shadow_slots.hpp

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#pragma once
 
#include <cstdint>
#include <span>
 
namespace renderer::shadow_slots {

inline constexpr float k_default_retention = 1.5f;

inline constexpr uint32_t k_default_grace_frames = 30;

inline constexpr float k_distance_slack = 1.15f;

inline constexpr float k_resolution_band = 0.1f;
 
struct Candidate {
  uint64_t key = 0;
  float importance = 0.0f;
  bool visible = false;
};
 
struct Slot {
  uint64_t key = 0;
  uint32_t hidden_frames = 0;
  uint32_t resolution = 0;
};

auto assign(std::span<const Candidate> candidates, std::span<Slot> slots, std::span<int32_t> slot_of) -> uint32_t;
 
[[nodiscard]]
auto owns(std::span<const Slot> slots, uint64_t key) -> bool;
 
[[nodiscard]]
auto retention() -> float;
 
[[nodiscard]]
auto graceFrames() -> uint32_t;
 
void setRetention(float factor);
void setGraceFrames(uint32_t frames);

[[nodiscard]]
auto stableResolution(uint32_t current, float camera_distance, float resolution_scale) -> uint32_t;
 
}