content/browser/renderer_host/offscreen_canvas_compositor_frame_sink.cc

// Copyright 2016 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 "content/browser/renderer_host/offscreen_canvas_compositor_frame_sink.h"

#include "cc/surfaces/surface.h"
#include "cc/surfaces/surface_manager.h"
#include "content/browser/compositor/surface_utils.h"
#include "mojo/public/cpp/bindings/strong_binding.h"

namespace content {

OffscreenCanvasCompositorFrameSink::OffscreenCanvasCompositorFrameSink(
    const cc::SurfaceId& surface_id,
    cc::mojom::MojoCompositorFrameSinkClientPtr client)
    : surface_id_(surface_id), client_(std::move(client)) {}

OffscreenCanvasCompositorFrameSink::~OffscreenCanvasCompositorFrameSink() {
  if (surface_factory_) {
    cc::SurfaceManager* manager = GetSurfaceManager();
    if (!manager) {
      // Inform SurfaceFactory that SurfaceManager's no longer alive to
      // avoid its destruction error.
      surface_factory_->DidDestroySurfaceManager();
    } else {
      manager->InvalidateSurfaceClientId(surface_id_.client_id());
    }
    surface_factory_->Destroy(surface_id_);
  }
}

// static
void OffscreenCanvasCompositorFrameSink::Create(
    const cc::SurfaceId& surface_id,
    cc::mojom::MojoCompositorFrameSinkClientPtr client,
    cc::mojom::MojoCompositorFrameSinkRequest request) {
  mojo::MakeStrongBinding(base::MakeUnique<OffscreenCanvasCompositorFrameSink>(
                              surface_id, std::move(client)),
                          std::move(request));
}

void OffscreenCanvasCompositorFrameSink::SubmitCompositorFrame(
    cc::CompositorFrame frame,
    const SubmitCompositorFrameCallback& callback) {
  if (!surface_factory_) {
    cc::SurfaceManager* manager = GetSurfaceManager();
    surface_factory_ = base::MakeUnique<cc::SurfaceFactory>(manager, this);
    surface_factory_->Create(surface_id_);

    manager->RegisterSurfaceClientId(surface_id_.client_id());
  }
  surface_factory_->SubmitCompositorFrame(surface_id_, std::move(frame),
                                          callback);
}

void OffscreenCanvasCompositorFrameSink::SetNeedsBeginFrame(
    bool needs_begin_frame) {
  NOTIMPLEMENTED();
}

void OffscreenCanvasCompositorFrameSink::ReturnResources(
    const cc::ReturnedResourceArray& resources) {
  client_->ReturnResources(resources);
}

void OffscreenCanvasCompositorFrameSink::WillDrawSurface(
    const cc::SurfaceId& id,
    const gfx::Rect& damage_rect) {}

void OffscreenCanvasCompositorFrameSink::SetBeginFrameSource(
    cc::BeginFrameSource* begin_frame_source) {}

}  // namespace content