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/hash.h"
   9 #include "base/json/json_writer.h"
  10 #include "base/memory/shared_memory.h"
  11 #include "base/time/time.h"
  12 #include "base/trace_event/trace_event.h"
  13 #include "build/build_config.h"
  14 #include "content/common/gpu/devtools_gpu_instrumentation.h"
  15 #include "content/common/gpu/gpu_channel.h"
  16 #include "content/common/gpu/gpu_channel_manager.h"
  17 #include "content/common/gpu/gpu_command_buffer_stub.h"
  18 #include "content/common/gpu/gpu_memory_manager.h"
  19 #include "content/common/gpu/gpu_memory_tracking.h"
  20 #include "content/common/gpu/gpu_messages.h"
  21 #include "content/common/gpu/gpu_watchdog.h"
  22 #include "content/common/gpu/image_transport_surface.h"
  23 #include "content/common/gpu/media/gpu_video_decode_accelerator.h"
  24 #include "content/common/gpu/media/gpu_video_encode_accelerator.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/image_manager.h"
  32 #include "gpu/command_buffer/service/logger.h"
  33 #include "gpu/command_buffer/service/mailbox_manager.h"
  34 #include "gpu/command_buffer/service/memory_tracking.h"
  35 #include "gpu/command_buffer/service/query_manager.h"
  36 #include "gpu/command_buffer/service/sync_point_manager.h"
  37 #include "gpu/command_buffer/service/valuebuffer_manager.h"
  38 #include "ui/gl/gl_bindings.h"
  39 #include "ui/gl/gl_switches.h"
  40
  41 #if defined(OS_WIN)
  42 #include "content/public/common/sandbox_init.h"
  43 #endif
  44
  45 #if defined(OS_ANDROID)
  46 #include "content/common/gpu/stream_texture_android.h"
  47 #endif
  48
  49 namespace content {
  50 struct WaitForCommandState {
  51   WaitForCommandState(int32 start, int32 end, IPC::Message* reply)
  52       : start(start), end(end), reply(reply) {}
  53
  54   int32 start;
  55   int32 end;
  56   scoped_ptr<IPC::Message> reply;
  57 };
  58
  59 namespace {
  60
  61 // The GpuCommandBufferMemoryTracker class provides a bridge between the
  62 // ContextGroup's memory type managers and the GpuMemoryManager class.
  63 class GpuCommandBufferMemoryTracker : public gpu::gles2::MemoryTracker {
  64  public:
  65   explicit GpuCommandBufferMemoryTracker(GpuChannel* channel) :
  66       tracking_group_(channel->gpu_channel_manager()->gpu_memory_manager()->
  67           CreateTrackingGroup(channel->renderer_pid(), this)) {
  68   }
  69
  70   void TrackMemoryAllocatedChange(
  71       size_t old_size,
  72       size_t new_size,
  73       gpu::gles2::MemoryTracker::Pool pool) override {
  74     tracking_group_->TrackMemoryAllocatedChange(
  75         old_size, new_size, pool);
  76   }
  77
  78   bool EnsureGPUMemoryAvailable(size_t size_needed) override {
  79     return tracking_group_->EnsureGPUMemoryAvailable(size_needed);
  80   };
  81
  82  private:
  83   ~GpuCommandBufferMemoryTracker() override {}
  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   // BlinkPlatformImpl::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 class DevToolsChannelData : public base::trace_event::ConvertableToTraceFormat {
 115  public:
 116   static scoped_refptr<base::trace_event::ConvertableToTraceFormat>
 117   CreateForChannel(GpuChannel* channel);
 118
 119   void AppendAsTraceFormat(std::string* out) const override {
 120     std::string tmp;
 121     base::JSONWriter::Write(value_.get(), &tmp);
 122     *out += tmp;
 123   }
 124
 125  private:
 126   explicit DevToolsChannelData(base::Value* value) : value_(value) {}
 127   ~DevToolsChannelData() override {}
 128   scoped_ptr<base::Value> value_;
 129   DISALLOW_COPY_AND_ASSIGN(DevToolsChannelData);
 130 };
 131
 132 scoped_refptr<base::trace_event::ConvertableToTraceFormat>
 133 DevToolsChannelData::CreateForChannel(GpuChannel* channel) {
 134   scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue);
 135   res->SetInteger("renderer_pid", channel->renderer_pid());
 136   res->SetDouble("used_bytes", channel->GetMemoryUsage());
 137   res->SetDouble("limit_bytes",
 138                  channel->gpu_channel_manager()
 139                      ->gpu_memory_manager()
 140                      ->GetMaximumClientAllocation());
 141   return new DevToolsChannelData(res.release());
 142 }
 143
 144 }  // namespace
 145
 146 GpuCommandBufferStub::GpuCommandBufferStub(
 147     GpuChannel* channel,
 148     GpuCommandBufferStub* share_group,
 149     const gfx::GLSurfaceHandle& handle,
 150     gpu::gles2::MailboxManager* mailbox_manager,
 151     gpu::gles2::SubscriptionRefSet* subscription_ref_set,
 152     gpu::ValueStateMap* pending_valuebuffer_state,
 153     const gfx::Size& size,
 154     const gpu::gles2::DisallowedFeatures& disallowed_features,
 155     const std::vector<int32>& attribs,
 156     gfx::GpuPreference gpu_preference,
 157     bool use_virtualized_gl_context,
 158     int32 route_id,
 159     int32 surface_id,
 160     GpuWatchdog* watchdog,
 161     bool software,
 162     const GURL& active_url)
 163     : channel_(channel),
 164       handle_(handle),
 165       initial_size_(size),
 166       disallowed_features_(disallowed_features),
 167       requested_attribs_(attribs),
 168       gpu_preference_(gpu_preference),
 169       use_virtualized_gl_context_(use_virtualized_gl_context),
 170       route_id_(route_id),
 171       surface_id_(surface_id),
 172       software_(software),
 173       last_flush_count_(0),
 174       last_memory_allocation_valid_(false),
 175       watchdog_(watchdog),
 176       sync_point_wait_count_(0),
 177       delayed_work_scheduled_(false),
 178       previous_messages_processed_(0),
 179       active_url_(active_url),
 180       total_gpu_memory_(0) {
 181   active_url_hash_ = base::Hash(active_url.possibly_invalid_spec());
 182   FastSetActiveURL(active_url_, active_url_hash_);
