components/view_manager/display_manager.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/view_manager/display_manager.h"
   6
   7 #include "base/numerics/safe_conversions.h"
   8 #include "components/gpu/public/interfaces/gpu.mojom.h"
   9 #include "components/surfaces/public/interfaces/quads.mojom.h"
  10 #include "components/surfaces/public/interfaces/surfaces.mojom.h"
  11 #include "components/view_manager/connection_manager.h"
  12 #include "components/view_manager/server_view.h"
  13 #include "components/view_manager/view_coordinate_conversions.h"
  14 #include "mojo/converters/geometry/geometry_type_converters.h"
  15 #include "mojo/converters/surfaces/surfaces_type_converters.h"
  16 #include "mojo/converters/surfaces/surfaces_utils.h"
  17 #include "mojo/converters/transform/transform_type_converters.h"
  18 #include "third_party/mojo/src/mojo/public/cpp/application/application_connection.h"
  19 #include "third_party/mojo/src/mojo/public/cpp/application/application_impl.h"
  20
  21 using mojo::Rect;
  22 using mojo::Size;
  23
  24 namespace view_manager {
  25 namespace {
  26
  27 void DrawViewTree(mojo::Pass* pass,
  28                   const ServerView* view,
  29                   const gfx::Vector2d& parent_to_root_origin_offset,
  30                   float opacity) {
  31   if (!view->visible())
  32     return;
  33
  34   const gfx::Rect absolute_bounds =
  35       view->bounds() + parent_to_root_origin_offset;
  36   std::vector<const ServerView*> children(view->GetChildren());
  37   const float combined_opacity = opacity * view->opacity();
  38   for (std::vector<const ServerView*>::reverse_iterator it = children.rbegin();
  39        it != children.rend();
  40        ++it) {
  41     DrawViewTree(pass, *it, absolute_bounds.OffsetFromOrigin(),
  42                  combined_opacity);
  43   }
  44
  45   cc::SurfaceId node_id = view->surface_id();
  46
  47   auto surface_quad_state = mojo::SurfaceQuadState::New();
  48   surface_quad_state->surface = mojo::SurfaceId::From(node_id);
  49
  50   gfx::Transform node_transform;
  51   node_transform.Translate(absolute_bounds.x(), absolute_bounds.y());
  52
  53   const gfx::Rect bounds_at_origin(view->bounds().size());
  54   auto surface_quad = mojo::Quad::New();
  55   surface_quad->material = mojo::Material::MATERIAL_SURFACE_CONTENT;
  56   surface_quad->rect = Rect::From(bounds_at_origin);
  57   surface_quad->opaque_rect = Rect::From(bounds_at_origin);
  58   surface_quad->visible_rect = Rect::From(bounds_at_origin);
  59   surface_quad->needs_blending = true;
  60   surface_quad->shared_quad_state_index =
  61       base::saturated_cast<int32_t>(pass->shared_quad_states.size());
  62   surface_quad->surface_quad_state = surface_quad_state.Pass();
  63
  64   auto sqs = mojo::CreateDefaultSQS(view->bounds().size());
  65   sqs->blend_mode = mojo::SK_XFERMODE_kSrcOver_Mode;
  66   sqs->opacity = combined_opacity;
  67   sqs->content_to_target_transform = mojo::Transform::From(node_transform);
  68
  69   pass->quads.push_back(surface_quad.Pass());
  70   pass->shared_quad_states.push_back(sqs.Pass());
  71 }
  72
  73 }  // namespace
  74
  75 DefaultDisplayManager::DefaultDisplayManager(
  76     mojo::ApplicationImpl* app_impl,
  77     const mojo::Callback<void()>& native_viewport_closed_callback)
  78     : app_impl_(app_impl),
  79       connection_manager_(nullptr),
  80       draw_timer_(false, false),
  81       frame_pending_(false),
  82       native_viewport_closed_callback_(native_viewport_closed_callback),
  83       weak_factory_(this) {
  84   metrics_.size = mojo::Size::New();
  85   metrics_.size->width = 800;
  86   metrics_.size->height = 600;
  87 }
  88
  89 void DefaultDisplayManager::Init(
  90     ConnectionManager* connection_manager,
  91     mojo::NativeViewportEventDispatcherPtr event_dispatcher) {
  92   connection_manager_ = connection_manager;
  93   app_impl_->ConnectToService("mojo:native_viewport_service",
  94                               &native_viewport_);
  95   native_viewport_.set_error_handler(this);
  96   native_viewport_->Create(metrics_.size->Clone(),
  97                            base::Bind(&DefaultDisplayManager::OnMetricsChanged,
  98                                       weak_factory_.GetWeakPtr()));
  99   native_viewport_->Show();
 100
 101   mojo::ContextProviderPtr context_provider;
 102   native_viewport_->GetContextProvider(GetProxy(&context_provider));
 103   mojo::DisplayFactoryPtr display_factory;
 104   app_impl_->ConnectToService("mojo:surfaces_service", &display_factory);
 105   display_factory->Create(context_provider.Pass(),
 106                           nullptr,  // returner - we never submit resources.
