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// Copyright (c) 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 "ui/compositor/transform_animation_curve_adapter.h"
#include "cc/base/time_util.h"
namespace ui {
TransformAnimationCurveAdapter::TransformAnimationCurveAdapter(
gfx::Tween::Type tween_type,
gfx::Transform initial_value,
gfx::Transform target_value,
base::TimeDelta duration)
: tween_type_(tween_type),
initial_value_(initial_value),
target_value_(target_value),
duration_(duration) {
gfx::DecomposeTransform(&decomposed_initial_value_, initial_value_);
gfx::DecomposeTransform(&decomposed_target_value_, target_value_);
}
TransformAnimationCurveAdapter::~TransformAnimationCurveAdapter() {
}
base::TimeDelta TransformAnimationCurveAdapter::Duration() const {
return duration_;
}
scoped_ptr<cc::AnimationCurve> TransformAnimationCurveAdapter::Clone() const {
return make_scoped_ptr(new TransformAnimationCurveAdapter(
tween_type_, initial_value_, target_value_, duration_));
}
gfx::Transform TransformAnimationCurveAdapter::GetValue(
base::TimeDelta t) const {
if (t >= duration_)
return target_value_;
if (t <= base::TimeDelta())
return initial_value_;
double progress = cc::TimeUtil::Divide(t, duration_);
gfx::DecomposedTransform to_return;
gfx::BlendDecomposedTransforms(&to_return,
decomposed_target_value_,
decomposed_initial_value_,
gfx::Tween::CalculateValue(tween_type_,
progress));
return gfx::ComposeTransform(to_return);
}
bool TransformAnimationCurveAdapter::AnimatedBoundsForBox(
const gfx::BoxF& box,
gfx::BoxF* bounds) const {
// TODO(ajuma): Once cc::TransformOperation::BlendedBoundsForBox supports
// computing bounds for TransformOperationMatrix, use that to compute
// the bounds we need here.
return false;
}
bool TransformAnimationCurveAdapter::AffectsScale() const {
return !initial_value_.IsIdentityOrTranslation() ||
!target_value_.IsIdentityOrTranslation();
}
bool TransformAnimationCurveAdapter::IsTranslation() const {
return initial_value_.IsIdentityOrTranslation() &&
target_value_.IsIdentityOrTranslation();
}
bool TransformAnimationCurveAdapter::PreservesAxisAlignment() const {
return (initial_value_.IsIdentity() ||
initial_value_.IsScaleOrTranslation()) &&
(target_value_.IsIdentity() || target_value_.IsScaleOrTranslation());
}
bool TransformAnimationCurveAdapter::MaximumTargetScale(
bool forward_direction,
float* max_scale) const {
return false;
}
InverseTransformCurveAdapter::InverseTransformCurveAdapter(
TransformAnimationCurveAdapter base_curve,
gfx::Transform initial_value,
base::TimeDelta duration)
: base_curve_(base_curve),
initial_value_(initial_value),
duration_(duration) {
effective_initial_value_ =
base_curve_.GetValue(base::TimeDelta()) * initial_value_;
}
InverseTransformCurveAdapter::~InverseTransformCurveAdapter() {
}
base::TimeDelta InverseTransformCurveAdapter::Duration() const {
return duration_;
}
scoped_ptr<cc::AnimationCurve> InverseTransformCurveAdapter::Clone() const {
return make_scoped_ptr(
new InverseTransformCurveAdapter(base_curve_, initial_value_, duration_));
}
gfx::Transform InverseTransformCurveAdapter::GetValue(base::TimeDelta t) const {
if (t <= base::TimeDelta())
return initial_value_;
gfx::Transform base_transform = base_curve_.GetValue(t);
// Invert base
gfx::Transform to_return(gfx::Transform::kSkipInitialization);
bool is_invertible = base_transform.GetInverse(&to_return);
DCHECK(is_invertible);
to_return.PreconcatTransform(effective_initial_value_);
return to_return;
}
bool InverseTransformCurveAdapter::AnimatedBoundsForBox(
const gfx::BoxF& box,
gfx::BoxF* bounds) const {
// TODO(ajuma): Once cc::TransformOperation::BlendedBoundsForBox supports
// computing bounds for TransformOperationMatrix, use that to compute
// the bounds we need here.
return false;
}
bool InverseTransformCurveAdapter::AffectsScale() const {
return !initial_value_.IsIdentityOrTranslation() ||
base_curve_.AffectsScale();
}
bool InverseTransformCurveAdapter::IsTranslation() const {
return initial_value_.IsIdentityOrTranslation() &&
base_curve_.IsTranslation();
}
bool InverseTransformCurveAdapter::PreservesAxisAlignment() const {
return (initial_value_.IsIdentity() ||
initial_value_.IsScaleOrTranslation()) &&
(base_curve_.PreservesAxisAlignment());
}
bool InverseTransformCurveAdapter::MaximumTargetScale(bool forward_direction,
float* max_scale) const {
return false;
}
} // namespace ui
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