 183
 184   gpu::gles2::ContextCreationAttribHelper attrib_parser;
 185   attrib_parser.Parse(requested_attribs_);
 186
 187   if (share_group) {
 188     context_group_ = share_group->context_group_;
 189     DCHECK(context_group_->bind_generates_resource() ==
 190            attrib_parser.bind_generates_resource);
 191   } else {
 192     context_group_ = new gpu::gles2::ContextGroup(
 193         mailbox_manager,
 194         new GpuCommandBufferMemoryTracker(channel),
 195         channel_->gpu_channel_manager()->shader_translator_cache(),
 196         NULL,
 197         subscription_ref_set,
 198         pending_valuebuffer_state,
 199         attrib_parser.bind_generates_resource);
 200   }
 201
 202   use_virtualized_gl_context_ |=
 203       context_group_->feature_info()->workarounds().use_virtualized_gl_contexts;
 204 }
 205
 206 GpuCommandBufferStub::~GpuCommandBufferStub() {
 207   Destroy();
 208
 209   GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 210   gpu_channel_manager->Send(new GpuHostMsg_DestroyCommandBuffer(surface_id()));
 211 }
 212
 213 GpuMemoryManager* GpuCommandBufferStub::GetMemoryManager() const {
 214     return channel()->gpu_channel_manager()->gpu_memory_manager();
 215 }
 216
 217 bool GpuCommandBufferStub::OnMessageReceived(const IPC::Message& message) {
 218   TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"),
 219                "GPUTask",
 220                "data",
 221                DevToolsChannelData::CreateForChannel(channel()));
 222   // TODO(yurys): remove devtools_gpu_instrumentation call once DevTools
 223   // Timeline migrates to tracing crbug.com/361045.
 224   devtools_gpu_instrumentation::ScopedGpuTask task(channel());
 225   FastSetActiveURL(active_url_, active_url_hash_);
 226
 227   bool have_context = false;
 228   // Ensure the appropriate GL context is current before handling any IPC
 229   // messages directed at the command buffer. This ensures that the message
 230   // handler can assume that the context is current (not necessary for
 231   // RetireSyncPoint or WaitSyncPoint).
 232   if (decoder_.get() &&
 233       message.type() != GpuCommandBufferMsg_SetGetBuffer::ID &&
 234       message.type() != GpuCommandBufferMsg_WaitForTokenInRange::ID &&
 235       message.type() != GpuCommandBufferMsg_WaitForGetOffsetInRange::ID &&
 236       message.type() != GpuCommandBufferMsg_RegisterTransferBuffer::ID &&
 237       message.type() != GpuCommandBufferMsg_DestroyTransferBuffer::ID &&
 238       message.type() != GpuCommandBufferMsg_RetireSyncPoint::ID &&
 239       message.type() != GpuCommandBufferMsg_SignalSyncPoint::ID &&
 240       message.type() !=
 241           GpuCommandBufferMsg_SetClientHasMemoryAllocationChangedCallback::ID) {
 242     if (!MakeCurrent())
 243       return false;
 244     have_context = true;
 245   }
 246
 247   // Always use IPC_MESSAGE_HANDLER_DELAY_REPLY for synchronous message handlers
 248   // here. This is so the reply can be delayed if the scheduler is unscheduled.
 249   bool handled = true;
 250   IPC_BEGIN_MESSAGE_MAP(GpuCommandBufferStub, message)
 251     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_Initialize,
 252                                     OnInitialize);
 253     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_SetGetBuffer,
 254                                     OnSetGetBuffer);
 255     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_ProduceFrontBuffer,
 256                         OnProduceFrontBuffer);
 257     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_WaitForTokenInRange,
 258                                     OnWaitForTokenInRange);
 259     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_WaitForGetOffsetInRange,
 260                                     OnWaitForGetOffsetInRange);
 261     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_AsyncFlush, OnAsyncFlush);
 262     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_Rescheduled, OnRescheduled);
 263     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_RegisterTransferBuffer,
 264                         OnRegisterTransferBuffer);
 265     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyTransferBuffer,
 266                         OnDestroyTransferBuffer);
 267     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_CreateVideoDecoder,
 268                                     OnCreateVideoDecoder)
 269     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuCommandBufferMsg_CreateVideoEncoder,
 270                                     OnCreateVideoEncoder)
 271     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SetSurfaceVisible,
 272                         OnSetSurfaceVisible)
 273     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_RetireSyncPoint,
 274                         OnRetireSyncPoint)
 275     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SignalSyncPoint,
 276                         OnSignalSyncPoint)
 277     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SignalQuery,
 278                         OnSignalQuery)
 279     IPC_MESSAGE_HANDLER(
 280         GpuCommandBufferMsg_SetClientHasMemoryAllocationChangedCallback,
 281         OnSetClientHasMemoryAllocationChangedCallback)
 282     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_CreateImage, OnCreateImage);
 283     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyImage, OnDestroyImage);
 284     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_CreateStreamTexture,
 285                         OnCreateStreamTexture)
 286     IPC_MESSAGE_UNHANDLED(handled = false)
 287   IPC_END_MESSAGE_MAP()
 288
 289   CheckCompleteWaits();
 290
 291   if (have_context) {
 292     // Ensure that any delayed work that was created will be handled.
