services/ui: Revert CLs that broke Windows.

services/ui/gles2/command_buffer_driver.cc

Index: services/ui/gles2/command_buffer_driver.cc
diff --git a/services/ui/gles2/command_buffer_driver.cc b/services/ui/gles2/command_buffer_driver.cc
new file mode 100644
index 0000000000000000000000000000000000000000..559439690fbb02ee0934866c9b80a97e1ce876c2
--- /dev/null
+++ b/services/ui/gles2/command_buffer_driver.cc
@@ -0,0 +1,568 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "services/ui/gles2/command_buffer_driver.h"
+
+#include <stddef.h>
+#include <utility>
+
+#include "base/bind.h"
+#include "base/memory/shared_memory.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "build/build_config.h"
+#include "gpu/command_buffer/common/gpu_memory_buffer_support.h"
+#include "gpu/command_buffer/service/command_buffer_service.h"
+#include "gpu/command_buffer/service/command_executor.h"
+#include "gpu/command_buffer/service/context_group.h"
+#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
+#include "gpu/command_buffer/service/image_manager.h"
+#include "gpu/command_buffer/service/mailbox_manager.h"
+#include "gpu/command_buffer/service/query_manager.h"
+#include "gpu/command_buffer/service/sync_point_manager.h"
+#include "gpu/command_buffer/service/transfer_buffer_manager.h"
+#include "mojo/public/cpp/system/platform_handle.h"
+#include "services/ui/common/mojo_buffer_backing.h"
+#include "services/ui/gles2/gl_surface_adapter.h"
+#include "services/ui/gles2/gpu_memory_tracker.h"
+#include "services/ui/gles2/gpu_state.h"
+#include "ui/gfx/buffer_format_util.h"
+#include "ui/gfx/gpu_memory_buffer.h"
+#include "ui/gfx/vsync_provider.h"
+#include "ui/gl/gl_context.h"
+#include "ui/gl/gl_image_shared_memory.h"
+#include "ui/gl/gl_surface.h"
+#include "ui/gl/init/gl_factory.h"
+
+#if defined(USE_OZONE)
+#include "ui/ozone/gl/gl_image_ozone_native_pixmap.h"
+#endif
+
+namespace ui {
+
+namespace {
+
+// The first time polling a fence, delay some extra time to allow other
+// stubs to process some work, or else the timing of the fences could
+// allow a pattern of alternating fast and slow frames to occur.
+const int64_t kHandleMoreWorkPeriodMs = 2;
+const int64_t kHandleMoreWorkPeriodBusyMs = 1;
+
+// Prevents idle work from being starved.
+const int64_t kMaxTimeSinceIdleMs = 10;
+
+}  // namespace
+
+CommandBufferDriver::Client::~Client() {}
+
+CommandBufferDriver::CommandBufferDriver(
+    gpu::CommandBufferNamespace command_buffer_namespace,
+    gpu::CommandBufferId command_buffer_id,
+    gfx::AcceleratedWidget widget,
+    scoped_refptr<GpuState> gpu_state)
+    : command_buffer_namespace_(command_buffer_namespace),
+      command_buffer_id_(command_buffer_id),
+      widget_(widget),
+      client_(nullptr),
+      gpu_state_(gpu_state),
+      previous_processed_num_(0),
+      weak_factory_(this) {
+  DCHECK_EQ(base::ThreadTaskRunnerHandle::Get(),
+            gpu_state_->command_buffer_task_runner()->task_runner());
+}
+
+CommandBufferDriver::~CommandBufferDriver() {
+  DCHECK(CalledOnValidThread());
+  DestroyDecoder();
+}
+
+bool CommandBufferDriver::Initialize(
+    mojo::ScopedSharedBufferHandle shared_state,
+    mojo::Array<int32_t> attribs) {
+  DCHECK(CalledOnValidThread());
+  gpu::gles2::ContextCreationAttribHelper attrib_helper;
+  if (!attrib_helper.Parse(attribs.storage()))
+    return false;
+  // TODO(piman): attribs can't currently represent gpu_preference.
