content/common/gpu/gpu_command_buffer_stub.cc

   1 // Copyright (c) 2012 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 "base/bind.h"
   6 #include "base/bind_helpers.h"
   7 #include "base/command_line.h"
   8 #include "base/debug/trace_event.h"
   9 #include "base/hash.h"
  10 #include "base/memory/shared_memory.h"
  11 #include "base/time/time.h"
  12 #include "build/build_config.h"
  13 #include "content/common/gpu/gpu_channel.h"
  14 #include "content/common/gpu/gpu_channel_manager.h"
  15 #include "content/common/gpu/gpu_command_buffer_stub.h"
  16 #include "content/common/gpu/gpu_memory_manager.h"
  17 #include "content/common/gpu/gpu_memory_tracking.h"
  18 #include "content/common/gpu/gpu_messages.h"
  19 #include "content/common/gpu/gpu_watchdog.h"
  20 #include "content/common/gpu/image_transport_surface.h"
  21 #include "content/common/gpu/media/gl_surface_capturer.h"
  22 #include "content/common/gpu/media/gpu_video_decode_accelerator.h"
  23 #include "content/common/gpu/sync_point_manager.h"
  24 #include "content/public/common/content_client.h"
  25 #include "gpu/command_buffer/common/constants.h"
  26 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
  27 #include "gpu/command_buffer/common/mailbox.h"
  28 #include "gpu/command_buffer/service/gl_context_virtual.h"
  29 #include "gpu/command_buffer/service/gl_state_restorer_impl.h"
  30 #include "gpu/command_buffer/service/logger.h"
  31 #include "gpu/command_buffer/service/memory_tracking.h"
  32 #include "gpu/command_buffer/service/query_manager.h"
  33 #include "ui/gl/gl_bindings.h"
  34 #include "ui/gl/gl_switches.h"
  35
  36 #if defined(OS_WIN)
  37 #include "content/public/common/sandbox_init.h"
  38 #endif
  39
  40 #if defined(OS_ANDROID)
  41 #include "content/common/gpu/stream_texture_manager_android.h"
  42 #endif
  43
  44 namespace content {
  45 namespace {
  46
  47 // The GpuCommandBufferMemoryTracker class provides a bridge between the
  48 // ContextGroup's memory type managers and the GpuMemoryManager class.
  49 class GpuCommandBufferMemoryTracker : public gpu::gles2::MemoryTracker {
  50  public:
  51   explicit GpuCommandBufferMemoryTracker(GpuChannel* channel) :
  52       tracking_group_(channel->gpu_channel_manager()->gpu_memory_manager()->
  53           CreateTrackingGroup(channel->renderer_pid(), this)) {
  54   }
  55
  56   virtual void TrackMemoryAllocatedChange(
  57       size_t old_size,
  58       size_t new_size,
  59       gpu::gles2::MemoryTracker::Pool pool) OVERRIDE {
  60     tracking_group_->TrackMemoryAllocatedChange(
  61         old_size, new_size, pool);
  62   }
  63
  64   virtual bool EnsureGPUMemoryAvailable(size_t size_needed) OVERRIDE {
  65     return tracking_group_->EnsureGPUMemoryAvailable(size_needed);
  66   };
  67
  68  private:
  69   virtual ~GpuCommandBufferMemoryTracker() {
  70   }
  71   scoped_ptr<GpuMemoryTrackingGroup> tracking_group_;
  72
  73   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferMemoryTracker);
  74 };
  75
  76 // FastSetActiveURL will shortcut the expensive call to SetActiveURL when the
  77 // url_hash matches.
  78 void FastSetActiveURL(const GURL& url, size_t url_hash) {
  79   // Leave the previously set URL in the empty case -- empty URLs are given by
  80   // WebKitPlatformSupportImpl::createOffscreenGraphicsContext3D. Hopefully the
  81   // onscreen context URL was set previously and will show up even when a crash
  82   // occurs during offscreen command processing.
  83   if (url.is_empty())
  84     return;
  85   static size_t g_last_url_hash = 0;
  86   if (url_hash != g_last_url_hash) {
  87     g_last_url_hash = url_hash;
  88     GetContentClient()->SetActiveURL(url);
  89   }
  90 }
  91
  92 // The first time polling a fence, delay some extra time to allow other
  93 // stubs to process some work, or else the timing of the fences could
  94 // allow a pattern of alternating fast and slow frames to occur.
  95 const int64 kHandleMoreWorkPeriodMs = 2;
  96 const int64 kHandleMoreWorkPeriodBusyMs = 1;
  97
  98 // Prevents idle work from being starved.
