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// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <algorithm>
#include "cc/animation/keyframed_animation_curve.h"
#include "cc/base/time_util.h"
#include "ui/gfx/animation/tween.h"
#include "ui/gfx/geometry/box_f.h"
namespace cc {
namespace {
template <class KeyframeType>
void InsertKeyframe(scoped_ptr<KeyframeType> keyframe,
ScopedPtrVector<KeyframeType>* keyframes) {
// Usually, the keyframes will be added in order, so this loop would be
// unnecessary and we should skip it if possible.
if (!keyframes->empty() && keyframe->Time() < keyframes->back()->Time()) {
for (size_t i = 0; i < keyframes->size(); ++i) {
if (keyframe->Time() < keyframes->at(i)->Time()) {
keyframes->insert(keyframes->begin() + i, keyframe.Pass());
return;
}
}
}
keyframes->push_back(keyframe.Pass());
}
template <typename KeyframeType>
base::TimeDelta TransformedAnimationTime(
const ScopedPtrVector<KeyframeType>& keyframes,
const scoped_ptr<TimingFunction>& timing_function,
base::TimeDelta time) {
if (timing_function) {
base::TimeDelta start_time = keyframes.front()->Time();
base::TimeDelta duration =
keyframes.back()->Time() - keyframes.front()->Time();
double progress = TimeUtil::Divide(time - start_time, duration);
time = TimeUtil::Scale(duration, timing_function->GetValue(progress)) +
start_time;
}
return time;
}
template <typename KeyframeType>
size_t GetActiveKeyframe(const ScopedPtrVector<KeyframeType>& keyframes,
base::TimeDelta time) {
DCHECK_GE(keyframes.size(), 2ul);
size_t i = 0;
for (; i < keyframes.size() - 2; ++i) { // Last keyframe is never active.
if (time < keyframes[i + 1]->Time())
break;
}
return i;
}
template <typename KeyframeType>
double TransformedKeyframeProgress(
const ScopedPtrVector<KeyframeType>& keyframes,
base::TimeDelta time,
size_t i) {
double progress =
TimeUtil::Divide(time - keyframes[i]->Time(),
keyframes[i + 1]->Time() - keyframes[i]->Time());
if (keyframes[i]->timing_function()) {
progress = keyframes[i]->timing_function()->GetValue(progress);
}
return progress;
}
} // namespace
Keyframe::Keyframe(base::TimeDelta time,
scoped_ptr<TimingFunction> timing_function)
: time_(time), timing_function_(timing_function.Pass()) {
}
Keyframe::~Keyframe() {}
base::TimeDelta Keyframe::Time() const {
return time_;
}
scoped_ptr<ColorKeyframe> ColorKeyframe::Create(
base::TimeDelta time,
SkColor value,
scoped_ptr<TimingFunction> timing_function) {
return make_scoped_ptr(
new ColorKeyframe(time, value, timing_function.Pass()));
}
ColorKeyframe::ColorKeyframe(base::TimeDelta time,
SkColor value,
scoped_ptr<TimingFunction> timing_function)
: Keyframe(time, timing_function.Pass()), value_(value) {
}
ColorKeyframe::~ColorKeyframe() {}
SkColor ColorKeyframe::Value() const { return value_; }
scoped_ptr<ColorKeyframe> ColorKeyframe::Clone() const {
scoped_ptr<TimingFunction> func;
if (timing_function())
func = timing_function()->Clone();
return ColorKeyframe::Create(Time(), Value(), func.Pass());
}
scoped_ptr<FloatKeyframe> FloatKeyframe::Create(
base::TimeDelta time,
float value,
scoped_ptr<TimingFunction> timing_function) {
return make_scoped_ptr(
new FloatKeyframe(time, value, timing_function.Pass()));
}
