedBoundsForBox supports
 117   // computing bounds for TransformOperationMatrix, use that to compute
 118   // the bounds we need here.
 119   return false;
 120 }
 121
 122 bool InverseTransformCurveAdapter::AffectsScale() const {
 123   return !initial_value_.IsIdentityOrTranslation() ||
 124          base_curve_.AffectsScale();
 125 }
 126
 127 bool InverseTransformCurveAdapter::IsTranslation() const {
 128   return initial_value_.IsIdentityOrTranslation() &&
 129          base_curve_.IsTranslation();
 130 }
 131
 132 bool InverseTransformCurveAdapter::MaximumTargetScale(bool forward_direction,
 133                                                       float* max_scale) const {
 134   return false;
 135 }
 136
 137 }  // namespace ui