gpu: Compositor management of GpuMemoryBuffer instances.

content/child/child_gpu_memory_buffer_manager.cc

+// Copyright 2014 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 "content/child/child_gpu_memory_buffer_manager.h"
+
+#include "content/child/child_thread.h"
+#include "content/common/child_process_messages.h"
+#include "content/common/gpu/client/gpu_memory_buffer_impl.h"
+
+namespace content {
+namespace {
+
+void DeletedGpuMemoryBuffer(ThreadSafeSender* sender,
+                            gfx::GpuMemoryBufferType type,
+                            const gfx::GpuMemoryBufferId& id) {
+  TRACE_EVENT0("renderer",
+               "ChildGpuMemoryBufferManager::DeletedGpuMemoryBuffer");
+  sender->Send(new ChildProcessHostMsg_DeletedGpuMemoryBuffer(type, id));
+}
+
+}  // namespace
+
+ChildGpuMemoryBufferManager::ChildGpuMemoryBufferManager(
+    ThreadSafeSender* sender)
+    : sender_(sender) {
+}
+
+ChildGpuMemoryBufferManager::~ChildGpuMemoryBufferManager() {
+}
+
+scoped_ptr<gfx::GpuMemoryBuffer>
+ChildGpuMemoryBufferManager::AllocateGpuMemoryBuffer(
+    const gfx::Size& size,
+    gfx::GpuMemoryBuffer::Format format,
+    gfx::GpuMemoryBuffer::Usage usage) {
+  TRACE_EVENT2("renderer",
+               "ChildGpuMemoryBufferManager::AllocateGpuMemoryBuffer",
+               "width",
+               size.width(),
+               "height",
+               size.height());
+
+  gfx::GpuMemoryBufferHandle handle;
+  IPC::Message* message = new ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer(
+      size.width(), size.height(), format, usage, &handle);
+  bool success = sender_->Send(message);
+  if (!success)
+    return scoped_ptr<gfx::GpuMemoryBuffer>();
+
+  scoped_ptr<GpuMemoryBufferImpl> buffer(GpuMemoryBufferImpl::CreateFromHandle(
+      handle,
+      size,
+      format,
+      base::Bind(
+          &DeletedGpuMemoryBuffer, sender_, handle.type, handle.global_id)));
+  if (!buffer) {
+    sender_->Send(new ChildProcessHostMsg_DeletedGpuMemoryBuffer(
+        handle.type, handle.global_id));
+    return scoped_ptr<gfx::GpuMemoryBuffer>();
+  }
+
+  return buffer.PassAs<gfx::GpuMemoryBuffer>();
+}
+
+gfx::GpuMemoryBuffer*
+ChildGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
+    ClientBuffer buffer) {
+  return GpuMemoryBufferImpl::FromClientBuffer(buffer);
+}
+
+}  // namespace content