mojo/gles2/command_buffer_client_impl.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "mojo/gles2/command_buffer_client_impl.h"
   6
   7 #include <limits>
   8
   9 #include "base/logging.h"
  10 #include "base/process/process_handle.h"
  11 #include "components/view_manager/gles2/command_buffer_type_conversions.h"
  12 #include "components/view_manager/gles2/mojo_buffer_backing.h"
  13 #include "components/view_manager/gles2/mojo_gpu_memory_buffer.h"
  14 #include "gpu/command_buffer/service/image_factory.h"
  15 #include "mojo/platform_handle/platform_handle_functions.h"
  16
  17 namespace gles2 {
  18
  19 namespace {
  20
  21 bool CreateMapAndDupSharedBuffer(size_t size,
  22                                  void** memory,
  23                                  mojo::ScopedSharedBufferHandle* handle,
  24                                  mojo::ScopedSharedBufferHandle* duped) {
  25   MojoResult result = mojo::CreateSharedBuffer(NULL, size, handle);
  26   if (result != MOJO_RESULT_OK)
  27     return false;
  28   DCHECK(handle->is_valid());
  29
  30   result = mojo::DuplicateBuffer(handle->get(), NULL, duped);
  31   if (result != MOJO_RESULT_OK)
  32     return false;
  33   DCHECK(duped->is_valid());
  34
  35   result = mojo::MapBuffer(
  36       handle->get(), 0, size, memory, MOJO_MAP_BUFFER_FLAG_NONE);
  37   if (result != MOJO_RESULT_OK)
  38     return false;
  39   DCHECK(*memory);
  40
  41   return true;
  42 }
  43
  44 }  // namespace
  45
  46 CommandBufferDelegate::~CommandBufferDelegate() {}
  47
  48 void CommandBufferDelegate::ContextLost() {}
  49
  50 class CommandBufferClientImpl::SyncClientImpl
  51     : public mojo::CommandBufferSyncClient {
  52  public:
  53   SyncClientImpl(mojo::CommandBufferSyncClientPtr* ptr,
  54                  const MojoAsyncWaiter* async_waiter)
  55       : initialized_successfully_(false), binding_(this, ptr, async_waiter) {}
  56
  57   bool WaitForInitialization() {
  58     if (!binding_.WaitForIncomingMethodCall())
  59       return false;
  60     return initialized_successfully_;
  61   }
  62
  63   mojo::CommandBufferStatePtr WaitForProgress() {
  64     if (!binding_.WaitForIncomingMethodCall())
  65       return mojo::CommandBufferStatePtr();
  66     return command_buffer_state_.Pass();
  67   }
  68
  69   gpu::Capabilities GetCapabilities() {
  70     if (capabilities_)
  71       return capabilities_.To<gpu::Capabilities>();
  72     return gpu::Capabilities();
  73   }
  74
  75  private:
  76   // CommandBufferSyncClient methods:
  77   void DidInitialize(bool success,
  78                      mojo::GpuCapabilitiesPtr capabilities) override {
  79     initialized_successfully_ = success;
  80     capabilities_ = capabilities.Pass();
  81   }
  82   void DidMakeProgress(mojo::CommandBufferStatePtr state) override {
  83     command_buffer_state_ = state.Pass();
  84   }
  85
  86   bool initialized_successfully_;
  87   mojo::GpuCapabilitiesPtr capabilities_;
  88   mojo::CommandBufferStatePtr command_buffer_state_;
  89   mojo::Binding<mojo::CommandBufferSyncClient> binding_;
  90
  91   DISALLOW_COPY_AND_ASSIGN(SyncClientImpl);
  92 };
  93
  94 class CommandBufferClientImpl::SyncPointClientImpl
  95     : public mojo::CommandBufferSyncPointClient {
  96  public:
  97   SyncPointClientImpl(mojo::CommandBufferSyncPointClientPtr* ptr,
  98                       const MojoAsyncWaiter* async_waiter)
