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mojo/services/view_manager/display_manager.cc

+// Copyright 2014 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 "mojo/services/view_manager/display_manager.h"
+
+#include "base/numerics/safe_conversions.h"
+#include "mojo/converters/geometry/geometry_type_converters.h"
+#include "mojo/converters/surfaces/surfaces_type_converters.h"
+#include "mojo/converters/transform/transform_type_converters.h"
+#include "mojo/public/cpp/application/application_connection.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/services/view_manager/connection_manager.h"
+#include "mojo/services/view_manager/server_view.h"
+#include "mojo/services/view_manager/view_coordinate_conversions.h"
+#include "third_party/mojo_services/src/gpu/public/interfaces/gpu.mojom.h"
+#include "third_party/mojo_services/src/surfaces/public/cpp/surfaces_utils.h"
+#include "third_party/mojo_services/src/surfaces/public/interfaces/quads.mojom.h"
+#include "third_party/mojo_services/src/surfaces/public/interfaces/surfaces.mojom.h"
+
+using mojo::Rect;
+using mojo::Size;
+
+namespace view_manager {
+namespace {
+
+void DrawViewTree(mojo::Pass* pass,
+                  const ServerView* view,
+                  const gfx::Vector2d& parent_to_root_origin_offset,
+                  float opacity) {
+  if (!view->visible())
+    return;
+
+  const gfx::Rect absolute_bounds =
+      view->bounds() + parent_to_root_origin_offset;
+  std::vector<const ServerView*> children(view->GetChildren());
+  const float combined_opacity = opacity * view->opacity();
+  for (std::vector<const ServerView*>::reverse_iterator it = children.rbegin();
+       it != children.rend();
+       ++it) {
+    DrawViewTree(pass, *it, absolute_bounds.OffsetFromOrigin(),
+                 combined_opacity);
+  }
+
+  cc::SurfaceId node_id = view->surface_id();
+
+  auto surface_quad_state = mojo::SurfaceQuadState::New();
+  surface_quad_state->surface = mojo::SurfaceId::From(node_id);
+
+  gfx::Transform node_transform;
+  node_transform.Translate(absolute_bounds.x(), absolute_bounds.y());
+
+  const gfx::Rect bounds_at_origin(view->bounds().size());
+  auto surface_quad = mojo::Quad::New();
+  surface_quad->material = mojo::Material::MATERIAL_SURFACE_CONTENT;
+  surface_quad->rect = Rect::From(bounds_at_origin);
+  surface_quad->opaque_rect = Rect::From(bounds_at_origin);
+  surface_quad->visible_rect = Rect::From(bounds_at_origin);
+  surface_quad->needs_blending = true;
+  surface_quad->shared_quad_state_index =
+      base::saturated_cast<int32_t>(pass->shared_quad_states.size());
+  surface_quad->surface_quad_state = surface_quad_state.Pass();
+
+  auto sqs = CreateDefaultSQS(*Size::From(view->bounds().size()));
+  sqs->blend_mode = mojo::SK_XFERMODE_kSrcOver_Mode;
+  sqs->opacity = combined_opacity;
+  sqs->content_to_target_transform = mojo::Transform::From(node_transform);
+
+  pass->quads.push_back(surface_quad.Pass());
+  pass->shared_quad_states.push_back(sqs.Pass());
+}
+
+}  // namespace
+
+DefaultDisplayManager::DefaultDisplayManager(
+    mojo::ApplicationImpl* app_impl,
+    mojo::ApplicationConnection* app_connection,
+    const mojo::Callback<void()>& native_viewport_closed_callback)
+    : app_impl_(app_impl),
+      app_connection_(app_connection),
+      connection_manager_(nullptr),
+      draw_timer_(false, false),
+      frame_pending_(false),
+      native_viewport_closed_callback_(native_viewport_closed_callback),
+      weak_factory_(this) {
+  metrics_.size = mojo::Size::New();
+  metrics_.size->width = 800;
+  metrics_.size->height = 600;
+}
+
+void DefaultDisplayManager::Init(ConnectionManager* connection_manager) {
+  connection_manager_ = connection_manager;
+  app_impl_->ConnectToService("mojo:native_viewport_service",
+                              &native_viewport_);
+  native_viewport_.set_error_handler(this);
+  native_viewport_->Create(metrics_.size->Clone(),
+                           base::Bind(&DefaultDisplayManager::OnMetricsChanged,
+                                      weak_factory_.GetWeakPtr()));
+  native_viewport_->Show();
+
+  mojo::ContextProviderPtr context_provider;
+  native_viewport_->GetContextProvider(GetProxy(&context_provider));
+  mojo::DisplayFactoryPtr display_factory;
+  app_impl_->ConnectToService("mojo:surfaces_service", &display_factory);
+  display_factory->Create(context_provider.Pass(),
+                          nullptr,  // returner - we never submit resources.