+
+  const bool offscreen = widget_ == gfx::kNullAcceleratedWidget;
+  if (offscreen) {
+    surface_ = gl::init::CreateOffscreenGLSurface(gfx::Size(0, 0));
+  } else {
+#if defined(USE_OZONE)
+    scoped_refptr<gl::GLSurface> underlying_surface =
+        gl::init::CreateSurfacelessViewGLSurface(widget_);
+    if (!underlying_surface)
+      underlying_surface = gl::init::CreateViewGLSurface(widget_);
+#else
+    scoped_refptr<gl::GLSurface> underlying_surface =
+        gl::init::CreateViewGLSurface(widget_);
+#endif
+    scoped_refptr<GLSurfaceAdapterMus> surface_adapter =
+        new GLSurfaceAdapterMus(underlying_surface);
+    surface_adapter->SetGpuCompletedSwapBuffersCallback(
+        base::Bind(&CommandBufferDriver::OnGpuCompletedSwapBuffers,
+                   weak_factory_.GetWeakPtr()));
+    surface_ = surface_adapter;
+
+    gfx::VSyncProvider* vsync_provider =
+        surface_ ? surface_->GetVSyncProvider() : nullptr;
+    if (vsync_provider) {
+      vsync_provider->GetVSyncParameters(
+          base::Bind(&CommandBufferDriver::OnUpdateVSyncParameters,
+                     weak_factory_.GetWeakPtr()));
+    }
+  }
+
+  if (!surface_.get())
+    return false;
+
+  // TODO(piman): virtual contexts.
+  context_ = gl::init::CreateGLContext(
+      gpu_state_->share_group(), surface_.get(), attrib_helper.gpu_preference);
+  if (!context_.get())
+    return false;
+
+  if (!context_->MakeCurrent(surface_.get()))
+    return false;
+
+  // TODO(piman): ShaderTranslatorCache is currently per-ContextGroup but
+  // only needs to be per-thread.
+  const bool bind_generates_resource = attrib_helper.bind_generates_resource;
+  scoped_refptr<gpu::gles2::FeatureInfo> feature_info =
+      new gpu::gles2::FeatureInfo(gpu_state_->gpu_driver_bug_workarounds());
+  // TODO(erikchen): The ContextGroup needs a reference to the
+  // GpuMemoryBufferManager.
+  scoped_refptr<gpu::gles2::ContextGroup> context_group =
+      new gpu::gles2::ContextGroup(
+          gpu_state_->gpu_preferences(), gpu_state_->mailbox_manager(),
+          new GpuMemoryTracker,
+          new gpu::gles2::ShaderTranslatorCache(gpu_state_->gpu_preferences()),
+          new gpu::gles2::FramebufferCompletenessCache, feature_info,
+          bind_generates_resource, nullptr);
+
+  command_buffer_.reset(
+      new gpu::CommandBufferService(context_group->transfer_buffer_manager()));
+
+  decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group.get()));
+  executor_.reset(new gpu::CommandExecutor(command_buffer_.get(),
+                                           decoder_.get(), decoder_.get()));
+  sync_point_order_data_ = gpu::SyncPointOrderData::Create();
+  sync_point_client_ = gpu_state_->sync_point_manager()->CreateSyncPointClient(
+      sync_point_order_data_, GetNamespaceID(), command_buffer_id_);
+  decoder_->set_engine(executor_.get());
+  decoder_->SetFenceSyncReleaseCallback(base::Bind(
+      &CommandBufferDriver::OnFenceSyncRelease, base::Unretained(this)));
+  decoder_->SetWaitFenceSyncCallback(base::Bind(
+      &CommandBufferDriver::OnWaitFenceSync, base::Unretained(this)));
+  decoder_->SetDescheduleUntilFinishedCallback(base::Bind(
+      &CommandBufferDriver::OnDescheduleUntilFinished, base::Unretained(this)));
+  decoder_->SetRescheduleAfterFinishedCallback(base::Bind(
+      &CommandBufferDriver::OnRescheduleAfterFinished, base::Unretained(this)));
+
+  gpu::gles2::DisallowedFeatures disallowed_features;