 293     ScheduleDelayedWork(kHandleMoreWorkPeriodMs);
 294   }
 295
 296   DCHECK(handled);
 297   return handled;
 298 }
 299
 300 bool GpuCommandBufferStub::Send(IPC::Message* message) {
 301   return channel_->Send(message);
 302 }
 303
 304 bool GpuCommandBufferStub::IsScheduled() {
 305   return (!scheduler_.get() || scheduler_->IsScheduled());
 306 }
 307
 308 bool GpuCommandBufferStub::HasMoreWork() {
 309   return scheduler_.get() && scheduler_->HasMoreWork();
 310 }
 311
 312 void GpuCommandBufferStub::PollWork() {
 313   TRACE_EVENT0("gpu", "GpuCommandBufferStub::PollWork");
 314   delayed_work_scheduled_ = false;
 315   FastSetActiveURL(active_url_, active_url_hash_);
 316   if (decoder_.get() && !MakeCurrent())
 317     return;
 318
 319   if (scheduler_) {
 320     uint64 current_messages_processed =
 321         channel()->gpu_channel_manager()->MessagesProcessed();
 322     // We're idle when no messages were processed or scheduled.
 323     bool is_idle =
 324         (previous_messages_processed_ == current_messages_processed) &&
 325         !channel()->gpu_channel_manager()->HandleMessagesScheduled();
 326     if (!is_idle && !last_idle_time_.is_null()) {
 327       base::TimeDelta time_since_idle =
 328           base::TimeTicks::Now() - last_idle_time_;
 329       base::TimeDelta max_time_since_idle =
 330           base::TimeDelta::FromMilliseconds(kMaxTimeSinceIdleMs);
 331
 332       // Force idle when it's been too long since last time we were idle.
 333       if (time_since_idle > max_time_since_idle)
 334         is_idle = true;
 335     }
 336
 337     if (is_idle) {
 338       last_idle_time_ = base::TimeTicks::Now();
 339       scheduler_->PerformIdleWork();
 340     }
 341   }
 342   ScheduleDelayedWork(kHandleMoreWorkPeriodBusyMs);
 343 }
 344
 345 bool GpuCommandBufferStub::HasUnprocessedCommands() {
 346   if (command_buffer_) {
 347     gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 348     return command_buffer_->GetPutOffset() != state.get_offset &&
 349         !gpu::error::IsError(state.error);
 350   }
 351   return false;
 352 }
 353
 354 void GpuCommandBufferStub::ScheduleDelayedWork(int64 delay) {
 355   if (!HasMoreWork()) {
 356     last_idle_time_ = base::TimeTicks();
 357     return;
 358   }
 359
 360   if (delayed_work_scheduled_)
 361     return;
 362   delayed_work_scheduled_ = true;
 363
 364   // Idle when no messages are processed between now and when
 365   // PollWork is called.
 366   previous_messages_processed_ =
 367       channel()->gpu_channel_manager()->MessagesProcessed();
 368   if (last_idle_time_.is_null())
 369     last_idle_time_ = base::TimeTicks::Now();
 370
 371   // IsScheduled() returns true after passing all unschedule fences
 372   // and this is when we can start performing idle work. Idle work
 373   // is done synchronously so we can set delay to 0 and instead poll
 374   // for more work at the rate idle work is performed. This also ensures
 375   // that idle work is done as efficiently as possible without any
 376   // unnecessary delays.
 377   if (scheduler_.get() &&
 378       scheduler_->IsScheduled() &&
 379       scheduler_->HasMoreIdleWork()) {
 380     delay = 0;
 381   }
 382
 383   base::MessageLoop::current()->PostDelayedTask(
 384       FROM_HERE,
 385       base::Bind(&GpuCommandBufferStub::PollWork, AsWeakPtr()),
 386       base::TimeDelta::FromMilliseconds(delay));
 387 }
 388
 389 bool GpuCommandBufferStub::MakeCurrent() {
 390   if (decoder_->MakeCurrent())
 391     return true;
 392   DLOG(ERROR) << "Context lost because MakeCurrent failed.";
 393   command_buffer_->SetContextLostReason(decoder_->GetContextLostReason());
 394   command_buffer_->SetParseError(gpu::error::kLostContext);
 395   CheckContextLost();
 396   return false;
 397 }
 398
 399 void GpuCommandBufferStub::Destroy() {
 400   if (wait_for_token_) {
 401     Send(wait_for_token_->reply.release());
 402     wait_for_token_.reset();
 403   }
 404   if (wait_for_get_offset_) {
 405     Send(wait_for_get_offset_->reply.release());
 406     wait_for_get_offset_.reset();
 407   }
 408   if (handle_.is_null() && !active_url_.is_empty()) {
 409     GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 410     gpu_channel_manager->Send(new GpuHostMsg_DidDestroyOffscreenContext(
 411         active_url_));
 412   }
 413
 414   memory_manager_client_state_.reset();
 415
 416   while (!sync_points_.empty())
 417     OnRetireSyncPoint(sync_points_.front());
 418
 419   if (decoder_)
 420     decoder_->set_engine(NULL);
 421
 422   // The scheduler has raw references to the decoder and the command buffer so
 423   // destroy it before those.
