Added initial implementation of Vulkan Render Passes.

gpu/vulkan/vulkan_command_pool.cc

+// Copyright (c) 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/vulkan/vulkan_command_pool.h"
+
+#include "gpu/vulkan/vulkan_command_buffer.h"
+#include "gpu/vulkan/vulkan_implementation.h"
+
+namespace gpu {
+
+VulkanCommandPool::VulkanCommandPool(VkDevice device, uint32_t queue_index)
+    : device_(device), queue_index_(queue_index) {}
+
+VulkanCommandPool::~VulkanCommandPool() {
+  DCHECK_EQ(0u, command_buffer_count_);
+  DCHECK_EQ(static_cast<VkCommandPool>(VK_NULL_HANDLE), handle_);
+}
+
+bool VulkanCommandPool::Initialize() {
+  VkCommandPoolCreateInfo command_pool_create_info = {};
+  command_pool_create_info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
+  command_pool_create_info.flags =
+      VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
+  command_pool_create_info.queueFamilyIndex = queue_index_;
+
+  VkResult result = vkCreateCommandPool(device_, &command_pool_create_info,
+                                        nullptr, &handle_);
+  if (VK_SUCCESS != result) {
+    DLOG(ERROR) << "vkCreateCommandPool() failed: " << result;
+    return false;
+  }
+
+  return true;
+}
+
+void VulkanCommandPool::Destroy() {
+  DCHECK_EQ(0u, command_buffer_count_);
+  if (VK_NULL_HANDLE != handle_) {
+    vkDestroyCommandPool(device_, handle_, nullptr);
+    handle_ = VK_NULL_HANDLE;
+  }
+}
+
+scoped_ptr<VulkanCommandBuffer>
+VulkanCommandPool::CreatePrimaryCommandBuffer() {
+  scoped_ptr<VulkanCommandBuffer> command_buffer(
+      new VulkanCommandBuffer(this, true));
+  if (!command_buffer->Initialize())
+    return nullptr;
+
+  return command_buffer;
+}
+
+scoped_ptr<VulkanCommandBuffer>
+VulkanCommandPool::CreateSecondaryCommandBuffer() {
+  scoped_ptr<VulkanCommandBuffer> command_buffer(
+      new VulkanCommandBuffer(this, false));
+  if (!command_buffer->Initialize())
+    return nullptr;
+
+  return command_buffer;
+}
+
+void VulkanCommandPool::IncrementCommandBufferCount() {
+  command_buffer_count_++;
+}
+
+void VulkanCommandPool::DecrementCommandBufferCount() {
+  DCHECK_LT(0u, command_buffer_count_);
+  command_buffer_count_--;
+}
+
+}  // namespace gpu