content: Move Surfaces related code out of RWHVA.

ui/android/delegated_frame_host_android.cc

Index: ui/android/delegated_frame_host_android.cc
diff --git a/ui/android/delegated_frame_host_android.cc b/ui/android/delegated_frame_host_android.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6e786dc9adb2d85cff2a0f62c5c29714d9189906
--- /dev/null
+++ b/ui/android/delegated_frame_host_android.cc
@@ -0,0 +1,245 @@
+// 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 "ui/android/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/output/copy_output_result.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 "ui/android/context_provider_factory.h"
+#include "ui/android/view_android.h"
+#include "ui/android/window_android_compositor.h"
+#include "ui/gfx/android/device_display_info.h"
+#include "ui/gfx/geometry/dip_util.h"
+
+namespace ui {
+
+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);
+}
+
+scoped_refptr<cc::SurfaceLayer> CreateSurfaceLayer(
+    cc::SurfaceManager* surface_manager,
+    cc::SurfaceId surface_id,
+    const gfx::Size surface_size) {
+  // manager must outlive compositors using it.
+  scoped_refptr<cc::SurfaceLayer> layer = cc::SurfaceLayer::Create(
+      base::Bind(&SatisfyCallback, base::Unretained(surface_manager)),
+      base::Bind(&RequireCallback, base::Unretained(surface_manager)));
+  layer->SetSurfaceId(surface_id, 1.f, surface_size);
+  layer->SetBounds(surface_size);
+  layer->SetIsDrawable(true);
+  layer->SetContentsOpaque(true);
+
+  return layer;
+}
+
+void CopyOutputRequestCallback(
+    scoped_refptr<cc::Layer> readback_layer,
+    cc::CopyOutputRequest::CopyOutputRequestCallback result_callback,
+    std::unique_ptr<cc::CopyOutputResult> copy_output_result) {
+  readback_layer->RemoveFromParent();
+  result_callback.Run(std::move(copy_output_result));
+}
+
+}  // 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());
+
+  surface_manager_ =
+      ui::ContextProviderFactory::GetInstance()->GetSurfaceManager();
+  surface_id_allocator_.reset(new cc::SurfaceIdAllocator(
+      ui::ContextProviderFactory::GetInstance()->AllocateSurfaceClientId()));
+  surface_manager_->RegisterSurfaceClientId(surface_id_allocator_->client_id());
+
+  background_layer_->SetBackgroundColor(background_color);
+  view_->GetLayer()->AddChild(background_layer_);
+  UpdateBackgroundLayer();
+}
+
+DelegatedFrameHostAndroid::~DelegatedFrameHostAndroid() {
+  DestroyDelegatedContent();
+  surface_factory_.reset();
+  surface_manager_->InvalidateSurfaceClientId(
+      surface_id_allocator_->client_id());
+  background_layer_->RemoveFromParent();
+}
+
+DelegatedFrameHostAndroid::FrameData::FrameData() = default;
+
+DelegatedFrameHostAndroid::FrameData::~FrameData() = default;
+
+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 surface_size = root_pass->output_rect.size();
+
+  if (!current_frame_ || surface_size != current_frame_->surface_size ||
+      current_frame_->location_bar_content_translation !=
+          frame.metadata.location_bar_content_translation ||
+      current_frame_->viewport_selection != frame.metadata.selection) {
+    DestroyDelegatedContent();
+    DCHECK(!content_layer_);
+    DCHECK(!current_frame_);
+
+    current_frame_ = base::MakeUnique<FrameData>();
+    current_frame_->surface_id = surface_id_allocator_->GenerateId();
+    surface_factory_->Create(current_frame_->surface_id);
+
+    current_frame_->surface_size = surface_size;
+    current_frame_->location_bar_content_translation =
+        frame.metadata.location_bar_content_translation;
+    current_frame_->viewport_selection = frame.metadata.selection;
+    content_layer_ =