FloatKeyframe::FloatKeyframe(base::TimeDelta time,
float value,
scoped_ptr<TimingFunction> timing_function)
: Keyframe(time, timing_function.Pass()), value_(value) {
}
FloatKeyframe::~FloatKeyframe() {}
float FloatKeyframe::Value() const {
return value_;
}
scoped_ptr<FloatKeyframe> FloatKeyframe::Clone() const {
scoped_ptr<TimingFunction> func;
if (timing_function())
func = timing_function()->Clone();
return FloatKeyframe::Create(Time(), Value(), func.Pass());
}
scoped_ptr<TransformKeyframe> TransformKeyframe::Create(
base::TimeDelta time,
const TransformOperations& value,
scoped_ptr<TimingFunction> timing_function) {
return make_scoped_ptr(
new TransformKeyframe(time, value, timing_function.Pass()));
}
TransformKeyframe::TransformKeyframe(base::TimeDelta time,
const TransformOperations& value,
scoped_ptr<TimingFunction> timing_function)
: Keyframe(time, timing_function.Pass()), value_(value) {
}
TransformKeyframe::~TransformKeyframe() {}
const TransformOperations& TransformKeyframe::Value() const {
return value_;
}
scoped_ptr<TransformKeyframe> TransformKeyframe::Clone() const {
scoped_ptr<TimingFunction> func;
if (timing_function())
func = timing_function()->Clone();
return TransformKeyframe::Create(Time(), Value(), func.Pass());
}
scoped_ptr<FilterKeyframe> FilterKeyframe::Create(
base::TimeDelta time,
const FilterOperations& value,
scoped_ptr<TimingFunction> timing_function) {
return make_scoped_ptr(
new FilterKeyframe(time, value, timing_function.Pass()));
}
FilterKeyframe::FilterKeyframe(base::TimeDelta time,
const FilterOperations& value,
scoped_ptr<TimingFunction> timing_function)
: Keyframe(time, timing_function.Pass()), value_(value) {
}
FilterKeyframe::~FilterKeyframe() {}
const FilterOperations& FilterKeyframe::Value() const {
return value_;
}
scoped_ptr<FilterKeyframe> FilterKeyframe::Clone() const {
scoped_ptr<TimingFunction> func;
if (timing_function())
func = timing_function()->Clone();
return FilterKeyframe::Create(Time(), Value(), func.Pass());
}
scoped_ptr<KeyframedColorAnimationCurve> KeyframedColorAnimationCurve::
Create() {
return make_scoped_ptr(new KeyframedColorAnimationCurve);
}
KeyframedColorAnimationCurve::KeyframedColorAnimationCurve() {}
KeyframedColorAnimationCurve::~KeyframedColorAnimationCurve() {}
void KeyframedColorAnimationCurve::AddKeyframe(
scoped_ptr<ColorKeyframe> keyframe) {
InsertKeyframe(keyframe.Pass(), &keyframes_);
}
base::TimeDelta KeyframedColorAnimationCurve::Duration() const {
return keyframes_.back()->Time() - keyframes_.front()->Time();
}
scoped_ptr<AnimationCurve> KeyframedColorAnimationCurve::Clone() const {
scoped_ptr<KeyframedColorAnimationCurve> to_return =
KeyframedColorAnimationCurve::Create();
for (size_t i = 0; i < keyframes_.size(); ++i)
to_return->AddKeyframe(keyframes_[i]->Clone());
if (timing_function_)
to_return->SetTimingFunction(timing_function_->Clone());
return to_return.Pass();
}
SkColor KeyframedColorAnimationCurve::GetValue(base::TimeDelta t) const {
if (t <= keyframes_.front()->Time())
return keyframes_.front()->Value();
if (t >= keyframes_.back()->Time())
return keyframes_.back()->Value();
t = TransformedAnimationTime(keyframes_, timing_function_, t);
size_t i = GetActiveKeyframe(keyframes_, t);