  99 const int64 kMaxTimeSinceIdleMs = 10;
 100
 101 }  // namespace
 102
 103 GpuCommandBufferStub::GpuCommandBufferStub(
 104     GpuChannel* channel,
 105     GpuCommandBufferStub* share_group,
 106     const gfx::GLSurfaceHandle& handle,
 107     gpu::gles2::MailboxManager* mailbox_manager,
 108     gpu::gles2::ImageManager* image_manager,
 109     const gfx::Size& size,
 110     const gpu::gles2::DisallowedFeatures& disallowed_features,
 111     const std::vector<int32>& attribs,
 112     gfx::GpuPreference gpu_preference,
 113     bool use_virtualized_gl_context,
 114     int32 route_id,
 115     int32 surface_id,
 116     GpuWatchdog* watchdog,
 117     bool software,
 118     const GURL& active_url)
 119     : channel_(channel),
 120       handle_(handle),
 121       initial_size_(size),
 122       disallowed_features_(disallowed_features),
 123       requested_attribs_(attribs),
 124       gpu_preference_(gpu_preference),
 125       use_virtualized_gl_context_(use_virtualized_gl_context),
 126       route_id_(route_id),
 127       surface_id_(surface_id),
 128       software_(software),
 129       last_flush_count_(0),
 130       last_memory_allocation_valid_(false),
 131       watchdog_(watchdog),
 132       sync_point_wait_count_(0),
 133       delayed_work_scheduled_(false),
 134       previous_messages_processed_(0),
 135       active_url_(active_url),
 136       total_gpu_memory_(0) {
 137   active_url_hash_ = base::Hash(active_url.possibly_invalid_spec());
 138   FastSetActiveURL(active_url_, active_url_hash_);
 139   if (share_group) {
 140     context_group_ = share_group->context_group_;
 141   } else {
 142     gpu::StreamTextureManager* stream_texture_manager = NULL;
 143 #if defined(OS_ANDROID)
 144     stream_texture_manager = channel_->stream_texture_manager();
 145 #endif
 146     context_group_ = new gpu::gles2::ContextGroup(
 147         mailbox_manager,
 148         image_manager,
 149         new GpuCommandBufferMemoryTracker(channel),
 150         stream_texture_manager,
 151         true);
 152   }
 153
 154   use_virtualized_gl_context_ |=
 155       context_group_->feature_info()->workarounds().use_virtualized_gl_contexts;
 156 }
 157
 158 GpuCommandBufferStub::~GpuCommandBufferStub() {
 159   Destroy();
 160
 161   GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 162   gpu_channel_manager->Send(new GpuHostMsg_DestroyCommandBuffer(surface_id()));
 163 }
 164
 165 GpuMemoryManager* GpuCommandBufferStub::GetMemoryManager() {
 166     return channel()->gpu_channel_manager()->gpu_memory_manager();
 167 }
 168
 169 bool GpuCommandBufferStub::OnMessageReceived(const IPC::Message& message) {
 170   FastSetActiveURL(active_url_, active_url_hash_);
 171
 172   // Ensure the appropriate GL context is current before handling any IPC
 173   // messages directed at the command buffer. This ensures that the message
 174   // handler can assume that the context is current (not necessary for
 175   // Echo, RetireSyncPoint, or WaitSyncPoint).
 176   if (decoder_.get() &&
 177       message.type() != GpuCommandBufferMsg_Echo::ID &&
 178       message.type() != GpuCommandBufferMsg_GetStateFast::ID &&
 179       message.type() != GpuCommandBufferMsg_RetireSyncPoint::ID &&
 180       message.type() != GpuCommandBufferMsg_SetLatencyInfo::ID) {
 181     if (!MakeCurrent())
 182       return false;
 183   }
 184
 185   // Always use IPC_MESSAGE_HANDLER_DELAY_REPLY for synchronous message handlers
 186   // here. This is so the reply can be delayed if the scheduler is unscheduled.
 187   bool handled = true;
 188   IPC_BEGIN_MESSAGE_MAP(GpuCommandBufferStub, message)
 189     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_Initialize,
 190                                     OnInitialize);
 191     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_SetGetBuffer,
 192                                     OnSetGetBuffer);
 193     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_ProduceFrontBuffer,
 194                         OnProduceFrontBuffer);
 195     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_Echo, OnEcho);
 196     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_GetState, OnGetState);
 197     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_GetStateFast,
 198                                     OnGetStateFast);
 199     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_AsyncFlush, OnAsyncFlush);
 200     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SetLatencyInfo, OnSetLatencyInfo);
 201     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_Rescheduled, OnRescheduled);
 202     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_RegisterTransferBuffer,
 203                         OnRegisterTransferBuffer);
 204     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyTransferBuffer,
 205                         OnDestroyTransferBuffer);
 206     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_GetTransferBuffer,
 207                                     OnGetTransferBuffer);
 208     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_CreateVideoDecoder,
 209                                     OnCreateVideoDecoder)
 210     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_CreateSurfaceCapturer,
 211                                     OnCreateSurfaceCapturer)
 212     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SetSurfaceVisible,
 213                         OnSetSurfaceVisible)
 214     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DiscardBackbuffer,
 215                         OnDiscardBackbuffer)
 216     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_EnsureBackbuffer,
 217                         OnEnsureBackbuffer)
 218     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_RetireSyncPoint,
 219                         OnRetireSyncPoint)
 220     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SignalSyncPoint,
 221                         OnSignalSyncPoint)
 222     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SignalQuery,
 223                         OnSignalQuery)
 224     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SendClientManagedMemoryStats,
 225                         OnReceivedClientManagedMemoryStats)
 226     IPC_MESSAGE_HANDLER(
 227         GpuCommandBufferMsg_SetClientHasMemoryAllocationChangedCallback,
 228         OnSetClientHasMemoryAllocationChangedCallback)
 229     IPC_MESSAGE_UNHANDLED(handled = false)
 230   IPC_END_MESSAGE_MAP()
 231
 232   // Ensure that any delayed work that was created will be handled.
