ssr_pass.hpp

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#pragma once
 
#include "../post_process_pass_base.hpp"
#include "../post_process_target.hpp"
#include "../shader_layout.hpp"
#include "../vulkan_common.hpp"
#include "../vulkan_pipeline.hpp"
 
#include <glm/glm.hpp>
#include <optional>
#include <vector>
 
namespace renderer {
class VulkanCore;
 
class SsrPass : public IPostProcessPass {
public:
  SsrPass(const VulkanCore& core, vk::Format scene_format, vk::Extent2D extent);
 
  [[nodiscard]]
  auto name() const -> std::string_view override {
    return "SSR";
  }
 
  auto record(vk::CommandBuffer cmd, uint32_t frame_index, vk::ImageView source_view) -> vk::ImageView override;
 
  void onResize(vk::Extent2D extent) override;
 
private:
  struct Params {
    glm::mat4 view_projection {1.0f};
    glm::mat4 inverse_view_projection {1.0f};
    glm::vec4 camera_position {0.0f};
    glm::vec4 tuning {0.0f};
    glm::vec4 marching {0.0f};
  };

  static constexpr vk::Format k_reflection_format = vk::Format::eR16G16B16A16Sfloat;
 
  void createResources(const VulkanCore& core);
  void createTargets(const VulkanCore& core, vk::Extent2D extent);
 
  const VulkanCore* m_core = nullptr;
  vk::Format m_scene_format = vk::Format::eUndefined;
 
  ShaderLayout m_shader_layout;
  VulkanPipeline m_trace_pipeline;
  VulkanPipeline m_composite_pipeline;
 
  vk::raii::Sampler m_sampler = nullptr;
  vk::raii::Sampler m_point_sampler = nullptr;
 
  std::vector<vk::raii::DescriptorSet> m_descriptor_sets;
  std::vector<vk::ImageView> m_bound_views;
 
  PostProcessTarget m_reflection_target;
  PostProcessTarget m_target;
};
 
}