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/*
Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "TextureMapperAnimation.h"
#include "LayoutSize.h"
namespace WebCore {
static RefPtr<FilterOperation> blendFunc(FilterOperation* fromOp, FilterOperation& toOp, double progress, const FloatSize&, bool blendToPassthrough = false)
{
return toOp.blend(fromOp, progress, blendToPassthrough);
}
static FilterOperations applyFilterAnimation(const FilterOperations& from, const FilterOperations& to, double progress, const FloatSize& boxSize)
{
// First frame of an animation.
if (!progress)
return from;
// Last frame of an animation.
if (progress == 1)
return to;
if (!from.isEmpty() && !to.isEmpty() && !from.operationsMatch(to))
return to;
FilterOperations result;
size_t fromSize = from.operations().size();
size_t toSize = to.operations().size();
size_t size = std::max(fromSize, toSize);
for (size_t i = 0; i < size; i++) {
RefPtr<FilterOperation> fromOp = (i < fromSize) ? from.operations()[i].get() : nullptr;
RefPtr<FilterOperation> toOp = (i < toSize) ? to.operations()[i].get() : nullptr;
RefPtr<FilterOperation> blendedOp = toOp ? blendFunc(fromOp.get(), *toOp, progress, boxSize) : (fromOp ? blendFunc(nullptr, *fromOp, progress, boxSize, true) : nullptr);
if (blendedOp)
result.operations().append(blendedOp);
else {
RefPtr<FilterOperation> identityOp = PassthroughFilterOperation::create();
if (progress > 0.5)
result.operations().append(toOp ? toOp : identityOp);
else
result.operations().append(fromOp ? fromOp : identityOp);
}
}
return result;
}
static bool shouldReverseAnimationValue(Animation::AnimationDirection direction, int loopCount)
{
return (direction == Animation::AnimationDirectionAlternate && loopCount & 1)
|| (direction == Animation::AnimationDirectionAlternateReverse && !(loopCount & 1))
|| direction == Animation::AnimationDirectionReverse;
}
static double normalizedAnimationValue(double runningTime, double duration, Animation::AnimationDirection direction, double iterationCount)
{
if (!duration)
return 0;
const int loopCount = runningTime / duration;
const double lastFullLoop = duration * double(loopCount);
const double remainder = runningTime - lastFullLoop;
// Ignore remainder when we've reached the end of animation.
const double normalized = (loopCount == iterationCount) ? 1.0 : (remainder / duration);
return shouldReverseAnimationValue(direction, loopCount) ? 1 - normalized : normalized;
}
static double normalizedAnimationValueForFillsForwards(double iterationCount, Animation::AnimationDirection direction)
{
if (direction == Animation::AnimationDirectionNormal)
return 1;
if (direction == Animation::AnimationDirectionReverse)
return 0;
return shouldReverseAnimationValue(direction, iterationCount) ? 1 : 0;
}
static float applyOpacityAnimation(float fromOpacity, float toOpacity, double progress)
{
// Optimization: special case the edge values (0 and 1).
if (progress == 1.0)
return toOpacity;
if (!progress)
return fromOpacity;
return fromOpacity + progress * (toOpacity - fromOpacity);
}
static TransformationMatrix applyTransformAnimation(const TransformOperations& from, const TransformOperations& to, double progress, const FloatSize& boxSize, bool listsMatch)
{
TransformationMatrix matrix;
// First frame of an animation.
if (!progress) {
from.apply(boxSize, matrix);
return matrix;
}
// Last frame of an animation.
if (progress == 1) {
to.apply(boxSize, matrix);
return matrix;
}
// If we have incompatible operation lists, we blend the resulting matrices.
if (!listsMatch) {
TransformationMatrix fromMatrix;
to.apply(boxSize, matrix);
from.apply(boxSize, fromMatrix);
matrix.blend(fromMatrix, progress);
return matrix;
}
// Animation to "-webkit-transform: none".
if (!to.size()) {
TransformOperations blended(from);
for (auto& operation : blended.operations())
operation->blend(nullptr, progress, true)->apply(matrix, boxSize);
return matrix;
}
// Animation from "-webkit-transform: none".
if (!from.size()) {
TransformOperations blended(to);
for (auto& operation : blended.operations())
operation->blend(nullptr, 1 - progress, true)->apply(matrix, boxSize);
return matrix;
}
// Normal animation with a matching operation list.
