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// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <cstddef>
#include <unordered_map>
#include "video_core/textures/texture.h"
namespace VideoCommon {
struct SamplerCacheKey final : public Tegra::Texture::TSCEntry {
std::size_t Hash() const;
bool operator==(const SamplerCacheKey& rhs) const;
bool operator!=(const SamplerCacheKey& rhs) const {
return !operator==(rhs);
}
};
} // namespace VideoCommon
namespace std {
template <>
struct hash<VideoCommon::SamplerCacheKey> {
std::size_t operator()(const VideoCommon::SamplerCacheKey& k) const noexcept {
return k.Hash();
}
};
} // namespace std
namespace VideoCommon {
template <typename SamplerType, typename SamplerStorageType>
class SamplerCache {
public:
SamplerType GetSampler(const Tegra::Texture::TSCEntry& tsc) {
const auto [entry, is_cache_miss] = cache.try_emplace(SamplerCacheKey{tsc});
auto& sampler = entry->second;
if (is_cache_miss) {
sampler = CreateSampler(tsc);
}
return ToSamplerType(sampler);
}
protected:
virtual SamplerStorageType CreateSampler(const Tegra::Texture::TSCEntry& tsc) const = 0;
virtual SamplerType ToSamplerType(const SamplerStorageType& sampler) const = 0;
private:
std::unordered_map<SamplerCacheKey, SamplerStorageType> cache;
};
} // namespace VideoCommon
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