mojo/services/gles2/command_buffer_impl.cc

   1 // Copyright 2013 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/services/gles2/command_buffer_impl.h"
   6
   7 #include "base/bind.h"
   8 #include "base/memory/shared_memory.h"
   9
  10 #include "gpu/command_buffer/common/constants.h"
  11 #include "gpu/command_buffer/service/command_buffer_service.h"
  12 #include "gpu/command_buffer/service/context_group.h"
  13 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
  14 #include "gpu/command_buffer/service/gpu_control_service.h"
  15 #include "gpu/command_buffer/service/gpu_scheduler.h"
  16 #include "gpu/command_buffer/service/image_manager.h"
  17 #include "gpu/command_buffer/service/mailbox_manager.h"
  18 #include "gpu/command_buffer/service/memory_tracking.h"
  19 #include "mojo/public/cpp/bindings/allocation_scope.h"
  20 #include "mojo/services/gles2/command_buffer_type_conversions.h"
  21 #include "mojo/services/gles2/mojo_buffer_backing.h"
  22 #include "ui/gl/gl_context.h"
  23 #include "ui/gl/gl_surface.h"
  24
  25 namespace mojo {
  26 namespace services {
  27
  28 namespace {
  29
  30 class MemoryTrackerStub : public gpu::gles2::MemoryTracker {
  31  public:
  32   MemoryTrackerStub() {}
  33
  34   virtual void TrackMemoryAllocatedChange(size_t old_size,
  35                                           size_t new_size,
  36                                           gpu::gles2::MemoryTracker::Pool pool)
  37       OVERRIDE {}
  38
  39   virtual bool EnsureGPUMemoryAvailable(size_t size_needed) OVERRIDE {
  40     return true;
  41   };
  42
  43  private:
  44   virtual ~MemoryTrackerStub() {}
  45
  46   DISALLOW_COPY_AND_ASSIGN(MemoryTrackerStub);
  47 };
  48
  49 }  // anonymous namespace
  50
  51 CommandBufferImpl::CommandBufferImpl(ScopedCommandBufferClientHandle client,
  52                                      gfx::AcceleratedWidget widget,
  53                                      const gfx::Size& size)
  54     : client_(client.Pass(), this), widget_(widget), size_(size) {}
  55
  56 CommandBufferImpl::~CommandBufferImpl() { client_->DidDestroy(); }
  57
  58 void CommandBufferImpl::Initialize(
  59     ScopedCommandBufferSyncClientHandle sync_client,
  60     mojo::ScopedSharedBufferHandle shared_state) {
  61   sync_client_.reset(sync_client.Pass(), NULL);
  62   sync_client_->DidInitialize(DoInitialize(shared_state.Pass()));
  63 }
  64
  65 bool CommandBufferImpl::DoInitialize(
  66     mojo::ScopedSharedBufferHandle shared_state) {
  67   // TODO(piman): offscreen surface.
  68   scoped_refptr<gfx::GLSurface> surface =
  69       gfx::GLSurface::CreateViewGLSurface(widget_);
  70   if (!surface.get())
  71     return false;
  72
  73   // TODO(piman): context sharing, virtual contexts, gpu preference.
  74   scoped_refptr<gfx::GLContext> context = gfx::GLContext::CreateGLContext(
  75       NULL, surface.get(), gfx::PreferIntegratedGpu);
  76   if (!context.get())
  77     return false;
  78
  79   if (!context->MakeCurrent(surface.get()))
  80     return false;
  81
  82   // TODO(piman): ShaderTranslatorCache is currently per-ContextGroup but
  83   // only needs to be per-thread.
  84   scoped_refptr<gpu::gles2::ContextGroup> context_group =
  85       new gpu::gles2::ContextGroup(NULL,
  86                                    NULL,
  87                                    new MemoryTrackerStub,
  88                                    new gpu::gles2::ShaderTranslatorCache,
  89                                    NULL,
  90                                    true);
  91
  92   command_buffer_.reset(
  93       new gpu::CommandBufferService(context_group->transfer_buffer_manager()));
  94   bool result = command_buffer_->Initialize();
  95   DCHECK(result);
  96
  97   decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group.get()));
  98   scheduler_.reset(new gpu::GpuScheduler(
  99       command_buffer_.get(), decoder_.get(), decoder_.get()));
 100   decoder_->set_engine(scheduler_.get());
 101
 102   gpu::gles2::DisallowedFeatures disallowed_features;
 103
 104   // TODO(piman): attributes.
