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/devtools_gpu_instrumentation.h"
  14 #include "content/common/gpu/gpu_channel.h"
  15 #include "content/common/gpu/gpu_channel_manager.h"
  16 #include "content/common/gpu/gpu_command_buffer_stub.h"
  17 #include "content/common/gpu/gpu_memory_manager.h"
  18 #include "content/common/gpu/gpu_memory_tracking.h"
  19 #include "content/common/gpu/gpu_messages.h"
  20 #include "content/common/gpu/gpu_watchdog.h"
  21 #include "content/common/gpu/image_transport_surface.h"
  22 #include "content/common/gpu/media/gpu_video_decode_accelerator.h"
  23 #include "content/common/gpu/media/gpu_video_encode_accelerator.h"
  24 #include "content/common/gpu/sync_point_manager.h"
  25 #include "content/public/common/content_client.h"
  26 #include "gpu/command_buffer/common/constants.h"
  27 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
  28 #include "gpu/command_buffer/common/mailbox.h"
  29 #include "gpu/command_buffer/service/gl_context_virtual.h"
  30 #include "gpu/command_buffer/service/gl_state_restorer_impl.h"
  31 #include "gpu/command_buffer/service/gpu_control_service.h"
  32 #include "gpu/command_buffer/service/image_manager.h"
  33 #include "gpu/command_buffer/service/logger.h"
  34 #include "gpu/command_buffer/service/mailbox_manager.h"
  35 #include "gpu/command_buffer/service/memory_tracking.h"
  36 #include "gpu/command_buffer/service/query_manager.h"
  37 #include "ui/gl/gl_bindings.h"
  38 #include "ui/gl/gl_switches.h"
  39
  40 #if defined(OS_WIN)
  41 #include "content/public/common/sandbox_init.h"
  42 #endif
  43
  44 #if defined(OS_ANDROID)
  45 #include "content/common/gpu/stream_texture_android.h"
  46 #endif
  47
  48 namespace content {
  49 struct WaitForCommandState {
  50   WaitForCommandState(int32 start, int32 end, IPC::Message* reply)
  51       : start(start), end(end), reply(reply) {}
  52
  53   int32 start;
  54   int32 end;
  55   scoped_ptr<IPC::Message> reply;
  56 };
  57
  58 namespace {
  59
  60 // The GpuCommandBufferMemoryTracker class provides a bridge between the
  61 // ContextGroup's memory type managers and the GpuMemoryManager class.
  62 class GpuCommandBufferMemoryTracker : public gpu::gles2::MemoryTracker {
  63  public:
  64   explicit GpuCommandBufferMemoryTracker(GpuChannel* channel) :
  65       tracking_group_(channel->gpu_channel_manager()->gpu_memory_manager()->
  66           CreateTrackingGroup(channel->renderer_pid(), this)) {
  67   }
  68
  69   virtual void TrackMemoryAllocatedChange(
  70       size_t old_size,
  71       size_t new_size,
  72       gpu::gles2::MemoryTracker::Pool pool) OVERRIDE {
  73     tracking_group_->TrackMemoryAllocatedChange(
  74         old_size, new_size, pool);
  75   }
  76
  77   virtual bool EnsureGPUMemoryAvailable(size_t size_needed) OVERRIDE {
  78     return tracking_group_->EnsureGPUMemoryAvailable(size_needed);
  79   };
  80
  81  private:
  82   virtual ~GpuCommandBufferMemoryTracker() {
  83   }
  84   scoped_ptr<GpuMemoryTrackingGroup> tracking_group_;
  85
  86   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferMemoryTracker);
  87 };
  88
  89 // FastSetActiveURL will shortcut the expensive call to SetActiveURL when the
  90 // url_hash matches.
  91 void FastSetActiveURL(const GURL& url, size_t url_hash) {
  92   // Leave the previously set URL in the empty case -- empty URLs are given by
  93   // WebKitPlatformSupportImpl::createOffscreenGraphicsContext3D. Hopefully the
  94   // onscreen context URL was set previously and will show up even when a crash
  95   // occurs during offscreen command processing.
  96   if (url.is_empty())
  97     return;
  98   static size_t g_last_url_hash = 0;
  99   if (url_hash != g_last_url_hash) {
 100     g_last_url_hash = url_hash;
 101     GetContentClient()->SetActiveURL(url);
 102   }
 103 }
 104
 105 // The first time polling a fence, delay some extra time to allow other
 106 // stubs to process some work, or else the timing of the fences could
 107 // allow a pattern of alternating fast and slow frames to occur.
 108 const int64 kHandleMoreWorkPeriodMs = 2;
 109 const int64 kHandleMoreWorkPeriodBusyMs = 1;
 110
 111 // Prevents idle work from being starved.