 424   scheduler_.reset();
 425
 426   bool have_context = false;
 427   if (decoder_ && command_buffer_ &&
 428       command_buffer_->GetLastState().error != gpu::error::kLostContext)
 429     have_context = decoder_->MakeCurrent();
 430   FOR_EACH_OBSERVER(DestructionObserver,
 431                     destruction_observers_,
 432                     OnWillDestroyStub());
 433
 434   if (decoder_) {
 435     decoder_->Destroy(have_context);
 436     decoder_.reset();
 437   }
 438
 439   command_buffer_.reset();
 440
 441   // Remove this after crbug.com/248395 is sorted out.
 442   surface_ = NULL;
 443 }
 444
 445 void GpuCommandBufferStub::OnInitializeFailed(IPC::Message* reply_message) {
 446   Destroy();
 447   GpuCommandBufferMsg_Initialize::WriteReplyParams(
 448       reply_message, false, gpu::Capabilities());
 449   Send(reply_message);
 450 }
 451
 452 void GpuCommandBufferStub::OnInitialize(
 453     base::SharedMemoryHandle shared_state_handle,
 454     IPC::Message* reply_message) {
 455   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnInitialize");
 456   DCHECK(!command_buffer_.get());
 457
 458   scoped_ptr<base::SharedMemory> shared_state_shm(
 459       new base::SharedMemory(shared_state_handle, false));
 460
 461   command_buffer_.reset(new gpu::CommandBufferService(
 462       context_group_->transfer_buffer_manager()));
 463
 464   bool result = command_buffer_->Initialize();
 465   DCHECK(result);
 466
 467   decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group_.get()));
 468
 469   scheduler_.reset(new gpu::GpuScheduler(command_buffer_.get(),
 470                                          decoder_.get(),
 471                                          decoder_.get()));
 472   if (preemption_flag_.get())
 473     scheduler_->SetPreemptByFlag(preemption_flag_);
 474
 475   decoder_->set_engine(scheduler_.get());
 476
 477   if (!handle_.is_null()) {
 478 #if defined(OS_MACOSX) || defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
 479     if (software_) {
 480       LOG(ERROR) << "No software support.";
 481       OnInitializeFailed(reply_message);
 482       return;
 483     }
 484 #endif
 485
 486     surface_ = ImageTransportSurface::CreateSurface(
 487         channel_->gpu_channel_manager(),
 488         this,
 489         handle_);
 490   } else {
 491     GpuChannelManager* manager = channel_->gpu_channel_manager();
 492     surface_ = manager->GetDefaultOffscreenSurface();
 493   }
 494
 495   if (!surface_.get()) {
 496     DLOG(ERROR) << "Failed to create surface.";
 497     OnInitializeFailed(reply_message);
 498     return;
 499   }
 500
 501   scoped_refptr<gfx::GLContext> context;
 502   if (use_virtualized_gl_context_ && channel_->share_group()) {
 503     context = channel_->share_group()->GetSharedContext();
 504     if (!context.get()) {
 505       context = gfx::GLContext::CreateGLContext(
 506           channel_->share_group(),
 507           channel_->gpu_channel_manager()->GetDefaultOffscreenSurface(),
 508           gpu_preference_);
 509       if (!context.get()) {
 510         DLOG(ERROR) << "Failed to create shared context for virtualization.";
 511         OnInitializeFailed(reply_message);
 512         return;
 513       }
 514       channel_->share_group()->SetSharedContext(context.get());
 515     }
 516     // This should be a non-virtual GL context.
 517     DCHECK(context->GetHandle());
 518     context = new gpu::GLContextVirtual(
 519         channel_->share_group(), context.get(), decoder_->AsWeakPtr());
 520     if (!context->Initialize(surface_.get(), gpu_preference_)) {
 521       // TODO(sievers): The real context created above for the default
 522       // offscreen surface might not be compatible with this surface.
 523       // Need to adjust at least GLX to be able to create the initial context
 524       // with a config that is compatible with onscreen and offscreen surfaces.
 525       context = NULL;
 526
 527       DLOG(ERROR) << "Failed to initialize virtual GL context.";
 528       OnInitializeFailed(reply_message);
 529       return;
 530     }
 531   }
 532   if (!context.get()) {
 533     context = gfx::GLContext::CreateGLContext(
 534         channel_->share_group(), surface_.get(), gpu_preference_);
 535   }
 536   if (!context.get()) {
 537     DLOG(ERROR) << "Failed to create context.";
 538     OnInitializeFailed(reply_message);
 539     return;
 540   }
 541
 542   if (!context->MakeCurrent(surface_.get())) {
 543     LOG(ERROR) << "Failed to make context current.";
 544     OnInitializeFailed(reply_message);
 545     return;
 546   }
 547
 548   if (!context->GetGLStateRestorer()) {
 549     context->SetGLStateRestorer(
 550         new gpu::GLStateRestorerImpl(decoder_->AsWeakPtr()));
 551   }
 552
 553   if (!context->GetTotalGpuMemory(&total_gpu_memory_))
 554     total_gpu_memory_ = 0;
 555
 556   if (!context_group_->has_program_cache()) {
 557     context_group_->set_program_cache(
 558         channel_->gpu_channel_manager()->program_cache());
 559   }
 560
 561   // Initialize the decoder with either the view or pbuffer GLContext.