  99       : sync_point_(0u), binding_(this, ptr, async_waiter) {}
 100
 101   uint32_t WaitForInsertSyncPoint() {
 102     if (!binding_.WaitForIncomingMethodCall())
 103       return 0u;
 104     uint32_t result = sync_point_;
 105     sync_point_ = 0u;
 106     return result;
 107   }
 108
 109  private:
 110   void DidInsertSyncPoint(uint32_t sync_point) override {
 111     sync_point_ = sync_point;
 112   }
 113
 114   uint32_t sync_point_;
 115
 116   mojo::Binding<mojo::CommandBufferSyncPointClient> binding_;
 117 };
 118
 119 CommandBufferClientImpl::CommandBufferClientImpl(
 120     CommandBufferDelegate* delegate,
 121     const MojoAsyncWaiter* async_waiter,
 122     mojo::ScopedMessagePipeHandle command_buffer_handle)
 123     : delegate_(delegate),
 124       observer_binding_(this),
 125       shared_state_(NULL),
 126       last_put_offset_(-1),
 127       next_transfer_buffer_id_(0),
 128       next_image_id_(0),
 129       async_waiter_(async_waiter) {
 130   command_buffer_.Bind(mojo::InterfacePtrInfo<mojo::CommandBuffer>(
 131                            command_buffer_handle.Pass(), 0u),
 132                        async_waiter);
 133   command_buffer_.set_connection_error_handler(
 134       [this]() { DidLoseContext(gpu::error::kUnknown); });
 135 }
 136
 137 CommandBufferClientImpl::~CommandBufferClientImpl() {}
 138
 139 bool CommandBufferClientImpl::Initialize() {
 140   const size_t kSharedStateSize = sizeof(gpu::CommandBufferSharedState);
 141   void* memory = NULL;
 142   mojo::ScopedSharedBufferHandle duped;
 143   bool result = CreateMapAndDupSharedBuffer(
 144       kSharedStateSize, &memory, &shared_state_handle_, &duped);
 145   if (!result)
 146     return false;
 147
 148   shared_state_ = static_cast<gpu::CommandBufferSharedState*>(memory);
 149
 150   shared_state()->Initialize();
 151
 152   mojo::CommandBufferSyncClientPtr sync_client;
 153   sync_client_impl_.reset(new SyncClientImpl(&sync_client, async_waiter_));
 154
 155   mojo::CommandBufferSyncPointClientPtr sync_point_client;
 156   sync_point_client_impl_.reset(
 157       new SyncPointClientImpl(&sync_point_client, async_waiter_));
 158
 159   mojo::CommandBufferLostContextObserverPtr observer_ptr;
 160   observer_binding_.Bind(GetProxy(&observer_ptr), async_waiter_);
 161   command_buffer_->Initialize(sync_client.Pass(),
 162                               sync_point_client.Pass(),
 163                               observer_ptr.Pass(),
 164                               duped.Pass());
 165
 166   // Wait for DidInitialize to come on the sync client pipe.
 167   if (!sync_client_impl_->WaitForInitialization()) {
 168     VLOG(1) << "Channel encountered error while creating command buffer";
 169     return false;
 170   }
 171   capabilities_ = sync_client_impl_->GetCapabilities();
 172   return true;
 173 }
 174
 175 gpu::CommandBuffer::State CommandBufferClientImpl::GetLastState() {
 176   return last_state_;
 177 }
 178
 179 int32 CommandBufferClientImpl::GetLastToken() {
 180   TryUpdateState();
 181   return last_state_.token;
 182 }
 183
 184 void CommandBufferClientImpl::Flush(int32 put_offset) {
 185   if (last_put_offset_ == put_offset)
 186     return;
 187
 188   last_put_offset_ = put_offset;
 189   command_buffer_->Flush(put_offset);
 190 }
 191
 192 void CommandBufferClientImpl::OrderingBarrier(int32_t put_offset) {
 193   // TODO(jamesr): Implement this more efficiently.