 233   ScheduleDelayedWork(kHandleMoreWorkPeriodMs);
 234
 235   DCHECK(handled);
 236   return handled;
 237 }
 238
 239 bool GpuCommandBufferStub::Send(IPC::Message* message) {
 240   return channel_->Send(message);
 241 }
 242
 243 bool GpuCommandBufferStub::IsScheduled() {
 244   return (!scheduler_.get() || scheduler_->IsScheduled());
 245 }
 246
 247 bool GpuCommandBufferStub::HasMoreWork() {
 248   return scheduler_.get() && scheduler_->HasMoreWork();
 249 }
 250
 251 void GpuCommandBufferStub::PollWork() {
 252   TRACE_EVENT0("gpu", "GpuCommandBufferStub::PollWork");
 253   delayed_work_scheduled_ = false;
 254   FastSetActiveURL(active_url_, active_url_hash_);
 255   if (decoder_.get() && !MakeCurrent())
 256     return;
 257
 258   if (scheduler_) {
 259     bool fences_complete = scheduler_->PollUnscheduleFences();
 260     // Perform idle work if all fences are complete.
 261     if (fences_complete) {
 262       uint64 current_messages_processed =
 263           channel()->gpu_channel_manager()->MessagesProcessed();
 264       // We're idle when no messages were processed or scheduled.
 265       bool is_idle =
 266           (previous_messages_processed_ == current_messages_processed) &&
 267           !channel()->gpu_channel_manager()->HandleMessagesScheduled();
 268       if (!is_idle && !last_idle_time_.is_null()) {
 269         base::TimeDelta time_since_idle = base::TimeTicks::Now() -
 270             last_idle_time_;
 271         base::TimeDelta max_time_since_idle =
 272             base::TimeDelta::FromMilliseconds(kMaxTimeSinceIdleMs);
 273
 274         // Force idle when it's been too long since last time we were idle.
 275         if (time_since_idle > max_time_since_idle)
 276           is_idle = true;
 277       }
 278
 279       if (is_idle) {
 280         last_idle_time_ = base::TimeTicks::Now();
 281         scheduler_->PerformIdleWork();
 282       }
 283     }
 284   }
 285   ScheduleDelayedWork(kHandleMoreWorkPeriodBusyMs);
 286 }
 287
 288 bool GpuCommandBufferStub::HasUnprocessedCommands() {
 289   if (command_buffer_) {
 290     gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 291     return state.put_offset != state.get_offset &&
 292         !gpu::error::IsError(state.error);
 293   }
 294   return false;
 295 }
 296
 297 void GpuCommandBufferStub::ScheduleDelayedWork(int64 delay) {
 298   if (!HasMoreWork()) {
 299     last_idle_time_ = base::TimeTicks();
 300     return;
 301   }
 302
 303   if (delayed_work_scheduled_)
 304     return;
 305   delayed_work_scheduled_ = true;
 306
 307   // Idle when no messages are processed between now and when
 308   // PollWork is called.
 309   previous_messages_processed_ =
 310       channel()->gpu_channel_manager()->MessagesProcessed();
 311   if (last_idle_time_.is_null())
 312     last_idle_time_ = base::TimeTicks::Now();
 313
 314   // IsScheduled() returns true after passing all unschedule fences
 315   // and this is when we can start performing idle work. Idle work
 316   // is done synchronously so we can set delay to 0 and instead poll
 317   // for more work at the rate idle work is performed. This also ensures
 318   // that idle work is done as efficiently as possible without any
 319   // unnecessary delays.
 320   if (scheduler_.get() &&
 321       scheduler_->IsScheduled() &&
 322       scheduler_->HasMoreIdleWork()) {
 323     delay = 0;
 324   }
 325
 326   base::MessageLoop::current()->PostDelayedTask(
 327       FROM_HERE,
 328       base::Bind(&GpuCommandBufferStub::PollWork, AsWeakPtr()),
 329       base::TimeDelta::FromMilliseconds(delay));
 330 }
 331
 332 void GpuCommandBufferStub::OnEcho(const IPC::Message& message) {
 333   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnEcho");
 334   Send(new IPC::Message(message));
 335 }
 336
 337 bool GpuCommandBufferStub::MakeCurrent() {
 338   if (decoder_->MakeCurrent())
 339     return true;
 340   DLOG(ERROR) << "Context lost because MakeCurrent failed.";
 341   command_buffer_->SetContextLostReason(decoder_->GetContextLostReason());
 342   command_buffer_->SetParseError(gpu::error::kLostContext);
 343   CheckContextLost();
 344   return false;
 345 }
 346
 347 void GpuCommandBufferStub::Destroy() {
 348   if (handle_.is_null() && !active_url_.is_empty()) {
 349     GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 350     gpu_channel_manager->Send(new GpuHostMsg_DidDestroyOffscreenContext(
 351         active_url_));
 352   }
 353
 354   memory_manager_client_state_.reset();
 355
 356   while (!sync_points_.empty())
 357     OnRetireSyncPoint(sync_points_.front());
 358
 359   if (decoder_)
 360     decoder_->set_engine(NULL);
 361
 362   // The scheduler has raw references to the decoder and the command buffer so
 363   // destroy it before those.