 562   if (!decoder_->Initialize(surface_,
 563                             context,
 564                             !surface_id(),
 565                             initial_size_,
 566                             disallowed_features_,
 567                             requested_attribs_)) {
 568     DLOG(ERROR) << "Failed to initialize decoder.";
 569     OnInitializeFailed(reply_message);
 570     return;
 571   }
 572
 573   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 574           switches::kEnableGPUServiceLogging)) {
 575     decoder_->set_log_commands(true);
 576   }
 577
 578   decoder_->GetLogger()->SetMsgCallback(
 579       base::Bind(&GpuCommandBufferStub::SendConsoleMessage,
 580                  base::Unretained(this)));
 581   decoder_->SetShaderCacheCallback(
 582       base::Bind(&GpuCommandBufferStub::SendCachedShader,
 583                  base::Unretained(this)));
 584   decoder_->SetWaitSyncPointCallback(
 585       base::Bind(&GpuCommandBufferStub::OnWaitSyncPoint,
 586                  base::Unretained(this)));
 587
 588   command_buffer_->SetPutOffsetChangeCallback(
 589       base::Bind(&GpuCommandBufferStub::PutChanged, base::Unretained(this)));
 590   command_buffer_->SetGetBufferChangeCallback(
 591       base::Bind(&gpu::GpuScheduler::SetGetBuffer,
 592                  base::Unretained(scheduler_.get())));
 593   command_buffer_->SetParseErrorCallback(
 594       base::Bind(&GpuCommandBufferStub::OnParseError, base::Unretained(this)));
 595   scheduler_->SetSchedulingChangedCallback(
 596       base::Bind(&GpuChannel::StubSchedulingChanged,
 597                  base::Unretained(channel_)));
 598
 599   if (watchdog_) {
 600     scheduler_->SetCommandProcessedCallback(
 601         base::Bind(&GpuCommandBufferStub::OnCommandProcessed,
 602                    base::Unretained(this)));
 603   }
 604
 605   const size_t kSharedStateSize = sizeof(gpu::CommandBufferSharedState);
 606   if (!shared_state_shm->Map(kSharedStateSize)) {
 607     DLOG(ERROR) << "Failed to map shared state buffer.";
 608     OnInitializeFailed(reply_message);
 609     return;
 610   }
 611   command_buffer_->SetSharedStateBuffer(gpu::MakeBackingFromSharedMemory(
 612       shared_state_shm.Pass(), kSharedStateSize));
 613
 614   gpu::Capabilities capabilities = decoder_->GetCapabilities();
 615   capabilities.future_sync_points = channel_->allow_future_sync_points();
 616
 617   GpuCommandBufferMsg_Initialize::WriteReplyParams(
 618       reply_message, true, capabilities);
 619   Send(reply_message);
 620
 621   if (handle_.is_null() && !active_url_.is_empty()) {
 622     GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 623     gpu_channel_manager->Send(new GpuHostMsg_DidCreateOffscreenContext(
 624         active_url_));
 625   }
 626 }
 627
 628 void GpuCommandBufferStub::OnCreateStreamTexture(
 629     uint32 texture_id, int32 stream_id, bool* succeeded) {
 630 #if defined(OS_ANDROID)
 631   *succeeded = StreamTexture::Create(this, texture_id, stream_id);
 632 #else
 633   *succeeded = false;
 634 #endif
 635 }
 636
 637 void GpuCommandBufferStub::SetLatencyInfoCallback(
 638     const LatencyInfoCallback& callback) {
 639   latency_info_callback_ = callback;
 640 }
 641
 642 int32 GpuCommandBufferStub::GetRequestedAttribute(int attr) const {
 643   // The command buffer is pairs of enum, value
 644   // search for the requested attribute, return the value.
 645   for (std::vector<int32>::const_iterator it = requested_attribs_.begin();
 646        it != requested_attribs_.end(); ++it) {
 647     if (*it++ == attr) {
 648       return *it;
 649     }
 650   }
 651   return -1;
 652 }
 653
 654 void GpuCommandBufferStub::OnSetGetBuffer(int32 shm_id,
 655                                           IPC::Message* reply_message) {
 656   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnSetGetBuffer");
 657   if (command_buffer_)
 658     command_buffer_->SetGetBuffer(shm_id);
 659   Send(reply_message);
 660 }
 661
 662 void GpuCommandBufferStub::OnProduceFrontBuffer(const gpu::Mailbox& mailbox) {
 663   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnProduceFrontBuffer");
 664   if (!decoder_) {
 665     LOG(ERROR) << "Can't produce front buffer before initialization.";
 666     return;
 667   }
 668
 669   decoder_->ProduceFrontBuffer(mailbox);
 670 }
 671
 672 void GpuCommandBufferStub::OnParseError() {
 673   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnParseError");
 674   DCHECK(command_buffer_.get());
 675   gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 676   IPC::Message* msg = new GpuCommandBufferMsg_Destroyed(
 677       route_id_, state.context_lost_reason);
 678   msg->set_unblock(true);
 679   Send(msg);
 680
 681   // Tell the browser about this context loss as well, so it can
 682   // determine whether client APIs like WebGL need to be immediately
 683   // blocked from automatically running.
