Expose Blimp dependencies to the embedder

blimp/client/support/compositor/compositor_dependencies_impl.cc

+// Copyright 2016 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 "blimp/client/support/compositor/compositor_dependencies_impl.h"
+
+#include "blimp/client/support/compositor/blimp_context_provider.h"
+#include "blimp/client/support/compositor/blimp_gpu_memory_buffer_manager.h"
+#include "blimp/client/support/compositor/blimp_layer_tree_settings.h"
+#include "cc/output/context_provider.h"
+#include "cc/surfaces/surface_manager.h"
+#include "cc/trees/layer_tree_settings.h"
+
+namespace blimp {
+namespace client {
+
+CompositorDependenciesImpl::CompositorDependenciesImpl()
+    : gpu_memory_buffer_manager_(
+          base::MakeUnique<BlimpGpuMemoryBufferManager>()),
+      surface_manager_(base::MakeUnique<cc::SurfaceManager>()),
+      next_surface_id_(0) {}
+
+CompositorDependenciesImpl::~CompositorDependenciesImpl() = default;
+
+std::unique_ptr<cc::LayerTreeSettings>
+CompositorDependenciesImpl::GetLayerTreeSettings() {
+  std::unique_ptr<cc::LayerTreeSettings> settings =
+      base::MakeUnique<cc::LayerTreeSettings>();
+  PopulateCommonLayerTreeSettings(settings.get());
+  settings->abort_commit_before_output_surface_creation = false;
+  settings->renderer_settings.buffer_to_texture_target_map =
+      BlimpGpuMemoryBufferManager::GetDefaultBufferToTextureTargetMap();
+  settings->use_output_surface_begin_frame_source = true;
+
+  return settings;
+}
+
+gpu::GpuMemoryBufferManager*
+CompositorDependenciesImpl::GetGpuMemoryBufferManager() {
+  return gpu_memory_buffer_manager_.get();
+}
+
+cc::SurfaceManager* CompositorDependenciesImpl::GetSurfaceManager() {
+  return surface_manager_.get();
+}
+
+uint32_t CompositorDependenciesImpl::AllocateSurfaceId() {
+  return ++next_surface_id_;
+}
+
+void CompositorDependenciesImpl::GetContextProvider(
+    const CompositorDependencies::ContextProviderCallback& callback) {
+  scoped_refptr<cc::ContextProvider> provider = BlimpContextProvider::Create(
+      gfx::kNullAcceleratedWidget, gpu_memory_buffer_manager_.get());
+  callback.Run(provider);
+}
+
+}  // namespace client
+}  // namespace blimp