Move GLES2, GPU & Surfaces into the ViewManager directory. This does not merge the applications, th…

components/gles2/command_buffer_driver.cc

-// 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 "components/gles2/command_buffer_driver.h"
-
-#include "base/bind.h"
-#include "base/macros.h"
-#include "base/memory/shared_memory.h"
-#include "components/gles2/command_buffer_type_conversions.h"
-#include "components/gles2/mojo_buffer_backing.h"
-#include "gpu/command_buffer/common/constants.h"
-#include "gpu/command_buffer/common/value_state.h"
-#include "gpu/command_buffer/service/command_buffer_service.h"
-#include "gpu/command_buffer/service/context_group.h"
-#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
-#include "gpu/command_buffer/service/gpu_scheduler.h"
-#include "gpu/command_buffer/service/image_manager.h"
-#include "gpu/command_buffer/service/mailbox_manager.h"
-#include "gpu/command_buffer/service/memory_tracking.h"
-#include "gpu/command_buffer/service/sync_point_manager.h"
-#include "gpu/command_buffer/service/valuebuffer_manager.h"
-#include "ui/gfx/vsync_provider.h"
-#include "ui/gl/gl_context.h"
-#include "ui/gl/gl_surface.h"
-
-namespace gles2 {
-
-namespace {
-
-class MemoryTrackerStub : public gpu::gles2::MemoryTracker {
- public:
-  MemoryTrackerStub() {}
-
-  void TrackMemoryAllocatedChange(
-      size_t old_size,
-      size_t new_size,
-      gpu::gles2::MemoryTracker::Pool pool) override {}
-
-  bool EnsureGPUMemoryAvailable(size_t size_needed) override { return true; };
-
- private:
-  ~MemoryTrackerStub() override {}
-
-  DISALLOW_COPY_AND_ASSIGN(MemoryTrackerStub);
-};
-
-}  // anonymous namespace
-
-CommandBufferDriver::Client::~Client() {
-}
-
-CommandBufferDriver::CommandBufferDriver(
-    gfx::GLShareGroup* share_group,
-    gpu::gles2::MailboxManager* mailbox_manager,
-    gpu::SyncPointManager* sync_point_manager)
-    : CommandBufferDriver(gfx::kNullAcceleratedWidget,
-                          share_group,
-                          mailbox_manager,
-                          sync_point_manager,
-                          base::Callback<void(CommandBufferDriver*)>()) {
-}
-
-CommandBufferDriver::CommandBufferDriver(
-    gfx::AcceleratedWidget widget,
-    gfx::GLShareGroup* share_group,
-    gpu::gles2::MailboxManager* mailbox_manager,
-    gpu::SyncPointManager* sync_point_manager,
-    const base::Callback<void(CommandBufferDriver*)>& destruct_callback)
-    : client_(nullptr),
-      widget_(widget),
-      share_group_(share_group),
-      mailbox_manager_(mailbox_manager),
-      sync_point_manager_(sync_point_manager),
-      destruct_callback_(destruct_callback),
-      weak_factory_(this) {
-}
-
-CommandBufferDriver::~CommandBufferDriver() {
-  DestroyDecoder();
-  if (!destruct_callback_.is_null())
-    destruct_callback_.Run(this);
-}
-
-void CommandBufferDriver::Initialize(
-    mojo::CommandBufferSyncClientPtr sync_client,
-    mojo::CommandBufferLostContextObserverPtr loss_observer,
-    mojo::ScopedSharedBufferHandle shared_state) {
-  sync_client_ = sync_client.Pass();
-  loss_observer_ = loss_observer.Pass();
-  bool success = DoInitialize(shared_state.Pass());
-  mojo::GpuCapabilitiesPtr capabilities =
-      success ? mojo::GpuCapabilities::From(decoder_->GetCapabilities())
-              : mojo::GpuCapabilities::New();
-  sync_client_->DidInitialize(success, capabilities.Pass());
-}
-
-bool CommandBufferDriver::DoInitialize(
-    mojo::ScopedSharedBufferHandle shared_state) {
-  if (widget_ == gfx::kNullAcceleratedWidget)
-    surface_ = gfx::GLSurface::CreateOffscreenGLSurface(gfx::Size(1, 1));
-  else {
-    surface_ = gfx::GLSurface::CreateViewGLSurface(widget_);
-    if (auto vsync_provider = surface_->GetVSyncProvider()) {
-      vsync_provider->GetVSyncParameters(
-          base::Bind(&CommandBufferDriver::OnUpdateVSyncParameters,
-                     weak_factory_.GetWeakPtr()));
-    }
-  }
-
-  if (!surface_.get())
-    return false;
-
-  // TODO(piman): virtual contexts, gpu preference.
-  context_ = gfx::GLContext::CreateGLContext(share_group_.get(), surface_.get(),
-                                             gfx::PreferIntegratedGpu);
-  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.