+
+  if (!decoder_->Initialize(surface_, context_, offscreen, disallowed_features,
+                            attrib_helper))
+    return false;
+
+  command_buffer_->SetPutOffsetChangeCallback(base::Bind(
+      &gpu::CommandExecutor::PutChanged, base::Unretained(executor_.get())));
+  command_buffer_->SetGetBufferChangeCallback(base::Bind(
+      &gpu::CommandExecutor::SetGetBuffer, base::Unretained(executor_.get())));
+  command_buffer_->SetParseErrorCallback(
+      base::Bind(&CommandBufferDriver::OnParseError, base::Unretained(this)));
+
+  // TODO(piman): other callbacks
+
+  const size_t kSize = sizeof(gpu::CommandBufferSharedState);
+  std::unique_ptr<gpu::BufferBacking> backing(
+      MojoBufferBacking::Create(std::move(shared_state), kSize));
+  if (!backing)
+    return false;
+
+  command_buffer_->SetSharedStateBuffer(std::move(backing));
+  gpu_state_->driver_manager()->AddDriver(this);
+  return true;
+}
+
+void CommandBufferDriver::SetGetBuffer(int32_t buffer) {
+  DCHECK(CalledOnValidThread());
+  command_buffer_->SetGetBuffer(buffer);
+}
+
+void CommandBufferDriver::Flush(int32_t put_offset) {
+  DCHECK(CalledOnValidThread());
+  if (!MakeCurrent())
+    return;
+
+  command_buffer_->Flush(put_offset);
+  ProcessPendingAndIdleWork();
+}
+
+void CommandBufferDriver::RegisterTransferBuffer(
+    int32_t id,
+    mojo::ScopedSharedBufferHandle transfer_buffer,
+    uint32_t size) {
+  DCHECK(CalledOnValidThread());
+  // Take ownership of the memory and map it into this process.
+  // This validates the size.
+  std::unique_ptr<gpu::BufferBacking> backing(
+      MojoBufferBacking::Create(std::move(transfer_buffer), size));
+  if (!backing) {
+    DVLOG(0) << "Failed to map shared memory.";
+    return;
+  }
+  command_buffer_->RegisterTransferBuffer(id, std::move(backing));
+}
+
+void CommandBufferDriver::DestroyTransferBuffer(int32_t id) {
+  DCHECK(CalledOnValidThread());
+  command_buffer_->DestroyTransferBuffer(id);
+}
+
+void CommandBufferDriver::CreateImage(int32_t id,
+                                      mojo::ScopedHandle memory_handle,
+                                      int32_t type,
+                                      const gfx::Size& size,
+                                      int32_t format,
+                                      int32_t internal_format) {
+  DCHECK(CalledOnValidThread());
+  if (!MakeCurrent())
+    return;
+
+  gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
+  if (image_manager->LookupImage(id)) {
+    LOG(ERROR) << "Image already exists with same ID.";
+    return;
+  }
+
+  gfx::BufferFormat gpu_format = static_cast<gfx::BufferFormat>(format);
+  if (!gpu::IsGpuMemoryBufferFormatSupported(gpu_format,
+                                             decoder_->GetCapabilities())) {
+    LOG(ERROR) << "Format is not supported.";
+    return;
+  }
+
+  if (!gpu::IsImageSizeValidForGpuMemoryBufferFormat(size, gpu_format)) {
+    LOG(ERROR) << "Invalid image size for format.";
+    return;
+  }
+
+  if (!gpu::IsImageFormatCompatibleWithGpuMemoryBufferFormat(internal_format,
+                                                             gpu_format)) {
+    LOG(ERROR) << "Incompatible image format.";
+    return;
+  }
+
+  if (type != gfx::SHARED_MEMORY_BUFFER) {
+    NOTIMPLEMENTED();
+    return;
+  }
+
+  base::PlatformFile platform_file;
+  MojoResult unwrap_result = mojo::UnwrapPlatformFile(std::move(memory_handle),
