Implement MusGpuMemoryBufferManager

components/mus/gpu/mus_gpu_memory_buffer_manager.cc

Index: components/mus/gpu/mus_gpu_memory_buffer_manager.cc
diff --git a/components/mus/gpu/mus_gpu_memory_buffer_manager.cc b/components/mus/gpu/mus_gpu_memory_buffer_manager.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c34fee363440868cc0fc970401db779df750c0bd
--- /dev/null
+++ b/components/mus/gpu/mus_gpu_memory_buffer_manager.cc
@@ -0,0 +1,123 @@
+// 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 "components/mus/gpu/mus_gpu_memory_buffer_manager.h"
+
+#include "base/logging.h"
+#include "components/mus/common/generic_shared_memory_id_generator.h"
+#include "components/mus/gpu/gpu_service_mus.h"
+#include "gpu/ipc/client/gpu_memory_buffer_impl.h"
+#include "gpu/ipc/client/gpu_memory_buffer_impl_shared_memory.h"
+#include "gpu/ipc/common/gpu_memory_buffer_support.h"
+#include "gpu/ipc/service/gpu_memory_buffer_factory.h"
+
+namespace mus {
+
+namespace {
+
+MusGpuMemoryBufferManager* g_gpu_memory_buffer_manager = nullptr;
+
+bool IsNativeGpuMemoryBufferFactoryConfigurationSupported(
+    gfx::BufferFormat format,
+    gfx::BufferUsage usage) {
+  switch (gpu::GetNativeGpuMemoryBufferType()) {
+    case gfx::SHARED_MEMORY_BUFFER:
+      return false;
+    case gfx::IO_SURFACE_BUFFER:
+    case gfx::SURFACE_TEXTURE_BUFFER:
+    case gfx::OZONE_NATIVE_PIXMAP:
+      return gpu::IsNativeGpuMemoryBufferConfigurationSupported(format, usage);
+    default:
+      NOTREACHED();
+      return false;
+  }
+}
+}
+
+MusGpuMemoryBufferManager* MusGpuMemoryBufferManager::current() {
+  return g_gpu_memory_buffer_manager;
+}
+
+MusGpuMemoryBufferManager::MusGpuMemoryBufferManager(GpuServiceMus* gpu_service,
+                                                     int client_id)
+    : gpu_service_(gpu_service), client_id_(client_id), weak_factory_(this) {
+  DCHECK(!g_gpu_memory_buffer_manager);
+  g_gpu_memory_buffer_manager = this;
+}
+
+MusGpuMemoryBufferManager::~MusGpuMemoryBufferManager() {
+  g_gpu_memory_buffer_manager = nullptr;
+}
+
+std::unique_ptr<gfx::GpuMemoryBuffer>
+MusGpuMemoryBufferManager::AllocateGpuMemoryBuffer(
+    const gfx::Size& size,
+    gfx::BufferFormat format,
+    gfx::BufferUsage usage,
+    gpu::SurfaceHandle surface_handle) {
+  gfx::GpuMemoryBufferId id = GetNextGenericSharedMemoryId();
+  const bool is_native =
+      IsNativeGpuMemoryBufferFactoryConfigurationSupported(format, usage);
+  if (is_native) {
+    gfx::GpuMemoryBufferHandle handle =
+        gpu_service_->gpu_memory_buffer_factory()->CreateGpuMemoryBuffer(
+            id, size, format, usage, client_id_, surface_handle);
+    if (handle.is_null())
+      return nullptr;
+    return gpu::GpuMemoryBufferImpl::CreateFromHandle(
+        handle, size, format, usage,
+        base::Bind(&MusGpuMemoryBufferManager::DestroyGpuMemoryBuffer,
+                   weak_factory_.GetWeakPtr(), id, client_id_, is_native));
+  }
+
+  DCHECK(gpu::GpuMemoryBufferImplSharedMemory::IsUsageSupported(usage))
+      << static_cast<int>(usage);
+  return gpu::GpuMemoryBufferImplSharedMemory::Create(
+      id, size, format,
+      base::Bind(&MusGpuMemoryBufferManager::DestroyGpuMemoryBuffer,
+                 weak_factory_.GetWeakPtr(), id, client_id_, is_native));
+}
+
+std::unique_ptr<gfx::GpuMemoryBuffer>
+MusGpuMemoryBufferManager::CreateGpuMemoryBufferFromHandle(
+    const gfx::GpuMemoryBufferHandle& handle,
+    const gfx::Size& size,
+    gfx::BufferFormat format) {
+  NOTIMPLEMENTED();
+  return nullptr;
+}
+
+std::unique_ptr<gfx::GpuMemoryBuffer>
+MusGpuMemoryBufferManager::CreateGpuMemoryBufferFromClientId(
+    int client_id,
+    const gfx::GpuMemoryBufferId& gpu_memory_buffer_id) {
+  NOTIMPLEMENTED();
+  return nullptr;
+}
+
+gfx::GpuMemoryBuffer*
+MusGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
+    ClientBuffer buffer) {
+  return gpu::GpuMemoryBufferImpl::FromClientBuffer(buffer);
+}
+
+void MusGpuMemoryBufferManager::SetDestructionSyncToken(
+    gfx::GpuMemoryBuffer* buffer,
+    const gpu::SyncToken& sync_token) {
+  static_cast<gpu::GpuMemoryBufferImpl*>(buffer)->set_destruction_sync_token(
+      sync_token);
+}
+
+void MusGpuMemoryBufferManager::DestroyGpuMemoryBuffer(
+    gfx::GpuMemoryBufferId id,
+    int client_id,
+    bool is_native,
+    const gpu::SyncToken& sync_token) {
+  if (is_native) {
+    gpu_service_->gpu_channel_manager()->DestroyGpuMemoryBuffer(id, client_id,
+                                                                sync_token);
+  }
+}
+
+}  // namespace mus