double progress = TransformedKeyframeProgress(keyframes_, t, i);
return gfx::Tween::ColorValueBetween(
progress, keyframes_[i]->Value(), keyframes_[i + 1]->Value());
}
// KeyframedFloatAnimationCurve
scoped_ptr<KeyframedFloatAnimationCurve> KeyframedFloatAnimationCurve::
Create() {
return make_scoped_ptr(new KeyframedFloatAnimationCurve);
}
KeyframedFloatAnimationCurve::KeyframedFloatAnimationCurve() {}
KeyframedFloatAnimationCurve::~KeyframedFloatAnimationCurve() {}
void KeyframedFloatAnimationCurve::AddKeyframe(
scoped_ptr<FloatKeyframe> keyframe) {
InsertKeyframe(keyframe.Pass(), &keyframes_);
}
base::TimeDelta KeyframedFloatAnimationCurve::Duration() const {
return keyframes_.back()->Time() - keyframes_.front()->Time();
}
scoped_ptr<AnimationCurve> KeyframedFloatAnimationCurve::Clone() const {
scoped_ptr<KeyframedFloatAnimationCurve> to_return =
KeyframedFloatAnimationCurve::Create();
for (size_t i = 0; i < keyframes_.size(); ++i)
to_return->AddKeyframe(keyframes_[i]->Clone());
if (timing_function_)
to_return->SetTimingFunction(timing_function_->Clone());
return to_return.Pass();
}
float KeyframedFloatAnimationCurve::GetValue(base::TimeDelta t) const {
if (t <= keyframes_.front()->Time())
return keyframes_.front()->Value();
if (t >= keyframes_.back()->Time())
return keyframes_.back()->Value();
t = TransformedAnimationTime(keyframes_, timing_function_, t);
size_t i = GetActiveKeyframe(keyframes_, t);
double progress = TransformedKeyframeProgress(keyframes_, t, i);
return keyframes_[i]->Value() +
(keyframes_[i+1]->Value() - keyframes_[i]->Value()) * progress;
}
scoped_ptr<KeyframedTransformAnimationCurve> KeyframedTransformAnimationCurve::
Create() {
return make_scoped_ptr(new KeyframedTransformAnimationCurve);
}
KeyframedTransformAnimationCurve::KeyframedTransformAnimationCurve() {}
KeyframedTransformAnimationCurve::~KeyframedTransformAnimationCurve() {}
void KeyframedTransformAnimationCurve::AddKeyframe(
scoped_ptr<TransformKeyframe> keyframe) {
InsertKeyframe(keyframe.Pass(), &keyframes_);
}
base::TimeDelta KeyframedTransformAnimationCurve::Duration() const {
return keyframes_.back()->Time() - keyframes_.front()->Time();
}
scoped_ptr<AnimationCurve> KeyframedTransformAnimationCurve::Clone() const {
scoped_ptr<KeyframedTransformAnimationCurve> to_return =
KeyframedTransformAnimationCurve::Create();
for (size_t i = 0; i < keyframes_.size(); ++i)
to_return->AddKeyframe(keyframes_[i]->Clone());
if (timing_function_)
to_return->SetTimingFunction(timing_function_->Clone());
return to_return.Pass();
}
gfx::Transform KeyframedTransformAnimationCurve::GetValue(
base::TimeDelta t) const {
if (t <= keyframes_.front()->Time())
return keyframes_.front()->Value().Apply();
if (t >= keyframes_.back()->Time())
return keyframes_.back()->Value().Apply();
t = TransformedAnimationTime(keyframes_, timing_function_, t);
size_t i = GetActiveKeyframe(keyframes_, t);
double progress = TransformedKeyframeProgress(keyframes_, t, i);
return keyframes_[i + 1]->Value().Blend(keyframes_[i]->Value(), progress);
}
bool KeyframedTransformAnimationCurve::AnimatedBoundsForBox(
const gfx::BoxF& box,
gfx::BoxF* bounds) const {
DCHECK_GE(keyframes_.size(), 2ul);
*bounds = gfx::BoxF();
for (size_t i = 0; i < keyframes_.size() - 1; ++i) {