 112 const int64 kMaxTimeSinceIdleMs = 10;
 113
 114 }  // namespace
 115
 116 GpuCommandBufferStub::GpuCommandBufferStub(
 117     GpuChannel* channel,
 118     GpuCommandBufferStub* share_group,
 119     const gfx::GLSurfaceHandle& handle,
 120     gpu::gles2::MailboxManager* mailbox_manager,
 121     gpu::gles2::ImageManager* image_manager,
 122     const gfx::Size& size,
 123     const gpu::gles2::DisallowedFeatures& disallowed_features,
 124     const std::vector<int32>& attribs,
 125     gfx::GpuPreference gpu_preference,
 126     bool use_virtualized_gl_context,
 127     int32 route_id,
 128     int32 surface_id,
 129     GpuWatchdog* watchdog,
 130     bool software,
 131     const GURL& active_url)
 132     : channel_(channel),
 133       handle_(handle),
 134       initial_size_(size),
 135       disallowed_features_(disallowed_features),
 136       requested_attribs_(attribs),
 137       gpu_preference_(gpu_preference),
 138       use_virtualized_gl_context_(use_virtualized_gl_context),
 139       route_id_(route_id),
 140       surface_id_(surface_id),
 141       software_(software),
 142       last_flush_count_(0),
 143       last_memory_allocation_valid_(false),
 144       watchdog_(watchdog),
 145       sync_point_wait_count_(0),
 146       delayed_work_scheduled_(false),
 147       previous_messages_processed_(0),
 148       active_url_(active_url),
 149       total_gpu_memory_(0) {
 150   active_url_hash_ = base::Hash(active_url.possibly_invalid_spec());
 151   FastSetActiveURL(active_url_, active_url_hash_);
 152
 153   gpu::gles2::ContextCreationAttribHelper attrib_parser;
 154   attrib_parser.Parse(requested_attribs_);
 155
 156   if (share_group) {
 157     context_group_ = share_group->context_group_;
 158     DCHECK(context_group_->bind_generates_resource() ==
 159            attrib_parser.bind_generates_resource_);
 160   } else {
 161     context_group_ = new gpu::gles2::ContextGroup(
 162         mailbox_manager,
 163         image_manager,
 164         new GpuCommandBufferMemoryTracker(channel),
 165         channel_->gpu_channel_manager()->shader_translator_cache(),
 166         NULL,
 167         attrib_parser.bind_generates_resource_);
 168   }
 169
 170   use_virtualized_gl_context_ |=
 171       context_group_->feature_info()->workarounds().use_virtualized_gl_contexts;
 172 }
 173
 174 GpuCommandBufferStub::~GpuCommandBufferStub() {
 175   Destroy();
 176
 177   GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 178   gpu_channel_manager->Send(new GpuHostMsg_DestroyCommandBuffer(surface_id()));
 179 }
 180
 181 GpuMemoryManager* GpuCommandBufferStub::GetMemoryManager() const {
 182     return channel()->gpu_channel_manager()->gpu_memory_manager();
 183 }
 184
 185 bool GpuCommandBufferStub::OnMessageReceived(const IPC::Message& message) {
 186   devtools_gpu_instrumentation::ScopedGpuTask task(channel());
 187   FastSetActiveURL(active_url_, active_url_hash_);
 188
 189   bool have_context = false;
 190   // Ensure the appropriate GL context is current before handling any IPC
 191   // messages directed at the command buffer. This ensures that the message
 192   // handler can assume that the context is current (not necessary for
 193   // Echo, RetireSyncPoint, or WaitSyncPoint).
 194   if (decoder_.get() && message.type() != GpuCommandBufferMsg_Echo::ID &&
 195       message.type() != GpuCommandBufferMsg_WaitForTokenInRange::ID &&
 196       message.type() != GpuCommandBufferMsg_WaitForGetOffsetInRange::ID &&
 197       message.type() != GpuCommandBufferMsg_RetireSyncPoint::ID &&
 198       message.type() != GpuCommandBufferMsg_SetLatencyInfo::ID) {
 199     if (!MakeCurrent())
 200       return false;
 201     have_context = true;
 202   }
 203
 204   // Always use IPC_MESSAGE_HANDLER_DELAY_REPLY for synchronous message handlers
 205   // here. This is so the reply can be delayed if the scheduler is unscheduled.
 206   bool handled = true;
 207   IPC_BEGIN_MESSAGE_MAP(GpuCommandBufferStub, message)
 208     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_Initialize,
 209                                     OnInitialize);
 210     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_SetGetBuffer,
 211                                     OnSetGetBuffer);
 212     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_ProduceFrontBuffer,
 213                         OnProduceFrontBuffer);
 214     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_Echo, OnEcho);
 215     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_WaitForTokenInRange,
 216                                     OnWaitForTokenInRange);
 217     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_WaitForGetOffsetInRange,
 218                                     OnWaitForGetOffsetInRange);
 219     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_AsyncFlush, OnAsyncFlush);
 220     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SetLatencyInfo, OnSetLatencyInfo);
 221     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_Rescheduled, OnRescheduled);
 222     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_RegisterTransferBuffer,
 223                         OnRegisterTransferBuffer);
 224     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyTransferBuffer,
 225                         OnDestroyTransferBuffer);
 226     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_CreateVideoDecoder,
 227                                     OnCreateVideoDecoder)
 228     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_CreateVideoEncoder,
 229                                     OnCreateVideoEncoder)
 230     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SetSurfaceVisible,
 231                         OnSetSurfaceVisible)
 232     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_RetireSyncPoint,
 233                         OnRetireSyncPoint)
 234     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SignalSyncPoint,
 235                         OnSignalSyncPoint)
 236     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SignalQuery,
 237                         OnSignalQuery)
 238     IPC_MESSAGE_HANDLER(
 239         GpuCommandBufferMsg_SetClientHasMemoryAllocationChangedCallback,
 240         OnSetClientHasMemoryAllocationChangedCallback)
 241     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_RegisterGpuMemoryBuffer,
 242                         OnRegisterGpuMemoryBuffer);
 243     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyGpuMemoryBuffer,
 244                         OnDestroyGpuMemoryBuffer);
 245     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_CreateStreamTexture,
 246                         OnCreateStreamTexture)
 247     IPC_MESSAGE_UNHANDLED(handled = false)
 248   IPC_END_MESSAGE_MAP()
 249
 250   CheckCompleteWaits();
 251
 252   if (have_context) {
 253     // Ensure that any delayed work that was created will be handled.
