mandoline/ui/aura/surface_binding.cc

   1 // Copyright 2015 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 "mandoline/ui/aura/surface_binding.h"
   6
   7 #include <map>
   8
   9 #include "base/bind.h"
  10 #include "base/lazy_instance.h"
  11 #include "base/threading/thread_local.h"
  12 #include "cc/output/compositor_frame.h"
  13 #include "cc/output/output_surface.h"
  14 #include "cc/output/output_surface_client.h"
  15 #include "cc/output/software_output_device.h"
  16 #include "cc/resources/shared_bitmap_manager.h"
  17 #include "components/view_manager/public/cpp/view.h"
  18 #include "components/view_manager/public/cpp/view_manager.h"
  19 #include "components/view_manager/public/interfaces/gpu.mojom.h"
  20 #include "components/view_manager/public/interfaces/surfaces.mojom.h"
  21 #include "mandoline/ui/aura/window_tree_host_mojo.h"
  22 #include "mojo/application/public/cpp/connect.h"
  23 #include "mojo/application/public/interfaces/shell.mojom.h"
  24 #include "mojo/cc/context_provider_mojo.h"
  25 #include "mojo/converters/geometry/geometry_type_converters.h"
  26 #include "mojo/converters/surfaces/surfaces_type_converters.h"
  27
  28 namespace mandoline {
  29 namespace {
  30
  31 // OutputSurface ---------------------------------------------------------------
  32
  33 // OutputSurface implementation for a view. Pushes the surface id to View when
  34 // appropriate.
  35 class OutputSurfaceImpl : public cc::OutputSurface {
  36  public:
  37   OutputSurfaceImpl(mojo::View* view,
  38                     const scoped_refptr<cc::ContextProvider>& context_provider,
  39                     mojo::Surface* surface,
  40                     uint32_t id_namespace,
  41                     uint32_t* next_local_id);
  42   ~OutputSurfaceImpl() override;
  43
  44   // cc::OutputSurface:
  45   void SwapBuffers(cc::CompositorFrame* frame) override;
  46
  47  private:
  48   mojo::View* view_;
  49   mojo::Surface* surface_;
  50   uint32_t id_namespace_;
  51   uint32_t* next_local_id_;  // Owned by PerViewManagerState.
  52   uint32_t local_id_;
  53   gfx::Size surface_size_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(OutputSurfaceImpl);
  56 };
  57
  58 OutputSurfaceImpl::OutputSurfaceImpl(
  59     mojo::View* view,
  60     const scoped_refptr<cc::ContextProvider>& context_provider,
  61     mojo::Surface* surface,
  62     uint32_t id_namespace,
  63     uint32_t* next_local_id)
  64     : cc::OutputSurface(context_provider),
  65       view_(view),
  66       surface_(surface),
  67       id_namespace_(id_namespace),
  68       next_local_id_(next_local_id),
  69       local_id_(0u) {
  70   capabilities_.delegated_rendering = true;
  71   capabilities_.max_frames_pending = 1;
  72 }
  73
  74 OutputSurfaceImpl::~OutputSurfaceImpl() {
  75 }
  76
  77 void OutputSurfaceImpl::SwapBuffers(cc::CompositorFrame* frame) {
  78   gfx::Size frame_size =
  79       frame->delegated_frame_data->render_pass_list.back()->output_rect.size();
  80   if (frame_size != surface_size_) {
  81     if (local_id_ != 0u)
  82       surface_->DestroySurface(local_id_);
  83     local_id_ = (*next_local_id_)++;
  84     surface_->CreateSurface(local_id_);
  85     auto qualified_id = mojo::SurfaceId::New();
  86     qualified_id->local = local_id_;
  87     qualified_id->id_namespace = id_namespace_;
  88     view_->SetSurfaceId(qualified_id.Pass());
  89     surface_size_ = frame_size;
  90   }
  91
  92   surface_->SubmitFrame(local_id_, mojo::Frame::From(*frame), mojo::Closure());
  93
  94   client_->DidSwapBuffers();
  95   client_->DidSwapBuffersComplete();
  96 }
  97
  98 }  // namespace
  99
 100 // PerViewManagerState ---------------------------------------------------------
 101
 102 // State needed per ViewManager. Provides the real implementation of
 103 // CreateOutputSurface. SurfaceBinding obtains a pointer to the
 104 // PerViewManagerState appropriate for the ViewManager. PerViewManagerState is
 105 // stored in a thread local map. When no more refereces to a PerViewManagerState
 106 // remain the PerViewManagerState is deleted and the underlying map cleaned up.
 107 class SurfaceBinding::PerViewManagerState
 108     : public base::RefCounted<PerViewManagerState>,
 109       public mojo::ResourceReturner {
 110  public:
 111   static PerViewManagerState* Get(mojo::Shell* shell,
 112                                   mojo::ViewManager* view_manager);
 113
 114   scoped_ptr<cc::OutputSurface> CreateOutputSurface(mojo::View* view);
 115
 116  private:
 117   typedef std::map<mojo::ViewManager*,
 118                    PerViewManagerState*> ViewManagerToStateMap;
 119
 120   friend class base::RefCounted<PerViewManagerState>;
 121
 122   PerViewManagerState(mojo::Shell* shell, mojo::ViewManager* view_manager);
 123   ~PerViewManagerState() override;
 124
 125   void Init();
 126
 127   // mojo::ResourceReturner:
 128   void ReturnResources(
 129       mojo::Array<mojo::ReturnedResourcePtr> resources) override;
 130
 131   void SetIdNamespace(uint32_t id_namespace);
 132
 133   static base::LazyInstance<
 134       base::ThreadLocalPointer<ViewManagerToStateMap>>::Leaky view_states;
 135
 136   mojo::Shell* shell_;
 137   mojo::ViewManager* view_manager_;
 138
 139   // Set of state needed to create an OutputSurface.
