blimp: Move BlimpCompositor to use delegated rendering.

blimp/client/core/compositor/delegated_output_surface.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 "blimp/client/core/compositor/delegated_output_surface.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/memory/ptr_util.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_checker.h"
+#include "cc/output/compositor_frame.h"
+
+namespace blimp {
+namespace client {
+
+DelegatedOutputSurface::DelegatedOutputSurface(
+    scoped_refptr<cc::ContextProvider> compositor_context_provider,
+    scoped_refptr<cc::ContextProvider> worker_context_provider,
+    scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
+    base::WeakPtr<BlimpOutputSurfaceClient> client)
+    : cc::OutputSurface(std::move(compositor_context_provider),
+                        std::move(worker_context_provider),
+                        nullptr),
+      main_task_runner_(std::move(main_task_runner)),
+      client_(client),
+      bound_to_client_(false),
+      weak_factory_(this) {
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
+  capabilities_.delegated_rendering = true;
+}
+
+DelegatedOutputSurface::~DelegatedOutputSurface() = default;
+
+void DelegatedOutputSurface::ReclaimCompositorResources(
+    const cc::ReturnedResourceArray& resources) {
+  DCHECK(client_thread_checker_.CalledOnValidThread());
+  cc::OutputSurface::ReclaimResources(resources);
+}
+
+uint32_t DelegatedOutputSurface::GetFramebufferCopyTextureFormat() {
+  NOTREACHED() << "Should not be called on delegated output surface";
+  return 0;
+}
+
+bool DelegatedOutputSurface::BindToClient(cc::OutputSurfaceClient* client) {
+  bool success = cc::OutputSurface::BindToClient(client);
+  if (success) {
+    main_task_runner_->PostTask(
+        FROM_HERE, base::Bind(&BlimpOutputSurfaceClient::BindToOutputSurface,
+                              client_, weak_factory_.GetWeakPtr()));
+  }
+  return success;
+}
+
+void DelegatedOutputSurface::SwapBuffers(cc::CompositorFrame frame) {
+  DCHECK(client_thread_checker_.CalledOnValidThread());
+
+  main_task_runner_->PostTask(
+      FROM_HERE, base::Bind(&BlimpOutputSurfaceClient::SwapCompositorFrame,
+                            client_, base::Passed(&frame)));
+  cc::OutputSurface::PostSwapBuffersComplete();
+}
+
+void DelegatedOutputSurface::DetachFromClient() {
+  cc::OutputSurface::DetachFromClient();
+
+  if (bound_to_client_ == true) {
+    bound_to_client_ = false;
+    main_task_runner_->PostTask(
+        FROM_HERE,
+        base::Bind(&BlimpOutputSurfaceClient::UnbindOutputSurface, client_));
+  }
+
+  weak_factory_.InvalidateWeakPtrs();
+}
+
+}  // namespace client
+}  // namespace blimp