 105   std::vector<int32> attrib_vector;
 106   if (!decoder_->Initialize(surface,
 107                             context,
 108                             false /* offscreen */,
 109                             size_,
 110                             disallowed_features,
 111                             attrib_vector))
 112     return false;
 113
 114   gpu_control_.reset(
 115       new gpu::GpuControlService(context_group->image_manager(), NULL));
 116
 117   command_buffer_->SetPutOffsetChangeCallback(base::Bind(
 118       &gpu::GpuScheduler::PutChanged, base::Unretained(scheduler_.get())));
 119   command_buffer_->SetGetBufferChangeCallback(base::Bind(
 120       &gpu::GpuScheduler::SetGetBuffer, base::Unretained(scheduler_.get())));
 121   command_buffer_->SetParseErrorCallback(
 122       base::Bind(&CommandBufferImpl::OnParseError, base::Unretained(this)));
 123
 124   // TODO(piman): other callbacks
 125
 126   const size_t kSize = sizeof(gpu::CommandBufferSharedState);
 127   scoped_ptr<gpu::BufferBacking> backing(
 128       gles2::MojoBufferBacking::Create(shared_state.Pass(), kSize));
 129   if (!backing.get())
 130     return false;
 131
 132   command_buffer_->SetSharedStateBuffer(backing.Pass());
 133   return true;
 134 }
 135
 136 void CommandBufferImpl::SetGetBuffer(int32_t buffer) {
 137   command_buffer_->SetGetBuffer(buffer);
 138 }
 139
 140 void CommandBufferImpl::Flush(int32_t put_offset) {
 141   command_buffer_->Flush(put_offset);
 142 }
 143
 144 void CommandBufferImpl::MakeProgress(int32_t last_get_offset) {
 145   // TODO(piman): handle out-of-order.
 146   AllocationScope scope;
 147   sync_client_->DidMakeProgress(command_buffer_->GetLastState());
 148 }
 149
 150 void CommandBufferImpl::RegisterTransferBuffer(
 151     int32_t id,
 152     mojo::ScopedSharedBufferHandle transfer_buffer,
 153     uint32_t size) {
 154   // Take ownership of the memory and map it into this process.
 155   // This validates the size.
 156   scoped_ptr<gpu::BufferBacking> backing(
 157       gles2::MojoBufferBacking::Create(transfer_buffer.Pass(), size));
 158   if (!backing.get()) {
 159     DVLOG(0) << "Failed to map shared memory.";
 160     return;
 161   }
 162   command_buffer_->RegisterTransferBuffer(id, backing.Pass());
 163 }
 164
 165 void CommandBufferImpl::DestroyTransferBuffer(int32_t id) {
 166   command_buffer_->DestroyTransferBuffer(id);
 167 }
 168
 169 void CommandBufferImpl::Echo(const Callback<void()>& callback) {
 170   callback.Run();
 171 }
 172
 173 void CommandBufferImpl::RequestAnimationFrames() {
 174   timer_.Start(FROM_HERE,
 175                base::TimeDelta::FromMilliseconds(16),
 176                this,
 177                &CommandBufferImpl::DrawAnimationFrame);
 178 }
 179
 180 void CommandBufferImpl::CancelAnimationFrames() { timer_.Stop(); }
 181
 182 void CommandBufferImpl::OnParseError() {
 183   gpu::CommandBuffer::State state = command_buffer_->GetLastState();
 184   client_->LostContext(state.context_lost_reason);
 185 }
 186
 187 void CommandBufferImpl::DrawAnimationFrame() { client_->DrawAnimationFrame(); }
 188
 189 }  // namespace services
 190 }  // namespace mojo