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components/view_manager/gles2/command_buffer_local.cc

+// Copyright 2015 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/view_manager/gles2/command_buffer_local.h"
+
+#include "base/bind.h"
+#include "components/view_manager/gles2/command_buffer_local_client.h"
+#include "components/view_manager/gles2/gpu_memory_tracker.h"
+#include "components/view_manager/gles2/mojo_gpu_memory_buffer.h"
+#include "gpu/command_buffer/service/command_buffer_service.h"
+#include "gpu/command_buffer/service/context_group.h"
+#include "gpu/command_buffer/service/gpu_scheduler.h"
+#include "gpu/command_buffer/service/image_factory.h"
+#include "gpu/command_buffer/service/image_manager.h"
+#include "gpu/command_buffer/service/memory_tracking.h"
+#include "gpu/command_buffer/service/shader_translator_cache.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_image_memory.h"
+#include "ui/gl/gl_surface.h"
+
+namespace gles2 {
+
+const unsigned int GL_MAP_CHROMIUM = 0x78F1;
+
+CommandBufferLocal::CommandBufferLocal(
+    CommandBufferLocalClient* client,
+    gfx::AcceleratedWidget widget,
+    const scoped_refptr<gles2::GpuState>& gpu_state)
+    : widget_(widget),
+      gpu_state_(gpu_state),
+      client_(client),
+      weak_factory_(this) {
+}
+
+CommandBufferLocal::~CommandBufferLocal() {
+  command_buffer_.reset();
+  if (decoder_.get()) {
+    bool have_context = decoder_->GetGLContext()->MakeCurrent(surface_.get());
+    decoder_->Destroy(have_context);
+    decoder_.reset();
+  }
+}
+
+bool CommandBufferLocal::Initialize() {
+  if (widget_ == gfx::kNullAcceleratedWidget) {
+    surface_ = gfx::GLSurface::CreateOffscreenGLSurface(gfx::Size(1, 1));
+  } else {
+    surface_ = gfx::GLSurface::CreateViewGLSurface(widget_);
+    gfx::VSyncProvider* vsync_provider =
+        surface_ ? surface_->GetVSyncProvider() : nullptr;
+    if (vsync_provider) {
+      vsync_provider->GetVSyncParameters(
+          base::Bind(&CommandBufferLocal::OnUpdateVSyncParameters,
+                     weak_factory_.GetWeakPtr()));
+    }
+  }
+
+  if (!surface_.get())
+    return false;
+
+  // TODO(piman): virtual contexts, gpu preference.
+  context_ = gfx::GLContext::CreateGLContext(
+      gpu_state_->share_group(), 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(
+          gpu_state_->mailbox_manager(), new gles2::GpuMemoryTracker,
+          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(&CommandBufferLocal::OnResize, base::Unretained(this)));
+  decoder_->SetWaitSyncPointCallback(base::Bind(
+      &CommandBufferLocal::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(
+      &CommandBufferLocal::PumpCommands, base::Unretained(this)));
+  command_buffer_->SetGetBufferChangeCallback(base::Bind(
+      &gpu::GpuScheduler::SetGetBuffer, base::Unretained(scheduler_.get())));
+  command_buffer_->SetParseErrorCallback(
+      base::Bind(&CommandBufferLocal::OnParseError, base::Unretained(this)));
+  return true;
+}
+
+gpu::CommandBuffer* CommandBufferLocal::GetCommandBuffer() {
+  return command_buffer_.get();
+}
+
+/******************************************************************************/
+// gpu::GpuControl:
+/******************************************************************************/
+
+gpu::Capabilities CommandBufferLocal::GetCapabilities() {
+  return decoder_->GetCapabilities();
+}
+
+int32_t CommandBufferLocal::CreateImage(ClientBuffer buffer,
+                                        size_t width,
+                                        size_t height,
+                                        unsigned internalformat) {
+  gles2::MojoGpuMemoryBufferImpl* gpu_memory_buffer =
+      gles2::MojoGpuMemoryBufferImpl::FromClientBuffer(buffer);
+
+  scoped_refptr<gfx::GLImageMemory> image(