 254     ScheduleDelayedWork(kHandleMoreWorkPeriodMs);
 255   }
 256
 257   DCHECK(handled);
 258   return handled;
 259 }
 260
 261 bool GpuCommandBufferStub::Send(IPC::Message* message) {
 262   return channel_->Send(message);
 263 }
 264
 265 bool GpuCommandBufferStub::IsScheduled() {
 266   return (!scheduler_.get() || scheduler_->IsScheduled());
 267 }
 268
 269 bool GpuCommandBufferStub::HasMoreWork() {
 270   return scheduler_.get() && scheduler_->HasMoreWork();
 271 }
 272
 273 void GpuCommandBufferStub::PollWork() {
 274   TRACE_EVENT0("gpu", "GpuCommandBufferStub::PollWork");
 275   delayed_work_scheduled_ = false;
 276   FastSetActiveURL(active_url_, active_url_hash_);
 277   if (decoder_.get() && !MakeCurrent())
 278     return;
 279
 280   if (scheduler_) {
 281     bool fences_complete = scheduler_->PollUnscheduleFences();
 282     // Perform idle work if all fences are complete.
 283     if (fences_complete) {
 284       uint64 current_messages_processed =
 285           channel()->gpu_channel_manager()->MessagesProcessed();
 286       // We're idle when no messages were processed or scheduled.
 287       bool is_idle =
 288           (previous_messages_processed_ == current_messages_processed) &&
 289           !channel()->gpu_channel_manager()->HandleMessagesScheduled();
 290       if (!is_idle && !last_idle_time_.is_null()) {
 291         base::TimeDelta time_since_idle = base::TimeTicks::Now() -
 292             last_idle_time_;
 293         base::TimeDelta max_time_since_idle =
 294             base::TimeDelta::FromMilliseconds(kMaxTimeSinceIdleMs);
 295
 296         // Force idle when it's been too long since last time we were idle.
 297         if (time_since_idle > max_time_since_idle)
 298           is_idle = true;
 299       }
 300
 301       if (is_idle) {
 302         last_idle_time_ = base::TimeTicks::Now();
 303         scheduler_->PerformIdleWork();
 304       }
 305     }
 306   }
 307   ScheduleDelayedWork(kHandleMoreWorkPeriodBusyMs);
 308 }
 309
 310 bool GpuCommandBufferStub::HasUnprocessedCommands() {
 311   if (command_buffer_) {
 312     gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 313     return state.put_offset != state.get_offset &&
 314         !gpu::error::IsError(state.error);
 315   }
 316   return false;
 317 }
 318
 319 void GpuCommandBufferStub::ScheduleDelayedWork(int64 delay) {
 320   if (!HasMoreWork()) {
 321     last_idle_time_ = base::TimeTicks();
 322     return;
 323   }
 324
 325   if (delayed_work_scheduled_)
 326     return;
 327   delayed_work_scheduled_ = true;
 328
 329   // Idle when no messages are processed between now and when
 330   // PollWork is called.
 331   previous_messages_processed_ =
 332       channel()->gpu_channel_manager()->MessagesProcessed();
 333   if (last_idle_time_.is_null())
 334     last_idle_time_ = base::TimeTicks::Now();
 335
 336   // IsScheduled() returns true after passing all unschedule fences
 337   // and this is when we can start performing idle work. Idle work
 338   // is done synchronously so we can set delay to 0 and instead poll
 339   // for more work at the rate idle work is performed. This also ensures
 340   // that idle work is done as efficiently as possible without any
 341   // unnecessary delays.
 342   if (scheduler_.get() &&
 343       scheduler_->IsScheduled() &&
 344       scheduler_->HasMoreIdleWork()) {
 345     delay = 0;
 346   }
 347
 348   base::MessageLoop::current()->PostDelayedTask(
 349       FROM_HERE,
 350       base::Bind(&GpuCommandBufferStub::PollWork, AsWeakPtr()),
 351       base::TimeDelta::FromMilliseconds(delay));
 352 }
 353
 354 void GpuCommandBufferStub::OnEcho(const IPC::Message& message) {
 355   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnEcho");
 356   Send(new IPC::Message(message));
 357 }
 358
 359 bool GpuCommandBufferStub::MakeCurrent() {
 360   if (decoder_->MakeCurrent())
 361     return true;
 362   DLOG(ERROR) << "Context lost because MakeCurrent failed.";
 363   command_buffer_->SetContextLostReason(decoder_->GetContextLostReason());
 364   command_buffer_->SetParseError(gpu::error::kLostContext);
 365   CheckContextLost();
 366   return false;
 367 }
 368
 369 void GpuCommandBufferStub::Destroy() {
 370   if (wait_for_token_) {
 371     Send(wait_for_token_->reply.release());
 372     wait_for_token_.reset();
 373   }
 374   if (wait_for_get_offset_) {
 375     Send(wait_for_get_offset_->reply.release());
 376     wait_for_get_offset_.reset();
 377   }
 378   if (handle_.is_null() && !active_url_.is_empty()) {
 379     GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 380     gpu_channel_manager->Send(new GpuHostMsg_DidDestroyOffscreenContext(
 381         active_url_));
 382   }
 383
 384   memory_manager_client_state_.reset();
 385
 386   while (!sync_points_.empty())
 387     OnRetireSyncPoint(sync_points_.front());
 388
 389   if (decoder_)
 390     decoder_->set_engine(NULL);
 391
 392   // The scheduler has raw references to the decoder and the command buffer so
 393   // destroy it before those.