+                                                      &platform_file);
+  if (unwrap_result != MOJO_RESULT_OK) {
+    NOTREACHED();
+    return;
+  }
+
+#if defined(OS_WIN)
+  base::SharedMemoryHandle handle(platform_file, base::GetCurrentProcId());
+#else
+  base::FileDescriptor handle(platform_file, false);
+#endif
+
+  scoped_refptr<gl::GLImageSharedMemory> image =
+      new gl::GLImageSharedMemory(size, internal_format);
+  // TODO(jam): also need a mojo enum for this enum
+  if (!image->Initialize(
+          handle, gfx::GpuMemoryBufferId(id), gpu_format, 0,
+          gfx::RowSizeForBufferFormat(size.width(), gpu_format, 0))) {
+    NOTREACHED();
+    return;
+  }
+
+  image_manager->AddImage(image.get(), id);
+}
+
+// TODO(rjkroege): It is conceivable that this code belongs in
+// ozone_gpu_memory_buffer.cc
+void CommandBufferDriver::CreateImageNativeOzone(int32_t id,
+                                                 int32_t type,
+                                                 gfx::Size size,
+                                                 gfx::BufferFormat format,
+                                                 uint32_t internal_format,
+                                                 ui::NativePixmap* pixmap) {
+#if defined(USE_OZONE)
+  gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
+  if (image_manager->LookupImage(id)) {
+    LOG(ERROR) << "Image already exists with same ID.";
+    return;
+  }
+
+  scoped_refptr<ui::GLImageOzoneNativePixmap> image =
+      new ui::GLImageOzoneNativePixmap(size, internal_format);
+  if (!image->Initialize(pixmap, format)) {
+    NOTREACHED();
+    return;
+  }
+
+  image_manager->AddImage(image.get(), id);
+#endif
+}
+
+void CommandBufferDriver::DestroyImage(int32_t id) {
+  DCHECK(CalledOnValidThread());
+  gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
+  if (!image_manager->LookupImage(id)) {
+    LOG(ERROR) << "Image with ID doesn't exist.";
+    return;
+  }
+  if (!MakeCurrent())
+    return;
+  image_manager->RemoveImage(id);
+}
+
+bool CommandBufferDriver::IsScheduled() const {
+  DCHECK(CalledOnValidThread());
+  DCHECK(executor_);
+  return executor_->scheduled();
+}
+
+bool CommandBufferDriver::HasUnprocessedCommands() const {
+  DCHECK(CalledOnValidThread());
+  if (command_buffer_) {
+    gpu::CommandBuffer::State state = GetLastState();
+    return command_buffer_->GetPutOffset() != state.get_offset &&
+        !gpu::error::IsError(state.error);
+  }
+  return false;
+}
+
+gpu::Capabilities CommandBufferDriver::GetCapabilities() const {
+  DCHECK(CalledOnValidThread());
+  return decoder_->GetCapabilities();
+}
+
+gpu::CommandBuffer::State CommandBufferDriver::GetLastState() const {
+  DCHECK(CalledOnValidThread());
+  return command_buffer_->GetLastState();
+}
+
+uint32_t CommandBufferDriver::GetUnprocessedOrderNum() const {
+  DCHECK(CalledOnValidThread());
+  return sync_point_order_data_->unprocessed_order_num();
+}
+
+uint32_t CommandBufferDriver::GetProcessedOrderNum() const {
+  DCHECK(CalledOnValidThread());
+  return sync_point_order_data_->processed_order_num();
+}
+
+bool CommandBufferDriver::MakeCurrent() {
+  DCHECK(CalledOnValidThread());
+  if (!decoder_)
+    return false;
+  if (decoder_->MakeCurrent())
+    return true;
+  DLOG(ERROR) << "Context lost because MakeCurrent failed.";
+  gpu::error::ContextLostReason reason =
+      static_cast<gpu::error::ContextLostReason>(