 364   scheduler_.reset();
 365
 366   bool have_context = false;
 367   if (decoder_ && command_buffer_ &&
 368       command_buffer_->GetState().error != gpu::error::kLostContext)
 369     have_context = decoder_->MakeCurrent();
 370   FOR_EACH_OBSERVER(DestructionObserver,
 371                     destruction_observers_,
 372                     OnWillDestroyStub());
 373
 374   if (decoder_) {
 375     decoder_->Destroy(have_context);
 376     decoder_.reset();
 377   }
 378
 379   command_buffer_.reset();
 380
 381   // Remove this after crbug.com/248395 is sorted out.
 382   surface_ = NULL;
 383 }
 384
 385 void GpuCommandBufferStub::OnInitializeFailed(IPC::Message* reply_message) {
 386   Destroy();
 387   GpuCommandBufferMsg_Initialize::WriteReplyParams(reply_message, false);
 388   Send(reply_message);
 389 }
 390
 391 void GpuCommandBufferStub::OnInitialize(
 392     base::SharedMemoryHandle shared_state_handle,
 393     IPC::Message* reply_message) {
 394   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnInitialize");
 395   DCHECK(!command_buffer_.get());
 396
 397   scoped_ptr<base::SharedMemory> shared_state_shm(
 398       new base::SharedMemory(shared_state_handle, false));
 399
 400   command_buffer_.reset(new gpu::CommandBufferService(
 401       context_group_->transfer_buffer_manager()));
 402
 403   if (!command_buffer_->Initialize()) {
 404     DLOG(ERROR) << "CommandBufferService failed to initialize.\n";
 405     OnInitializeFailed(reply_message);
 406     return;
 407   }
 408
 409   decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group_.get()));
 410
 411   scheduler_.reset(new gpu::GpuScheduler(command_buffer_.get(),
 412                                          decoder_.get(),
 413                                          decoder_.get()));
 414   if (preemption_flag_.get())
 415     scheduler_->SetPreemptByFlag(preemption_flag_);
 416
 417   decoder_->set_engine(scheduler_.get());
 418
 419   if (!handle_.is_null()) {
 420 #if defined(OS_MACOSX) || defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
 421     if (software_) {
 422       DLOG(ERROR) << "No software support.\n";
 423       OnInitializeFailed(reply_message);
 424       return;
 425     }
 426 #endif
 427
 428     surface_ = ImageTransportSurface::CreateSurface(
 429         channel_->gpu_channel_manager(),
 430         this,
 431         handle_);
 432   } else {
 433     GpuChannelManager* manager = channel_->gpu_channel_manager();
 434     surface_ = manager->GetDefaultOffscreenSurface();
 435   }
 436
 437   if (!surface_.get()) {
 438     DLOG(ERROR) << "Failed to create surface.\n";
 439     OnInitializeFailed(reply_message);
 440     return;
 441   }
 442
 443   scoped_refptr<gfx::GLContext> context;
 444   if (use_virtualized_gl_context_ && channel_->share_group()) {
 445     context = channel_->share_group()->GetSharedContext();
 446     if (!context.get()) {
 447       context = gfx::GLContext::CreateGLContext(
 448           channel_->share_group(),
 449           channel_->gpu_channel_manager()->GetDefaultOffscreenSurface(),
 450           gpu_preference_);
 451       channel_->share_group()->SetSharedContext(context.get());
 452     }
 453     // This should be a non-virtual GL context.
 454     DCHECK(context->GetHandle());
 455     context = new gpu::GLContextVirtual(
 456         channel_->share_group(), context.get(), decoder_->AsWeakPtr());
 457     if (!context->Initialize(surface_.get(), gpu_preference_)) {
 458       // TODO(sievers): The real context created above for the default
 459       // offscreen surface might not be compatible with this surface.
 460       // Need to adjust at least GLX to be able to create the initial context
 461       // with a config that is compatible with onscreen and offscreen surfaces.
 462       context = NULL;
 463
 464       DLOG(ERROR) << "Failed to initialize virtual GL context.";
 465       OnInitializeFailed(reply_message);
 466       return;
 467     }
 468   }
 469   if (!context.get()) {
 470     context = gfx::GLContext::CreateGLContext(
 471         channel_->share_group(), surface_.get(), gpu_preference_);
 472   }
 473   if (!context.get()) {
 474     DLOG(ERROR) << "Failed to create context.\n";
 475     OnInitializeFailed(reply_message);
 476     return;
 477   }
 478
 479   if (!context->MakeCurrent(surface_.get())) {
 480     LOG(ERROR) << "Failed to make context current.";
 481     OnInitializeFailed(reply_message);
 482     return;
 483   }
 484
 485   if (!context->GetGLStateRestorer()) {
 486     context->SetGLStateRestorer(
 487         new gpu::GLStateRestorerImpl(decoder_->AsWeakPtr()));
 488   }
 489
 490   if (!context->GetTotalGpuMemory(&total_gpu_memory_))
 491     total_gpu_memory_ = 0;
 492
 493   if (!context_group_->has_program_cache()) {
 494     context_group_->set_program_cache(
 495         channel_->gpu_channel_manager()->program_cache());
 496   }
 497
 498   // Initialize the decoder with either the view or pbuffer GLContext.