 140   mojo::GpuPtr gpu_;
 141   mojo::SurfacePtr surface_;
 142   mojo::Binding<mojo::ResourceReturner> returner_binding_;
 143   uint32_t id_namespace_;
 144   uint32_t next_local_id_;
 145
 146   DISALLOW_COPY_AND_ASSIGN(PerViewManagerState);
 147 };
 148
 149 // static
 150 base::LazyInstance<base::ThreadLocalPointer<
 151     SurfaceBinding::PerViewManagerState::ViewManagerToStateMap>>::Leaky
 152     SurfaceBinding::PerViewManagerState::view_states;
 153
 154 // static
 155 SurfaceBinding::PerViewManagerState* SurfaceBinding::PerViewManagerState::Get(
 156     mojo::Shell* shell,
 157     mojo::ViewManager* view_manager) {
 158   ViewManagerToStateMap* view_map = view_states.Pointer()->Get();
 159   if (!view_map) {
 160     view_map = new ViewManagerToStateMap;
 161     view_states.Pointer()->Set(view_map);
 162   }
 163   if (!(*view_map)[view_manager]) {
 164     (*view_map)[view_manager] = new PerViewManagerState(shell, view_manager);
 165     (*view_map)[view_manager]->Init();
 166   }
 167   return (*view_map)[view_manager];
 168 }
 169
 170 scoped_ptr<cc::OutputSurface>
 171 SurfaceBinding::PerViewManagerState::CreateOutputSurface(mojo::View* view) {
 172   // TODO(sky): figure out lifetime here. Do I need to worry about the return
 173   // value outliving this?
 174   mojo::CommandBufferPtr cb;
 175   gpu_->CreateOffscreenGLES2Context(GetProxy(&cb));
 176   scoped_refptr<cc::ContextProvider> context_provider(
 177       new mojo::ContextProviderMojo(cb.PassInterface().PassHandle()));
 178   return make_scoped_ptr(new OutputSurfaceImpl(
 179       view, context_provider, surface_.get(), id_namespace_, &next_local_id_));
 180 }
 181
 182 SurfaceBinding::PerViewManagerState::PerViewManagerState(
 183     mojo::Shell* shell,
 184     mojo::ViewManager* view_manager)
 185     : shell_(shell),
 186       view_manager_(view_manager),
 187       returner_binding_(this),
 188       id_namespace_(0u),
 189       next_local_id_(0u) {
 190 }
 191
 192 SurfaceBinding::PerViewManagerState::~PerViewManagerState() {
 193   ViewManagerToStateMap* view_map = view_states.Pointer()->Get();
 194   DCHECK(view_map);
 195   DCHECK_EQ(this, (*view_map)[view_manager_]);
 196   view_map->erase(view_manager_);
 197   if (view_map->empty()) {
 198     delete view_map;
 199     view_states.Pointer()->Set(nullptr);
 200   }
 201 }
 202
 203 void SurfaceBinding::PerViewManagerState::Init() {
 204   DCHECK(!surface_.get());
 205
 206   mojo::ServiceProviderPtr surfaces_service_provider;
 207   mojo::URLRequestPtr request(mojo::URLRequest::New());
 208   request->url = mojo::String::From("mojo:surfaces_service");
 209   shell_->ConnectToApplication(request.Pass(),
 210                                GetProxy(&surfaces_service_provider),
 211                                nullptr);
 212   ConnectToService(surfaces_service_provider.get(), &surface_);
 213   surface_->GetIdNamespace(
 214       base::Bind(&SurfaceBinding::PerViewManagerState::SetIdNamespace,
 215                  base::Unretained(this)));
 216   // Block until we receive our id namespace.
 217   surface_.WaitForIncomingResponse();
 218   DCHECK_NE(0u, id_namespace_);
 219
 220   mojo::ResourceReturnerPtr returner_ptr;
 221   returner_binding_.Bind(GetProxy(&returner_ptr));
 222   surface_->SetResourceReturner(returner_ptr.Pass());
 223
 224   mojo::ServiceProviderPtr gpu_service_provider;
 225   // TODO(jamesr): Should be mojo:gpu_service
 226   mojo::URLRequestPtr request2(mojo::URLRequest::New());
 227   request2->url = mojo::String::From("mojo:view_manager");
 228   shell_->ConnectToApplication(request2.Pass(),
 229                                GetProxy(&gpu_service_provider),
 230                                nullptr);
 231   ConnectToService(gpu_service_provider.get(), &gpu_);
 232 }
 233
 234 void SurfaceBinding::PerViewManagerState::SetIdNamespace(
 235     uint32_t id_namespace) {
 236   id_namespace_ = id_namespace;
 237 }
 238
 239 void SurfaceBinding::PerViewManagerState::ReturnResources(
 240     mojo::Array<mojo::ReturnedResourcePtr> resources) {
 241 }
 242
 243 // SurfaceBinding --------------------------------------------------------------
 244
 245 SurfaceBinding::SurfaceBinding(mojo::Shell* shell, mojo::View* view)
 246     : view_(view),
 247       state_(PerViewManagerState::Get(shell, view->view_manager())) {
 248 }
 249
 250 SurfaceBinding::~SurfaceBinding() {
 251 }
 252
 253 scoped_ptr<cc::OutputSurface> SurfaceBinding::CreateOutputSurface() {
 254   return state_->CreateOutputSurface(view_);
 255 }
 256
 257 }  // namespace mandoline