 394   scheduler_.reset();
 395
 396   bool have_context = false;
 397   if (decoder_ && command_buffer_ &&
 398       command_buffer_->GetLastState().error != gpu::error::kLostContext)
 399     have_context = decoder_->MakeCurrent();
 400   FOR_EACH_OBSERVER(DestructionObserver,
 401                     destruction_observers_,
 402                     OnWillDestroyStub());
 403
 404   if (decoder_) {
 405     decoder_->Destroy(have_context);
 406     decoder_.reset();
 407   }
 408
 409   command_buffer_.reset();
 410
 411   // Remove this after crbug.com/248395 is sorted out.
 412   surface_ = NULL;
 413 }
 414
 415 void GpuCommandBufferStub::OnInitializeFailed(IPC::Message* reply_message) {
 416   Destroy();
 417   GpuCommandBufferMsg_Initialize::WriteReplyParams(
 418       reply_message, false, gpu::Capabilities());
 419   Send(reply_message);
 420 }
 421
 422 void GpuCommandBufferStub::OnInitialize(
 423     base::SharedMemoryHandle shared_state_handle,
 424     IPC::Message* reply_message) {
 425   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnInitialize");
 426   DCHECK(!command_buffer_.get());
 427
 428   scoped_ptr<base::SharedMemory> shared_state_shm(
 429       new base::SharedMemory(shared_state_handle, false));
 430
 431   command_buffer_.reset(new gpu::CommandBufferService(
 432       context_group_->transfer_buffer_manager()));
 433
 434   bool result = command_buffer_->Initialize();
 435   DCHECK(result);
 436
 437   decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group_.get()));
 438
 439   scheduler_.reset(new gpu::GpuScheduler(command_buffer_.get(),
 440                                          decoder_.get(),
 441                                          decoder_.get()));
 442   if (preemption_flag_.get())
 443     scheduler_->SetPreemptByFlag(preemption_flag_);
 444
 445   decoder_->set_engine(scheduler_.get());
 446
 447   if (!handle_.is_null()) {
 448 #if defined(OS_MACOSX) || defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
 449     if (software_) {
 450       LOG(ERROR) << "No software support.";
 451       OnInitializeFailed(reply_message);
 452       return;
 453     }
 454 #endif
 455
 456     surface_ = ImageTransportSurface::CreateSurface(
 457         channel_->gpu_channel_manager(),
 458         this,
 459         handle_);
 460   } else {
 461     GpuChannelManager* manager = channel_->gpu_channel_manager();
 462     surface_ = manager->GetDefaultOffscreenSurface();
 463   }
 464
 465   if (!surface_.get()) {
 466     DLOG(ERROR) << "Failed to create surface.";
 467     OnInitializeFailed(reply_message);
 468     return;
 469   }
 470
 471   scoped_refptr<gfx::GLContext> context;
 472   if (use_virtualized_gl_context_ && channel_->share_group()) {
 473     context = channel_->share_group()->GetSharedContext();
 474     if (!context.get()) {
 475       context = gfx::GLContext::CreateGLContext(
 476           channel_->share_group(),
 477           channel_->gpu_channel_manager()->GetDefaultOffscreenSurface(),
 478           gpu_preference_);
 479       if (!context.get()) {
 480         DLOG(ERROR) << "Failed to create shared context for virtualization.";
 481         OnInitializeFailed(reply_message);
 482         return;
 483       }
 484       channel_->share_group()->SetSharedContext(context.get());
 485     }
 486     // This should be a non-virtual GL context.
 487     DCHECK(context->GetHandle());
 488     context = new gpu::GLContextVirtual(
 489         channel_->share_group(), context.get(), decoder_->AsWeakPtr());
 490     if (!context->Initialize(surface_.get(), gpu_preference_)) {
 491       // TODO(sievers): The real context created above for the default
 492       // offscreen surface might not be compatible with this surface.
 493       // Need to adjust at least GLX to be able to create the initial context
 494       // with a config that is compatible with onscreen and offscreen surfaces.
 495       context = NULL;
 496
 497       DLOG(ERROR) << "Failed to initialize virtual GL context.";
 498       OnInitializeFailed(reply_message);
 499       return;
 500     }
 501   }
 502   if (!context.get()) {
 503     context = gfx::GLContext::CreateGLContext(
 504         channel_->share_group(), surface_.get(), gpu_preference_);
 505   }
 506   if (!context.get()) {
 507     DLOG(ERROR) << "Failed to create context.";
 508     OnInitializeFailed(reply_message);
 509     return;
 510   }
 511
 512   if (!context->MakeCurrent(surface_.get())) {
 513     LOG(ERROR) << "Failed to make context current.";
 514     OnInitializeFailed(reply_message);
 515     return;
 516   }
 517
 518   if (!context->GetGLStateRestorer()) {
 519     context->SetGLStateRestorer(
 520         new gpu::GLStateRestorerImpl(decoder_->AsWeakPtr()));
 521   }
 522
 523   if (!context->GetTotalGpuMemory(&total_gpu_memory_))
 524     total_gpu_memory_ = 0;
 525
 526   if (!context_group_->has_program_cache()) {
 527     context_group_->set_program_cache(
 528         channel_->gpu_channel_manager()->program_cache());
 529   }
 530
 531   // Initialize the decoder with either the view or pbuffer GLContext.