+      new gfx::GLImageMemory(gfx::Size(width, height),
+                                       internalformat));
+  if (!image->Initialize(
+          static_cast<const unsigned char*>(gpu_memory_buffer->GetMemory()),
+          gpu_memory_buffer->GetFormat())) {
+    return -1;
+  }
+
+  static int32 next_id = 1;
+  int32 new_id = next_id++;
+
+  gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
+  DCHECK(image_manager);
+  image_manager->AddImage(image.get(), new_id);
+  return new_id;
+}
+
+void CommandBufferLocal::DestroyImage(int32 id) {
+  gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
+  DCHECK(image_manager);
+  image_manager->RemoveImage(id);
+}
+
+int32_t CommandBufferLocal::CreateGpuMemoryBufferImage(
+    size_t width,
+    size_t height,
+    unsigned internalformat,
+    unsigned usage) {
+  DCHECK_EQ(usage, static_cast<unsigned>(GL_MAP_CHROMIUM));
+  scoped_ptr<gfx::GpuMemoryBuffer> buffer(
+      gles2::MojoGpuMemoryBufferImpl::Create(
+          gfx::Size(width, height),
+          gpu::ImageFactory::ImageFormatToGpuMemoryBufferFormat(internalformat),
+          gpu::ImageFactory::ImageUsageToGpuMemoryBufferUsage(usage)));
+  if (!buffer)
+    return -1;
+  return CreateImage(buffer->AsClientBuffer(), width, height, internalformat);
+}
+
+uint32_t CommandBufferLocal::InsertSyncPoint() {
+  return 0;
+}
+
+uint32_t CommandBufferLocal::InsertFutureSyncPoint() {
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+void CommandBufferLocal::RetireSyncPoint(uint32_t sync_point) {
+  NOTIMPLEMENTED();
+}
+
+void CommandBufferLocal::SignalSyncPoint(uint32_t sync_point,
+                                              const base::Closure& callback) {
+}
+
+void CommandBufferLocal::SignalQuery(uint32_t query,
+                                     const base::Closure& callback) {
+  // TODO(piman)
+  NOTIMPLEMENTED();
+}
+
+void CommandBufferLocal::SetSurfaceVisible(bool visible) {
+  // TODO(piman)
+  NOTIMPLEMENTED();
+}
+
+uint32_t CommandBufferLocal::CreateStreamTexture(uint32_t texture_id) {
+  // TODO(piman)
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+void CommandBufferLocal::SetLock(base::Lock* lock) {
+  NOTIMPLEMENTED();
+}
+
+bool CommandBufferLocal::IsGpuChannelLost() {
+  // This is only possible for out-of-process command buffers.
+  return false;
+}
+
+void CommandBufferLocal::PumpCommands() {
+  if (!decoder_->MakeCurrent()) {
+    command_buffer_->SetContextLostReason(decoder_->GetContextLostReason());
+    command_buffer_->SetParseError(::gpu::error::kLostContext);
+    return;
+  }
+  scheduler_->PutChanged();
+}
+
+void CommandBufferLocal::OnResize(gfx::Size size, float scale_factor) {
+  surface_->Resize(size);
+}
+
+void CommandBufferLocal::OnUpdateVSyncParameters(
+    const base::TimeTicks timebase,
+    const base::TimeDelta interval) {
+  if (client_)
+    client_->UpdateVSyncParameters(timebase.ToInternalValue(),
+                                   interval.ToInternalValue());
+
+}
+
+bool CommandBufferLocal::OnWaitSyncPoint(uint32_t sync_point) {
+  if (!sync_point)
+    return true;
+  if (gpu_state_->sync_point_manager()->IsSyncPointRetired(sync_point))
+    return true;
+  scheduler_->SetScheduled(false);
+  gpu_state_->sync_point_manager()->AddSyncPointCallback(
+      sync_point, base::Bind(&CommandBufferLocal::OnSyncPointRetired,
+                             weak_factory_.GetWeakPtr()));
+  return scheduler_->IsScheduled();
+}
+
+void CommandBufferLocal::OnParseError() {
+  gpu::CommandBuffer::State state = command_buffer_->GetLastState();
+  OnContextLost(state.context_lost_reason);
+}
+
+void CommandBufferLocal::OnContextLost(uint32_t reason) {
+  if (client_)
+    client_->DidLoseContext();
+}
+
+void CommandBufferLocal::OnSyncPointRetired() {
+  scheduler_->SetScheduled(true);
+}
+
+}  // namespace gles2