TransformOperations blended(to);
for (size_t i = 0; i < blended.operations().size(); ++i)
blended.operations()[i]->blend(from.at(i), progress, !from.at(i))->apply(matrix, boxSize);
return matrix;
}
static const TimingFunction& timingFunctionForAnimationValue(const AnimationValue& animationValue, const Animation& animation)
{
if (animationValue.timingFunction())
return *animationValue.timingFunction();
if (animation.timingFunction())
return *animation.timingFunction();
return CubicBezierTimingFunction::defaultTimingFunction();
}
TextureMapperAnimation::TextureMapperAnimation(const String& name, const KeyframeValueList& keyframes, const FloatSize& boxSize, const Animation& animation, bool listsMatch, MonotonicTime startTime, Seconds pauseTime, AnimationState state)
: m_name(name.isSafeToSendToAnotherThread() ? name : name.isolatedCopy())
, m_keyframes(keyframes)
, m_boxSize(boxSize)
, m_animation(Animation::create(animation))
, m_listsMatch(listsMatch)
, m_startTime(startTime)
, m_pauseTime(pauseTime)
, m_totalRunningTime(0_s)
, m_lastRefreshedTime(m_startTime)
, m_state(state)
{
}
TextureMapperAnimation::TextureMapperAnimation(const TextureMapperAnimation& other)
: m_name(other.m_name.isSafeToSendToAnotherThread() ? other.m_name : other.m_name.isolatedCopy())
, m_keyframes(other.m_keyframes)
, m_boxSize(other.m_boxSize)
, m_animation(Animation::create(*other.m_animation))
, m_listsMatch(other.m_listsMatch)
, m_startTime(other.m_startTime)
, m_pauseTime(other.m_pauseTime)
, m_totalRunningTime(other.m_totalRunningTime)
, m_lastRefreshedTime(other.m_lastRefreshedTime)
, m_state(other.m_state)
{
}
void TextureMapperAnimation::apply(ApplicationResult& applicationResults, MonotonicTime time)
{
if (!isActive())
return;
Seconds totalRunningTime = computeTotalRunningTime(time);
double normalizedValue = normalizedAnimationValue(totalRunningTime.seconds(), m_animation->duration(), m_animation->direction(), m_animation->iterationCount());
if (m_animation->iterationCount() != Animation::IterationCountInfinite && totalRunningTime.seconds() >= m_animation->duration() * m_animation->iterationCount()) {
m_state = AnimationState::Stopped;
m_pauseTime = 0_s;
if (m_animation->fillsForwards())
normalizedValue = normalizedAnimationValueForFillsForwards(m_animation->iterationCount(), m_animation->direction());
}
applicationResults.hasRunningAnimations |= (m_state == AnimationState::Playing);
if (!normalizedValue) {
applyInternal(applicationResults, m_keyframes.at(0), m_keyframes.at(1), 0);
return;
}
if (normalizedValue == 1.0) {
applyInternal(applicationResults, m_keyframes.at(m_keyframes.size() - 2), m_keyframes.at(m_keyframes.size() - 1), 1);
return;
}
if (m_keyframes.size() == 2) {
auto& timingFunction = timingFunctionForAnimationValue(m_keyframes.at(0), *m_animation);
normalizedValue = timingFunction.transformTime(normalizedValue, m_animation->duration());
applyInternal(applicationResults, m_keyframes.at(0), m_keyframes.at(1), normalizedValue);
return;
}
for (size_t i = 0; i < m_keyframes.size() - 1; ++i) {
const AnimationValue& from = m_keyframes.at(i);
const AnimationValue& to = m_keyframes.at(i + 1);
if (from.keyTime() > normalizedValue || to.keyTime() < normalizedValue)
continue;
normalizedValue = (normalizedValue - from.keyTime()) / (to.keyTime() - from.keyTime());
auto& timingFunction = timingFunctionForAnimationValue(from, *m_animation);
normalizedValue = timingFunction.transformTime(normalizedValue, m_animation->duration());
applyInternal(applicationResults, from, to, normalizedValue);
break;
}
}
void TextureMapperAnimation::pause(Seconds time)
{
m_state = AnimationState::Paused;
m_pauseTime = time;
}
void TextureMapperAnimation::resume()
{
m_state = AnimationState::Playing;
// FIXME: This seems wrong. m_totalRunningTime is cleared.