 532   if (!decoder_->Initialize(surface_,
 533                             context,
 534                             !surface_id(),
 535                             initial_size_,
 536                             disallowed_features_,
 537                             requested_attribs_)) {
 538     DLOG(ERROR) << "Failed to initialize decoder.";
 539     OnInitializeFailed(reply_message);
 540     return;
 541   }
 542
 543   gpu_control_service_.reset(
 544       new gpu::GpuControlService(context_group_->image_manager(), NULL));
 545
 546   if (CommandLine::ForCurrentProcess()->HasSwitch(
 547       switches::kEnableGPUServiceLogging)) {
 548     decoder_->set_log_commands(true);
 549   }
 550
 551   decoder_->GetLogger()->SetMsgCallback(
 552       base::Bind(&GpuCommandBufferStub::SendConsoleMessage,
 553                  base::Unretained(this)));
 554   decoder_->SetShaderCacheCallback(
 555       base::Bind(&GpuCommandBufferStub::SendCachedShader,
 556                  base::Unretained(this)));
 557   decoder_->SetWaitSyncPointCallback(
 558       base::Bind(&GpuCommandBufferStub::OnWaitSyncPoint,
 559                  base::Unretained(this)));
 560
 561   command_buffer_->SetPutOffsetChangeCallback(
 562       base::Bind(&GpuCommandBufferStub::PutChanged, base::Unretained(this)));
 563   command_buffer_->SetGetBufferChangeCallback(
 564       base::Bind(&gpu::GpuScheduler::SetGetBuffer,
 565                  base::Unretained(scheduler_.get())));
 566   command_buffer_->SetParseErrorCallback(
 567       base::Bind(&GpuCommandBufferStub::OnParseError, base::Unretained(this)));
 568   scheduler_->SetSchedulingChangedCallback(
 569       base::Bind(&GpuChannel::StubSchedulingChanged,
 570                  base::Unretained(channel_)));
 571
 572   if (watchdog_) {
 573     scheduler_->SetCommandProcessedCallback(
 574         base::Bind(&GpuCommandBufferStub::OnCommandProcessed,
 575                    base::Unretained(this)));
 576   }
 577
 578   const size_t kSharedStateSize = sizeof(gpu::CommandBufferSharedState);
 579   if (!shared_state_shm->Map(kSharedStateSize)) {
 580     DLOG(ERROR) << "Failed to map shared state buffer.";
 581     OnInitializeFailed(reply_message);
 582     return;
 583   }
 584   command_buffer_->SetSharedStateBuffer(gpu::MakeBackingFromSharedMemory(
 585       shared_state_shm.Pass(), kSharedStateSize));
 586
 587   gpu::Capabilities capabilities = decoder_->GetCapabilities();
 588   capabilities.future_sync_points = channel_->allow_future_sync_points();
 589
 590   GpuCommandBufferMsg_Initialize::WriteReplyParams(
 591       reply_message, true, capabilities);
 592   Send(reply_message);
 593
 594   if (handle_.is_null() && !active_url_.is_empty()) {
 595     GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 596     gpu_channel_manager->Send(new GpuHostMsg_DidCreateOffscreenContext(
 597         active_url_));
 598   }
 599 }
 600
 601 void GpuCommandBufferStub::OnSetLatencyInfo(
 602     const std::vector<ui::LatencyInfo>& latency_info) {
 603   if (!ui::LatencyInfo::Verify(latency_info,
 604                                "GpuCommandBufferStub::OnSetLatencyInfo"))
 605     return;
 606   if (!latency_info_callback_.is_null())
 607     latency_info_callback_.Run(latency_info);
 608 }
 609
 610 void GpuCommandBufferStub::OnCreateStreamTexture(
 611     uint32 texture_id, int32 stream_id, bool* succeeded) {
 612 #if defined(OS_ANDROID)
 613   *succeeded = StreamTexture::Create(this, texture_id, stream_id);
 614 #else
 615   *succeeded = false;
 616 #endif
 617 }
 618
 619 void GpuCommandBufferStub::SetLatencyInfoCallback(
 620     const LatencyInfoCallback& callback) {
 621   latency_info_callback_ = callback;
 622 }
 623
 624 int32 GpuCommandBufferStub::GetRequestedAttribute(int attr) const {
 625   // The command buffer is pairs of enum, value
 626   // search for the requested attribute, return the value.
 627   for (std::vector<int32>::const_iterator it = requested_attribs_.begin();
 628        it != requested_attribs_.end(); ++it) {
 629     if (*it++ == attr) {
 630       return *it;
 631     }
 632   }
 633   return -1;
 634 }
 635
 636 void GpuCommandBufferStub::OnSetGetBuffer(int32 shm_id,
 637                                           IPC::Message* reply_message) {
 638   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnSetGetBuffer");
 639   if (command_buffer_)
 640     command_buffer_->SetGetBuffer(shm_id);
 641   Send(reply_message);
 642 }
 643
 644 void GpuCommandBufferStub::OnProduceFrontBuffer(const gpu::Mailbox& mailbox) {
 645   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnProduceFrontBuffer");
 646   if (!decoder_) {
 647     LOG(ERROR) << "Can't produce front buffer before initialization.";
 648     return;
 649   }
 650
 651   decoder_->ProduceFrontBuffer(mailbox);
 652 }
 653
 654 void GpuCommandBufferStub::OnParseError() {
 655   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnParseError");
 656   DCHECK(command_buffer_.get());
 657   gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 658   IPC::Message* msg = new GpuCommandBufferMsg_Destroyed(
 659       route_id_, state.context_lost_reason);
 660   msg->set_unblock(true);
 661   Send(msg);
 662
 663   // Tell the browser about this context loss as well, so it can
 664   // determine whether client APIs like WebGL need to be immediately
 665   // blocked from automatically running.