 684   GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
 685   gpu_channel_manager->Send(new GpuHostMsg_DidLoseContext(
 686       handle_.is_null(), state.context_lost_reason, active_url_));
 687
 688   CheckContextLost();
 689 }
 690
 691 void GpuCommandBufferStub::OnWaitForTokenInRange(int32 start,
 692                                                  int32 end,
 693                                                  IPC::Message* reply_message) {
 694   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnWaitForTokenInRange");
 695   DCHECK(command_buffer_.get());
 696   CheckContextLost();
 697   if (wait_for_token_)
 698     LOG(ERROR) << "Got WaitForToken command while currently waiting for token.";
 699   wait_for_token_ =
 700       make_scoped_ptr(new WaitForCommandState(start, end, reply_message));
 701   CheckCompleteWaits();
 702 }
 703
 704 void GpuCommandBufferStub::OnWaitForGetOffsetInRange(
 705     int32 start,
 706     int32 end,
 707     IPC::Message* reply_message) {
 708   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnWaitForGetOffsetInRange");
 709   DCHECK(command_buffer_.get());
 710   CheckContextLost();
 711   if (wait_for_get_offset_) {
 712     LOG(ERROR)
 713         << "Got WaitForGetOffset command while currently waiting for offset.";
 714   }
 715   wait_for_get_offset_ =
 716       make_scoped_ptr(new WaitForCommandState(start, end, reply_message));
 717   CheckCompleteWaits();
 718 }
 719
 720 void GpuCommandBufferStub::CheckCompleteWaits() {
 721   if (wait_for_token_ || wait_for_get_offset_) {
 722     gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 723     if (wait_for_token_ &&
 724         (gpu::CommandBuffer::InRange(
 725              wait_for_token_->start, wait_for_token_->end, state.token) ||
 726          state.error != gpu::error::kNoError)) {
 727       ReportState();
 728       GpuCommandBufferMsg_WaitForTokenInRange::WriteReplyParams(
 729           wait_for_token_->reply.get(), state);
 730       Send(wait_for_token_->reply.release());
 731       wait_for_token_.reset();
 732     }
 733     if (wait_for_get_offset_ &&
 734         (gpu::CommandBuffer::InRange(wait_for_get_offset_->start,
 735                                      wait_for_get_offset_->end,
 736                                      state.get_offset) ||
 737          state.error != gpu::error::kNoError)) {
 738       ReportState();
 739       GpuCommandBufferMsg_WaitForGetOffsetInRange::WriteReplyParams(
 740           wait_for_get_offset_->reply.get(), state);
 741       Send(wait_for_get_offset_->reply.release());
 742       wait_for_get_offset_.reset();
 743     }
 744   }
 745 }
 746
 747 void GpuCommandBufferStub::OnAsyncFlush(
 748     int32 put_offset,
 749     uint32 flush_count,
 750     const std::vector<ui::LatencyInfo>& latency_info) {
 751   TRACE_EVENT1(
 752       "gpu", "GpuCommandBufferStub::OnAsyncFlush", "put_offset", put_offset);
 753
 754   if (ui::LatencyInfo::Verify(latency_info,
 755                               "GpuCommandBufferStub::OnAsyncFlush") &&
 756       !latency_info_callback_.is_null()) {
 757     latency_info_callback_.Run(latency_info);
 758   }
 759   DCHECK(command_buffer_.get());
 760   if (flush_count - last_flush_count_ < 0x8000000U) {
 761     last_flush_count_ = flush_count;
 762     command_buffer_->Flush(put_offset);
 763   } else {
 764     // We received this message out-of-order. This should not happen but is here
 765     // to catch regressions. Ignore the message.
 766     NOTREACHED() << "Received a Flush message out-of-order";
 767   }
 768
 769   ReportState();
 770 }
 771
 772 void GpuCommandBufferStub::OnRescheduled() {
 773   gpu::CommandBuffer::State pre_state = command_buffer_->GetLastState();
 774   command_buffer_->Flush(command_buffer_->GetPutOffset());
 775   gpu::CommandBuffer::State post_state = command_buffer_->GetLastState();
 776
 777   if (pre_state.get_offset != post_state.get_offset)
 778     ReportState();
 779 }
 780
 781 void GpuCommandBufferStub::OnRegisterTransferBuffer(
 782     int32 id,
 783     base::SharedMemoryHandle transfer_buffer,
 784     uint32 size) {
 785   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnRegisterTransferBuffer");
 786
 787   // Take ownership of the memory and map it into this process.
 788   // This validates the size.
 789   scoped_ptr<base::SharedMemory> shared_memory(
 790       new base::SharedMemory(transfer_buffer, false));
 791   if (!shared_memory->Map(size)) {
 792     DVLOG(0) << "Failed to map shared memory.";
 793     return;
 794   }
 795
 796   if (command_buffer_) {
 797     command_buffer_->RegisterTransferBuffer(
 798         id, gpu::MakeBackingFromSharedMemory(shared_memory.Pass(), size));
 799   }
 800 }
 801
 802 void GpuCommandBufferStub::OnDestroyTransferBuffer(int32 id) {
 803   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyTransferBuffer");
 804
 805   if (command_buffer_)
 806     command_buffer_->DestroyTransferBuffer(id);
 807 }
 808
 809 void GpuCommandBufferStub::OnCommandProcessed() {
 810   if (watchdog_)
 811     watchdog_->CheckArmed();
 812 }
 813
 814 void GpuCommandBufferStub::ReportState() { command_buffer_->UpdateState(); }
 815
 816 void GpuCommandBufferStub::PutChanged() {
 817   FastSetActiveURL(active_url_, active_url_hash_);
 818   scheduler_->PutChanged();
 819 }
 820
 821 void GpuCommandBufferStub::OnCreateVideoDecoder(
 822     media::VideoCodecProfile profile,
 823     int32 decoder_route_id,
 824     IPC::Message* reply_message) {
 825   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateVideoDecoder");
 826   GpuVideoDecodeAccelerator* decoder = new GpuVideoDecodeAccelerator(
 827       decoder_route_id, this, channel_->io_message_loop());
 828   decoder->Initialize(profile, reply_message);
 829   // decoder is registered as a DestructionObserver of this stub and will
 830   // self-delete during destruction of this stub.