// https://bugs.webkit.org/show_bug.cgi?id=183113
m_pauseTime = 0_s;
m_totalRunningTime = m_pauseTime;
m_lastRefreshedTime = MonotonicTime::now();
}
Seconds TextureMapperAnimation::computeTotalRunningTime(MonotonicTime time)
{
if (m_state == AnimationState::Paused)
return m_pauseTime;
MonotonicTime oldLastRefreshedTime = m_lastRefreshedTime;
m_lastRefreshedTime = time;
m_totalRunningTime += m_lastRefreshedTime - oldLastRefreshedTime;
return m_totalRunningTime;
}
bool TextureMapperAnimation::isActive() const
{
return m_state != AnimationState::Stopped || m_animation->fillsForwards();
}
void TextureMapperAnimation::applyInternal(ApplicationResult& applicationResults, const AnimationValue& from, const AnimationValue& to, float progress)
{
switch (m_keyframes.property()) {
case AnimatedPropertyTransform:
applicationResults.transform = applyTransformAnimation(static_cast<const TransformAnimationValue&>(from).value(), static_cast<const TransformAnimationValue&>(to).value(), progress, m_boxSize, m_listsMatch);
return;
case AnimatedPropertyOpacity:
applicationResults.opacity = applyOpacityAnimation((static_cast<const FloatAnimationValue&>(from).value()), (static_cast<const FloatAnimationValue&>(to).value()), progress);
return;
case AnimatedPropertyFilter:
applicationResults.filters = applyFilterAnimation(static_cast<const FilterAnimationValue&>(from).value(), static_cast<const FilterAnimationValue&>(to).value(), progress, m_boxSize);
return;
default:
ASSERT_NOT_REACHED();
}
}
void TextureMapperAnimations::add(const TextureMapperAnimation& animation)
{
// Remove the old state if we are resuming a paused animation.
remove(animation.name(), animation.keyframes().property());
m_animations.append(animation);
}
void TextureMapperAnimations::remove(const String& name)
{
m_animations.removeAllMatching([&name] (const TextureMapperAnimation& animation) {
return animation.name() == name;
});
}
void TextureMapperAnimations::remove(const String& name, AnimatedPropertyID property)
{
m_animations.removeAllMatching([&name, property] (const TextureMapperAnimation& animation) {
return animation.name() == name && animation.keyframes().property() == property;
});
}
void TextureMapperAnimations::pause(const String& name, Seconds offset)
{
for (auto& animation : m_animations) {
if (animation.name() == name)
animation.pause(offset);
}
}
void TextureMapperAnimations::suspend(MonotonicTime time)
{
// FIXME: This seems wrong. `pause` takes time offset (Seconds), not MonotonicTime.
// https://bugs.webkit.org/show_bug.cgi?id=183112
for (auto& animation : m_animations)
animation.pause(time.secondsSinceEpoch());
}
void TextureMapperAnimations::resume()
{
for (auto& animation : m_animations)
animation.resume();
}
void TextureMapperAnimations::apply(TextureMapperAnimation::ApplicationResult& applicationResults, MonotonicTime time)
{
for (auto& animation : m_animations)
animation.apply(applicationResults, time);
}
bool TextureMapperAnimations::hasActiveAnimationsOfType(AnimatedPropertyID type) const
{
return std::any_of(m_animations.begin(), m_animations.end(),
[&type](const TextureMapperAnimation& animation) { return animation.isActive() && animation.keyframes().property() == type; });
}
bool TextureMapperAnimations::hasRunningAnimations() const
{
return std::any_of(m_animations.begin(), m_animations.end(),
[](const TextureMapperAnimation& animation) { return animation.state() == TextureMapperAnimation::AnimationState::Playing; });
}
TextureMapperAnimations TextureMapperAnimations::getActiveAnimations() const
{
TextureMapperAnimations active;
for (auto& animation : m_animations) {
if (animation.isActive())
active.add(animation);
}
return active;
}
} // namespace WebCore