+          decoder_->GetContextLostReason());
+  command_buffer_->SetContextLostReason(reason);
+  command_buffer_->SetParseError(gpu::error::kLostContext);
+  OnContextLost(reason);
+  return false;
+}
+
+void CommandBufferDriver::ProcessPendingAndIdleWork() {
+  DCHECK(CalledOnValidThread());
+  executor_->ProcessPendingQueries();
+  ScheduleDelayedWork(
+      base::TimeDelta::FromMilliseconds(kHandleMoreWorkPeriodMs));
+}
+
+void CommandBufferDriver::ScheduleDelayedWork(base::TimeDelta delay) {
+  DCHECK(CalledOnValidThread());
+  const bool has_more_work =
+      executor_->HasPendingQueries() || executor_->HasMoreIdleWork();
+  if (!has_more_work) {
+    last_idle_time_ = base::TimeTicks();
+    return;
+  }
+
+  const base::TimeTicks current_time = base::TimeTicks::Now();
+  // |process_delayed_work_time_| is set if processing of delayed work is
+  // already scheduled. Just update the time if already scheduled.
+  if (!process_delayed_work_time_.is_null()) {
+    process_delayed_work_time_ = current_time + delay;
+    return;
+  }
+
+  // Idle when no messages are processed between now and when PollWork is
+  // called.
+  previous_processed_num_ =
+      gpu_state_->driver_manager()->GetProcessedOrderNum();
+
+  if (last_idle_time_.is_null())
+    last_idle_time_ = current_time;
+
+    // scheduled() returns true after passing all unschedule fences and this is
+    // when we can start performing idle work. Idle work is done synchronously
+    // so we can set delay to 0 and instead poll for more work at the rate idle
+    // work is performed. This also ensures that idle work is done as
+    // efficiently as possible without any unnecessary delays.
+  if (executor_->scheduled() && executor_->HasMoreIdleWork())
+    delay = base::TimeDelta();
+
+  process_delayed_work_time_ = current_time + delay;
+  gpu_state_->command_buffer_task_runner()->task_runner()->PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&CommandBufferDriver::PollWork, weak_factory_.GetWeakPtr()),
+      delay);
+}
+
+void CommandBufferDriver::PollWork() {
+  DCHECK(CalledOnValidThread());
+  // Post another delayed task if we have not yet reached the time at which
+  // we should process delayed work.
+  base::TimeTicks current_time = base::TimeTicks::Now();
+  DCHECK(!process_delayed_work_time_.is_null());
+  if (process_delayed_work_time_ > current_time) {
+    gpu_state_->command_buffer_task_runner()->task_runner()->PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&CommandBufferDriver::PollWork, weak_factory_.GetWeakPtr()),
+      process_delayed_work_time_ - current_time);
+    return;
+  }
+  process_delayed_work_time_ = base::TimeTicks();
+  PerformWork();
+}
+
+void CommandBufferDriver::PerformWork() {
+  DCHECK(CalledOnValidThread());
+  if (!MakeCurrent())
+    return;
+
+  if (executor_) {
+    const uint32_t current_unprocessed_num =
+        gpu_state_->driver_manager()->GetUnprocessedOrderNum();
+    // We're idle when no messages were processed or scheduled.
+    bool is_idle = (previous_processed_num_ == current_unprocessed_num);
+    if (!is_idle && !last_idle_time_.is_null()) {
+      base::TimeDelta time_since_idle =
+          base::TimeTicks::Now() - last_idle_time_;
+      base::TimeDelta max_time_since_idle =
+          base::TimeDelta::FromMilliseconds(kMaxTimeSinceIdleMs);
+      // Force idle when it's been too long since last time we were idle.