 499   if (!decoder_->Initialize(surface_,
 500                             context,
 501                             !surface_id(),
 502                             initial_size_,
 503                             disallowed_features_,
 504                             requested_attribs_)) {
 505     DLOG(ERROR) << "Failed to initialize decoder.";
 506     OnInitializeFailed(reply_message);
 507     return;
 508   }
 509
 510   if (CommandLine::ForCurrentProcess()->HasSwitch(
 511       switches::kEnableGPUServiceLogging)) {
 512     decoder_->set_log_commands(true);
 513   }
 514
 515   decoder_->GetLogger()->SetMsgCallback(
 516       base::Bind(&GpuCommandBufferStub::SendConsoleMessage,
 517                  base::Unretained(this)));
 518   decoder_->SetShaderCacheCallback(
 519       base::Bind(&GpuCommandBufferStub::SendCachedShader,
 520                  base::Unretained(this)));
 521   decoder_->SetWaitSyncPointCallback(
 522       base::Bind(&GpuCommandBufferStub::OnWaitSyncPoint,
 523                  base::Unretained(this)));
 524
 525   command_buffer_->SetPutOffsetChangeCallback(
 526       base::Bind(&GpuCommandBufferStub::PutChanged, base::Unretained(this)));
 527   command_buffer_->SetGetBufferChangeCallback(
 528       base::Bind(&gpu::GpuScheduler::SetGetBuffer,
 529                  base::Unretained(scheduler_.get())));
 530   command_buffer_->SetParseErrorCallback(
 531       base::Bind(&GpuCommandBufferStub::OnParseError, base::Unretained(this)));
 532   scheduler_->SetSchedulingChangedCallback(
 533       base::Bind(&GpuChannel::StubSchedulingChanged,
 534                  base::Unretained(channel_)));
 535
 536   if (watchdog_) {
 537     scheduler_->SetCommandProcessedCallback(
 538         base::Bind(&GpuCommandBufferStub::OnCommandProcessed,
 539                    base::Unretained(this)));
 540   }
 541
 542   if (!command_buffer_->SetSharedStateBuffer(shared_state_shm.Pass())) {
 543     DLOG(ERROR) << "Failed to map shared stae buffer.";
 544     OnInitializeFailed(reply_message);
 545     return;
 546   }
 547
 548   GpuCommandBufferMsg_Initialize::WriteReplyParams(reply_message, true);
 549   Send(reply_message);
 550
 551   if (handle_.is_null() && !active_url_.is_empty()) {
 552     GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 553     gpu_channel_manager->Send(new GpuHostMsg_DidCreateOffscreenContext(
 554         active_url_));
 555   }
 556 }
 557
 558 void GpuCommandBufferStub::OnSetLatencyInfo(
 559     const ui::LatencyInfo& latency_info) {
 560   if (!latency_info_callback_.is_null())
 561     latency_info_callback_.Run(latency_info);
 562 }
 563
 564 void GpuCommandBufferStub::SetLatencyInfoCallback(
 565     const LatencyInfoCallback& callback) {
 566   latency_info_callback_ = callback;
 567 }
 568
 569 void GpuCommandBufferStub::OnSetGetBuffer(int32 shm_id,
 570                                           IPC::Message* reply_message) {
 571   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnSetGetBuffer");
 572   if (command_buffer_)
 573     command_buffer_->SetGetBuffer(shm_id);
 574   Send(reply_message);
 575 }
 576
 577 void GpuCommandBufferStub::OnProduceFrontBuffer(const gpu::Mailbox& mailbox) {
 578   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnProduceFrontBuffer");
 579   if (!decoder_)
 580     LOG(ERROR) << "Can't produce front buffer before initialization.";
 581
 582   if (!decoder_->ProduceFrontBuffer(mailbox))
 583     LOG(ERROR) << "Failed to produce front buffer.";
 584 }
 585
 586 void GpuCommandBufferStub::OnGetState(IPC::Message* reply_message) {
 587   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnGetState");
 588   if (command_buffer_) {
 589     gpu::CommandBuffer::State state = command_buffer_->GetState();
 590     CheckContextLost();
 591     GpuCommandBufferMsg_GetState::WriteReplyParams(reply_message, state);
 592   } else {
 593     DLOG(ERROR) << "no command_buffer.";
 594     reply_message->set_reply_error();
 595   }
 596   Send(reply_message);
 597 }
 598
 599 void GpuCommandBufferStub::OnParseError() {
 600   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnParseError");
 601   DCHECK(command_buffer_.get());
 602   gpu::CommandBuffer::State state = command_buffer_->GetState();
 603   IPC::Message* msg = new GpuCommandBufferMsg_Destroyed(
 604       route_id_, state.context_lost_reason);
 605   msg->set_unblock(true);
 606   Send(msg);
 607
 608   // Tell the browser about this context loss as well, so it can
 609   // determine whether client APIs like WebGL need to be immediately
 610   // blocked from automatically running.