 666   GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 667   gpu_channel_manager->Send(new GpuHostMsg_DidLoseContext(
 668       handle_.is_null(), state.context_lost_reason, active_url_));
 669
 670   CheckContextLost();
 671 }
 672
 673 void GpuCommandBufferStub::OnWaitForTokenInRange(int32 start,
 674                                                  int32 end,
 675                                                  IPC::Message* reply_message) {
 676   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnWaitForTokenInRange");
 677   DCHECK(command_buffer_.get());
 678   CheckContextLost();
 679   if (wait_for_token_)
 680     LOG(ERROR) << "Got WaitForToken command while currently waiting for token.";
 681   wait_for_token_ =
 682       make_scoped_ptr(new WaitForCommandState(start, end, reply_message));
 683   CheckCompleteWaits();
 684 }
 685
 686 void GpuCommandBufferStub::OnWaitForGetOffsetInRange(
 687     int32 start,
 688     int32 end,
 689     IPC::Message* reply_message) {
 690   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnWaitForGetOffsetInRange");
 691   DCHECK(command_buffer_.get());
 692   CheckContextLost();
 693   if (wait_for_get_offset_) {
 694     LOG(ERROR)
 695         << "Got WaitForGetOffset command while currently waiting for offset.";
 696   }
 697   wait_for_get_offset_ =
 698       make_scoped_ptr(new WaitForCommandState(start, end, reply_message));
 699   CheckCompleteWaits();
 700 }
 701
 702 void GpuCommandBufferStub::CheckCompleteWaits() {
 703   if (wait_for_token_ || wait_for_get_offset_) {
 704     gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 705     if (wait_for_token_ &&
 706         (gpu::CommandBuffer::InRange(
 707              wait_for_token_->start, wait_for_token_->end, state.token) ||
 708          state.error != gpu::error::kNoError)) {
 709       ReportState();
 710       GpuCommandBufferMsg_WaitForTokenInRange::WriteReplyParams(
 711           wait_for_token_->reply.get(), state);
 712       Send(wait_for_token_->reply.release());
 713       wait_for_token_.reset();
 714     }
 715     if (wait_for_get_offset_ &&
 716         (gpu::CommandBuffer::InRange(wait_for_get_offset_->start,
 717                                      wait_for_get_offset_->end,
 718                                      state.get_offset) ||
 719          state.error != gpu::error::kNoError)) {
 720       ReportState();
 721       GpuCommandBufferMsg_WaitForGetOffsetInRange::WriteReplyParams(
 722           wait_for_get_offset_->reply.get(), state);
 723       Send(wait_for_get_offset_->reply.release());
 724       wait_for_get_offset_.reset();
 725     }
 726   }
 727 }
 728
 729 void GpuCommandBufferStub::OnAsyncFlush(int32 put_offset, uint32 flush_count) {
 730   TRACE_EVENT1(
 731       "gpu", "GpuCommandBufferStub::OnAsyncFlush", "put_offset", put_offset);
 732   DCHECK(command_buffer_.get());
 733   if (flush_count - last_flush_count_ < 0x8000000U) {
 734     last_flush_count_ = flush_count;
 735     command_buffer_->Flush(put_offset);
 736   } else {
 737     // We received this message out-of-order. This should not happen but is here
 738     // to catch regressions. Ignore the message.
 739     NOTREACHED() << "Received a Flush message out-of-order";
 740   }
 741
 742   ReportState();
 743 }
 744
 745 void GpuCommandBufferStub::OnRescheduled() {
 746   gpu::CommandBuffer::State pre_state = command_buffer_->GetLastState();
 747   command_buffer_->Flush(pre_state.put_offset);
 748   gpu::CommandBuffer::State post_state = command_buffer_->GetLastState();
 749
 750   if (pre_state.get_offset != post_state.get_offset)
 751     ReportState();
 752 }
 753
 754 void GpuCommandBufferStub::OnRegisterTransferBuffer(
 755     int32 id,
 756     base::SharedMemoryHandle transfer_buffer,
 757     uint32 size) {
 758   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnRegisterTransferBuffer");
 759
 760   // Take ownership of the memory and map it into this process.
 761   // This validates the size.
 762   scoped_ptr<base::SharedMemory> shared_memory(
 763       new base::SharedMemory(transfer_buffer, false));
 764   if (!shared_memory->Map(size)) {
 765     DVLOG(0) << "Failed to map shared memory.";
 766     return;
 767   }
 768
 769   if (command_buffer_) {
 770     command_buffer_->RegisterTransferBuffer(
 771         id, gpu::MakeBackingFromSharedMemory(shared_memory.Pass(), size));
 772   }
 773 }
 774
 775 void GpuCommandBufferStub::OnDestroyTransferBuffer(int32 id) {
 776   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyTransferBuffer");
 777
 778   if (command_buffer_)
 779     command_buffer_->DestroyTransferBuffer(id);
 780 }
 781
 782 void GpuCommandBufferStub::OnCommandProcessed() {
 783   if (watchdog_)
 784     watchdog_->CheckArmed();
 785 }
 786
 787 void GpuCommandBufferStub::ReportState() { command_buffer_->UpdateState(); }
 788
 789 void GpuCommandBufferStub::PutChanged() {
 790   FastSetActiveURL(active_url_, active_url_hash_);
 791   scheduler_->PutChanged();
 792 }
 793
 794 void GpuCommandBufferStub::OnCreateVideoDecoder(
 795     media::VideoCodecProfile profile,
 796     int32 decoder_route_id,
 797     IPC::Message* reply_message) {
 798   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateVideoDecoder");
 799   GpuVideoDecodeAccelerator* decoder = new GpuVideoDecodeAccelerator(
 800       decoder_route_id, this, channel_->io_message_loop());
 801   decoder->Initialize(profile, reply_message);
 802   // decoder is registered as a DestructionObserver of this stub and will
 803   // self-delete during destruction of this stub.