 194   Flush(put_offset);
 195 }
 196
 197 void CommandBufferClientImpl::WaitForTokenInRange(int32 start, int32 end) {
 198   TryUpdateState();
 199   while (!InRange(start, end, last_state_.token) &&
 200          last_state_.error == gpu::error::kNoError) {
 201     MakeProgressAndUpdateState();
 202     TryUpdateState();
 203   }
 204 }
 205
 206 void CommandBufferClientImpl::WaitForGetOffsetInRange(int32 start, int32 end) {
 207   TryUpdateState();
 208   while (!InRange(start, end, last_state_.get_offset) &&
 209          last_state_.error == gpu::error::kNoError) {
 210     MakeProgressAndUpdateState();
 211     TryUpdateState();
 212   }
 213 }
 214
 215 void CommandBufferClientImpl::SetGetBuffer(int32 shm_id) {
 216   command_buffer_->SetGetBuffer(shm_id);
 217   last_put_offset_ = -1;
 218 }
 219
 220 scoped_refptr<gpu::Buffer> CommandBufferClientImpl::CreateTransferBuffer(
 221     size_t size,
 222     int32* id) {
 223   if (size >= std::numeric_limits<uint32_t>::max())
 224     return NULL;
 225
 226   void* memory = NULL;
 227   mojo::ScopedSharedBufferHandle handle;
 228   mojo::ScopedSharedBufferHandle duped;
 229   if (!CreateMapAndDupSharedBuffer(size, &memory, &handle, &duped)) {
 230     if (last_state_.error == gpu::error::kNoError)
 231       last_state_.error = gpu::error::kLostContext;
 232     return NULL;
 233   }
 234
 235   *id = ++next_transfer_buffer_id_;
 236
 237   command_buffer_->RegisterTransferBuffer(
 238       *id, duped.Pass(), static_cast<uint32_t>(size));
 239
 240   scoped_ptr<gpu::BufferBacking> backing(
 241       new MojoBufferBacking(handle.Pass(), memory, size));
 242   scoped_refptr<gpu::Buffer> buffer(new gpu::Buffer(backing.Pass()));
 243   return buffer;
 244 }
 245
 246 void CommandBufferClientImpl::DestroyTransferBuffer(int32 id) {
 247   command_buffer_->DestroyTransferBuffer(id);
 248 }
 249
 250 gpu::Capabilities CommandBufferClientImpl::GetCapabilities() {
 251   return capabilities_;
 252 }
 253
 254 int32_t CommandBufferClientImpl::CreateImage(ClientBuffer buffer,
 255                                              size_t width,
 256                                              size_t height,
 257                                              unsigned internalformat) {
 258   int32 new_id = ++next_image_id_;
 259
 260   mojo::SizePtr size = mojo::Size::New();
 261   size->width = static_cast<int32_t>(width);
 262   size->height = static_cast<int32_t>(height);
 263
 264   MojoGpuMemoryBufferImpl* gpu_memory_buffer =
 265       MojoGpuMemoryBufferImpl::FromClientBuffer(buffer);
 266   gfx::GpuMemoryBufferHandle handle = gpu_memory_buffer->GetHandle();
 267
 268   bool requires_sync_point = false;
 269   base::SharedMemoryHandle dupd_handle =
 270       base::SharedMemory::DuplicateHandle(handle.handle);
 271 #if defined(OS_WIN)
 272   HANDLE platform_handle = dupd_handle;
 273 #else
 274   int platform_handle = dupd_handle.fd;
 275 #endif
 276
 277   if (handle.type != gfx::SHARED_MEMORY_BUFFER) {
 278     requires_sync_point = true;
 279     NOTIMPLEMENTED();
 280     return -1;
 281   }
 282
 283   MojoHandle mojo_handle = MOJO_HANDLE_INVALID;
 284   MojoResult create_result = MojoCreatePlatformHandleWrapper(
 285       platform_handle, &mojo_handle);
 286   if (create_result != MOJO_RESULT_OK) {
 287     NOTIMPLEMENTED();
 288     return -1;
 289   }
 290   mojo::ScopedHandle scoped_handle;
 291   scoped_handle.reset(mojo::Handle(mojo_handle));
 292   command_buffer_->CreateImage(
 293       new_id, scoped_handle.Pass(), handle.type, size.Pass(),
 294       static_cast<int32_t>(gpu_memory_buffer->GetFormat()), internalformat);
 295   if (requires_sync_point) {
 296     NOTIMPLEMENTED();
 297     // TODO(jam): need to support this if we support types other than
 298     // SHARED_MEMORY_BUFFER.
