Added Vulkan Descriptor Sets and Samplers.

gpu/vulkan/vulkan_descriptor_layout.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_descriptor_layout.h"
+
+#include "base/logging.h"
+#include "gpu/vulkan/vulkan_descriptor_pool.h"
+#include "gpu/vulkan/vulkan_device_queue.h"
+
+namespace gpu {
+
+VulkanDescriptorLayout::VulkanDescriptorLayout(VulkanDeviceQueue* device_queue)
+    : device_queue_(device_queue) {}
+
+VulkanDescriptorLayout::~VulkanDescriptorLayout() {
+  DCHECK_EQ(static_cast<VkDescriptorSetLayout>(VK_NULL_HANDLE), handle_);
+}
+
+bool VulkanDescriptorLayout::Initialize(
+    const std::vector<VkDescriptorSetLayoutBinding>& layout) {
+  VkResult result = VK_SUCCESS;
+  VkDevice device = device_queue_->GetVulkanDevice();
+
+  VkDescriptorSetLayoutCreateInfo layout_create_info = {};
+  layout_create_info.sType =
+      VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
+  layout_create_info.bindingCount = static_cast<uint32_t>(layout.size());
+  layout_create_info.pBindings = layout.data();
+
+  result = vkCreateDescriptorSetLayout(device, &layout_create_info, nullptr,
+                                       &handle_);
+  if (VK_SUCCESS != result) {
+    DLOG(ERROR) << "vkCreateDescriptorSetLayout() failed: " << result;
+    return false;
+  }
+
+  return true;
+}
+
+void VulkanDescriptorLayout::Destroy() {
+  if (VK_NULL_HANDLE != handle_) {
+    vkDestroyDescriptorSetLayout(
+        device_queue_->GetVulkanDevice(), handle_, nullptr);
+    handle_ = VK_NULL_HANDLE;
+  }
+}
+
+}  // namespace gpu