 804 }
 805
 806 void GpuCommandBufferStub::OnCreateVideoEncoder(
 807     media::VideoFrame::Format input_format,
 808     const gfx::Size& input_visible_size,
 809     media::VideoCodecProfile output_profile,
 810     uint32 initial_bitrate,
 811     int32 encoder_route_id,
 812     IPC::Message* reply_message) {
 813   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateVideoEncoder");
 814   GpuVideoEncodeAccelerator* encoder =
 815       new GpuVideoEncodeAccelerator(encoder_route_id, this);
 816   encoder->Initialize(input_format,
 817                       input_visible_size,
 818                       output_profile,
 819                       initial_bitrate,
 820                       reply_message);
 821   // encoder is registered as a DestructionObserver of this stub and will
 822   // self-delete during destruction of this stub.
 823 }
 824
 825 void GpuCommandBufferStub::OnSetSurfaceVisible(bool visible) {
 826   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnSetSurfaceVisible");
 827   if (memory_manager_client_state_)
 828     memory_manager_client_state_->SetVisible(visible);
 829 }
 830
 831 void GpuCommandBufferStub::AddSyncPoint(uint32 sync_point) {
 832   sync_points_.push_back(sync_point);
 833 }
 834
 835 void GpuCommandBufferStub::OnRetireSyncPoint(uint32 sync_point) {
 836   DCHECK(!sync_points_.empty() && sync_points_.front() == sync_point);
 837   sync_points_.pop_front();
 838   if (context_group_->mailbox_manager()->UsesSync() && MakeCurrent())
 839     context_group_->mailbox_manager()->PushTextureUpdates();
 840   GpuChannelManager* manager = channel_->gpu_channel_manager();
 841   manager->sync_point_manager()->RetireSyncPoint(sync_point);
 842 }
 843
 844 bool GpuCommandBufferStub::OnWaitSyncPoint(uint32 sync_point) {
 845   if (!sync_point)
 846     return true;
 847   GpuChannelManager* manager = channel_->gpu_channel_manager();
 848   if (manager->sync_point_manager()->IsSyncPointRetired(sync_point))
 849     return true;
 850
 851   if (sync_point_wait_count_ == 0) {
 852     TRACE_EVENT_ASYNC_BEGIN1("gpu", "WaitSyncPoint", this,
 853                              "GpuCommandBufferStub", this);
 854   }
 855   scheduler_->SetScheduled(false);
 856   ++sync_point_wait_count_;
 857   manager->sync_point_manager()->AddSyncPointCallback(
 858       sync_point,
 859       base::Bind(&GpuCommandBufferStub::OnSyncPointRetired,
 860                  this->AsWeakPtr()));
 861   return scheduler_->IsScheduled();
 862 }
 863
 864 void GpuCommandBufferStub::OnSyncPointRetired() {
 865   --sync_point_wait_count_;
 866   if (sync_point_wait_count_ == 0) {
 867     TRACE_EVENT_ASYNC_END1("gpu", "WaitSyncPoint", this,
 868                            "GpuCommandBufferStub", this);
 869   }
 870   scheduler_->SetScheduled(true);
 871 }
 872
 873 void GpuCommandBufferStub::OnSignalSyncPoint(uint32 sync_point, uint32 id) {
 874   GpuChannelManager* manager = channel_->gpu_channel_manager();
 875   manager->sync_point_manager()->AddSyncPointCallback(
 876       sync_point,
 877       base::Bind(&GpuCommandBufferStub::OnSignalSyncPointAck,
 878                  this->AsWeakPtr(),
 879                  id));
 880 }
 881
 882 void GpuCommandBufferStub::OnSignalSyncPointAck(uint32 id) {
 883   Send(new GpuCommandBufferMsg_SignalSyncPointAck(route_id_, id));
 884 }
 885
 886 void GpuCommandBufferStub::OnSignalQuery(uint32 query_id, uint32 id) {
 887   if (decoder_) {
 888     gpu::gles2::QueryManager* query_manager = decoder_->GetQueryManager();
 889     if (query_manager) {
 890       gpu::gles2::QueryManager::Query* query =
 891           query_manager->GetQuery(query_id);
 892       if (query) {
 893         query->AddCallback(
 894           base::Bind(&GpuCommandBufferStub::OnSignalSyncPointAck,
 895                      this->AsWeakPtr(),
 896                      id));
 897         return;
 898       }
 899     }
 900   }
 901   // Something went wrong, run callback immediately.
 902   OnSignalSyncPointAck(id);
 903 }
 904
 905
 906 void GpuCommandBufferStub::OnSetClientHasMemoryAllocationChangedCallback(
 907     bool has_callback) {
 908   TRACE_EVENT0(
 909       "gpu",
 910       "GpuCommandBufferStub::OnSetClientHasMemoryAllocationChangedCallback");
 911   if (has_callback) {
 912     if (!memory_manager_client_state_) {
 913       memory_manager_client_state_.reset(GetMemoryManager()->CreateClientState(
 914           this, surface_id_ != 0, true));
 915     }
 916   } else {
 917     memory_manager_client_state_.reset();
 918   }
 919 }
 920
 921 void GpuCommandBufferStub::OnRegisterGpuMemoryBuffer(
 922     int32 id,
 923     gfx::GpuMemoryBufferHandle gpu_memory_buffer,
 924     uint32 width,
 925     uint32 height,
 926     uint32 internalformat) {
 927   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnRegisterGpuMemoryBuffer");
 928 #if defined(OS_ANDROID)
 929   // Verify that renderer is not trying to use a surface texture it doesn't own.