-  bool bind_generates_resource = false;
-  scoped_refptr<gpu::gles2::ContextGroup> context_group =
-      new gpu::gles2::ContextGroup(
-          mailbox_manager_.get(), new MemoryTrackerStub,
-          new gpu::gles2::ShaderTranslatorCache, nullptr, nullptr, nullptr,
-          bind_generates_resource);
-
-  command_buffer_.reset(
-      new gpu::CommandBufferService(context_group->transfer_buffer_manager()));
-  bool result = command_buffer_->Initialize();
-  DCHECK(result);
-
-  decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group.get()));
-  scheduler_.reset(new gpu::GpuScheduler(command_buffer_.get(), decoder_.get(),
-                                         decoder_.get()));
-  decoder_->set_engine(scheduler_.get());
-  decoder_->SetResizeCallback(
-      base::Bind(&CommandBufferDriver::OnResize, base::Unretained(this)));
-  decoder_->SetWaitSyncPointCallback(base::Bind(
-      &CommandBufferDriver::OnWaitSyncPoint, base::Unretained(this)));
-
-  gpu::gles2::DisallowedFeatures disallowed_features;
-
-  // TODO(piman): attributes.
-  std::vector<int32> attrib_vector;
-  if (!decoder_->Initialize(surface_, context_, false /* offscreen */,
-                            gfx::Size(1, 1), disallowed_features,
-                            attrib_vector))
-    return false;
-
-  command_buffer_->SetPutOffsetChangeCallback(base::Bind(
-      &gpu::GpuScheduler::PutChanged, base::Unretained(scheduler_.get())));
-  command_buffer_->SetGetBufferChangeCallback(base::Bind(
-      &gpu::GpuScheduler::SetGetBuffer, base::Unretained(scheduler_.get())));
-  command_buffer_->SetParseErrorCallback(
-      base::Bind(&CommandBufferDriver::OnParseError, base::Unretained(this)));
-
-  // TODO(piman): other callbacks
-
-  const size_t kSize = sizeof(gpu::CommandBufferSharedState);
-  scoped_ptr<gpu::BufferBacking> backing(
-      gles2::MojoBufferBacking::Create(shared_state.Pass(), kSize));
-  if (!backing)
-    return false;
-
-  command_buffer_->SetSharedStateBuffer(backing.Pass());
-  return true;
-}
-
-void CommandBufferDriver::SetGetBuffer(int32_t buffer) {
-  command_buffer_->SetGetBuffer(buffer);
-}
-
-void CommandBufferDriver::Flush(int32_t put_offset) {
-  if (!context_)
-    return;
-  if (!context_->MakeCurrent(surface_.get())) {
-    DLOG(WARNING) << "Context lost";
-    OnContextLost(gpu::error::kUnknown);
-    return;
-  }
-  command_buffer_->Flush(put_offset);
-}
-
-void CommandBufferDriver::DestroyWindow() {
-  DestroyDecoder();
-  surface_ = nullptr;
-  context_ = nullptr;
-  destruct_callback_.Reset();
-}
-
-void CommandBufferDriver::MakeProgress(int32_t last_get_offset) {
-  // TODO(piman): handle out-of-order.
-  sync_client_->DidMakeProgress(
-      mojo::CommandBufferState::From(command_buffer_->GetLastState()));
-}
-
-void CommandBufferDriver::RegisterTransferBuffer(
-    int32_t id,
-    mojo::ScopedSharedBufferHandle transfer_buffer,
-    uint32_t size) {
-  // Take ownership of the memory and map it into this process.
-  // This validates the size.
-  scoped_ptr<gpu::BufferBacking> backing(
-      gles2::MojoBufferBacking::Create(transfer_buffer.Pass(), size));
-  if (!backing) {
-    DVLOG(0) << "Failed to map shared memory.";
-    return;
-  }
-  command_buffer_->RegisterTransferBuffer(id, backing.Pass());
-}
-
-void CommandBufferDriver::DestroyTransferBuffer(int32_t id) {
-  command_buffer_->DestroyTransferBuffer(id);
-}
-
-void CommandBufferDriver::Echo(const mojo::Callback<void()>& callback) {
-  callback.Run();
-}
-
-void CommandBufferDriver::OnParseError() {
-  gpu::CommandBuffer::State state = command_buffer_->GetLastState();
-  OnContextLost(state.context_lost_reason);
-}
-
-void CommandBufferDriver::OnResize(gfx::Size size, float scale_factor) {
-  surface_->Resize(size);
-}
-
-bool CommandBufferDriver::OnWaitSyncPoint(uint32_t sync_point) {
-  if (!sync_point)
-    return true;
-  if (sync_point_manager_->IsSyncPointRetired(sync_point))
-    return true;
-  scheduler_->SetScheduled(false);
-  sync_point_manager_->AddSyncPointCallback(
-      sync_point, base::Bind(&CommandBufferDriver::OnSyncPointRetired,
-                             weak_factory_.GetWeakPtr()));
-  return scheduler_->IsScheduled();
-}
-
-void CommandBufferDriver::OnSyncPointRetired() {
-  scheduler_->SetScheduled(true);
-}
-
-void CommandBufferDriver::OnContextLost(uint32_t reason) {
-  loss_observer_->DidLoseContext(reason);
-  client_->DidLoseContext();
-}
-
-void CommandBufferDriver::OnUpdateVSyncParameters(
-    const base::TimeTicks timebase,
-    const base::TimeDelta interval) {
-  client_->UpdateVSyncParameters(timebase, interval);
-}
-
-void CommandBufferDriver::DestroyDecoder() {
-  if (decoder_) {
-    bool have_context = decoder_->MakeCurrent();
-    decoder_->Destroy(have_context);
-    decoder_.reset();
-  }
-}
-
-}  // namespace gles2