+      if (time_since_idle > max_time_since_idle)
+        is_idle = true;
+    }
+
+    if (is_idle) {
+      last_idle_time_ = base::TimeTicks::Now();
+      executor_->PerformIdleWork();
+    }
+    executor_->ProcessPendingQueries();
+  }
+
+  ScheduleDelayedWork(
+      base::TimeDelta::FromMilliseconds(kHandleMoreWorkPeriodBusyMs));
+}
+
+void CommandBufferDriver::DestroyDecoder() {
+  DCHECK(CalledOnValidThread());
+  if (decoder_) {
+    gpu_state_->driver_manager()->RemoveDriver(this);
+    bool have_context = decoder_->MakeCurrent();
+    decoder_->Destroy(have_context);
+    decoder_.reset();
+  }
+}
+
+void CommandBufferDriver::OnUpdateVSyncParameters(
+    const base::TimeTicks timebase,
+    const base::TimeDelta interval) {
+  DCHECK(CalledOnValidThread());
+  if (client_)
+    client_->UpdateVSyncParameters(timebase, interval);
+}
+
+void CommandBufferDriver::OnFenceSyncRelease(uint64_t release) {
+  DCHECK(CalledOnValidThread());
+  if (!sync_point_client_->client_state()->IsFenceSyncReleased(release))
+    sync_point_client_->ReleaseFenceSync(release);
+}
+
+bool CommandBufferDriver::OnWaitFenceSync(
+    gpu::CommandBufferNamespace namespace_id,
+    gpu::CommandBufferId command_buffer_id,
+    uint64_t release) {
+  DCHECK(CalledOnValidThread());
+  DCHECK(IsScheduled());
+  gpu::SyncPointManager* sync_point_manager = gpu_state_->sync_point_manager();
+  DCHECK(sync_point_manager);
+
+  scoped_refptr<gpu::SyncPointClientState> release_state =
+      sync_point_manager->GetSyncPointClientState(namespace_id,
+                                                  command_buffer_id);
+
+  if (!release_state)
+    return true;
+
+  executor_->SetScheduled(false);
+  sync_point_client_->Wait(release_state.get(), release,
+                           base::Bind(&gpu::CommandExecutor::SetScheduled,
+                                      executor_->AsWeakPtr(), true));
+  return executor_->scheduled();
+}
+
+void CommandBufferDriver::OnDescheduleUntilFinished() {
+  DCHECK(CalledOnValidThread());
+  DCHECK(IsScheduled());
+  DCHECK(executor_->HasMoreIdleWork());
+
+  executor_->SetScheduled(false);
+}
+
+void CommandBufferDriver::OnRescheduleAfterFinished() {
+  DCHECK(CalledOnValidThread());
+  DCHECK(!executor_->scheduled());
+
+  executor_->SetScheduled(true);
+}
+
+void CommandBufferDriver::OnParseError() {
+  DCHECK(CalledOnValidThread());
+  gpu::CommandBuffer::State state = GetLastState();
+  OnContextLost(state.context_lost_reason);
+}
+
+void CommandBufferDriver::OnContextLost(uint32_t reason) {
+  DCHECK(CalledOnValidThread());
+  if (client_)
+    client_->DidLoseContext(reason);
+}
+
+void CommandBufferDriver::SignalQuery(uint32_t query_id,
+                                      const base::Closure& callback) {
+  DCHECK(CalledOnValidThread());
+
+  gpu::gles2::QueryManager* query_manager = decoder_->GetQueryManager();
+  gpu::gles2::QueryManager::Query* query = query_manager->GetQuery(query_id);
+  if (query)
+    query->AddCallback(callback);
+  else
+    callback.Run();
+}
+
+void CommandBufferDriver::OnGpuCompletedSwapBuffers(gfx::SwapResult result) {
+  DCHECK(CalledOnValidThread());
+  if (client_) {
+    client_->OnGpuCompletedSwapBuffers(result);
+  }
+}
+
+}  // namespace ui