From 9764c13d6d2977903f407761b27d847c0056e1c4 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp
Date: Wed, 30 Dec 2020 02:25:23 -0300
Subject: video_core: Rewrite the texture cache

The current texture cache has several points that hurt maintainability
and performance. It's easy to break unrelated parts of the cache
when doing minor changes. The cache can easily forget valuable
information about the cached textures by CPU writes or simply by its
normal usage.The current texture cache has several points that hurt
maintainability and performance. It's easy to break unrelated parts
of the cache when doing minor changes. The cache can easily forget
valuable information about the cached textures by CPU writes or simply
by its normal usage.

This commit aims to address those issues.
---
 src/video_core/sampler_cache.h | 60 ------------------------------------------
 1 file changed, 60 deletions(-)
 delete mode 100644 src/video_core/sampler_cache.h

(limited to 'src/video_core/sampler_cache.h')

diff --git a/src/video_core/sampler_cache.h b/src/video_core/sampler_cache.h
deleted file mode 100644
index cbe3ad071..000000000
--- a/src/video_core/sampler_cache.h
+++ /dev/null
@@ -1,60 +0,0 @@
-// 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
\ No newline at end of file
-- 
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