| // Copyright 2018 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 "third_party/blink/renderer/platform/graphics/begin_frame_provider.h" |
| |
| #include "base/single_thread_task_runner.h" |
| #include "third_party/blink/public/platform/interface_provider.h" |
| #include "third_party/blink/public/platform/platform.h" |
| #include "third_party/blink/renderer/platform/scheduler/public/thread_scheduler.h" |
| #include "third_party/blink/renderer/platform/web_task_runner.h" |
| |
| namespace blink { |
| |
| BeginFrameProvider::BeginFrameProvider( |
| const BeginFrameProviderParams& begin_frame_provider_params, |
| BeginFrameProviderClient* client) |
| : needs_begin_frame_(false), |
| cfs_binding_(this), |
| efs_binding_(this), |
| frame_sink_id_(begin_frame_provider_params.frame_sink_id), |
| parent_frame_sink_id_(begin_frame_provider_params.parent_frame_sink_id), |
| begin_frame_client_(client) {} |
| |
| void BeginFrameProvider::CreateCompositorFrameSink() { |
| DCHECK(frame_sink_id_.is_valid()); |
| |
| mojom::blink::EmbeddedFrameSinkProviderPtr provider; |
| Platform::Current()->GetInterfaceProvider()->GetInterface( |
| mojo::MakeRequest(&provider)); |
| |
| scoped_refptr<base::SingleThreadTaskRunner> task_runner; |
| auto* scheduler = blink::Platform::Current()->CurrentThread()->Scheduler(); |
| if (scheduler) |
| task_runner = scheduler->CompositorTaskRunner(); |
| |
| mojom::blink::EmbeddedFrameSinkClientPtr efs_client; |
| efs_binding_.Bind(mojo::MakeRequest(&efs_client), task_runner); |
| |
| viz::mojom::blink::CompositorFrameSinkClientPtr client; |
| cfs_binding_.Bind(mojo::MakeRequest(&client), task_runner); |
| |
| provider->CreateSimpleCompositorFrameSink( |
| parent_frame_sink_id_, frame_sink_id_, std::move(efs_client), |
| std::move(client), mojo::MakeRequest(&compositor_frame_sink_)); |
| } |
| |
| void BeginFrameProvider::RequestBeginFrame() { |
| if (needs_begin_frame_) |
| return; |
| |
| if (!compositor_frame_sink_.is_bound()) { |
| CreateCompositorFrameSink(); |
| if (!compositor_frame_sink_.is_bound()) { |
| return; |
| } |
| } |
| |
| needs_begin_frame_ = true; |
| compositor_frame_sink_->SetNeedsBeginFrame(true); |
| } |
| |
| void BeginFrameProvider::OnBeginFrame(const viz::BeginFrameArgs& args) { |
| // TODO(fserb): we could potentially be nicer here. |
| DCHECK(compositor_frame_sink_.is_bound()); |
| |
| // OnBeginFrame sometimes happens without a request. So we just skip it. |
| if (needs_begin_frame_) { |
| needs_begin_frame_ = false; |
| compositor_frame_sink_->SetNeedsBeginFrame(false); |
| |
| begin_frame_client_->BeginFrame(); |
| } |
| |
| viz::BeginFrameAck ack; |
| ack.source_id = args.source_id; |
| ack.sequence_number = args.sequence_number; |
| ack.has_damage = false; |
| compositor_frame_sink_->DidNotProduceFrame(ack); |
| } |
| |
| } // namespace blink |