content: Move Surfaces related code out of RWHVA.

content/browser/renderer_host/delegated_frame_host_android.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/delegated_frame_host_android.h"
+
+#include "base/logging.h"
+#include "cc/layers/solid_color_layer.h"
+#include "cc/layers/surface_layer.h"
+#include "cc/output/compositor_frame.h"
+#include "cc/surfaces/surface.h"
+#include "cc/surfaces/surface_id.h"
+#include "cc/surfaces/surface_id_allocator.h"
+#include "cc/surfaces/surface_manager.h"
+#include "content/browser/renderer_host/compositor_impl_android.h"
+
+namespace content {
+
+namespace {
+
+void SatisfyCallback(cc::SurfaceManager* manager,
+                     const cc::SurfaceSequence& sequence) {
+  std::vector<uint32_t> sequences;
+  sequences.push_back(sequence.sequence);
+  manager->DidSatisfySequences(sequence.client_id, &sequences);
+}
+
+void RequireCallback(cc::SurfaceManager* manager,
+                     const cc::SurfaceId& id,
+                     const cc::SurfaceSequence& sequence) {
+  cc::Surface* surface = manager->GetSurfaceForId(id);
+  if (!surface) {
+    LOG(ERROR) << "Attempting to require callback on nonexistent surface";
+    return;
+  }
+  surface->AddDestructionDependency(sequence);
+}
+
+}  // namespace
+
+DelegatedFrameHostAndroid::DelegatedFrameHostAndroid(
+    ui::ViewAndroid* view,
+    SkColor background_color,
+    ReturnResourcesCallback return_resources_callback)
+    : view_(view),
+      return_resources_callback_(return_resources_callback),
+      background_layer_(cc::SolidColorLayer::Create()) {
+  DCHECK(view_);
+  DCHECK(!return_resources_callback_.is_null());
+
+  // TODO(khushalsagar): These CompositorImpl dependencies should move to ui?
+  surface_manager_ = CompositorImpl::GetSurfaceManager();

[Khushal, 2016/07/27 21:58:38]

Was talking to David about this. Should we move these CompositorImpl
dependencies to WindowAndroidCompositor in this patch so
DelegatedFrameHostAndroid doesn't depend on content? The aim is to finally move
this class out so it can be shared with blimp anyway.

+  surface_id_allocator_.reset(
+      new cc::SurfaceIdAllocator(CompositorImpl::AllocateSurfaceClientId()));
+  surface_manager_->RegisterSurfaceClientId(surface_id_allocator_->client_id());
+
+  background_layer_->SetIsDrawable(true);
+  background_layer_->SetBackgroundColor(background_color);
+  view_->GetLayer()->AddChild(background_layer_);
+}
+
+DelegatedFrameHostAndroid::~DelegatedFrameHostAndroid() {
+  DestroyDelegatedContent();
+  surface_factory_.reset();
+  surface_manager_->InvalidateSurfaceClientId(
+      surface_id_allocator_->client_id());
+}
+
+void DelegatedFrameHostAndroid::SubmitCompositorFrame(
+    cc::CompositorFrame frame,
+    cc::SurfaceFactory::DrawCallback draw_callback) {
+  if (!surface_factory_) {
+    surface_factory_ =
+        base::WrapUnique(new cc::SurfaceFactory(surface_manager_, this));
+  }
+
+  cc::RenderPass* root_pass =
+      frame.delegated_frame_data->render_pass_list.back().get();
+  gfx::Size texture_size_in_layer = root_pass->output_rect.size();
+
+  if (surface_id_.is_null() || texture_size_in_layer != current_surface_size_ ||
+      location_bar_content_translation_ !=
+          frame.metadata.location_bar_content_translation ||
+      current_viewport_selection_ != frame.metadata.selection) {
+    DestroyDelegatedContent();
+    DCHECK(!content_layer_);
+
+    surface_id_ = surface_id_allocator_->GenerateId();
+    surface_factory_->Create(surface_id_);
+
+    current_surface_size_ = texture_size_in_layer;
+    location_bar_content_translation_ =
+        frame.metadata.location_bar_content_translation;
+    current_viewport_selection_ = frame.metadata.selection;
+    UpdateContentLayer(std::move(CreateSurfaceLayer()));
+  }
+
+  surface_factory_->SubmitCompositorFrame(surface_id_, std::move(frame),
+                                          draw_callback);
+}
+
+uint32_t DelegatedFrameHostAndroid::GetSurfaceClientId() const {
+  return surface_id_allocator_->client_id();
+}
+
+void DelegatedFrameHostAndroid::DestroyDelegatedContent() {
+  if (surface_id_.is_null())
+    return;
+
+  DCHECK(surface_factory_.get());
+  DCHECK(content_layer_);
+
+  UpdateContentLayer(nullptr);
+  surface_factory_->Destroy(surface_id_);
+  surface_id_ = cc::SurfaceId();
+}
+
+void DelegatedFrameHostAndroid::OutputSurfaceChanged() {
+  DestroyDelegatedContent();
+  surface_factory_.reset();
+}
+
+void DelegatedFrameHostAndroid::UpdateBackgroundColor(SkColor color) {
+  background_layer_->SetBackgroundColor(color);
+}
+
+void DelegatedFrameHostAndroid::UpdateSize(
+    const gfx::Size& desired_content_size) {
+  // TODO(khushalsagar): The gutter logic for when the desired content size
+  // doesn't match the size of the renderer frame should go here.
+  background_layer_->SetBounds(desired_content_size);
+}
+
+cc::Layer* DelegatedFrameHostAndroid::GetContentLayer() const {
+  return content_layer_.get();
+}
+
+void DelegatedFrameHostAndroid::ReturnResources(
+    const cc::ReturnedResourceArray& resources) {
+  return_resources_callback_.Run(resources);
+}
+
+void DelegatedFrameHostAndroid::SetBeginFrameSource(
+    cc::BeginFrameSource* begin_frame_source) {
+  // TODO(tansell): Hook this up.
+}
+
+scoped_refptr<cc::SurfaceLayer>
+DelegatedFrameHostAndroid::CreateSurfaceLayer() {
+  DCHECK(!surface_id_.is_null());
+
+  // manager must outlive compositors using it.
+  scoped_refptr<cc::SurfaceLayer> surface_layer = cc::SurfaceLayer::Create(
+      base::Bind(&SatisfyCallback, base::Unretained(surface_manager_)),
+      base::Bind(&RequireCallback, base::Unretained(surface_manager_)));
+  surface_layer->SetSurfaceId(surface_id_, 1.f, current_surface_size_);
+  surface_layer->SetBounds(current_surface_size_);
+  surface_layer->SetIsDrawable(true);
+  surface_layer->SetContentsOpaque(true);
+
+  return surface_layer;
+}
+
+void DelegatedFrameHostAndroid::UpdateContentLayer(
+    scoped_refptr<cc::Layer> content_layer) {
+  view_->GetLayer()->RemoveAllChildren();
+  content_layer_ = std::move(content_layer);
+
+  if (content_layer_) {
+    view_->GetLayer()->AddChild(content_layer_);
+  } else {
+    view_->GetLayer()->AddChild(background_layer_);
+  }
+}
+
+}  // namespace content