 831 }
 832
 833 void GpuCommandBufferStub::OnCreateVideoEncoder(
 834     media::VideoFrame::Format input_format,
 835     const gfx::Size& input_visible_size,
 836     media::VideoCodecProfile output_profile,
 837     uint32 initial_bitrate,
 838     int32 encoder_route_id,
 839     IPC::Message* reply_message) {
 840   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateVideoEncoder");
 841   GpuVideoEncodeAccelerator* encoder =
 842       new GpuVideoEncodeAccelerator(encoder_route_id, this);
 843   encoder->Initialize(input_format,
 844                       input_visible_size,
 845                       output_profile,
 846                       initial_bitrate,
 847                       reply_message);
 848   // encoder is registered as a DestructionObserver of this stub and will
 849   // self-delete during destruction of this stub.
 850 }
 851
 852 void GpuCommandBufferStub::OnSetSurfaceVisible(bool visible) {
 853   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnSetSurfaceVisible");
 854   if (memory_manager_client_state_)
 855     memory_manager_client_state_->SetVisible(visible);
 856 }
 857
 858 void GpuCommandBufferStub::AddSyncPoint(uint32 sync_point) {
 859   sync_points_.push_back(sync_point);
 860 }
 861
 862 void GpuCommandBufferStub::OnRetireSyncPoint(uint32 sync_point) {
 863   DCHECK(!sync_points_.empty() && sync_points_.front() == sync_point);
 864   sync_points_.pop_front();
 865   GpuChannelManager* manager = channel_->gpu_channel_manager();
 866   manager->sync_point_manager()->RetireSyncPoint(sync_point);
 867 }
 868
 869 bool GpuCommandBufferStub::OnWaitSyncPoint(uint32 sync_point) {
 870   if (!sync_point)
 871     return true;
 872   GpuChannelManager* manager = channel_->gpu_channel_manager();
 873   if (manager->sync_point_manager()->IsSyncPointRetired(sync_point))
 874     return true;
 875
 876   if (sync_point_wait_count_ == 0) {
 877     TRACE_EVENT_ASYNC_BEGIN1("gpu", "WaitSyncPoint", this,
 878                              "GpuCommandBufferStub", this);
 879   }
 880   scheduler_->SetScheduled(false);
 881   ++sync_point_wait_count_;
 882   manager->sync_point_manager()->AddSyncPointCallback(
 883       sync_point,
 884       base::Bind(&GpuCommandBufferStub::OnSyncPointRetired,
 885                  this->AsWeakPtr()));
 886   return scheduler_->IsScheduled();
 887 }
 888
 889 void GpuCommandBufferStub::OnSyncPointRetired() {
 890   --sync_point_wait_count_;
 891   if (sync_point_wait_count_ == 0) {
 892     TRACE_EVENT_ASYNC_END1("gpu", "WaitSyncPoint", this,
 893                            "GpuCommandBufferStub", this);
 894   }
 895   scheduler_->SetScheduled(true);
 896 }
 897
 898 void GpuCommandBufferStub::OnSignalSyncPoint(uint32 sync_point, uint32 id) {
 899   GpuChannelManager* manager = channel_->gpu_channel_manager();
 900   manager->sync_point_manager()->AddSyncPointCallback(
 901       sync_point,
 902       base::Bind(&GpuCommandBufferStub::OnSignalSyncPointAck,
 903                  this->AsWeakPtr(),
 904                  id));
 905 }
 906
 907 void GpuCommandBufferStub::OnSignalSyncPointAck(uint32 id) {
 908   Send(new GpuCommandBufferMsg_SignalSyncPointAck(route_id_, id));
 909 }
 910
 911 void GpuCommandBufferStub::OnSignalQuery(uint32 query_id, uint32 id) {
 912   if (decoder_) {
 913     gpu::gles2::QueryManager* query_manager = decoder_->GetQueryManager();
 914     if (query_manager) {
 915       gpu::gles2::QueryManager::Query* query =
 916           query_manager->GetQuery(query_id);
 917       if (query) {
 918         query->AddCallback(
 919           base::Bind(&GpuCommandBufferStub::OnSignalSyncPointAck,
 920                      this->AsWeakPtr(),
 921                      id));
 922         return;
 923       }
 924     }
 925   }
 926   // Something went wrong, run callback immediately.