+                          GetProxy(&display_));
+
+  mojo::NativeViewportEventDispatcherPtr event_dispatcher;
+  app_connection_->ConnectToService(&event_dispatcher);
+  native_viewport_->SetEventDispatcher(event_dispatcher.Pass());
+}
+
+DefaultDisplayManager::~DefaultDisplayManager() {
+}
+
+void DefaultDisplayManager::SchedulePaint(const ServerView* view,
+                                          const gfx::Rect& bounds) {
+  if (!view->IsDrawn(connection_manager_->root()))
+    return;
+  const gfx::Rect root_relative_rect =
+      ConvertRectBetweenViews(view, connection_manager_->root(), bounds);
+  if (root_relative_rect.IsEmpty())
+    return;
+  dirty_rect_.Union(root_relative_rect);
+  WantToDraw();
+}
+
+void DefaultDisplayManager::SetViewportSize(const gfx::Size& size) {
+  native_viewport_->SetSize(Size::From(size));
+}
+
+const mojo::ViewportMetrics& DefaultDisplayManager::GetViewportMetrics() {
+  return metrics_;
+}
+
+void DefaultDisplayManager::Draw() {
+  Rect rect;
+  rect.width = metrics_.size->width;
+  rect.height = metrics_.size->height;
+  auto pass = CreateDefaultPass(1, rect);
+  pass->damage_rect = Rect::From(dirty_rect_);
+
+  DrawViewTree(pass.get(), connection_manager_->root(), gfx::Vector2d(), 1.0f);
+
+  auto frame = mojo::Frame::New();
+  frame->passes.push_back(pass.Pass());
+  frame->resources.resize(0u);
+  frame_pending_ = true;
+  display_->SubmitFrame(
+      frame.Pass(),
+      base::Bind(&DefaultDisplayManager::DidDraw, base::Unretained(this)));
+  dirty_rect_ = gfx::Rect();
+}
+
+void DefaultDisplayManager::DidDraw() {
+  frame_pending_ = false;
+  if (!dirty_rect_.IsEmpty())
+    WantToDraw();
+}
+
+void DefaultDisplayManager::WantToDraw() {
+  if (draw_timer_.IsRunning() || frame_pending_)
+    return;
+
+  draw_timer_.Start(
+      FROM_HERE, base::TimeDelta(),
+      base::Bind(&DefaultDisplayManager::Draw, base::Unretained(this)));
+}
+
+void DefaultDisplayManager::OnMetricsChanged(mojo::ViewportMetricsPtr metrics) {
+  metrics_.size = metrics->size.Clone();
+  metrics_.device_pixel_ratio = metrics->device_pixel_ratio;
+  gfx::Rect bounds(metrics_.size.To<gfx::Size>());
+  connection_manager_->root()->SetBounds(bounds);
+  connection_manager_->ProcessViewportMetricsChanged(metrics_, *metrics);
+  native_viewport_->RequestMetrics(base::Bind(
+      &DefaultDisplayManager::OnMetricsChanged, weak_factory_.GetWeakPtr()));
+}
+
+void DefaultDisplayManager::OnConnectionError() {
+  // This is called when the native_viewport is torn down before
+  // ~DefaultDisplayManager may be called.
+  native_viewport_closed_callback_.Run();
+}
+
+}  // namespace view_manager