 930   if (gpu_memory_buffer.type == gfx::SURFACE_TEXTURE_BUFFER &&
 931       gpu_memory_buffer.surface_texture_id.secondary_id !=
 932           channel()->client_id()) {
 933     LOG(ERROR) << "Illegal surface texture ID for renderer.";
 934     return;
 935   }
 936 #endif
 937   if (gpu_control_service_) {
 938     gpu_control_service_->RegisterGpuMemoryBuffer(
 939         id, gpu_memory_buffer, width, height, internalformat);
 940   }
 941 }
 942
 943 void GpuCommandBufferStub::OnDestroyGpuMemoryBuffer(int32 id) {
 944   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyGpuMemoryBuffer");
 945   if (gpu_control_service_)
 946     gpu_control_service_->UnregisterGpuMemoryBuffer(id);
 947 }
 948
 949 void GpuCommandBufferStub::SendConsoleMessage(
 950     int32 id,
 951     const std::string& message) {
 952   GPUCommandBufferConsoleMessage console_message;
 953   console_message.id = id;
 954   console_message.message = message;
 955   IPC::Message* msg = new GpuCommandBufferMsg_ConsoleMsg(
 956       route_id_, console_message);
 957   msg->set_unblock(true);
 958   Send(msg);
 959 }
 960
 961 void GpuCommandBufferStub::SendCachedShader(
 962     const std::string& key, const std::string& shader) {
 963   channel_->CacheShader(key, shader);
 964 }
 965
 966 void GpuCommandBufferStub::AddDestructionObserver(
 967     DestructionObserver* observer) {
 968   destruction_observers_.AddObserver(observer);
 969 }
 970
 971 void GpuCommandBufferStub::RemoveDestructionObserver(
 972     DestructionObserver* observer) {
 973   destruction_observers_.RemoveObserver(observer);
 974 }
 975
 976 void GpuCommandBufferStub::SetPreemptByFlag(
 977     scoped_refptr<gpu::PreemptionFlag> flag) {
 978   preemption_flag_ = flag;
 979   if (scheduler_)
 980     scheduler_->SetPreemptByFlag(preemption_flag_);
 981 }
 982
 983 bool GpuCommandBufferStub::GetTotalGpuMemory(uint64* bytes) {
 984   *bytes = total_gpu_memory_;
 985   return !!total_gpu_memory_;
 986 }
 987
 988 gfx::Size GpuCommandBufferStub::GetSurfaceSize() const {
 989   if (!surface_.get())
 990     return gfx::Size();
 991   return surface_->GetSize();
 992 }
 993
 994 gpu::gles2::MemoryTracker* GpuCommandBufferStub::GetMemoryTracker() const {
 995   return context_group_->memory_tracker();
 996 }
 997
 998 void GpuCommandBufferStub::SetMemoryAllocation(
 999     const gpu::MemoryAllocation& allocation) {
1000   if (!last_memory_allocation_valid_ ||
1001       !allocation.Equals(last_memory_allocation_)) {
1002     Send(new GpuCommandBufferMsg_SetMemoryAllocation(
1003         route_id_, allocation));
1004   }
1005
1006   last_memory_allocation_valid_ = true;
1007   last_memory_allocation_ = allocation;
1008 }
1009
1010 void GpuCommandBufferStub::SuggestHaveFrontBuffer(
1011     bool suggest_have_frontbuffer) {
1012   // This can be called outside of OnMessageReceived, so the context needs
1013   // to be made current before calling methods on the surface.
1014   if (surface_.get() && MakeCurrent())
1015     surface_->SetFrontbufferAllocation(suggest_have_frontbuffer);
1016 }
1017
1018 bool GpuCommandBufferStub::CheckContextLost() {
1019   DCHECK(command_buffer_);
1020   gpu::CommandBuffer::State state = command_buffer_->GetLastState();
1021   bool was_lost = state.error == gpu::error::kLostContext;
1022   // Lose all other contexts if the reset was triggered by the robustness
1023   // extension instead of being synthetic.
1024   if (was_lost && decoder_ && decoder_->WasContextLostByRobustnessExtension() &&
1025       (gfx::GLContext::LosesAllContextsOnContextLost() ||
1026        use_virtualized_gl_context_))
1027     channel_->LoseAllContexts();
1028   CheckCompleteWaits();
1029   return was_lost;
1030 }
1031
1032 void GpuCommandBufferStub::MarkContextLost() {
1033   if (!command_buffer_ ||
1034       command_buffer_->GetLastState().error == gpu::error::kLostContext)
1035     return;
1036
1037   command_buffer_->SetContextLostReason(gpu::error::kUnknown);
1038   if (decoder_)
1039     decoder_->LoseContext(GL_UNKNOWN_CONTEXT_RESET_ARB);
1040   command_buffer_->SetParseError(gpu::error::kLostContext);
1041 }
1042
1043 uint64 GpuCommandBufferStub::GetMemoryUsage() const {
1044   return GetMemoryManager()->GetClientMemoryUsage(this);
1045 }
1046
1047 }  // namespace content