 927   OnSignalSyncPointAck(id);
 928 }
 929
 930
 931 void GpuCommandBufferStub::OnSetClientHasMemoryAllocationChangedCallback(
 932     bool has_callback) {
 933   TRACE_EVENT0(
 934       "gpu",
 935       "GpuCommandBufferStub::OnSetClientHasMemoryAllocationChangedCallback");
 936   if (has_callback) {
 937     if (!memory_manager_client_state_) {
 938       memory_manager_client_state_.reset(GetMemoryManager()->CreateClientState(
 939           this, surface_id_ != 0, true));
 940     }
 941   } else {
 942     memory_manager_client_state_.reset();
 943   }
 944 }
 945
 946 void GpuCommandBufferStub::OnCreateImage(int32 id,
 947                                          gfx::GpuMemoryBufferHandle handle,
 948                                          gfx::Size size,
 949                                          gfx::GpuMemoryBuffer::Format format,
 950                                          uint32 internalformat) {
 951   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateImage");
 952
 953   if (!decoder_)
 954     return;
 955
 956   gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
 957   DCHECK(image_manager);
 958   if (image_manager->LookupImage(id)) {
 959     LOG(ERROR) << "Image already exists with same ID.";
 960     return;
 961   }
 962
 963   scoped_refptr<gfx::GLImage> image = channel()->CreateImageForGpuMemoryBuffer(
 964       handle, size, format, internalformat);
 965   if (!image.get())
 966     return;
 967
 968   image_manager->AddImage(image.get(), id);
 969 }
 970
 971 void GpuCommandBufferStub::OnDestroyImage(int32 id) {
 972   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyImage");
 973
 974   if (!decoder_)
 975     return;
 976
 977   gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
 978   DCHECK(image_manager);
 979   if (!image_manager->LookupImage(id)) {
 980     LOG(ERROR) << "Image with ID doesn't exist.";
 981     return;
 982   }
 983
 984   image_manager->RemoveImage(id);
 985 }
 986
 987 void GpuCommandBufferStub::SendConsoleMessage(
 988     int32 id,
 989     const std::string& message) {
 990   GPUCommandBufferConsoleMessage console_message;
 991   console_message.id = id;
 992   console_message.message = message;
 993   IPC::Message* msg = new GpuCommandBufferMsg_ConsoleMsg(
 994       route_id_, console_message);
 995   msg->set_unblock(true);
 996   Send(msg);
 997 }
 998
 999 void GpuCommandBufferStub::SendCachedShader(
1000     const std::string& key, const std::string& shader) {
1001   channel_->CacheShader(key, shader);
1002 }
1003
1004 void GpuCommandBufferStub::AddDestructionObserver(
1005     DestructionObserver* observer) {
1006   destruction_observers_.AddObserver(observer);
1007 }
1008
1009 void GpuCommandBufferStub::RemoveDestructionObserver(
1010     DestructionObserver* observer) {
1011   destruction_observers_.RemoveObserver(observer);
1012 }
1013
1014 void GpuCommandBufferStub::SetPreemptByFlag(
1015     scoped_refptr<gpu::PreemptionFlag> flag) {
1016   preemption_flag_ = flag;
1017   if (scheduler_)
1018     scheduler_->SetPreemptByFlag(preemption_flag_);
1019 }
1020
1021 bool GpuCommandBufferStub::GetTotalGpuMemory(uint64* bytes) {
1022   *bytes = total_gpu_memory_;
1023   return !!total_gpu_memory_;
1024 }
1025
1026 gfx::Size GpuCommandBufferStub::GetSurfaceSize() const {
1027   if (!surface_.get())
1028     return gfx::Size();
1029   return surface_->GetSize();
1030 }
1031
1032 gpu::gles2::MemoryTracker* GpuCommandBufferStub::GetMemoryTracker() const {
1033   return context_group_->memory_tracker();
1034 }
1035
1036 void GpuCommandBufferStub::SetMemoryAllocation(
1037     const gpu::MemoryAllocation& allocation) {
1038   if (!last_memory_allocation_valid_ ||
1039       !allocation.Equals(last_memory_allocation_)) {
1040     Send(new GpuCommandBufferMsg_SetMemoryAllocation(
1041         route_id_, allocation));
1042   }
1043
1044   last_memory_allocation_valid_ = true;
1045   last_memory_allocation_ = allocation;
1046 }
1047
1048 void GpuCommandBufferStub::SuggestHaveFrontBuffer(
1049     bool suggest_have_frontbuffer) {
1050   // This can be called outside of OnMessageReceived, so the context needs
1051   // to be made current before calling methods on the surface.
1052   if (surface_.get() && MakeCurrent())
1053     surface_->SetFrontbufferAllocation(suggest_have_frontbuffer);
1054 }
1055
1056 bool GpuCommandBufferStub::CheckContextLost() {
1057   DCHECK(command_buffer_);
1058   gpu::CommandBuffer::State state = command_buffer_->GetLastState();
1059   bool was_lost = state.error == gpu::error::kLostContext;
1060   // Lose all other contexts if the reset was triggered by the robustness
1061   // extension instead of being synthetic.
1062   if (was_lost && decoder_ && decoder_->WasContextLostByRobustnessExtension() &&
1063       (gfx::GLContext::LosesAllContextsOnContextLost() ||
1064        use_virtualized_gl_context_))
1065     channel_->LoseAllContexts();
1066   CheckCompleteWaits();
1067   return was_lost;
1068 }
1069
1070 void GpuCommandBufferStub::MarkContextLost() {
1071   if (!command_buffer_ ||
1072       command_buffer_->GetLastState().error == gpu::error::kLostContext)
1073     return;
1074
1075   command_buffer_->SetContextLostReason(gpu::error::kUnknown);
1076   if (decoder_)
1077     decoder_->LoseContext(GL_UNKNOWN_CONTEXT_RESET_ARB);
1078   command_buffer_->SetParseError(gpu::error::kLostContext);
1079 }
1080
1081 uint64 GpuCommandBufferStub::GetMemoryUsage() const {
1082   return GetMemoryManager()->GetClientMemoryUsage(this);
1083 }
1084
1085 void GpuCommandBufferStub::SwapBuffersCompleted(
1086     const std::vector<ui::LatencyInfo>& latency_info) {
1087   Send(new GpuCommandBufferMsg_SwapBuffersCompleted(route_id_, latency_info));
1088 }
1089
1090 }  // namespace content