+        CreateSurfaceLayer(surface_manager_, current_frame_->surface_id,
+                           current_frame_->surface_size);
+    view_->GetLayer()->AddChild(content_layer_);
+    UpdateBackgroundLayer();
+  }
+
+  surface_factory_->SubmitCompositorFrame(current_frame_->surface_id,
+                                          std::move(frame), draw_callback);
+}
+
+uint32_t DelegatedFrameHostAndroid::GetSurfaceClientId() const {
+  return surface_id_allocator_->client_id();
+}
+
+void DelegatedFrameHostAndroid::RequestCopyOfSurface(
+    WindowAndroidCompositor* compositor,
+    const gfx::Rect& src_subrect_in_pixel,
+    cc::CopyOutputRequest::CopyOutputRequestCallback result_callback) {
+  DCHECK(current_frame_);
+  DCHECK(!result_callback.is_null());
+
+  scoped_refptr<cc::Layer> readback_layer =
+      CreateSurfaceLayer(surface_manager_, current_frame_->surface_id,
+                         current_frame_->surface_size);
+  readback_layer->SetHideLayerAndSubtree(true);
+  compositor->AttachLayerForReadback(readback_layer);
+  std::unique_ptr<cc::CopyOutputRequest> copy_output_request =
+      cc::CopyOutputRequest::CreateRequest(base::Bind(
+          &CopyOutputRequestCallback, readback_layer, result_callback));
+
+  if (!src_subrect_in_pixel.IsEmpty())
+    copy_output_request->set_area(src_subrect_in_pixel);
+
+  surface_factory_->RequestCopyOfSurface(current_frame_->surface_id,
+                                         std::move(copy_output_request));
+}
+
+void DelegatedFrameHostAndroid::DestroyDelegatedContent() {
+  if (!current_frame_)
+    return;
+
+  DCHECK(surface_factory_.get());
+  DCHECK(content_layer_);
+
+  content_layer_->RemoveFromParent();
+  content_layer_ = nullptr;
+  surface_factory_->Destroy(current_frame_->surface_id);
+  current_frame_.reset();
+
+  UpdateBackgroundLayer();
+}
+
+bool DelegatedFrameHostAndroid::HasDelegatedContent() const {
+  return current_frame_.get() != nullptr;
+}
+
+void DelegatedFrameHostAndroid::OutputSurfaceChanged() {
+  DestroyDelegatedContent();
+  surface_factory_.reset();
+}
+
+void DelegatedFrameHostAndroid::UpdateBackgroundColor(SkColor color) {
+  background_layer_->SetBackgroundColor(color);
+}
+
+void DelegatedFrameHostAndroid::SetContentsOpaque(bool opaque) {
+  if (!content_layer_)
+    return;
+  content_layer_->SetContentsOpaque(opaque);
+}
+
+void DelegatedFrameHostAndroid::UpdateContainerSizeinDIP(
+    const gfx::Size& size_in_dip) {
+  container_size_in_dip_ = size_in_dip;
+  background_layer_->SetBounds(gfx::ConvertSizeToPixel(
+      gfx::DeviceDisplayInfo().GetDIPScale(), container_size_in_dip_));
+  UpdateBackgroundLayer();
+}
+
+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.
+}
+
+void DelegatedFrameHostAndroid::UpdateBackgroundLayer() {
+  // The background layer draws in 2 cases:
+  // 1) When we don't have any content from the renderer.
+  // 2) When the bounds of the content received from the renderer does not match
+  // the desired content bounds.
+  bool background_is_drawable = false;
+
+  if (current_frame_) {
+    float device_scale_factor = gfx::DeviceDisplayInfo().GetDIPScale();
+    gfx::Size content_size_in_dip = gfx::ConvertSizeToDIP(
+        device_scale_factor, current_frame_->surface_size);
+    content_size_in_dip.set_height(
+        content_size_in_dip.height() +
+        current_frame_->location_bar_content_translation.y());
+    background_is_drawable =
+        content_size_in_dip.width() < container_size_in_dip_.width() ||
+        content_size_in_dip.height() < container_size_in_dip_.height();
+  } else {
+    background_is_drawable = true;
+  }
+
+  background_layer_->SetIsDrawable(background_is_drawable);
+}
+
+}  // namespace ui