gpu: A common GpuMemoryBufferManager implemenetation for clients.

gpu/ipc/client/client_gpu_memory_buffer_manager.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 "gpu/ipc/client/client_gpu_memory_buffer_manager.h"
+
+#include "base/bind.h"
+#include "base/trace_event/trace_event.h"
+#include "gpu/command_buffer/common/sync_token.h"
+#include "gpu/ipc/client/gpu_memory_buffer_impl.h"
+
+namespace gpu {
+
+ClientGpuMemoryBufferManager::ClientGpuMemoryBufferManager(Delegate* delegate)
+    : delegate_(delegate) {
+  DCHECK(delegate_);
+}
+
+ClientGpuMemoryBufferManager::~ClientGpuMemoryBufferManager() {}
+
+std::unique_ptr<gfx::GpuMemoryBuffer>
+ClientGpuMemoryBufferManager::AllocateGpuMemoryBuffer(
+    const gfx::Size& size,
+    gfx::BufferFormat format,
+    gfx::BufferUsage usage,
+    SurfaceHandle surface_handle) {
+  DCHECK(delegate_);
+  DCHECK_EQ(kNullSurfaceHandle, surface_handle);
+  TRACE_EVENT2("renderer",
+               "ClientGpuMemoryBufferManager::AllocateGpuMemoryBuffer", "width",
+               size.width(), "height", size.height());
+
+  gfx::GpuMemoryBufferHandle handle =
+      delegate_->GetSharedMemoryHandle(size, format, usage);
+  if (handle.is_null())
+    return nullptr;
+
+  std::unique_ptr<GpuMemoryBufferImpl> buffer =
+      GpuMemoryBufferImpl::CreateFromHandle(
+          handle, size, format, usage,
+          base::Bind(&ClientGpuMemoryBufferManager::DeletedGpuMemoryBuffer,
+                     this, handle.id));
+  if (!buffer) {
+    DeletedGpuMemoryBuffer(handle.id, SyncToken());
+    return nullptr;
+  }
+
+  return std::move(buffer);
+}
+
+std::unique_ptr<gfx::GpuMemoryBuffer>
+ClientGpuMemoryBufferManager::CreateGpuMemoryBufferFromHandle(
+    const gfx::GpuMemoryBufferHandle& handle,
+    const gfx::Size& size,
+    gfx::BufferFormat format) {
+  NOTIMPLEMENTED();
+  return nullptr;
+}
+
+gfx::GpuMemoryBuffer*
+ClientGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
+    ClientBuffer buffer) {
+  return GpuMemoryBufferImpl::FromClientBuffer(buffer);
+}
+
+void ClientGpuMemoryBufferManager::SetDestructionSyncToken(
+    gfx::GpuMemoryBuffer* buffer,
+    const SyncToken& sync_token) {
+  static_cast<GpuMemoryBufferImpl*>(buffer)->set_destruction_sync_token(
+      sync_token);
+}
+
+void ClientGpuMemoryBufferManager::DeletedGpuMemoryBuffer(
+    gfx::GpuMemoryBufferId id,
+    const SyncToken& token) {
+  DCHECK(delegate_);
+  delegate_->DeletedGpuMemoryBuffer(id, token);
+}
+
+}  // namespace gpu