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/view_manager/connection_manager.h"
   9 #include "components/view_manager/gles2/gpu_state.h"
  10 #include "components/view_manager/native_viewport/onscreen_context_provider.h"
  11 #include "components/view_manager/public/interfaces/gpu.mojom.h"
  12 #include "components/view_manager/public/interfaces/quads.mojom.h"
  13 #include "components/view_manager/public/interfaces/surfaces.mojom.h"
  14 #include "components/view_manager/server_view.h"
  15 #include "components/view_manager/view_coordinate_conversions.h"
  16 #include "mojo/application/public/cpp/application_connection.h"
  17 #include "mojo/application/public/cpp/application_impl.h"
  18 #include "mojo/converters/geometry/geometry_type_converters.h"
  19 #include "mojo/converters/surfaces/surfaces_type_converters.h"
  20 #include "mojo/converters/surfaces/surfaces_utils.h"
  21 #include "mojo/converters/transform/transform_type_converters.h"
  22
  23 using mojo::Rect;
  24 using mojo::Size;
  25
  26 namespace view_manager {
  27 namespace {
  28
  29 void DrawViewTree(mojo::Pass* pass,
  30                   const ServerView* view,
  31                   const gfx::Vector2d& parent_to_root_origin_offset,
  32                   float opacity) {
  33   if (!view->visible())
  34     return;
  35
  36   const gfx::Rect absolute_bounds =
  37       view->bounds() + parent_to_root_origin_offset;
  38   std::vector<const ServerView*> children(view->GetChildren());
  39   const float combined_opacity = opacity * view->opacity();
  40   for (std::vector<const ServerView*>::reverse_iterator it = children.rbegin();
  41        it != children.rend();
  42        ++it) {
  43     DrawViewTree(pass, *it, absolute_bounds.OffsetFromOrigin(),
  44                  combined_opacity);
  45   }
  46
  47   cc::SurfaceId node_id = view->surface_id();
  48
  49   auto surface_quad_state = mojo::SurfaceQuadState::New();
  50   surface_quad_state->surface = mojo::SurfaceId::From(node_id);
  51
  52   gfx::Transform node_transform;
  53   node_transform.Translate(absolute_bounds.x(), absolute_bounds.y());
  54
  55   const gfx::Rect bounds_at_origin(view->bounds().size());
  56   auto surface_quad = mojo::Quad::New();
  57   surface_quad->material = mojo::Material::MATERIAL_SURFACE_CONTENT;
  58   surface_quad->rect = Rect::From(bounds_at_origin);
  59   surface_quad->opaque_rect = Rect::From(bounds_at_origin);
  60   surface_quad->visible_rect = Rect::From(bounds_at_origin);
  61   surface_quad->needs_blending = true;
  62   surface_quad->shared_quad_state_index =
  63       base::saturated_cast<int32_t>(pass->shared_quad_states.size());
  64   surface_quad->surface_quad_state = surface_quad_state.Pass();
  65
  66   auto sqs = mojo::CreateDefaultSQS(view->bounds().size());
  67   sqs->blend_mode = mojo::SK_XFERMODE_kSrcOver_Mode;
  68   sqs->opacity = combined_opacity;
  69   sqs->content_to_target_transform = mojo::Transform::From(node_transform);
  70
  71   pass->quads.push_back(surface_quad.Pass());
  72   pass->shared_quad_states.push_back(sqs.Pass());
  73 }
  74
  75 }  // namespace
  76
  77 DefaultDisplayManager::DefaultDisplayManager(
  78     bool is_headless,
  79     mojo::ApplicationImpl* app_impl,
  80     const scoped_refptr<gles2::GpuState>& gpu_state,
  81     const mojo::Callback<void()>& platform_viewport_closed_callback)
  82     : is_headless_(is_headless),
  83       app_impl_(app_impl),
  84       gpu_state_(gpu_state),
  85       connection_manager_(nullptr),
  86       event_dispatcher_(nullptr),
  87       draw_timer_(false, false),
  88       frame_pending_(false),
  89       context_provider_(
  90           new native_viewport::OnscreenContextProvider(gpu_state)),
  91       platform_viewport_closed_callback_(platform_viewport_closed_callback),
  92       weak_factory_(this) {
  93   metrics_.size_in_pixels = mojo::Size::New();
  94   metrics_.size_in_pixels->width = 800;
  95   metrics_.size_in_pixels->height = 600;
  96 }
  97
  98 void DefaultDisplayManager::Init(
  99     ConnectionManager* connection_manager,
 100     EventDispatcher* event_dispatcher) {
 101   connection_manager_ = connection_manager;
 102   event_dispatcher_ = event_dispatcher;
 103
 104   platform_viewport_ =
 105       native_viewport::PlatformViewport::Create(this, is_headless_).Pass();
 106   platform_viewport_->Init(gfx::Rect(metrics_.size_in_pixels.To<gfx::Size>()));
 107   platform_viewport_->Show();
 108
 109   mojo::ContextProviderPtr context_provider;
 110   context_provider_->Bind(GetProxy(&context_provider).Pass());
 111   mojo::DisplayFactoryPtr display_factory;
 112   mojo::URLRequestPtr request(mojo::URLRequest::New());
 113   request->url = mojo::String::From("mojo:surfaces_service");
 114   app_impl_->ConnectToService(request.Pass(), &display_factory);
 115   display_factory->Create(context_provider.Pass(),
 116                           nullptr,  // returner - we never submit resources.
