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/display_manager_factory.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->quad_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 // static
  78 DisplayManagerFactory* DisplayManager::factory_ = nullptr;
  79
  80 // static
  81 DisplayManager* DisplayManager::Create(
  82     bool is_headless,
  83     mojo::ApplicationImpl* app_impl,
  84     const scoped_refptr<gles2::GpuState>& gpu_state) {
  85   if (factory_)
  86     return factory_->CreateDisplayManager(is_headless, app_impl, gpu_state);
  87   return new DefaultDisplayManager(is_headless, app_impl, gpu_state);
  88 }
  89
  90 DefaultDisplayManager::DefaultDisplayManager(
  91     bool is_headless,
  92     mojo::ApplicationImpl* app_impl,
  93     const scoped_refptr<gles2::GpuState>& gpu_state)
  94     : is_headless_(is_headless),
  95       app_impl_(app_impl),
  96       gpu_state_(gpu_state),
  97       delegate_(nullptr),
  98       draw_timer_(false, false),
  99       frame_pending_(false),
 100       context_provider_(
 101           new native_viewport::OnscreenContextProvider(gpu_state)),
 102       weak_factory_(this) {
 103   metrics_.size_in_pixels = mojo::Size::New();
 104   metrics_.size_in_pixels->width = 800;
 105   metrics_.size_in_pixels->height = 600;
 106 }
 107
 108 void DefaultDisplayManager::Init(DisplayManagerDelegate* delegate) {
 109   delegate_ = delegate;
 110
 111   platform_viewport_ =
 112       native_viewport::PlatformViewport::Create(this, is_headless_).Pass();
 113   platform_viewport_->Init(gfx::Rect(metrics_.size_in_pixels.To<gfx::Size>()));
 114   platform_viewport_->Show();
 115
 116   mojo::ContextProviderPtr context_provider;
 117   context_provider_->Bind(GetProxy(&context_provider).Pass());
 118   mojo::DisplayFactoryPtr display_factory;
 119   mojo::URLRequestPtr request(mojo::URLRequest::New());
 120   request->url = mojo::String::From("mojo:surfaces_service");
 121   app_impl_->ConnectToService(request.Pass(), &display_factory);
 122   display_factory->Create(context_provider.Pass(),
 123                           nullptr,  // returner - we never submit resources.
 124                           GetProxy(&display_));
 125 }
 126
 127 DefaultDisplayManager::~DefaultDisplayManager() {
 128   // Destroy before |platform_viewport_| because this will destroy
 129   // CommandBufferDriver objects that contain child windows. Otherwise if this
 130   // class destroys its window first, X errors will occur.
 131   context_provider_.reset();
 132
 133   // Destroy the NativeViewport early on as it may call us back during
 134   // destruction and we want to be in a known state.
 135   platform_viewport_.reset();
 136 }
 137
 138 void DefaultDisplayManager::SchedulePaint(const ServerView* view,
 139                                           const gfx::Rect& bounds) {
 140   DCHECK(view);
 141   if (!view->IsDrawn())
 142     return;
 143   const gfx::Rect root_relative_rect =
 144       ConvertRectBetweenViews(view, delegate_->GetRootView(), bounds);
 145   if (root_relative_rect.IsEmpty())
 146     return;
 147   dirty_rect_.Union(root_relative_rect);
 148   WantToDraw();
 149 }
 150
 151 void DefaultDisplayManager::SetViewportSize(const gfx::Size& size) {
 152   platform_viewport_->SetBounds(gfx::Rect(size));
 153 }
 154
 155 const mojo::ViewportMetrics& DefaultDisplayManager::GetViewportMetrics() {
 156   return metrics_;
 157 }
 158
 159 void DefaultDisplayManager::Draw() {
 160   gfx::Rect rect(metrics_.size_in_pixels.To<gfx::Size>());
 161   auto pass = mojo::CreateDefaultPass(1, rect);
 162   pass->damage_rect = Rect::From(dirty_rect_);
 163
 164   DrawViewTree(pass.get(), delegate_->GetRootView(), gfx::Vector2d(), 1.0f);
 165
 166   auto frame = mojo::Frame::New();
 167   frame->passes.push_back(pass.Pass());
 168   frame->resources.resize(0u);
 169   frame_pending_ = true;
 170   display_->SubmitFrame(
 171       frame.Pass(),
 172       base::Bind(&DefaultDisplayManager::DidDraw, base::Unretained(this)));
 173   dirty_rect_ = gfx::Rect();
 174 }
 175
 176 void DefaultDisplayManager::DidDraw() {
 177   frame_pending_ = false;
 178   if (!dirty_rect_.IsEmpty())
 179     WantToDraw();
 180 }
 181
 182 void DefaultDisplayManager::WantToDraw() {
 183   if (draw_timer_.IsRunning() || frame_pending_)
 184     return;
 185
 186   draw_timer_.Start(
 187       FROM_HERE, base::TimeDelta(),
 188       base::Bind(&DefaultDisplayManager::Draw, base::Unretained(this)));
 189 }
 190
 191 void DefaultDisplayManager::OnAcceleratedWidgetAvailable(
 192     gfx::AcceleratedWidget widget,
 193     float device_pixel_ratio) {
 194   context_provider_->SetAcceleratedWidget(widget);
 195   OnMetricsChanged(metrics_.size_in_pixels.To<gfx::Size>(), device_pixel_ratio);
 196 }
 197
 198 void DefaultDisplayManager::OnAcceleratedWidgetDestroyed() {
 199   context_provider_->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
 200 }
 201
 202 void DefaultDisplayManager::OnEvent(mojo::EventPtr event) {
 203   delegate_->OnEvent(event.Pass());
 204 }
 205
 206 void DefaultDisplayManager::OnMetricsChanged(const gfx::Size& size,
 207                                              float device_scale_factor) {
 208   if ((metrics_.size_in_pixels.To<gfx::Size>() == size) &&
 209       (metrics_.device_pixel_ratio == device_scale_factor)) {
 210     return;
 211   }
 212
 213   mojo::ViewportMetrics metrics;
 214   metrics.size_in_pixels = mojo::Size::From(size);
 215   metrics.device_pixel_ratio = device_scale_factor;
 216
 217   delegate_->GetRootView()->SetBounds(gfx::Rect(size));
 218   delegate_->OnViewportMetricsChanged(metrics_, metrics);
 219
 220   metrics_.size_in_pixels = metrics.size_in_pixels.Clone();
 221   metrics_.device_pixel_ratio = metrics.device_pixel_ratio;
 222 }
 223
 224 void DefaultDisplayManager::OnDestroyed() {
 225   delegate_->OnDisplayClosed();
 226 }
 227
 228 }  // namespace view_manager