gfx::BoxF bounds_for_step;
float min_progress = 0.0;
float max_progress = 1.0;
if (keyframes_[i]->timing_function())
keyframes_[i]->timing_function()->Range(&min_progress, &max_progress);
if (!keyframes_[i+1]->Value().BlendedBoundsForBox(box,
keyframes_[i]->Value(),
min_progress,
max_progress,
&bounds_for_step))
return false;
bounds->Union(bounds_for_step);
}
return true;
}
bool KeyframedTransformAnimationCurve::AffectsScale() const {
for (size_t i = 0; i < keyframes_.size(); ++i) {
if (keyframes_[i]->Value().AffectsScale())
return true;
}
return false;
}
bool KeyframedTransformAnimationCurve::IsTranslation() const {
for (size_t i = 0; i < keyframes_.size(); ++i) {
if (!keyframes_[i]->Value().IsTranslation() &&
!keyframes_[i]->Value().IsIdentity())
return false;
}
return true;
}
bool KeyframedTransformAnimationCurve::MaximumTargetScale(
bool forward_direction,
float* max_scale) const {
DCHECK_GE(keyframes_.size(), 2ul);
*max_scale = 0.f;
// If |forward_direction| is true, then skip the first frame, otherwise
// skip the last frame, since that is the original position in the animation.
size_t start = 1;
size_t end = keyframes_.size();
if (!forward_direction) {
--start;
--end;
}
for (size_t i = start; i < end; ++i) {
gfx::Vector3dF target_scale_for_segment;
if (!keyframes_[i]->Value().ScaleComponent(&target_scale_for_segment))
return false;
float max_scale_for_segment =
fmax(std::abs(target_scale_for_segment.x()),
fmax(std::abs(target_scale_for_segment.y()),
std::abs(target_scale_for_segment.z())));
*max_scale = fmax(*max_scale, max_scale_for_segment);
}
return true;
}
scoped_ptr<KeyframedFilterAnimationCurve> KeyframedFilterAnimationCurve::
Create() {
return make_scoped_ptr(new KeyframedFilterAnimationCurve);
}
KeyframedFilterAnimationCurve::KeyframedFilterAnimationCurve() {}
KeyframedFilterAnimationCurve::~KeyframedFilterAnimationCurve() {}
void KeyframedFilterAnimationCurve::AddKeyframe(
scoped_ptr<FilterKeyframe> keyframe) {
InsertKeyframe(keyframe.Pass(), &keyframes_);
}
base::TimeDelta KeyframedFilterAnimationCurve::Duration() const {
return keyframes_.back()->Time() - keyframes_.front()->Time();
}
scoped_ptr<AnimationCurve> KeyframedFilterAnimationCurve::Clone() const {
scoped_ptr<KeyframedFilterAnimationCurve> to_return =
KeyframedFilterAnimationCurve::Create();
for (size_t i = 0; i < keyframes_.size(); ++i)
to_return->AddKeyframe(keyframes_[i]->Clone());
if (timing_function_)
to_return->SetTimingFunction(timing_function_->Clone());
return to_return.Pass();
}
FilterOperations KeyframedFilterAnimationCurve::GetValue(
base::TimeDelta t) const {
if (t <= keyframes_.front()->Time())
return keyframes_.front()->Value();
if (t >= keyframes_.back()->Time())
return keyframes_.back()->Value();
t = TransformedAnimationTime(keyframes_, timing_function_, t);
size_t i = GetActiveKeyframe(keyframes_, t);
double progress = TransformedKeyframeProgress(keyframes_, t, i);
return keyframes_[i + 1]->Value().Blend(keyframes_[i]->Value(), progress);
}
bool KeyframedFilterAnimationCurve::HasFilterThatMovesPixels() const {
for (size_t i = 0; i < keyframes_.size(); ++i) {
if (keyframes_[i]->Value().HasFilterThatMovesPixels()) {
return true;
}
}
return false;
}
} // namespace cc