 299     //gpu_memory_buffer_manager->SetDestructionSyncPoint(gpu_memory_buffer,
 300     //                                                   InsertSyncPoint());
 301   }
 302
 303   return new_id;
 304 }
 305
 306 void CommandBufferClientImpl::DestroyImage(int32 id) {
 307   command_buffer_->DestroyImage(id);
 308 }
 309
 310 int32_t CommandBufferClientImpl::CreateGpuMemoryBufferImage(
 311     size_t width,
 312     size_t height,
 313     unsigned internalformat,
 314     unsigned usage) {
 315   scoped_ptr<gfx::GpuMemoryBuffer> buffer(MojoGpuMemoryBufferImpl::Create(
 316       gfx::Size(static_cast<int>(width), static_cast<int>(height)),
 317       gpu::ImageFactory::DefaultBufferFormatForImageFormat(internalformat),
 318       gpu::ImageFactory::ImageUsageToGpuMemoryBufferUsage(usage)));
 319   if (!buffer)
 320     return -1;
 321
 322   return CreateImage(buffer->AsClientBuffer(), width, height, internalformat);
 323 }
 324
 325 uint32_t CommandBufferClientImpl::InsertSyncPoint() {
 326   command_buffer_->InsertSyncPoint(true);
 327   return sync_point_client_impl_->WaitForInsertSyncPoint();
 328 }
 329
 330 uint32_t CommandBufferClientImpl::InsertFutureSyncPoint() {
 331   command_buffer_->InsertSyncPoint(false);
 332   return sync_point_client_impl_->WaitForInsertSyncPoint();
 333 }
 334
 335 void CommandBufferClientImpl::RetireSyncPoint(uint32_t sync_point) {
 336   command_buffer_->RetireSyncPoint(sync_point);
 337 }
 338
 339 void CommandBufferClientImpl::SignalSyncPoint(uint32_t sync_point,
 340                                               const base::Closure& callback) {
 341   // TODO(piman)
 342 }
 343
 344 void CommandBufferClientImpl::SignalQuery(uint32_t query,
 345                                           const base::Closure& callback) {
 346   // TODO(piman)
 347   NOTIMPLEMENTED();
 348 }
 349
 350 void CommandBufferClientImpl::SetSurfaceVisible(bool visible) {
 351   // TODO(piman)
 352   NOTIMPLEMENTED();
 353 }
 354
 355 uint32_t CommandBufferClientImpl::CreateStreamTexture(uint32_t texture_id) {
 356   // TODO(piman)
 357   NOTIMPLEMENTED();
 358   return 0;
 359 }
 360
 361 void CommandBufferClientImpl::DidLoseContext(int32_t lost_reason) {
 362   last_state_.error = gpu::error::kLostContext;
 363   last_state_.context_lost_reason =
 364       static_cast<gpu::error::ContextLostReason>(lost_reason);
 365   delegate_->ContextLost();
 366 }
 367
 368 void CommandBufferClientImpl::TryUpdateState() {
 369   if (last_state_.error == gpu::error::kNoError)
 370     shared_state()->Read(&last_state_);
 371 }
 372
 373 void CommandBufferClientImpl::MakeProgressAndUpdateState() {
 374   command_buffer_->MakeProgress(last_state_.get_offset);
 375
 376   mojo::CommandBufferStatePtr state = sync_client_impl_->WaitForProgress();
 377   if (!state) {
 378     VLOG(1) << "Channel encountered error while waiting for command buffer";
 379     // TODO(piman): is it ok for this to re-enter?
 380     DidLoseContext(gpu::error::kUnknown);
 381     return;
 382   }
 383
 384   if (state->generation - last_state_.generation < 0x80000000U)
 385     last_state_ = state.To<State>();
 386 }
 387
 388 void CommandBufferClientImpl::SetLock(base::Lock* lock) {
 389 }
 390
 391 bool CommandBufferClientImpl::IsGpuChannelLost() {
 392   // This is only possible for out-of-process command buffers.
 393   return false;
 394 }
 395
 396 }  // namespace gles2