 107                           GetProxy(&display_));
 108
 109   native_viewport_->SetEventDispatcher(event_dispatcher.Pass());
 110 }
 111
 112 DefaultDisplayManager::~DefaultDisplayManager() {
 113 }
 114
 115 void DefaultDisplayManager::SchedulePaint(const ServerView* view,
 116                                           const gfx::Rect& bounds) {
 117   if (!view->IsDrawn(connection_manager_->root()))
 118     return;
 119   const gfx::Rect root_relative_rect =
 120       ConvertRectBetweenViews(view, connection_manager_->root(), bounds);
 121   if (root_relative_rect.IsEmpty())
 122     return;
 123   dirty_rect_.Union(root_relative_rect);
 124   WantToDraw();
 125 }
 126
 127 void DefaultDisplayManager::SetViewportSize(const gfx::Size& size) {
 128   native_viewport_->SetSize(Size::From(size));
 129 }
 130
 131 const mojo::ViewportMetrics& DefaultDisplayManager::GetViewportMetrics() {
 132   return metrics_;
 133 }
 134
 135 void DefaultDisplayManager::Draw() {
 136   gfx::Rect rect(metrics_.size->width, metrics_.size->height);
 137   auto pass = mojo::CreateDefaultPass(1, rect);
 138   pass->damage_rect = Rect::From(dirty_rect_);
 139
 140   DrawViewTree(pass.get(), connection_manager_->root(), gfx::Vector2d(), 1.0f);
 141
 142   auto frame = mojo::Frame::New();
 143   frame->passes.push_back(pass.Pass());
 144   frame->resources.resize(0u);
 145   frame_pending_ = true;
 146   display_->SubmitFrame(
 147       frame.Pass(),
 148       base::Bind(&DefaultDisplayManager::DidDraw, base::Unretained(this)));
 149   dirty_rect_ = gfx::Rect();
 150 }
 151
 152 void DefaultDisplayManager::DidDraw() {
 153   frame_pending_ = false;
 154   if (!dirty_rect_.IsEmpty())
 155     WantToDraw();
 156 }
 157
 158 void DefaultDisplayManager::WantToDraw() {
 159   if (draw_timer_.IsRunning() || frame_pending_)
 160     return;
 161
 162   draw_timer_.Start(
 163       FROM_HERE, base::TimeDelta(),
 164       base::Bind(&DefaultDisplayManager::Draw, base::Unretained(this)));
 165 }
 166
 167 void DefaultDisplayManager::OnMetricsChanged(mojo::ViewportMetricsPtr metrics) {
 168   metrics_.size = metrics->size.Clone();
 169   metrics_.device_pixel_ratio = metrics->device_pixel_ratio;
 170   gfx::Rect bounds(metrics_.size.To<gfx::Size>());
 171   connection_manager_->root()->SetBounds(bounds);
 172   connection_manager_->ProcessViewportMetricsChanged(metrics_, *metrics);
 173   native_viewport_->RequestMetrics(base::Bind(
 174       &DefaultDisplayManager::OnMetricsChanged, weak_factory_.GetWeakPtr()));
 175 }
 176
 177 void DefaultDisplayManager::OnConnectionError() {
 178   // This is called when the native_viewport is torn down before
 179   // ~DefaultDisplayManager may be called.
 180   native_viewport_closed_callback_.Run();
 181 }
 182
 183 }  // namespace view_manager