Added Vulkan Descriptor Sets and Samplers.

gpu/vulkan/vulkan_descriptor_pool.h

+// 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.
+
+#ifndef GPU_VULKAN_VULKAN_DESCRIPTOR_POOL_H_
+#define GPU_VULKAN_VULKAN_DESCRIPTOR_POOL_H_
+
+#include <vulkan/vulkan.h>
+
+#include <memory>
+#include <vector>
+
+#include "base/macros.h"
+
+namespace gpu {
+
+class VulkanDescriptorLayout;
+class VulkanDescriptorSet;
+class VulkanDeviceQueue;
+
+class VulkanDescriptorPool {
+ public:
+  explicit VulkanDescriptorPool(VulkanDeviceQueue* device_queue);
+  ~VulkanDescriptorPool();
+
+  bool Initialize(uint32_t max_descriptor_sets,
+                  const std::vector<VkDescriptorPoolSize>& pool_sizes);
+  void Destroy();
+
+  std::unique_ptr<VulkanDescriptorSet> CreateDescriptorSet(
+      const VulkanDescriptorLayout* layout);
+  VkDescriptorPool handle() { return handle_; }
+
+ private:
+  friend class VulkanDescriptorSet;
+
+  void IncrementDescriptorSetCount();
+  void DecrementDescriptorSetCount();
+
+  VulkanDeviceQueue* device_queue_ = nullptr;
+  VkDescriptorPool handle_ = VK_NULL_HANDLE;
+  uint32_t max_descriptor_sets_ = 0;
+  uint32_t descriptor_count_ = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(VulkanDescriptorPool);
+};
+
+}  // namespace gpu
+
+#endif  // GPU_VULKAN_VULKAN_DESCRIPTOR_POOL_H_