 611   GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 612   gpu_channel_manager->Send(new GpuHostMsg_DidLoseContext(
 613       handle_.is_null(), state.context_lost_reason, active_url_));
 614
 615   CheckContextLost();
 616 }
 617
 618 void GpuCommandBufferStub::OnGetStateFast(IPC::Message* reply_message) {
 619   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnGetStateFast");
 620   DCHECK(command_buffer_.get());
 621   CheckContextLost();
 622   gpu::CommandBuffer::State state = command_buffer_->GetState();
 623   GpuCommandBufferMsg_GetStateFast::WriteReplyParams(reply_message, state);
 624   Send(reply_message);
 625 }
 626
 627 void GpuCommandBufferStub::OnAsyncFlush(int32 put_offset,
 628                                         uint32 flush_count) {
 629   TRACE_EVENT1("gpu", "GpuCommandBufferStub::OnAsyncFlush",
 630                "put_offset", put_offset);
 631   DCHECK(command_buffer_.get());
 632   if (flush_count - last_flush_count_ < 0x8000000U) {
 633     last_flush_count_ = flush_count;
 634     command_buffer_->Flush(put_offset);
 635   } else {
 636     // We received this message out-of-order. This should not happen but is here
 637     // to catch regressions. Ignore the message.
 638     NOTREACHED() << "Received a Flush message out-of-order";
 639   }
 640
 641   ReportState();
 642 }
 643
 644 void GpuCommandBufferStub::OnRescheduled() {
 645   gpu::CommandBuffer::State pre_state = command_buffer_->GetLastState();
 646   command_buffer_->Flush(pre_state.put_offset);
 647   gpu::CommandBuffer::State post_state = command_buffer_->GetLastState();
 648
 649   if (pre_state.get_offset != post_state.get_offset)
 650     ReportState();
 651 }
 652
 653 void GpuCommandBufferStub::OnRegisterTransferBuffer(
 654     int32 id,
 655     base::SharedMemoryHandle transfer_buffer,
 656     uint32 size) {
 657   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnRegisterTransferBuffer");
 658   base::SharedMemory shared_memory(transfer_buffer, false);
 659
 660   if (command_buffer_)
 661     command_buffer_->RegisterTransferBuffer(id, &shared_memory, size);
 662 }
 663
 664 void GpuCommandBufferStub::OnDestroyTransferBuffer(int32 id) {
 665   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyTransferBuffer");
 666
 667   if (command_buffer_)
 668     command_buffer_->DestroyTransferBuffer(id);
 669 }
 670
 671 void GpuCommandBufferStub::OnGetTransferBuffer(
 672     int32 id,
 673     IPC::Message* reply_message) {
 674   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnGetTransferBuffer");
 675   if (command_buffer_) {
 676     base::SharedMemoryHandle transfer_buffer = base::SharedMemoryHandle();
 677     uint32 size = 0;
 678
 679     gpu::Buffer buffer = command_buffer_->GetTransferBuffer(id);
 680     if (buffer.shared_memory) {
 681 #if defined(OS_WIN)
 682       transfer_buffer = NULL;
 683       BrokerDuplicateHandle(buffer.shared_memory->handle(),
 684           channel_->renderer_pid(), &transfer_buffer, FILE_MAP_READ |
 685           FILE_MAP_WRITE, 0);
 686       DCHECK(transfer_buffer != NULL);
 687 #else
 688       buffer.shared_memory->ShareToProcess(channel_->renderer_pid(),
 689                                            &transfer_buffer);
 690 #endif
 691       size = buffer.size;
 692     }
 693
 694     GpuCommandBufferMsg_GetTransferBuffer::WriteReplyParams(reply_message,
 695                                                             transfer_buffer,
 696                                                             size);
 697   } else {
 698     reply_message->set_reply_error();
 699   }
 700   Send(reply_message);
 701 }
 702
 703 void GpuCommandBufferStub::OnCommandProcessed() {
 704   if (watchdog_)
 705     watchdog_->CheckArmed();
 706 }
 707
 708 void GpuCommandBufferStub::ReportState() {
 709   if (!CheckContextLost())
 710     command_buffer_->UpdateState();
 711 }
 712
 713 void GpuCommandBufferStub::PutChanged() {
 714   FastSetActiveURL(active_url_, active_url_hash_);
 715   scheduler_->PutChanged();
 716 }
 717
 718 void GpuCommandBufferStub::OnCreateVideoDecoder(
 719     media::VideoCodecProfile profile,
 720     IPC::Message* reply_message) {
 721   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateVideoDecoder");
 722   int decoder_route_id = channel_->GenerateRouteID();
 723   GpuVideoDecodeAccelerator* decoder = new GpuVideoDecodeAccelerator(
 724       decoder_route_id, this, channel_->io_message_loop());
 725   decoder->Initialize(profile, reply_message);
 726   // decoder is registered as a DestructionObserver of this stub and will
 727   // self-delete during destruction of this stub.
