// 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/common/child_process_messages.h"
#include "content/common/generic_shared_memory_id_generator.h"
#include "content/common/gpu/client/gpu_memory_buffer_impl.h"

namespace content {
namespace {

void DeletedGpuMemoryBuffer(ThreadSafeSender* sender,
                            gfx::GpuMemoryBufferId id,
                            uint32 sync_point) {
  TRACE_EVENT0("renderer",
               "ChildGpuMemoryBufferManager::DeletedGpuMemoryBuffer");
  sender->Send(new ChildProcessHostMsg_DeletedGpuMemoryBuffer(id, sync_point));
}

}  // namespace

ChildGpuMemoryBufferManager::ChildGpuMemoryBufferManager(
    ThreadSafeSender* sender)
    : sender_(sender) {
}

ChildGpuMemoryBufferManager::~ChildGpuMemoryBufferManager() {
}

scoped_ptr<gfx::GpuMemoryBuffer>
ChildGpuMemoryBufferManager::AllocateGpuMemoryBuffer(const gfx::Size& size,
                                                     gfx::BufferFormat format,
                                                     gfx::BufferUsage usage) {
  TRACE_EVENT2("renderer",
               "ChildGpuMemoryBufferManager::AllocateGpuMemoryBuffer",
               "width",
               size.width(),
               "height",
               size.height());

  gfx::GpuMemoryBufferHandle handle;
  IPC::Message* message = new ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer(
      content::GetNextGenericSharedMemoryId(), size.width(), size.height(),
      format, usage, &handle);
  bool success = sender_->Send(message);
  if (!success || handle.is_null())
    return nullptr;

  scoped_ptr<GpuMemoryBufferImpl> buffer(GpuMemoryBufferImpl::CreateFromHandle(
      handle, size, format, usage,
      base::Bind(&DeletedGpuMemoryBuffer, sender_, handle.id)));
  if (!buffer) {
    sender_->Send(new ChildProcessHostMsg_DeletedGpuMemoryBuffer(handle.id, 0));
    return nullptr;
  }

  return buffer.Pass();
}

gfx::GpuMemoryBuffer*
ChildGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
    ClientBuffer buffer) {
  return GpuMemoryBufferImpl::FromClientBuffer(buffer);
}

void ChildGpuMemoryBufferManager::SetDestructionSyncPoint(
    gfx::GpuMemoryBuffer* buffer,
    uint32 sync_point) {
  static_cast<GpuMemoryBufferImpl*>(buffer)
      ->set_destruction_sync_point(sync_point);
}

}  // namespace content