chromium/third_party/blink/renderer/core/animation_frame/worker_animation_frame_provider.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_FRAME_WORKER_ANIMATION_FRAME_PROVIDER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_FRAME_WORKER_ANIMATION_FRAME_PROVIDER_H_

#include "base/task/single_thread_task_runner.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/frame_request_callback_collection.h"
#include "third_party/blink/renderer/platform/graphics/begin_frame_provider.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_linked_hash_set.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"

namespace blink {

class OffscreenCanvas;

// WorkerAnimationFrameProvider is a member of WorkerGlobalScope and it provides
// RequestAnimationFrame capabilities to Workers.
//
// It's responsible for registering and dealing with callbacks.
// And maintains a connection with the Display process, through
// CompositorFrameSink, that is used to v-sync with the display.
//
// OffscreenCanvases can notify when there's been a change on any
// OffscreenCanvas that is connected to a Canvas, and this class signals
// OffscreenCanvases when it's time to dispatch frames.
class CORE_EXPORT WorkerAnimationFrameProvider
    : public GarbageCollected<WorkerAnimationFrameProvider>,
      public BeginFrameProviderClient { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_FRAME_WORKER_ANIMATION_FRAME_PROVIDER_H_