 728 }
 729
 730 void GpuCommandBufferStub::OnCreateSurfaceCapturer(
 731     IPC::Message* reply_message) {
 732   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateSurfaceCapturer");
 733   int capturer_route_id = channel_->GenerateRouteID();
 734   new GLSurfaceCapturer(capturer_route_id, this);
 735   // The capturer is registered as a DestructionObserver of this stub and will
 736   // self-delete during destruction of this stub.
 737   GpuCommandBufferMsg_CreateSurfaceCapturer::WriteReplyParams(
 738       reply_message, capturer_route_id);
 739   Send(reply_message);
 740 }
 741
 742 void GpuCommandBufferStub::OnSetSurfaceVisible(bool visible) {
 743   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnSetSurfaceVisible");
 744   if (memory_manager_client_state_)
 745     memory_manager_client_state_->SetVisible(visible);
 746 }
 747
 748 void GpuCommandBufferStub::OnDiscardBackbuffer() {
 749   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDiscardBackbuffer");
 750   if (!surface_.get())
 751     return;
 752   if (surface_->DeferDraws()) {
 753     DCHECK(!IsScheduled());
 754     channel_->RequeueMessage();
 755   } else {
 756     if (!surface_->SetBackbufferAllocation(false))
 757       channel_->DestroySoon();
 758   }
 759 }
 760
 761 void GpuCommandBufferStub::OnEnsureBackbuffer() {
 762   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnEnsureBackbuffer");
 763   if (!surface_.get())
 764     return;
 765   if (surface_->DeferDraws()) {
 766     DCHECK(!IsScheduled());
 767     channel_->RequeueMessage();
 768   } else {
 769     if (!surface_->SetBackbufferAllocation(true))
 770       channel_->DestroySoon();
 771   }
 772 }
 773
 774 void GpuCommandBufferStub::AddSyncPoint(uint32 sync_point) {
 775   sync_points_.push_back(sync_point);
 776 }
 777
 778 void GpuCommandBufferStub::OnRetireSyncPoint(uint32 sync_point) {
 779   DCHECK(!sync_points_.empty() && sync_points_.front() == sync_point);
 780   sync_points_.pop_front();
 781   GpuChannelManager* manager = channel_->gpu_channel_manager();
 782   manager->sync_point_manager()->RetireSyncPoint(sync_point);
 783 }
 784
 785 bool GpuCommandBufferStub::OnWaitSyncPoint(uint32 sync_point) {
 786   if (sync_point_wait_count_ == 0) {
 787     TRACE_EVENT_ASYNC_BEGIN1("gpu", "WaitSyncPoint", this,
 788                              "GpuCommandBufferStub", this);
 789   }
 790   scheduler_->SetScheduled(false);
 791   ++sync_point_wait_count_;
 792   GpuChannelManager* manager = channel_->gpu_channel_manager();
 793   manager->sync_point_manager()->AddSyncPointCallback(
 794       sync_point,
 795       base::Bind(&GpuCommandBufferStub::OnSyncPointRetired,
 796                  this->AsWeakPtr()));
 797   return scheduler_->IsScheduled();
 798 }
 799
 800 void GpuCommandBufferStub::OnSyncPointRetired() {
 801   --sync_point_wait_count_;
 802   if (sync_point_wait_count_ == 0) {
 803     TRACE_EVENT_ASYNC_END1("gpu", "WaitSyncPoint", this,
 804                            "GpuCommandBufferStub", this);
 805   }
 806   scheduler_->SetScheduled(true);
 807 }
 808
 809 void GpuCommandBufferStub::OnSignalSyncPoint(uint32 sync_point, uint32 id) {
 810   GpuChannelManager* manager = channel_->gpu_channel_manager();
 811   manager->sync_point_manager()->AddSyncPointCallback(
 812       sync_point,
 813       base::Bind(&GpuCommandBufferStub::OnSignalSyncPointAck,
 814                  this->AsWeakPtr(),
 815                  id));
 816 }
 817
 818 void GpuCommandBufferStub::OnSignalSyncPointAck(uint32 id) {
 819   Send(new GpuCommandBufferMsg_SignalSyncPointAck(route_id_, id));
 820 }
 821
 822 void GpuCommandBufferStub::OnSignalQuery(uint32 query_id, uint32 id) {
 823   if (decoder_) {
 824     gpu::gles2::QueryManager* query_manager = decoder_->GetQueryManager();
 825     if (query_manager) {
 826       gpu::gles2::QueryManager::Query* query =
 827           query_manager->GetQuery(query_id);
 828       if (query) {
 829         query->AddCallback(
 830           base::Bind(&GpuCommandBufferStub::OnSignalSyncPointAck,
 831                      this->AsWeakPtr(),
 832                      id));
 833         return;
 834       }
 835     }
 836   }
 837   // Something went wrong, run callback immediately.
