WebKit/Source/WebCore/workers/WorkerAnimationController.cpp at main · WebKit/WebKit · GitHub

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* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR

* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "config.h"

#include "WorkerAnimationController.h"

#if ENABLE(OFFSCREEN_CANVAS_IN_WORKERS)

#include "InspectorInstrumentation.h"

#include "Performance.h"

#include "RequestAnimationFrameCallback.h"

#include "WorkerGlobalScope.h"

#include <wtf/Ref.h>

namespace WebCore {

Ref<WorkerAnimationController> WorkerAnimationController::create(WorkerGlobalScope& workerGlobalScope)

{

auto controller = adoptRef(*new WorkerAnimationController(workerGlobalScope));

controller->suspendIfNeeded();

return controller;

}

WorkerAnimationController::WorkerAnimationController(WorkerGlobalScope& workerGlobalScope)

: ActiveDOMObject(&workerGlobalScope)

, m_workerGlobalScope(workerGlobalScope)

, m_animationTimer(*this, &WorkerAnimationController::animationTimerFired)

{

}

WorkerAnimationController::~WorkerAnimationController()

{

ASSERT(!hasPendingActivity());

}

bool WorkerAnimationController::virtualHasPendingActivity() const

{

return m_animationTimer.isActive();

}

void WorkerAnimationController::stop()

{

m_animationTimer.stop();

m_animationCallbacks.clear();

}

void WorkerAnimationController::suspend(ReasonForSuspension)

{

m_savedIsActive = hasPendingActivity();

stop();

}

void WorkerAnimationController::resume()

{

if (m_savedIsActive) {

m_savedIsActive = false;

scheduleAnimation();

}

WorkerAnimationController::CallbackId WorkerAnimationController::requestAnimationFrame(Ref<RequestAnimationFrameCallback>&& callback)

{

// FIXME: There's a lot of missing throttling behaviour that's present on DOMDocument

WorkerAnimationController::CallbackId callbackId = ++m_nextAnimationCallbackId;

callback->m_firedOrCancelled = false;

callback->m_id = callbackId;

m_animationCallbacks.append(WTF::move(callback));

InspectorInstrumentation::didRequestAnimationFrame(m_workerGlobalScope.get(), callbackId);

scheduleAnimation();

return callbackId;

}

void WorkerAnimationController::cancelAnimationFrame(CallbackId callbackId)

{

for (size_t i = 0; i < m_animationCallbacks.size(); ++i) {

auto& callback = m_animationCallbacks[i];

if (callback->m_id == callbackId) {

callback->m_firedOrCancelled = true;

m_animationCallbacks.removeAt(i);

InspectorInstrumentation::didCancelAnimationFrame(m_workerGlobalScope.get(), callbackId);

return;

}

void WorkerAnimationController::scheduleAnimation()

{

if (m_animationTimer.isActive())

return;

Seconds animationInterval = RequestAnimationFrameCallback::fullSpeedAnimationInterval;

Seconds scheduleDelay = std::max(animationInterval - Seconds::fromMilliseconds(protect(m_workerGlobalScope->performance())->now() - m_lastAnimationFrameTimestamp), 0_s);

m_animationTimer.startOneShot(scheduleDelay);

}

void WorkerAnimationController::animationTimerFired()

{

m_lastAnimationFrameTimestamp = protect(m_workerGlobalScope->performance())->now();

serviceRequestAnimationFrameCallbacks(m_lastAnimationFrameTimestamp);

}

void WorkerAnimationController::serviceRequestAnimationFrameCallbacks(DOMHighResTimeStamp timestamp)

{

if (!m_animationCallbacks.size())

return;

// First, generate a list of callbacks to consider. Callbacks registered from this point

// on are considered only for the "next" frame, not this one.

CallbackList callbacks(m_animationCallbacks);

for (auto& callback : callbacks) {

if (callback->m_firedOrCancelled)

continue;

callback->m_firedOrCancelled = true;

InspectorInstrumentation::willFireAnimationFrame(m_workerGlobalScope.get(), callback->m_id);

callback->invoke(timestamp);

InspectorInstrumentation::didFireAnimationFrame(m_workerGlobalScope.get(), callback->m_id);

}

// Remove any callbacks we fired from the list of pending callbacks.

m_animationCallbacks.removeAllMatching([](auto& callback) {

return callback->m_firedOrCancelled;

});

if (m_animationCallbacks.size())

scheduleAnimation();

}

} // namespace WebCore

#endif

WebKit/Source/WebCore/workers/WorkerAnimationController.cpp at main · WebKit/WebKit · GitHub

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