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