 838   OnSignalSyncPointAck(id);
 839 }
 840
 841
 842 void GpuCommandBufferStub::OnReceivedClientManagedMemoryStats(
 843     const GpuManagedMemoryStats& stats) {
 844   TRACE_EVENT0(
 845       "gpu",
 846       "GpuCommandBufferStub::OnReceivedClientManagedMemoryStats");
 847   if (memory_manager_client_state_)
 848     memory_manager_client_state_->SetManagedMemoryStats(stats);
 849 }
 850
 851 void GpuCommandBufferStub::OnSetClientHasMemoryAllocationChangedCallback(
 852     bool has_callback) {
 853   TRACE_EVENT0(
 854       "gpu",
 855       "GpuCommandBufferStub::OnSetClientHasMemoryAllocationChangedCallback");
 856   if (has_callback) {
 857     if (!memory_manager_client_state_) {
 858       memory_manager_client_state_.reset(GetMemoryManager()->CreateClientState(
 859           this, surface_id_ != 0, true));
 860     }
 861   } else {
 862     memory_manager_client_state_.reset();
 863   }
 864 }
 865
 866 void GpuCommandBufferStub::SendConsoleMessage(
 867     int32 id,
 868     const std::string& message) {
 869   GPUCommandBufferConsoleMessage console_message;
 870   console_message.id = id;
 871   console_message.message = message;
 872   IPC::Message* msg = new GpuCommandBufferMsg_ConsoleMsg(
 873       route_id_, console_message);
 874   msg->set_unblock(true);
 875   Send(msg);
 876 }
 877
 878 void GpuCommandBufferStub::SendCachedShader(
 879     const std::string& key, const std::string& shader) {
 880   channel_->CacheShader(key, shader);
 881 }
 882
 883 void GpuCommandBufferStub::AddDestructionObserver(
 884     DestructionObserver* observer) {
 885   destruction_observers_.AddObserver(observer);
 886 }
 887
 888 void GpuCommandBufferStub::RemoveDestructionObserver(
 889     DestructionObserver* observer) {
 890   destruction_observers_.RemoveObserver(observer);
 891 }
 892
 893 void GpuCommandBufferStub::SetPreemptByFlag(
 894     scoped_refptr<gpu::PreemptionFlag> flag) {
 895   preemption_flag_ = flag;
 896   if (scheduler_)
 897     scheduler_->SetPreemptByFlag(preemption_flag_);
 898 }
 899
 900 bool GpuCommandBufferStub::GetTotalGpuMemory(uint64* bytes) {
 901   *bytes = total_gpu_memory_;
 902   return !!total_gpu_memory_;
 903 }
 904
 905 gfx::Size GpuCommandBufferStub::GetSurfaceSize() const {
 906   if (!surface_.get())
 907     return gfx::Size();
 908   return surface_->GetSize();
 909 }
 910
 911 gpu::gles2::MemoryTracker* GpuCommandBufferStub::GetMemoryTracker() const {
 912   return context_group_->memory_tracker();
 913 }
 914
 915 void GpuCommandBufferStub::SetMemoryAllocation(
 916     const GpuMemoryAllocation& allocation) {
 917   if (!last_memory_allocation_valid_ ||
 918       !allocation.renderer_allocation.Equals(
 919           last_memory_allocation_.renderer_allocation)) {
 920     Send(new GpuCommandBufferMsg_SetMemoryAllocation(
 921         route_id_, allocation.renderer_allocation));
 922   }
 923
 924   if (!last_memory_allocation_valid_ ||
 925       !allocation.browser_allocation.Equals(
 926           last_memory_allocation_.browser_allocation)) {
 927     // This can be called outside of OnMessageReceived, so the context needs
 928     // to be made current before calling methods on the surface.
 929     if (surface_.get() && MakeCurrent())
 930       surface_->SetFrontbufferAllocation(
 931           allocation.browser_allocation.suggest_have_frontbuffer);
 932   }
 933
 934   last_memory_allocation_valid_ = true;
 935   last_memory_allocation_ = allocation;
 936 }
 937
 938 bool GpuCommandBufferStub::CheckContextLost() {
 939   DCHECK(command_buffer_);
 940   gpu::CommandBuffer::State state = command_buffer_->GetState();
 941   bool was_lost = state.error == gpu::error::kLostContext;
 942   // Lose all other contexts if the reset was triggered by the robustness
 943   // extension instead of being synthetic.
 944   if (was_lost && decoder_ && decoder_->WasContextLostByRobustnessExtension() &&
 945       (gfx::GLContext::LosesAllContextsOnContextLost() ||
 946        use_virtualized_gl_context_))
 947     channel_->LoseAllContexts();
 948   return was_lost;
 949 }
 950
 951 void GpuCommandBufferStub::MarkContextLost() {
 952   if (!command_buffer_ ||
 953       command_buffer_->GetState().error == gpu::error::kLostContext)
 954     return;
 955
 956   command_buffer_->SetContextLostReason(gpu::error::kUnknown);
 957   if (decoder_)
 958     decoder_->LoseContext(GL_UNKNOWN_CONTEXT_RESET_ARB);
 959   command_buffer_->SetParseError(gpu::error::kLostContext);
 960 }
 961
 962 }  // namespace content