 117                           GetProxy(&display_));
 118 }
 119
 120 DefaultDisplayManager::~DefaultDisplayManager() {
 121   // Destroy before |platform_viewport_| because this will destroy
 122   // CommandBufferDriver objects that contain child windows. Otherwise if this
 123   // class destroys its window first, X errors will occur.
 124   context_provider_.reset();
 125
 126   // Destroy the NativeViewport early on as it may call us back during
 127   // destruction and we want to be in a known state.
 128   platform_viewport_.reset();
 129 }
 130
 131 void DefaultDisplayManager::SchedulePaint(const ServerView* view,
 132                                           const gfx::Rect& bounds) {
 133   DCHECK(view);
 134   if (!view->IsDrawn())
 135     return;
 136   const gfx::Rect root_relative_rect =
 137       ConvertRectBetweenViews(view, connection_manager_->root(), bounds);
 138   if (root_relative_rect.IsEmpty())
 139     return;
 140   dirty_rect_.Union(root_relative_rect);
 141   WantToDraw();
 142 }
 143
 144 void DefaultDisplayManager::SetViewportSize(const gfx::Size& size) {
 145   platform_viewport_->SetBounds(gfx::Rect(size));
 146 }
 147
 148 const mojo::ViewportMetrics& DefaultDisplayManager::GetViewportMetrics() {
 149   return metrics_;
 150 }
 151
 152 void DefaultDisplayManager::Draw() {
 153   gfx::Rect rect(metrics_.size_in_pixels.To<gfx::Size>());
 154   auto pass = mojo::CreateDefaultPass(1, rect);
 155   pass->damage_rect = Rect::From(dirty_rect_);
 156
 157   DrawViewTree(pass.get(), connection_manager_->root(), gfx::Vector2d(), 1.0f);
 158
 159   auto frame = mojo::Frame::New();
 160   frame->passes.push_back(pass.Pass());
 161   frame->resources.resize(0u);
 162   frame_pending_ = true;
 163   display_->SubmitFrame(
 164       frame.Pass(),
 165       base::Bind(&DefaultDisplayManager::DidDraw, base::Unretained(this)));
 166   dirty_rect_ = gfx::Rect();
 167 }
 168
 169 void DefaultDisplayManager::DidDraw() {
 170   frame_pending_ = false;
 171   if (!dirty_rect_.IsEmpty())
 172     WantToDraw();
 173 }
 174
 175 void DefaultDisplayManager::WantToDraw() {
 176   if (draw_timer_.IsRunning() || frame_pending_)
 177     return;
 178
 179   draw_timer_.Start(
 180       FROM_HERE, base::TimeDelta(),
 181       base::Bind(&DefaultDisplayManager::Draw, base::Unretained(this)));
 182 }
 183
 184 void DefaultDisplayManager::OnAcceleratedWidgetAvailable(
 185     gfx::AcceleratedWidget widget,
 186     float device_pixel_ratio) {
 187   context_provider_->SetAcceleratedWidget(widget);
 188 }
 189
 190 void DefaultDisplayManager::OnAcceleratedWidgetDestroyed() {
 191   context_provider_->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
 192 }
 193
 194 void DefaultDisplayManager::OnEvent(mojo::EventPtr event) {
 195   event_dispatcher_->OnEvent(event.Pass());
 196 }
 197
 198 void DefaultDisplayManager::OnMetricsChanged(const gfx::Size& size,
 199                                              float device_scale_factor) {
 200   if ((metrics_.size_in_pixels.To<gfx::Size>() == size) &&
 201       (metrics_.device_pixel_ratio == device_scale_factor)) {
 202     return;
 203   }
 204
 205   mojo::ViewportMetrics metrics;
 206   metrics.size_in_pixels = mojo::Size::From(size);
 207   metrics.device_pixel_ratio = device_scale_factor;
 208
 209   connection_manager_->root()->SetBounds(gfx::Rect(size));
 210   connection_manager_->ProcessViewportMetricsChanged(metrics_, metrics);
 211
 212   metrics_.size_in_pixels = metrics.size_in_pixels.Clone();
 213   metrics_.device_pixel_ratio = metrics.device_pixel_ratio;
 214 }
 215
 216 void DefaultDisplayManager::OnDestroyed() {
 217   if (!platform_viewport_closed_callback_.is_null())
 218     platform_viewport_closed_callback_.Run();
 219 }
 220
 221 }  // namespace view_manager