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drape/vulkan/vulkan_param_descriptor.hpp

@@ -0,0 +1,82 @@
+#pragma once
+
+#include "drape/graphics_context.hpp"
+#include "drape/vulkan/vulkan_gpu_program.hpp"
+#include "drape/vulkan/vulkan_utils.hpp"
+
+#include <array>
+#include <cstdint>
+#include <limits>
+#include <string>
+#include <vector>
+
+namespace dp
+{
+namespace vulkan
+{
+struct ParamDescriptor
+{
+  enum class Type : uint8_t
+  {
+    DynamicUniformBuffer = 0,
+    Texture
+  };
+
+  Type m_type = Type::DynamicUniformBuffer;
+
+  VkDescriptorBufferInfo m_bufferDescriptor = {};
+  uint32_t m_bufferDynamicOffset = 0;
+
+  VkDescriptorImageInfo m_imageDescriptor = {};
+  int8_t m_textureSlot = 0;
+
+  uint32_t m_id = 0;
+};
+
+size_t constexpr kMaxDescriptorSets = 8;
+
+struct DescriptorSetGroup
+{
+  VkDescriptorSet m_descriptorSet = {};
+  uint32_t m_descriptorPoolIndex = std::numeric_limits<uint32_t>::max();
+
+  std::array<uint32_t, kMaxDescriptorSets> m_ids = {};
+  bool m_updated = false;
+
+  explicit operator bool()
+  {
+    return m_descriptorSet != VK_NULL_HANDLE &&
+           m_descriptorPoolIndex != std::numeric_limits<uint32_t>::max();
+  }
+
+  void Update(VkDevice device, std::vector<ParamDescriptor> const & descriptors);
+};
+
+class VulkanObjectManager;
+
+class ParamDescriptorUpdater
+{
+public:
+  explicit ParamDescriptorUpdater(ref_ptr<VulkanObjectManager> objectManager);
+
+  void Update(ref_ptr<dp::GraphicsContext> context);
+  void Destroy();
+  VkDescriptorSet GetDescriptorSet() const;
+
+private:
+  void Reset(uint32_t inflightFrameIndex);
+
+  ref_ptr<VulkanObjectManager> m_objectManager;
+  struct UpdateData
+  {
+    std::vector<DescriptorSetGroup> m_descriptorSetGroups;
+    ref_ptr<VulkanGpuProgram> m_program;
+    uint32_t m_updateDescriptorFrame = 0;
+    uint32_t m_descriptorSetIndex = 0;
+  };
+  std::array<UpdateData, kMaxInflightFrames> m_updateData;
+  uint32_t m_currentInflightFrameIndex = 0;
+};
+
+}  // namespace vulkan
+}  // namespace dp